Skocz do pozycji: 1.

Tytuł:

UFA TO TAO
UFA IS TAO

Autorzy:

Weseli, Agnieszka
Ferens, Dominika

Powiązania:

https://bibliotekanauki.pl/articles/1205339.pdf

Data publikacji:

2010

Wydawca:

Uniwersytet Warszawski. Ośrodek Studiów Amerykańskich

Opis:

"What is this UFA?" The more the question comes up, the harder it is to answer. Once someone suggested that it should be answered by means of negations: "UFA is not a dog," "UFA is not cup of tea," "UFA is not a flat wrench"... Because the tao that can be defined is not the real tao.
"Co to jest ta UFA?" - im częściej pada to pytanie, tym trudniej na nie odpowiedzieć. Kiedyś pojawił się pomysł, żeby odpowiadać przeczeniami: "UFA to nie pies", "UFA to nie szklanka herbaty", "UFA to nie klucz nastawny płaski"... Ponieważ tao, które można opisać, nie jest prawdziwym tao.

Źródło:

InterAlia: Pismo poświęcone studiom queer; 2010, 5
1689-6637

Pojawia się w:

InterAlia: Pismo poświęcone studiom queer

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Wizualizacja przepływu ciepła w kamiennym regeneratorze przy wykorzystaniu technologii Tao Framework
The visualization of heat flow in a rock bed by using TAO Framework technology

Autorzy:

Joachimiak, H.
Mueller, W.
Weres, J.
Nowakowski, K.

Powiązania:

https://bibliotekanauki.pl/articles/335310.pdf

Data publikacji:

2009

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych

Tematy:

wizualizacja
ogrzewanie
technologia TAO Framework
visualization
heat
technology TAO Framework

Opis:

Jednym z istotnych elementów, decydujących o właściwym zrozumieniu badanego zjawiska, którego charakter jest złożony, a zarazem przestrzenny, jest jego wizualizacja, na podstawie danych otrzymanych z doświadczenia, bądź w wyniku zrealizowania symulacji komputerowej na bazie określonego modelu systemu empirycznego. Stąd w kontekście aktualnych osiągnięć, techniki wizualizacji pełnią jedną z najskuteczniejszych metod interpretacji pokaźnej liczby danych, ponieważ przedstawiają je w formie, pozwalającej na szybkie i poprawne sformułowanie wniosków dotyczących badanego systemu. W niniejszym artykule, autorzy dokonali przeglądu jednej z najnowszych technologii informatycznych, pozwalającej między innymi na różnorodną graficzną reprezentację danych, jaką jest TAO Framework. Określili również jej przydatność z perspektywy wykorzystania tej techniki do wizualizacji przepływu ciepła, zachodzącego podczas fazy stagnacji kamiennego akumulatora.
One of many essential factors, determining right understanding of conducted experiment, that its nature is complex and spacious, it is its visualization on the basis of experimental data or as a result ofcomputer simulation implementation on the basis of an empirical system model. From this it follows, that at the present time the visualization technologies perform one of the best method of large dataset interpretation, because they show the data in this way, that they let us to form conclusions fast and correctly, concerning a studied system. In this article, the authors have checked one of the newest information technology, allowing various graphical representation of data like Tao Framework. Authors have determined also the use-fulness this technology in visualization of heat flow, occurring during hold mode of a rock bed.

Źródło:

Journal of Research and Applications in Agricultural Engineering; 2009, 54, 2; 48-50
1642-686X
2719-423X

Pojawia się w:

Journal of Research and Applications in Agricultural Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Tao of Security. A Study of Far-Eastern Security Culture Genesis

Autorzy:

Grabińska, Teresa
Piwowarski, Juliusz

Powiązania:

https://bibliotekanauki.pl/articles/1832639.pdf

Data publikacji:

2017

Wydawca:

Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego Apeiron w Krakowie

Tematy:

Buddism
security culture
Tao
Sun Tzu

Opis:

The work contains an analysis of security culture phenomenon from the perspective of Sun Tzu. The idea here is to build the entire universe and a placed-in man, as an area in which operate the impact from the energy of macrocosm. It is the same – corresponding to the body of the universe – with microcosm – the body of a human being immersed in the interaction energy of the endless universe. This concept, combining with the ideas of Confucianism and Buddhism, which here are not broadly discussed, has practical application for over two thousand years in the deliberations on the various areas of human activity. The principles of building and applying of strategies and tactics are to some extent determined by the rhythm of the endless universe cosmic energy – chi (qi). Prevention of risks in an effective way by competent governance in time of peace, and a skilful command in war, comes down to an agile mediation between “Heaven” and “Earth” to use the rhythm of cosmic harmony in the ranks of subordinates.

Źródło:

Security Dimensions; 2017, 22(22); 30-54
2353-7000

Pojawia się w:

Security Dimensions

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Ponadczasowa więź architektury i urbanistyki z naturą na przykładzie Chin – od Tao do współczesności
A Timeless Relationship of Architecture and Urbnism with Nature – The Example of China Since Tao to Contemporaneity

Autorzy:

Kosiński, Wojciech

Powiązania:

https://bibliotekanauki.pl/articles/527181.pdf

Data publikacji:

2019

Wydawca:

Krakowska Akademia im. Andrzeja Frycza Modrzewskiego

Tematy:

creating space with nature
Tao – harmony – road
China
architectural evolution
kreowanie przestrzeni z naturą
Tao – harmonia – droga
Chiny
ewolucje architektury

Opis:

This article is the result of the author’s research done twice in China: a study trip organized by the Cracow University of Technology in 2014 and in 2019, during the Joint Studio programme co-organized by Andrzej Frycz Modrzewski Krakow University and Chinese Tsinghua University of Beijing. The subject coincides with this issue’s topic – the role of nature in architectural creations. China is a great example in this respect, where for thousands of years nature has been treated by the creators of cities and buildings with the highest respect and friendship, especially in the idea of Tao that arose around the 6th century BC. and used it successfully ever since. The relationship between nature and architecture/city planning has varied throughout history and has been intensified in different cultural eras and styles. This demonstrates a wonderful historical panorama. Moreover, it offers contemporary architects a universal, international and useful lesson about China, sustainability, ecology, and high aesthetics.
Niniejszy artykuł jest rezultatem badań autora dokonywanych dwukrotnie w Chinach: w 2014 roku podczas wyjazdu studialnego organizowanego przez Politechnikę Krakowską oraz w 2019 roku w czasie programu Joint Studio współorganizowanego przez Krakowską Akademię im. Andrzeja Frycza Modrzewskiego i chińską uczelnię Tsinghua University z Pekinu. Przedstawiony temat jest zbieżny z problematyką niniejszego numeru czasopisma, którą jest rola natury w kreacjach architektonicznych. Znakomitym przykładem w tej mierze są Chiny, gdzie przez tysiące lat natura była traktowana przez twórców miast i budowli z najwyższym szacunkiem i przyjaźnią, szczególnie w idei Tao zaistniałej około VI wieku p.n.e. i stosowanej z sukcesami po dziś dzień. Relacje natura – architektura/planowanie miast były zróżnicowane poprzez historię oraz bardziej lub mniej zintensyfi kowane w różnych epokach kulturowych i stylach. Ukazuje to czytelnikom wspaniałą panoramę historyczną oraz oferuje współczesnym architektom uniwersalną, międzynarodową i użyteczną lekcję płynącą z Chin, która odnosi się do zrównoważenia, ekologii oraz estetyki wysokiej.

Źródło:

Państwo i Społeczeństwo; 2019, 3; 13-52
1643-8299
2451-0858

Pojawia się w:

Państwo i Społeczeństwo

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Outline of past landscape architecture influenced by Tao - based on examples selected from Chinese metropolises
Zarys dawnej architektury krajobrazu o wpływach idei Tao – na przykładach wybranych z chińskich metropolii

Autorzy:

Kosiński, W.

Powiązania:

https://bibliotekanauki.pl/articles/370490.pdf

Data publikacji:

2018

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

landscape
design
influence
space
Tao
krajobraz
kreacja
oddziaływanie
przestrzeń

Opis:

The concept of Tao is a timeless factor in, among other disciplines, the design of space. The author presents an outline of this subject in the form of results of on-site research of examples of the most important central complexes in two leading Chinese metropolises. The subtle harmony of Tao also results in a subconscious influence. Conclusions from this research demonstrate that Taoism can permeate the creation and reception of works despite different styles being used in them. Thanks to this it can currently constitute an important factor in light of the paradigm of sustainable design.
Idea Tao jest ponadczasowym czynnikiem między innymi w projektowaniu przestrzeni. Autor prezentuje szkicowo na ten temat, rezultaty badań dokonanych „in situ” na przykładzie najważniejszych zespołów centralnych w dwóch czołowych metropoliach chińskich. Subtelna harmonijność Tao powoduje też oddziaływanie podświadome. Wnioski z tych badań ukazują że taoizm może przenikać tworzenie i odbiór dzieł pomimo stosowania w nich innych stylistyk. Dzięki temu może obecnie stanowić ważny czynnik wobec paradygmatu projektowania zrównoważonego.

Źródło:

Przestrzeń i Forma; 2018, 36; 323-334
1895-3247
2391-7725

Pojawia się w:

Przestrzeń i Forma

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

On sums of five almost equal prime squares

Autorzy:

Liu, Jianya
Zhan, Tao

Powiązania:

https://bibliotekanauki.pl/articles/1391073.pdf

Data publikacji:

1996

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Źródło:

Acta Arithmetica; 1996, 77, 4; 369-383
0065-1036

Pojawia się w:

Acta Arithmetica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Study on tensile fracture failure of a steel plate with a surface crack

Autorzy:

Chong, Zhewen
Tao, Jing
Xie, Yuehui
Wu, Dongrong
Li, Tao

Powiązania:

https://bibliotekanauki.pl/articles/2200891.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

steel plate
surface crack
stress intensity factor
SIF
fracture failure

Opis:

In order to study the effect of different surface crack parameters on the fracture failure of steel plate, the model was established by FEM. The results showed that the edge surface crack has the greatest influence on the fracture failure of the steel plate, and for non-edge surface cracks, the central surface crack has the greatest influence on the fracture failure of the steel plate. The larger the a/t and the smaller the a/c, the easier the steel plate fracture failure occurs. The a/c has a certain influence on the variation law of K and the position where Kmax appears.

Źródło:

Journal of Theoretical and Applied Mechanics; 2023, 61, 2; 343--354
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Godot w Wuhan Z Wang Chongiem i Peng Tao rozmawiają Tomasz Wiśniewski i Katarzyną Kręglewska
Godot in Wuhan. Tomasz Wiśniewski and Katarzyną Kręglewska in conversation with Wang Chong and Peng Tao

Autorzy:

Wiśniewski, Tomasz
Kręglewska, Katarzyna

Powiązania:

https://bibliotekanauki.pl/articles/1835562.pdf

Data publikacji:

2021-10

Wydawca:

Instytut im. Jerzego Grotowskiego we Wrocławiu

Źródło:

Didaskalia. Gazeta Teatralna; 2021, 165; 512-527
2720-0043

Pojawia się w:

Didaskalia. Gazeta Teatralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Experimental study and numerical simulation on fly ash separation with different plate voltages in rotary triboelectrostatic separator

Autorzy:

Zhang, L.
Tao, Y.
Tao, D.
Zhang, W.
Yang, L.

Powiązania:

https://bibliotekanauki.pl/articles/110712.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

fly ash
rotary triboelectrostatic separator
plate voltage
numerical simulation

Opis:

As the main solid wastes of coal-fired power plants, fly ash particles with different electrical properties are usually recycled using triboelectrostatic separator. The purpose of this study was to investigate the effect of different plate voltages on the separation of fly ash in a rotary triboelectrostatic separator with experiments and numerical simulation. The maximum values of yield of ash products (48.30%), and decarbonisation rate (50.89%) and the minimum loss-on-ignition (6.61%) were obtained when the plate voltage was 24 kV in the separation experiments, while 55.98%, 59.46%, 5.80% were reached respectively when the plate voltage was 26 kV in the simulation. In general, experimental data were similar with numerical simulation. The turning points appeared around 25 kV due to the increasing mismatch in products, which resulted from the reinforced rebound phenomena, namely the charged particle rebound from the electrode plate with a larger reflection velocity, when the plate voltage increased from 18 to 28 kV. It was validated by the numerical simulation results.

Źródło:

Physicochemical Problems of Mineral Processing; 2018, 54, 3; 722-731
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Singular integrals with holomorphic kernels and Fourier multipliers on star-shaped closed Lipschitz curves

Autorzy:

Qian, Tao

Powiązania:

https://bibliotekanauki.pl/articles/1219972.pdf

Data publikacji:

1997

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Opis:

The paper presents a theory of Fourier transforms of bounded holomorphic functions defined in sectors. The theory is then used to study singular integral operators on star-shaped Lipschitz curves, which extends the result of Coifman-McIntosh-Meyer on the $L^2$-boundedness of the Cauchy integral operator on Lipschitz curves. The operator theory has a counterpart in Fourier multiplier theory, as well as a counterpart in functional calculus of the differential operator 1/i d/dz on the curves.

Źródło:

Studia Mathematica; 1997, 123, 3; 195-216
0039-3223

Pojawia się w:

Studia Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Principles of positron porosimetry

Autorzy:

Zaleski, R.

Powiązania:

https://bibliotekanauki.pl/articles/146520.pdf

Data publikacji:

2015

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

porous materials
positron annihilation lifetime spectroscopy (PALS)
positronium
extended Tao-Eldrup model

Opis:

The paper deals with positron porosimetry (PP), which is based on positron annihilation lifetime spectroscopy (PALS). The numerical analysis of positron lifetime spectra for PP is more demanding than in most of other applications of PALS. The resulting intensity distributions of ortho-positronium (o-Ps) lifetimes are interpreted in terms of the extended Tao-Eldrup (ETE) model, which provides the dependence between the o-Ps lifetime and pore size. Additionally, the relation between the intensity of an o-Ps component and the pore volume allows obtaining pore size distribution (PSD). The value of the empirical parameter Δ, which is dependent on material, can be estimated from the temperature dependence of an o-Ps lifetime. The most unique feature of PP among other techniques that allow determination of PSDs is its ability to perform measurements in almost any conditions. This makes this method suitable for various in situ studies. In this review article, both the capabilities and the limitations of PP are discussed. The methods to overcome some of the limitations are presented.

Źródło:

Nukleonika; 2015, 60, No. 4, part 1; 795-800
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Can Tao-Eldrup Model Be Used at Short o-Ps Lifetime?

Autorzy:

Zgardzińska, B.

Powiązania:

https://bibliotekanauki.pl/articles/1196041.pdf

Data publikacji:

2014-03

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

78.70.Bj
14.60.Cd

Opis:

The distortion of estimated void radii introduced by assumption of an infinite potential depth in the Tao-Eldrup model is discussed. If the deviation by 10% is still acceptable, the range of ortho-Ps lifetimes at which the model gives correct radii is from 1.8 to 6.2 ns.

Źródło:

Acta Physica Polonica A; 2014, 125, 3; 700-701
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Boundedness of singular integral operators with holomorphic kernels on star-shaped closed Lipschitz curves

Autorzy:

Gaudry, Garth
Qian, Tao
Wang, Silei

Powiązania:

https://bibliotekanauki.pl/articles/966841.pdf

Data publikacji:

1996

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Opis:

The aim of this paper is to study singular integrals T generated by holomorphic kernels defined on a natural neighbourhood of the set ${zζ^{-1}: z, ζ ∈ , z ≠ ζ}$, where is a star-shaped Lipschitz curve, $ ={ exp(iz) : z = x+iA(x), A' ∈ L^{∞}[-π,π], A(-π ) =A(π)}$. Under suitable conditions on F and z, the operators are given by (1) $TF(z)= p.v. ∫_ (zη^{-1})F(η)(dη/η).$ We identify a class of kernels of the stated type that give rise to bounded operators on $L^{2} (,|d|)$. We establish also transference results relating the boundedness of kernels on closed Lipschitz curves to corresponding results on periodic, unbounded curves.

Źródło:

Colloquium Mathematicum; 1996, 70, 1; 133-150
0010-1354

Pojawia się w:

Colloquium Mathematicum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

A Hybrid Density Functional Study on PuN

Autorzy:

Yang, Rong
Tang, Bin
Gao, Tao

Powiązania:

https://bibliotekanauki.pl/articles/1029819.pdf

Data publikacji:

2018-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

plutonium mononitride
density-functional theory
hybrid functional

Opis:

The structural, magnetic, electronic, dynamical and thermodynamic properties of PuN have been studied within the frameworks of the density-functional theory, DFT+U and hybrid DFT. The calculations have been performed using the full-potential-linearized augmented plane-wave method. The ferromagnetic and antiferromagnetic configurations are considered in this work. The lattice constants, bulk moduli, densities of states, and thermodynamic data have been computed and compared to available experimental data and other theoretical calculations published in the literature. Total energy results obtained with DFT+U and hybrid DFT indicate that the ground state of PuN is antiferromagnetic, in agreement with experiment. The chemical bonds between Pu and N have a mixture of covalent and ionic components, but the ionic character is stronger than covalent character. The phonon dispersion curves and the optical-mode frequencies are also reported. At last, the effect of spin-orbit coupling on the structural, magnetic, and electronic properties of PuN has been discussed.

Źródło:

Acta Physica Polonica A; 2018, 133, 1; 32-38
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Tocharian A ārkiśoṣi ‘world with radiance’ and Chinese suo po shi jie ‘world of sabhā’

Autorzy:

Pan, Tao

Powiązania:

https://bibliotekanauki.pl/articles/2035886.pdf

Data publikacji:

2022-01-14

Wydawca:

Polska Akademia Nauk. Instytut Kultur Śródziemnomorskich i Orientalnych PAN

Tematy:

Tocharian
Sanskrit
Chinese
world
ārkiśoṣi

Opis:

This article provides an explanation for the single and puzzling Tocharian B gloss śaiṣṣe ‘world’ (instead of Tocharian A ārkiśoṣi) for Sanskrit jagat- ‘world’ on a Sanskrit fragment SHT 4438 with all the other glosses in Tocharian A. Based on a detailed study of the Sanskrit and Chinese texts, Tocharian A ārkiśoṣi is very likely the loan translation of Sanskrit sā̆bhāloka(dhātu)- ‘a world with radiance’, which is preserved in the Chinese translations by Kumārajīva and other translators connected with Kucha. In the Kucha area, the first part sā̆bhā- was understood as containing -(ā)bhā- ‘radiance’. Buddhist Sanskrit sa(b)hāloka(dhātu)- is built from sa(b)hāpati- ‘master of sa(b)hā world’, epithet of the highest divinity Brahmā in the sahāloka-, which derives via Middle Indic from the older epithet sabhāpati- ‘owner of the assembly hall’ in Atharvaveda. The excursus at the end offers a glimpse into the complicated transmission process of Chinese Buddhist terminology based on the analysis of Chinese sha men ‘monk’ and he shang ‘teacher, monk’.

Źródło:

Acta Asiatica Varsoviensia; 2021, 34; 263-294
0860-6102

Pojawia się w:

Acta Asiatica Varsoviensia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Effect of temperature control and high humidity on the preservation of Jufeng grapes

Autorzy:

Zhang, M.
Tao, Q.
Huan, Y.
Wang, H.
Li, C.

Powiązania:

https://bibliotekanauki.pl/articles/24881.pdf

Data publikacji:

2002

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Źródło:

International Agrophysics; 2002, 16, 4; 277-281
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Generalized PI observer design for descriptor linear system

Autorzy:

Wang, Xin-Tao
Yu, Hai-Hua

Powiązania:

https://bibliotekanauki.pl/articles/229300.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

generalized proportional-integral observer
Sylvester matrix equation
regularity
impulse-freeness

Opis:

A kind of generalized proportional-integral (GPI) observer for descriptor linear systems is introduced. We first propose two complete parametric solutions to generalized Sylvester matrix equation corresponding to the left eigenvector matrices in the case of Jordan form. Then a parametric design approach for the observer is presented. The proposed method provides all parametric expression of the gain matrices and the corresponding finite left eigenvector matrix and guarantees the regularity and impulse-freeness of the expanded error system. Two numerical examples are given to explain the design procedure and illustrate the effectiveness of the proposed method.

Źródło:

Archives of Control Sciences; 2019, 29, 4; 585-601
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Pośledniość polityki w doktrynach religii chińskich. Niedziałanie (wuwei) jako zasada panowania

Autorzy:

Kosior, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/421160.pdf

Data publikacji:

2012

Wydawca:

Akademia Ignatianum w Krakowie

Tematy:

konfucjanizm
taoizm
mędrzec-władca
Niebo
Tao
autokultywacja
pewność (cheng)
niedziałanie (wuwei)

Opis:

Artykuł dotyczy kształtowania się idei mędrca-władcy w starożytnej chińskiej myśli religijnej.  Oddający się zapamiętale autokultywacji władca, może osiągnąć cnotę cechującą Niebo (czy Tao). Dzięki temu może przewodzić państwu tak jak samo Niebo (czy Tao), to znaczy bez uciekania się do jakiejkolwiek aktywności politycznej. Mędrzec-władca nie działa, a wszystkie sprawy toczą się w należytym porządku.

Źródło:

Horyzonty Polityki; 2012, 3, 4; 89-105
2082-5897

Pojawia się w:

Horyzonty Polityki

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

The ternary Goldbach problem in arithmetic progressions

Autorzy:

Liu, Jianya
Zhan, Tao

Powiązania:

https://bibliotekanauki.pl/articles/1390842.pdf

Data publikacji:

1997

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

ternary Goldbach problem
exponential sum over primes in arithmetic progressions
mean-value theorem

Opis:

For a large odd integer N and a positive integer r, define b = (b₁,b₂,b₃) and $(N,r) = {b∈ ℕ³ : 1 ≤ b_j ≤ r, (b_j, r) = 1$ and b₁+b₂+b₃ ≡ N (mod r)}. It is known that $#(N,r) = r² ∏_{p|r}_{p|N} ((p-1)(p-2)/p²) ∏_{p|r}_{p∤N} ((p²-3p+3)/p²)$. Let ε > 0 be arbitrary and $R = N^{1/8-ε}$. We prove that for all positive integers r ≤ R, with at most $O(Rlog^{-A}N)$ exceptions, the Diophantine equation N = p₁+p₂+p₃, ⎨ $p_j ≡ b_j (mod r),$ j = 1,2,3,$ ⎩ with prime variables is solvable whenever b ∈ (N,r), where A > 0 is arbitrary.

Źródło:

Acta Arithmetica; 1997, 82, 3; 197-227
0065-1036

Pojawia się w:

Acta Arithmetica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Numerical simulation of flow field in enhanced gravity concentrator

Autorzy:

Zhu, X.
Tao, Y.
Zhang, L..

Powiązania:

https://bibliotekanauki.pl/articles/110160.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

numerical simulation
enhanced gravity concentrator
three-dimensional velocity
turbulence characteristics

Opis:

Enhanced gravity concentrator have excellent separation accuracy for the fine mineral particles. However, its internal flow characteristics are still in unclear. Therefore, numerical simulation was conducted to study the flow characteristics of concentrator. Effect of centrifugal force and fluidization water pressure on the velocity component of fluid was studied. The simulation accuracy was verified by the theoretical calculation. The turbulence intensity in the radial direction was analyzed to reveal the gradient characteristics. Results show that the three-dimensional velocity has different order of magnitude. The increase of centrifugal force significantly improves the three-dimensional velocity of fluid. However, the fluidization water pressure has little influence on the tangential velocity and axial velocity, but it can effectively improve the radial velocity. High turbulent flow energy and high turbulence dissipation rate are presented in the near wall region, which allows the light particles reentering the separation region. Meanwhile, the fluid presents stable flow pattern in the fall wall region that is conducive to the stratification process. In addition, the increase of centrifugal force increases the turbulence in the near wall region; however, fluidization pressure has no effect.

Źródło:

Physicochemical Problems of Mineral Processing; 2018, 54, 3; 975-980
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Empirical Study of the Evolution of Python Questions on Stack Overflow

Autorzy:

Syam, Gopika
Lal, Sangeeta
Chen, Tao

Powiązania:

https://bibliotekanauki.pl/articles/9783959.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

Python programming
Software Development
Stack Overflow
Topic Modelling

Opis:

Background: Python is a popular and easy-to-use programming language. It is constantly expanding, with new features and libraries being introduced daily for a broad range of applications. This dynamic expansion needs a robust support structure for developers to effectively utilise the language. Aim: In this study we conduct an in-depth analysis focusing on several research topics to understand the theme of Python questions and identify the challenges that developers encounter, using the questions posted on Stack Overflow. Method:We perform a quantitative and qualitative analysis of Python questions in Stack Overflow. Topic Modelling is also used to determine the most popular and difficult topics among developers. Results: The findings of this study revealed a recent surge in questions about scientific computing libraries pandas and TensorFlow. Also, we observed that the discussion of Data Structures and Formats is more popular in the Python community, whereas areas such as Installation, Deployment, and IDE are still challenging. Conclusion: This study can direct the research and development community to put more emphasis on tackling the actual issues that Python programmers are facing.

Źródło:

e-Informatica Software Engineering Journal; 2023, 17, 1; 230107
1897-7979

Pojawia się w:

e-Informatica Software Engineering Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Research on resilience model of UAV swarm based on complex network dynamics

Autorzy:

Wei, Kunlun
Zhang, Tao
Chuanfu, Zhang

Powiązania:

https://bibliotekanauki.pl/articles/28328275.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

UAV swarm
resilience
SIS
system dynamics
topology

Opis:

Unmanned Aerial Vehicle (UAV) swarms are utilized in various missions and operated within an open environment that is prone to disruptions. The resilience of UAV swarms, an important requirement, mainly revolves around ensuring stable and uninterrupted operations. Malicious attacks can implement the adverse impacts of potential threats through swarm communication links. In this context, the SIS (Susceptible → Infected → Susceptible) method is suitable for describing the information transmission within UAV swarms. An enhanced resilience model of the UAV swarm is proposed in this study, which incorporates the factors of self-dynamics, dynamics of topology, dynamics of information transmission, and SIS into the complex network model. Self-dynamics refer to the internal dynamics of the drones. In this paper, dynamics of topology consist of three factors: the varying distance between drones, the incoming degrees of each drone, and the number of communication types between drones. Lastly, dynamics of information transmission are characterized by SIS. The model proposed in this paper has the capability to effectively capture changes in the network topology as well as the dynamics of the system, which are significant contributors to the loss of resilience. And then, the average number of susceptible drones is utilized as the metric to evaluate the resilience of the swarm. Furthermore, an experiment is conducted where a UAV swarm successfully carries out a surveillance mission to demonstrate the advantages of our proposed method. The proposed model not only enables the support of mission planning but also facilitates the design enhancements of UAV swarms.

Źródło:

Eksploatacja i Niezawodność; 2023, 25, 4; art. no. 173125
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

The $L^p$ solvability of the Dirichlet problems for parabolic equations

Autorzy:

Tao, Xiang Xing

Powiązania:

https://bibliotekanauki.pl/articles/1206127.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

parabolic equation
$L^p$ solvability
Dirichlet problems
Lip(1,1/2) cylinder

Opis:

For two general second order parabolic equations in divergence form in Lip(1,1/2) cylinders, we give a criterion for the preservation of $L^p$ solvability of the Dirichlet problems.

Źródło:

Studia Mathematica; 2000, 139, 1; 69-80
0039-3223

Pojawia się w:

Studia Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Ultrafiltration treatment of wastewater contained heavy metals complexed with palygorskite

Autorzy:

Ren, Jun
Cao, Tiany
Yang, Xin
Tao, Ling

Powiązania:

https://bibliotekanauki.pl/articles/778555.pdf

Data publikacji:

2020

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

palygorskite
heavy metals
ultrafiltration
complexation
pH
ionic strength

Opis:

Palygorskite was applied in complexation-ultrafiltration treatment of heavy metals in wastewater under different pH and ionic strength. The results indicated that the rejection of heavy metals increased significantly with pH value, and decreased slightly with an increase of ionic strength of Na⁺ and Cl^-. A certain concentration of NaCl significantly reduced the rejection rate of Cu²⁺. The rejection of Cu²⁺, Zn²⁺ and Cd²⁺ could reach over 86.8%, 93.6% and 93.7% at pH of 7 and 0.1 mol/L NaCl. The rejection of heavy metals was severely affected by low molecular weight competing complexing agents and the effect of sodium tartrate was greater than triethanolamine. In the presence of sodium tartrate, the rejection of Cu²⁺, Zn²⁺ and Cd²⁺ could arrive over 81.4%, 57.6% and 60.5% at pH of 7 in 20 min. Palygorskite was offered a potential complexing agent for the removal of heavy metals in wastewater at the complexation-ultrafiltration process.

Źródło:

Polish Journal of Chemical Technology; 2020, 22, 4; 1-9
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Case study of developing an integrated water and nitrogen scheme for agricultural system on the North China Plain

Autorzy:

Liu, Y.
Tao, F.
Lao, Y.
Ma, J.

Powiązania:

https://bibliotekanauki.pl/articles/25700.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Opis:

Appropriate irrigation and nitrogen fertilization, along with suitable crop management strategies, are essential prerequisites for optimum yields in agricultural systems. This research attempts to provide a scientific basis for sustainable agricultural production management for the North China Plain and other semi-arid regions. Based on a series of 72 treatments over 2003-2008, an optimized water and nitrogen scheme for winter wheat/summer maize cropping system was developed. Integrated systems incorporating 120 mm of water with 80 kg N ha-1 N fertilizer were used to simulate winter wheat yields in Hebei and 120 mm of water with 120 kg N ha-1 were used to simulate winter wheat yields in Shandong and Henan provinces in 2000-2007. Similarly, integrated treatments of 40 kg N ha-1 N fertilizer were used to simulate summer maize yields in Hebei, and 80 kg N ha-1 was used to simulate summer maize yields in Shandong and Henan provinces in 2000-2007. Under the optimized scheme, 341.74 107 mm ha-1 of water and 575.79 104 Mg of urea fertilizer could be saved per year under the wheat/maize rotation system. Despite slight drops in the yields of wheat and maize in some areas, water and fertilizer saving has tremendous long-term eco-environmental benefits.

Źródło:

International Agrophysics; 2013, 27, 4
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Research on composite manufacturing method of semi-buried 1×32 optical splitter

Autorzy:

Tao, Qing
Xie, Sihao

Powiązania:

https://bibliotekanauki.pl/articles/27310089.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

optical splitter
composite manufacturing method
EOPCB
electro-optical printed circuit board

Opis:

In this paper, a composite manufacturing method was proposed to reduce the inner surface roughness of silica groove. Firstly, femtosecond laser was used to ablate the silica groove, then, a 5% concentration hydrofluoric acid solution was used to corrode the inner surface of silica groove. Secondly, Su8 adhesive was filled with the groove to form a semi-buried 1×32 optical splitter by doctor blade. The test results showed that the surface roughness Ra was less than 0.2 μm, and average insertion loss of output ports was 21.34 dB, moreover, the uniformity was less than 1.44 dB. Compared with the traditional femtosecond laser ablating method, surface roughness reduced by at least 0.1 μm, and the average insertion loss of output ports was reduced by 1.22 dB, and the uniformity was reduced by 0.41 dB. So, the composite manufacturing method improved the communication performance. It is satisfied with the requirements for optical interconnection in the electro-optical printed circuit boards.

Źródło:

Optica Applicata; 2023, 53, 2; 185--197
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Indigenous Costume Color of Bangladesh: A Traditional Context for Cultural Revival

Autorzy:

Minhus, S. M.
Hui, Tao
Huie, Liang

Powiązania:

https://bibliotekanauki.pl/articles/2171987.pdf

Data publikacji:

2022

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych

Tematy:

Bangladesh
tradition
costume
colour preferences
cultural studies
aesthetics
decoration

Opis:

Traditional elements are generally influenced as the symbols of cultural context that contains the sign of the past. Costume color study of Bangladesh mainly found through psychological thinking that depends on several factors, such as the use of traditional festival elements from history, costume color aesthetics, costume decoration colors of selected geographical regions To analyze costume color firstly, Zaltman Metaphor Elicitation Technique (ZMET) visual analysis method was performed that gives in-depth thoughts on research viewpoints; secondly, statistical analysis was done from research questionaries’ report, and the result has shown that the traditional colors analyzed from the visual analysis are significant. The findings of this analysis would be beneficial in establishing the concept of clothing color in Bangladeshi culture, also presenting an appreciation of the traditional context for the art design learner.

Źródło:

Fibres & Textiles in Eastern Europe; 2022, 2 (151); 123--132
1230-3666
2300-7354

Pojawia się w:

Fibres & Textiles in Eastern Europe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Inversion of side scan sonar motion and posture in seabed geomorphology

Autorzy:

Tao, W.
Liu, Y.
Hu, H.

Powiązania:

https://bibliotekanauki.pl/articles/258774.pdf

Data publikacji:

2017

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

side scan sonar
image matching
image fusion
neutral network
motion inversion

Opis:

Side scan sonar measurement platform, affected by underwater environment and its own motion precision, inevitably has posture and motion disturbance, which greatly affects accuracy of geomorphic image formation. It is difficult to sensitively and accurately capture these underwater disturbances by relying on auxiliary navigation devices. In this paper, we propose a method to invert motion and posture information of the measurement platform by using the matching relation between the strip images. The inversion algorithm is the key link in the image mosaic frame of side scan sonar, and the acquired motion posture information can effectively improve seabed topography and plotting accuracy and stability. In this paper, we first analyze influence of platform motion and posture on side scan sonar mapping, and establish the correlation model between motion, posture information and strip image matching information. Then, based on the model, a reverse neural network is established. Based on input, output of neural network, design of and test data set, a motion posture inversion mechanism based on strip image matching information is established. Accuracy and validity of the algorithm are verified by the experimental results.

Źródło:

Polish Maritime Research; 2017, S 2; 81-88
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Is a regional trading bloc forming in southeast Asia? New evidence for ASEAN countries

Autorzy:

Cieślik, Andrzej
Song, Tao

Powiązania:

https://bibliotekanauki.pl/articles/2035810.pdf

Data publikacji:

2012-12-28

Wydawca:

Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych

Tematy:

ASEAN
Free trade area
Gravity model
Panel data
Preferential trade liberalization

Opis:

This article studies the impact of ASEA N on the bilateral exports of its 10 member countries. It reports the results of applying the gravity model to a data set covering 50 partner countries from 1967 to 2008. The study’s empirical findings show that on average ASEA N regionalism significantly increases bilateral exports. However, the results are country-specific and indicate that ASEA N seems to benefit only large economies with a long history of membership, while smaller more recent members do not show significant expansion of exports.

Źródło:

Miscellanea Geographica. Regional Studies on Development; 2012, 16, 2; 23-29
0867-6046
2084-6118

Pojawia się w:

Miscellanea Geographica. Regional Studies on Development

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Thermodynamics and Kinetics Analysis on Carbothermic Reduction of Calcined Magnesite in Vacuum

Autorzy:

Tang, Qifeng
Ao, Jinqing
Peng, Biyou
Guo, Biao
Yang, Tao

Powiązania:

https://bibliotekanauki.pl/articles/2125546.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

calcined magnesite
carbothermic reduction
vacuum
thermodynamics
kinetics

Opis:

The carbothermic reduction of calcined magnesite in vacuum was studied. By thermodynamic analysis, the starting temperature of reduction reaction dropped from 2173K to 1523K when system pressure dropped from 1 atmosphere to 100 Pa. The experiments were carried out at different conditions under 10~100 Pa and the experimental results shown that the reduction extent of MgO improved by increasing the reaction temperature and time, the pellet forming pressure as well as adding fluoride as catalyst. The rate-determining step of carbothermic reduction process was gas diffusion with the apparent activation energy of 241.19~278.56 kJ/mol.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 3; 1021--1026
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

The Preparation and Properties of Low-Nitrogen Nitrocellulose by Alkaline Denitration

Autorzy:

Tao, Zhongan
Li, Shiying
Ding, Yajun
Xiao, Zhongliang

Powiązania:

https://bibliotekanauki.pl/articles/1062782.pdf

Data publikacji:

2020

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

waste
high-nitrogen nitrocellulose
denitration
nitrogen content
explosion heat
recycling

Opis:

Waste high-nitrogen nitrocellulose (NC) has always been disposed of as hazardous material for destruction, and has not been recycled as a resource. The present work describes how waste high-nitrogen NC may be converted to low-nitrogen NC via an alkaline denitration reaction between sodium hydrosulfide and the nitrate ester groups, in order to control and reduce the nitrogen content for industrial products. Scanning electron microscopy (SEM), infrared spectroscopy (FT-IR), 1H nuclear magnetic resonance spectroscopy (1H NMR) and X-ray diffraction (XRD) were used to detected the changes in the surface morphology and chemical structure of the NC samples. TG-DSC tests analyzed the decomposition temperature and the heat released on thermal decomposition, and the explosion heat was obtained by calorimetry. The results demonstrated that the denitration reaction does not destroy the skeletal structure of NC. Notably, the nitrogen content of NC may be reduced from 12.92 to 10.74%, generating the level for industrial products (N <12%). Moreover, NC samples with different nitrogen contents have similar decomposition trends and decomposition temperatures, but the heat released is gradually decreased and the explosion heat is significantly reduced, and confirms the successful partial removal of nitrate ester groups from NC. Therefore, the alkaline denitration affords a potential method for recycling waste high-nitrogen NC.

Źródło:

Central European Journal of Energetic Materials; 2020, 17, 4; 535-551
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Influence of polysorbate 80 on the flotation of zinc oxide ores with amines

Autorzy:

Xie, Qiaoling
Wang, Dandan
Han, Zhichao
Tao, Huchun
Liu, Sitong

Powiązania:

https://bibliotekanauki.pl/articles/2146852.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

polysorbate 80
pretreated amines
zinc oxide
flotation

Opis:

In this study, the influence of polysorbate 80 on zinc oxide flotation was investigated with an amine collector. The results indicated that the pretreatment of amines with polysorbate 80 enhanced the Zn grade and recovery obtained using zinc oxide flotation. Desliming prior to flotation is not suggested based on the results of this study. The appropriate temperature for flotation was as low as 8 °C, and this flotation method also could be applied to different types of zinc oxide ores. Under optimum flotation conditions, a concentrate with a Zn grade of 48.34% and a Zn recovery of 95.97% was obtained.

Źródło:

Physicochemical Problems of Mineral Processing; 2022, 58, 1; 149--158
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Pinellia ternata agglutinin produced in Bombyx mori cells exhibits bioactivity

Autorzy:

Xu, Tao
Wang, Bo
Wang, Liya
Zhang, Yaozhou
Lv, Zhengbing

Powiązania:

https://bibliotekanauki.pl/articles/1039738.pdf

Data publikacji:

2012

Wydawca:

Polskie Towarzystwo Biochemiczne

Tematy:

Pinellia ternata agglutinin
silkworm bioreactor
plant lectin
Bombyx mori cells

Opis:

Pinellia ternata agglutinin (PTA) is highly homologous to many other monocot mannose-binding lectins which reportedly possess antitumor activities. Its production in silkworm cells has great application potential because the baculovirus expression system can produce post-translationally modified proteins at low cost. In the current study, the pta gene was cloned and expressed in silkworm cells, and the expressed protein was analyzed using a hemagglutination assay. A preliminary in vitro study on its anti-proliferative activity was performed. The results show that the recombinant PTA with an apparent molecular mass of 29 kDa can hemagglutinate rabbit erythrocytes and this activity can be inhibited by D-mannan at a low concentration. In addition, the recombinant hemagglutinin exhibited a dose-dependent anti-proliferative activity on hepatoma cells. The results of the current study suggest that PTA and other important bioactive proteins could be produced by silkworm bioreactor for biomedicine research and application.

Źródło:

Acta Biochimica Polonica; 2012, 59, 2; 231-236
0001-527X

Pojawia się w:

Acta Biochimica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Harmonic mitigation in 18-pulse rectifier based on zigzag autotransformer by DC side auxiliary circuit

Autorzy:

Liu, Jiongde
Chen, Xiaoqiang
Wang, Ying
Chen, Tao

Powiązania:

https://bibliotekanauki.pl/articles/949860.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

18-pulse rectifier
harmonic suppressing
zigzag autotransformer

Opis:

To improve the power quality of a multi-pulse rectifier, a zigzag 18-pulse uncontrolled rectifier with an auxiliary circuit at the DC side is proposed. When the grid-side currents are sinusoidal waves, the required DC side injection currents to be compensated can be obtained by analyzing the AC-DC side relationship of diode bridge rectifiers. Then the 6 compensation currents generated by an active auxiliary circuit are injected into the DC side to eliminate the grid-side harmonics of the rectifier. The simulation results verifying the correctness of the theoretical analysis show that the proposed rectifier can mitigate the harmonic content, as the total harmonic distortion of the grid-side current is about 1.45%. In addition, the single-phase inverter used in the active auxiliary circuit has the characters of simple circuit structure and easy controllability.

Źródło:

Archives of Electrical Engineering; 2020, 69, 4; 891-905
1427-4221
2300-2506

Pojawia się w:

Archives of Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Study on recovery of iron and sulfur from high-sulfur magnetite ore

Autorzy:

Zhao, Yongqiang
Zhou, Wen-tao
Sun, Tichang
Ahmadzai, Asadullah

Powiązania:

https://bibliotekanauki.pl/articles/2146914.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

high-sulfur magnetite
pyrrhotite flotation
magnetic separation
mixed collectors

Opis:

In this paper, to produce a saleable magnetite concentrate with a sulfur level below 0.20% and recover sulfur concentrate, flotation and magnetic separation tests were undertaken. Results showed that the optimum conditions of flotation were established as follows: grinding fineness of 90% particles passing 0.074mm, pH 6, 400 g/t of CuSO4, and 400 g/t of combined collectors. Under these conditions and magnetic separation, S grade of the magnetite concentrate was reduced from 3.20% to 0.18%, and the Fe grade improved from 57.29% to 71.17%. At the same time a sulfur concentrate with S grade of 38.05% and recovery of 91.32% was also obtained. The XPS results showed that the addition of CuSO4 benefited the formation of hydrophobic Sn2-/S0 and Cu+-xanthate, enhancing pyrrhotite floatability. The flotation separation efficiency could be enhanced using a mixture of collectors, and collector mixture demonstrated three synergetic effects, namely enhanced S recovery, improved adsorption behavior of the collectors and enhanced hydrophobicity of pyrrhotite surface.

Źródło:

Physicochemical Problems of Mineral Processing; 2022, 58, 4; art. no. 150889
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Working temperature calculation of single-core cable by nonlinear finite element method

Autorzy:

Meng, Xiaokai
Han, Peijie
Liu, Yongxin
Lu, Zhumao
Jin, Tao

Powiązania:

https://bibliotekanauki.pl/articles/141018.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

cable
finite element simulation model
thermal conductivity
operating temperature

Opis:

By simulating the actual working conditions of a cable, the temperature variation rule of different measuring points under different load currents was analyzed. On this basis, a three-dimensional finite element model (FEM) was established, and the difference and influence factors between the simulation temperature and the experimental measured value were discussed, then the influence of thermal conductivity on the operating temperature of the conductor layer was studied. Finally, combined with the steady-state thermal conductivity model and the experimental measured data, the relation between thermal conductivity and load current was obtained.

Źródło:

Archives of Electrical Engineering; 2019, 68, 3; 643-656
1427-4221
2300-2506

Pojawia się w:

Archives of Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Numerical Modelling of Chamfer Billet of High Carbon Steel During Continuous Casting

Autorzy:

Zong, Nanfu
Ma, Sida
Sun, Weizhao
Liu, Yang
Jing, Tao

Powiązania:

https://bibliotekanauki.pl/articles/2125549.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

chamfer billet
internal cracks
GCr15 steel
soft reduction

Opis:

The formation of internal cracks in as-cast billet is mainly attributed to the stress and strain states near the solidifying front. This study investigates the effect of chamfer configuration of as-cast billet on the maximal principal stress and the tensile stress during soft reduction process. The LIT and ZDT of GCr15 bearing steel are calculated by the solidification phase transformation model. What’s more, the 3D finite element models is established to investigate stress and strain states in the brittle temperature range. The relationships between chamfer angle and maximal principal stress, internal crack, as well as equivalent plastic strain are analyzed. Numerical results reveal that a chamfer configuration of as-cast billet is much more effective than a rectangular one on decreasing the risk of internal cracks.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 3; 967--974
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Deashing and desulphurization of fine oxidized coal by falcon concentrator and flotation

Autorzy:

Zhu, X.
Tao, Y.
Sun, Q.
Man, Z.
Xian, Y.

Powiązania:

https://bibliotekanauki.pl/articles/951856.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

fine oxidized coal
desulphurization
deashing
flotation
enhanced gravity separation

Opis:

Flotation and enhanced gravity separation based on different separation principles were carried out to investigate the desulphurization and deashing efficiency of fine oxidized coal. Surface properties of fresh and oxidized coals were tested by XPS and results showed that the contents of hydrophobic functional groups decreased while the content of hydrophilic functional groups increased after oxidization. Floatability and density analysis results showed that the floatability of coal samples decreased sharply because of oxidation, however, density composition of coal sample only had slight changes. Separation results showed that yields of gravity concentrates outclassed that of flotation concentrates, meanwhile, ash contents and sulfur contents of gravity concentrates were far lower than that of flotation concentrates. Yields and ash contents increased with the collector dosage and achieved to be 17.83 and 26.94% respectively when the collector dosage was 1600 g•Mg-1. Yields and ash contents of gravity concentrates decreased with the centrifugal force and increased with the recoil water flow with similar sulfur content. Clean coal with yield of 53.86%, ash content of 9.81%, sulfur content of 1.47% and with a corresponding desulphurization efficiency of 44.53% was achieved at centrifugal force of 107 g and recoil water flow of 13.3 dm3•min-1. For fine oxidized coal, enhanced gravity separation has a significant advantage of the separation efficiency compared with flotation.

Źródło:

Physicochemical Problems of Mineral Processing; 2016, 52, 2; 634-646
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Testing the Extended Tao-Eldrup Model. Silica Gels Produced with Polymer Template

Autorzy:

Śniegocka, M.
Jasińska, B.
Wawryszczuk, J.
Zaleski, R.
Deryło-Marczewska, A.
Skrzypek, I.

Powiązania:

https://bibliotekanauki.pl/articles/2043364.pdf

Data publikacji:

2005-05

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

78.70.Bj
61.43.Gt

Opis:

The temperature dependence of o-Ps lifetime in the pores calculated from extended Tao-Eldrup model was compared to the experimental data, collected for a set of silica gels synthesized using the polymer template technique. For the sample with average pore radii 2.0 nm rather good agreement between the model and experiment was found. For the sample with narrow pores (near 1.0 nm) the lifetime spectrum was complex. Except the range of highest temperatures the lifetimes are far from model calculations.

Źródło:

Acta Physica Polonica A; 2005, 107, 5; 868-873
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

A two-step fall detection algorithm combining threshold-based method and convolutional neural network

Autorzy:

Xu, Tao
Se, Haifeng
Liu, Jiahui

Powiązania:

https://bibliotekanauki.pl/articles/1848958.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

wearable
fall detection
MPU6050
threshold-based method
convolutional neural network

Opis:

Falls are one of the leading causes of disability and premature death among the elderly. Technical solutions designed to automatically detect a fall event may mitigate fall-related health consequences by immediate medical assistance. This paper presents a wearable device called TTXFD based on MPU6050 which can collect triaxial acceleration signals. We have also designed a two-step fall detection algorithm that fuses threshold-based method (TBM) and machine learning (ML). The TTXFD exploits the TBM stage with low computational complexity to pick out and transmit suspected fall data (triaxial acceleration data). The ML stage of the two-step algorithm is implemented on a server which encodes the data into an image and exploits a fall detection algorithm based on convolutional neural network to identify a fall on the basis of the image. The experimental results show that the proposed algorithm achieves high sensitivity (97.83%), specificity (96.64%) and accuracy (97.02%) on the open dataset. In conclusion, this paper proposes a reliable solution for fall detection, which combines the advantages of threshold-based method and machine learning technology to reduce power consumption and improve classification ability.

Źródło:

Metrology and Measurement Systems; 2021, 28, 1; 23-40
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Comparative Studies on a Chamfer Technology and a Convex Roll Technology During the Soft Reduction Process

Autorzy:

Zong, Nanfu
Jing, Tao
Liu, Yang

Powiązania:

https://bibliotekanauki.pl/articles/2049345.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

convex roll technology
chamfer technology
deformation behavior
cracking risk

Opis:

To comprehensively investigate the diversity of a chamfer technology and a convex roll technology under the same soft reduction process (i.e., section size, reduction amount, casting speed and solid fraction), a three-dimensional mechanical model was developed to investigate the effect of the chamfer profile and roll surface profile on the deformation behavior, cracking risk, stress concentration and reduction force of as-cast bloom during the soft reduction process. It was found that a chamfer bloom and a convex roll can both avoid the thicker corner of the as-cast bloom solidified shell, and significantly reduce reduction force of the withdrawal and straightening units. The convex profile of roll limits lateral spread along bloom width direction, therefore it forms a greater deformation to the mushy zone of as-cast bloom along the casting direction, the tensile strain in the brittleness temperature range (BTR) can obviously increase to form internal cracks. The chamfer bloom is much more effective in compensating the solidification shrinkage of mushy zone. In addition, chamfer bloom has a significant decrease of tensile strain in the brittleness temperature range (BTR) areas, which is expected to greatly reduce the risk of internal cracks.

Źródło:

Archives of Metallurgy and Materials; 2021, 66, 3; 819-829
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Ultrasonic Assisted Active-Passive Filling Friction Stir Repairing to Eliminate Volume Defects

Autorzy:

Wang, Tao
Gong, Xue
Ji, Shude
Xue, Gang
Lv, Zan

Powiązania:

https://bibliotekanauki.pl/articles/2049431.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir repairing
magnesium alloys
defects
ultrasonic
mechanical properties

Opis:

Ultrasonic assisted active-passive filling friction stir repairing (A-PFFSR) was proposed to repair volume defects in the metallic parts. Sound joints without interfacial defects could be achieved. Firstly, the ultrasonic was beneficial to improving material flow and atom diffusion, and then eliminated kissing bond defects compared to conventional A-PFFSR joints. Secondly, the equiaxed grains were refined by ultrasonic vibration. Lastly, the repairing passes were reduced due to the ultrasonic, which decreased softening degree of the repaired joints. The maximum tensile strength of 150 MPa was achieved. Therefore, this strategy to repair the volume defects is feasibility and potential in the remanufacturing fields of aerospace and transportation.

Źródło:

Archives of Metallurgy and Materials; 2021, 66, 1; 217-222
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

The far-zone behaviors of light waves on scattering from particulate medium with various distribution

Autorzy:

Dai, Qihang
Xie, Zhongyuan
Pan, Xiaoning
Ji, Xiaoling
Wang, Tao

Powiązania:

https://bibliotekanauki.pl/articles/2086763.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

weak scattering
particulate collection
spectral density

Opis:

The far-zone spectral density of light waves scattered on a particulate medium was discussed, and the influence of characteristics of the medium on the far-zone scattered spectral density was investigated. It is shown that the normalized spectral density of the scattered field is closely related with the structural characteristics of the particles collection, including the relative size of particles and the distribution information of particles in the collection. These results may provide potential application in the reconstruction of the structure information of particulate medium.

Źródło:

Optica Applicata; 2022, 52, 2; 273--282
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Life Prediction Mechanism of Ladle Composite Structure Body Based on Simulation Technology

Autorzy:

Li, Gongfa
Jiang, Du
Sun, Ying
Jiang, Guozhang
Tao, Bo

Powiązania:

https://bibliotekanauki.pl/articles/353596.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

ladle life prediction
initiative maintenance
crack propagation
thermal shock method

Opis:

Ladle plays an important role in the metallurgical industry whose maintenance directly affects the production efficiency of enterprises. In view of the problems such as low maintenance efficiency and untimely maintenance in the current ladle passive maintenance scheme, the life prediction mechanism for ladle composite structures is established which bases on the stress analysis of steel shell and ladle lining in the production process, combining conventional fatigue analysis and extended fracture theory. The mechanism is accurate and effective according to the simulation results. Through which, the useful life of steel shell can be accurately predicted by detecting the crack length of it. Due to the large number of factors affecting the life of the lining of the ladle, it is difficult to accurately predict the life of the ladle lining, so a forecasting mean based on the thermal shock method is proposed to predict the service life of the ladle lining in this paper. The life prediction mechanism can provide data support and theoretical guidance for the active maintenance of the ladle, which is the prerequisite for scientifically formulating ladle initiative maintenance program.

Źródło:

Archives of Metallurgy and Materials; 2019, 64, 4; 1555-1562
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

A modified Fourier-Ritz method for free vibration of rectangular plates with elastic constrains

Autorzy:

Wu, Tao
Chen, Zhao Bo
Qu, Jian Jun

Powiązania:

https://bibliotekanauki.pl/articles/2086961.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

modified Fourier-Ritz method
rectangular plate
free vibration
boundary conditions

Opis:

In this paper, a modified Fourier-Ritz method is used to study free vibration of a rectangular plate with a set of simply supported opposite sides and another set of arbitrary elastic constraints. The influence of different elastic constraint stiffness values on the modal response of the rectangular plate is also analyzed. In order to avoid that the displacement function of the rectangular plate calculated by the traditional method and its derivative may be discontinuous or non-derivable at the boundary, the displacement function is expressed in the form of the sum of standard cosine series and a periodic polynomial function. Compared with the sine series expansion, the convergence of the result is enhanced. Several sets of numerical examples with different boundary conditions are given in the article, the data shows that the results calculated by this method have good accuracy and fast convergence. In addition, this paper also analyzes the boundary conditions and discusses the influence of different spring stiffness values on the setting of boundary conditions. The results can be applied to the setting of general boundary conditions and the study of vibration control of rectangular plates.

Źródło:

Journal of Theoretical and Applied Mechanics; 2022, 60, 1; 77--89
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Light waves scattering from an anisotropic semi-soft boundary medium with spectral dependence

Autorzy:

Huang, Zhiru
Dai, Qihang
Ji, Xiaoling
Wang, Tao

Powiązania:

https://bibliotekanauki.pl/articles/1835777.pdf

Data publikacji:

2021

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

light scattering
spectral dependent medium
spectral density
spectral degree of coherence

Opis:

The far-zone behavior of polychromatic light waves on scattering from an anisotrophic semi-soft boundary medium with spectral dependence was considered, and the spectral density and the spectral degree of coherence of the far-zone scattered field were investigated. It is shown that the distributions of the spectral density and the spectral degree of coherence of scattered field are closely related with the rms width, the center wavelength, and the maximum value of the center wavelength of the scattering potential of the scattering medium.

Źródło:

Optica Applicata; 2021, 51, 2; 271-280
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

In the Quest for Natural Living: the Taoist and Jungian Roots of Arnold Mindell’s Therapeutic Path

Autorzy:

Kowalski, Arian

Powiązania:

https://bibliotekanauki.pl/articles/22770330.pdf

Data publikacji:

2022

Wydawca:

Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie

Tematy:

natural living
process-oriented psychology
wu wei
Arnold Mindell
Carl Gustav Jung
Tao

Opis:

In this article, I would like to take a closer look at the philosophical meaning of the term “process,” which is a fundamental category in Arnold Mindell’s psychology. The Taoist origins of this concept go back to the Tao – the principle of the universe. Tao is the process of passing into each other the opposite aspects of the monastically understood Qi energy. Mindell was also inspired by the analytical psychology of Carl Gustav Jung, which emphasizes the importance of archetypal, unconscious mental processes and their impact on the ego through random thoughts, fantasies or dreams. Mindell distinguishes between a primary process (mental content that we are aware of) and a secondary process (mental content that we are not aware of) to explain what connects a person with her natural living – an unadulterated existence through rigid boundaries between the two processes acquired during one’s upbringing. The purpose of this article is to explore the Jungian and Taoist roots of Mindell’s psychology and to characterize individual lives as confronting their entire processual being, thus becoming natural living.

Źródło:

Studia Philosophiae Christianae; 2022, 58, 2; 75-88
0585-5470

Pojawia się w:

Studia Philosophiae Christianae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

A fault location method for hybrid transmission lines based on empirical Fourier decomposition

Autorzy:

Tao, Caixia
Xing, Baosheng
Li, Taiguo

Powiązania:

https://bibliotekanauki.pl/articles/27309957.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

empirical Fourier decomposition
fault location
hybrid lines
Teager energy operator
traveling wave method

Opis:

This paper aims to address the problems of inaccurate location and large computation in hybrid transmission line traveling wave detection methods. In this paper, a new fault location method based on empirical Fourier decomposition (EFD) and the Teager energy operator (TEO) is proposed. Firstly, the combination of EFD and the TEO is used to detect the time difference between the arrival of the initial traveling wave of the fault at the two measurement ends of the hybrid line. Then, when the fault occurs at the midpoint of each line segment and at the connection point of the hybrid line, the time difference between the arrival of the fault traveling wave at the two measurement ends of the line is calculated according to the line parameters. By comparing the obtained time differences, it is determined whether the fault occurs in the first or second half of the line. Finally, the fault distance is calculated using the double-ended traveling wave method according to the fault section. The model was built on PSCAD and the proposed algorithm was simulated on MATLAB platform. The results demonstrate that the proposed method achieves an average fault location accuracy of 98.88% by adjusting transition resistances and fault distances and comparing with other location methods. After validation, the proposed method for locating faults has a high level of accuracy in location, computational efficiency, and reliability. It can accurately identify fault segments and locations in hybrid transmission line systems.

Źródło:

Archives of Electrical Engineering; 2023, 72, 4; 1035--1053
1427-4221
2300-2506

Pojawia się w:

Archives of Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

A Celebration of the Wild. On Earth Democracy and the Ethics of Civil Disobedience in Gary Snyder’s Writing

Autorzy:

Kocot, Monika

Powiązania:

https://bibliotekanauki.pl/articles/626288.pdf

Data publikacji:

2020

Wydawca:

Wydawnictwo Uniwersytetu Śląskiego

Tematy:

Gary Snyder
the Wild
interconnectedness
interbeing
rivers
mountains
Zen
Ch'an
Tao

Opis:

The article attempts to shed light upon the evolution of Gary Snyder’s “mountains-and-rivers” philosophy of living/writing (from the Buddhist anarchism of the 1960s to his peace-promoting practice of the Wild), and focuses on the link between the ethics of civil disobedience, deep ecology, and deep “mind-ecology.” Jason M. Wirth’s seminal study titled Mountains, Rivers, and the Great Earth: Reading Gary Snyder and Dōgen in an Age of Ecological Crisis provides an interesting point of reference. The author places emphasis on Snyder’s philosophical fascination with Taoism as well as Ch’an and Zen Buddhism, and tries to show how these philosophical traditions inform his theory and practice of the Wild.

Źródło:

Review of International American Studies; 2020, 13, 1; 99-122
1991-2773

Pojawia się w:

Review of International American Studies

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Silhouette Identification for Apparelled Bodies
Identyfikacja sylwetki ubranego modelu

Autorzy:

Tao, C.
Zhou, J.
Yin, M.

Powiązania:

https://bibliotekanauki.pl/articles/232374.pdf

Data publikacji:

2016

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych

Tematy:

apparel silhouette
identification
face detection
body proportion
shape factor
odzież
sylwetka
identyfikacja
wykrywanie twarzy
proporcje ciała
współczynnik kształtu

Opis:

This paper presents an approach to identify apparel silhouettes. A feature region of the human face was first proposed for conducting face detection in fashion pictures with the AdaBoost method, and the head was then located with its positional relation to the facial feature region. The linear relationship between the ratio of the body height to head length and the length of the lower body was ensured by restricting the RBH to a specific range. Under this condition, the apparelled body was divided into several parts, and the boundary of apparel on the lower body was determined considering the influence of the hemline. Based on the widths of the body parts and the apparel on the lower body, shape factors were established to express the extent to which the apparel silhouette approached a certain shape. A computer program was developed for implementation and demonstrated high accuracy in silhouette identification of an appareled body.
Przedstawiono próbę identyfikacji sylwetki ubranego modelu. Opracowano system właściwości charakteryzujących twarz człowieka dla możliwości dalszego wyodrębnienia twarzy ze zdjęć modeli. Zastosowano metodę AdaBoost. Umożliwiło to usytuowanie głowy w stosunku do innych elementów ubioru. Zidentyfikowano liniowe zależności pomiędzy wysokościami całości sylwetki, jej dolnej części, i głowy. Na tej podstawie ubrana sylwetka człowieka była dzielona na szereg części i określano granice ubioru w stosunku do dolnej części sylwetki, uwzględniając wpływ dolnej krawędzi ubioru. Opierając się na szerokościach poszczególnych części ciała człowieka i ubioru dolnej części sylwetki, ustalono czynniki kształtu dla możliwości kwalifikacji sylwetki do odpowiedniego typu. Opracowano program komputerowy umożliwiający dużą dokładność identyfikacji sylwetki ubranego modelu.

Źródło:

Fibres & Textiles in Eastern Europe; 2016, 5 (119); 119-124
1230-3666
2300-7354

Pojawia się w:

Fibres & Textiles in Eastern Europe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 51.

Tytuł:

Analysis and experiments of embedded gripping mechanism used in large-scale tools holding up pile foundation in ocean

Autorzy:

Wang, Zhuo
Zhang, Bo
Wang, Tao

Powiązania:

https://bibliotekanauki.pl/articles/259156.pdf

Data publikacji:

2019

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

pile foundation
gripping
embedded mechanism
embedded depth
upending gripper

Opis:

With the rapid development of the marine economy and continuous improvement of the industry, the scale of the offshore engineering is increasing. This raises interest in studying, theoretically and experimentally, gripping and bearing mechanisms for large-scale holding and lifting tools used in foundation pile installations. In this paper, the embedded gripping mechanism is studied based on the theory of elastic-plastic mechanics. The embedded and bearing performance of the tooth is simulated and the influence factors are studied. In addition, the device used in the simplified embedded experiment on the tooth of the embedded block is designed. The relationship between embedded depth, load, and tooth profile angle is identified and validated. Meanwhile, the embedded performance of linear and ring type teeth is compared experimentally in order to select the suitable type of tooth for various situations. This comparison makes the basis for designing an upending gripper for the marine pile foundation, which can realize the operation of holding the pile to prevent its falling.

Źródło:

Polish Maritime Research; 2019, 3; 15-21
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 52.

Tytuł:

Manipulating far-field ring-shaped array according to the superposition of weight functions

Autorzy:

Yuan, Chenyuan
Yuan, Caifu
Xiang, Sufen
Ji, Xiaoling
Wang, Tao

Powiązania:

https://bibliotekanauki.pl/articles/2202770.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

partially coherent source
optical manipulation
ring-shaped array
spectral density

Opis:

In order to control the distribution characteristics of the far-field ring-shaped array, we introduce a new light source to produce adjustable far-field distribution by the method of weight function superposition. It has been shown that, by changing the parameters of the light source, one can obtain far-field with various distribution, including distribution with decrease in spectral intensity of specified rings, distribution with disappearances of specified rings, distribution with different spectral intensity of part of lobes in the continuous rings, distribution with part of the lobes in specified rings disappearing and distribution with some lobes in specified rings being stronger. These results will produce some novel far-field distributions which may provide a new idea for further study concerning about the manipulations of far-field array distribution.

Źródło:

Optica Applicata; 2023, 53, 1; 87--98
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 53.

Tytuł:

NEW BETULIN NITRATES: SYNTHESIS, CYTOTOXIC ACTIVITY AND MOLECULAR DOCKING EVALUATION

Autorzy:

Feng, GaiLi
Wang, Tao
Zhang, Rong
Luo, Jin
Xiao, MinJie
He, BaoEn
Liu, YongQian
Wu, JunXiao

Powiązania:

https://bibliotekanauki.pl/articles/895411.pdf

Data publikacji:

2018-10-31

Wydawca:

Polskie Towarzystwo Farmaceutyczne

Tematy:

Molecular docking
anti-tumor
Betulin nitrates
NO donors

Opis:

Betulin and its derivatives have been reported to affect several key genes of cell-cycle regulators. However, their specific targets haven’t yet been discovered. As an important cell cycle regulator, Cyclin-dependent kinase-2 (CDK2) has become a potential target for cancer therapy. Here we describe the design, synthesis and antitumor activities in vitro of eleven new betulin nitrates. The results revealed that compound (20) possesses potent antitumor activity against MCF-7 cell lines (IC50 < 10 μM). In order to investigate potential protein target, betulin nitrates were subjected to docking studies with CDK2. Compound (20) showed very good binding affinity for CDK2 via hydrogen bonding interactions. Thus, the CDK2 inhibitory potential could make compound (20) possible candidate as antitumor agent.

Źródło:

Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 5; 1135-1145
0001-6837
2353-5288

Pojawia się w:

Acta Poloniae Pharmaceutica - Drug Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 54.

Tytuł:

Upregulation of GRP78 and caspase-12 in diastolic failing heart

Autorzy:

Sun, Yingying
Liu, Guanghui
Song, Tao
Liu, Fang
Kang, Weiqiang
Zhang, Yun
Ge, Zhiming

Powiązania:

https://bibliotekanauki.pl/articles/1040708.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Biochemiczne

Tematy:

caspase-12
diastolic heart failure
GRP78; hypertension
apoptosis

Opis:

Background: The endoplasmic reticulum (ER) fulfills multiple cellular functions. Various stimuli can potentially cause ER stress (ERS). ERS is one of the intrinsic apoptosis pathways and apoptosis plays a critical role in hypertension. Glucose regulated protein 78 (GRP78) has been widely used as a marker for ERS and caspase-12 mediated apoptosis was a specific apoptotic pathway of ER. The expression of GRP78 and caspase-12 remains poorly understood in the diastolic heart failure resulting from hypertension. Methods: We used spontaneously hypertensive rats (SHRs) to establish a model of diastolic heart failure, and performed immunohistochemistry, western blot, and real-time PCR to analyze GRP78 and caspase-12. Results: We found that GRP78 and caspase-12 had enhanced expression at protein and mRNA levels. Conclusions: These results suggest that GRP78 and caspase-12 were upregulated in cardiomyocytes and ERS can contribute to cardiac myocyte apoptosis in the diastolic heart failure resulting from hypertension.

Źródło:

Acta Biochimica Polonica; 2008, 55, 3; 511-516
0001-527X

Pojawia się w:

Acta Biochimica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 55.

Tytuł:

Effect of grinding media on the flotation of copper-activated marmatite

Autorzy:

Long, Tao
Chen, Yao
Shi, Juanjuan
Chen, Wei
Zhu, Yangge
Zhang, Chonghui
Bu, Xianzhong

Powiązania:

https://bibliotekanauki.pl/articles/109857.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

grinding media
copper-activated marmatite
flotation separation
surface property

Opis:

How to avoid the shortage of floatability and non-purpose flotation in marmatite flotation is a big problem. This paper innovatively studies how to reduce these two negative phenomena from the perspective of grinding media. The effects of steel and stainless-steel balls on the flotation performance of copper-activated marmatite were investigated mainly through flotation tests, redox potential measurements, ion concentration tests, and XPS and FT-IR spectrum studies. The flotation results showed that the floatability of copper-activated marmatite remarkably decreased by using the steel ball in the grinding process, but it had a mere influence when stainless-steel medium was used. Redox potential measurements showed that the grinding environment of stainless-steel medium could exhibit a higher oxidizing potential than the steel grinding environment. Results from FTIR, XPS, and ion concentration measurements demonstrated that more ferric ions existed on the copper activated marmatite surface in the steel grinding environment than that in the stainless-steel environment. Ferric ions could further hinder the activation effect of copper ions on marmatite and result in decreased marmatite flotation. This research could potentially explain the mechanism of ferric ions in the grinding process, and it can be utilized to improve the flotation performance of marmatite ore through selecting suitable grinding media in ball mill operations.

Źródło:

Physicochemical Problems of Mineral Processing; 2020, 56, 2; 229-237
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 56.

Tytuł:

Experimental study on triboelectrostatic beneficiation of wet fly ash using Microwave Heating

Autorzy:

Li, H.
Chen, Y.
Zhang, X.
Zhao, Y.
Tao, Y.
Li, C.
He, X.

Powiązania:

https://bibliotekanauki.pl/articles/110399.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

wet fly ash
triboelectrostatic beneficiation
microwave heating
efficiency

Opis:

Triboelectrostatic beneficiation, as a physical method, of fly ash cannot only meet the technical requirements of fly ash application but also recycle of an unburned carbon as a useful energy source. The aim of this study was to investigate the feasibility of improving efficiency of triboelectrostatic beneficiation of wet fly ash using microwave heating. The wet fly ash with different moisture contents had an average loss-on-ignition of 12.56%. The fly ash samples were heated in a microwave oven before the experiments. The experimental conditions were electric field voltage of 40 kV and air flux ranging from 12 to 30 m3/h. The influence of the microwave heating on the wet fly ash triboelectrostatic beneficiation was discussed under the conditions of different microwave intensity and irradiation time. The results indicated that the removal rate and recycle rate of the unburned carbon showed a significant increase performance as the wet fly ash was processed by the microwave heating which was attributed to changes of moisture contents and dielectric constants caused by the microwave heating. The feasibility had been verified according to the experimental study on fly ash with different moisture contents. It can be concluded that the microwave heating process was efficiently applied for the wet fly ash triboelectrostatic beneficiation.

Źródło:

Physicochemical Problems of Mineral Processing; 2016, 52, 1; 328-341
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 57.

Tytuł:

Research on Fretting Fatigue of Tungsten Carbide Coating Based on Strain Energy Density Methods

Autorzy:

Zeng, Xin
Wang, Xiaoxiao
Ping, Xuecheng
Wang, Renjie
Hu, Tao

Powiązania:

https://bibliotekanauki.pl/articles/2203727.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

WC coating
crack initiation
cracking angle
critical plane
life prediction

Opis:

The numerical solutions of stress and strain components on the critical plane of tungsten carbide coating were solved based on the critical plane method in three-dimensional coordinate system, and accordingly three strain energy density parameters (Smith-Watson-Topper, Nita-Ogatta-Kuwabara and Chen parameters) were determined to reveal the fretting fatigue characteristics of tungsten carbide coating. In order to predict the fretting fatigue life based on the strain energy density criterion, the expressions between the strain energy density parameter and the fretting fatigue life was obtained experimentally. After the comparison of the three strain energy parameters, it was found that all three parameters could accurately predict the crack initiation position, but only the Smith-Watson-Topper parameters could accurately predict the crack initiation angle. The effects of cyclic load, normal load and friction coefficient on fretting fatigue damage behaviors were discussed by using the Smith-Watson-Topper criterion. The results show that the fretting fatigue life decreases with the increase of cyclic load; an increase in the normal contact load will cause the Smith-Watson-Topper damage parameters more concentrated at the outer edge of the bridge foot; a decrease in the friction coefficient will increase the Smith-Watson-Topper damage parameters in the middle of the contact surface.

Źródło:

Archives of Metallurgy and Materials; 2023, 68, 1; 21--30
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 58.

Tytuł:

Using a vision cognitive algorithm to schedule virtual machines

Autorzy:

Zhao, J.
Mhedheb, Y.
Tao, J.
Jrad, F.
Liu, Q.
Streit, A.

Powiązania:

https://bibliotekanauki.pl/articles/330838.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

cloud computing
vision cognitive algorithm
VM scheduling
simulation
chmura obliczeniowa
algorytm poznawczy
szeregowanie
symulacja

Opis:

Scheduling virtual machines is a major research topic for cloud computing, because it directly influences the performance, the operation cost and the quality of services. A large cloud center is normally equipped with several hundred thousand physical machines. The mission of the scheduler is to select the best one to host a virtual machine. This is an NP-hard global optimization problem with grand challenges for researchers. This work studies the Virtual Machine (VM) scheduling problem on the cloud. Our primary concern with VM scheduling is the energy consumption, because the largest part of a cloud center operation cost goes to the kilowatts used. We designed a scheduling algorithm that allocates an incoming virtual machine instance on the host machine, which results in the lowest energy consumption of the entire system. More specifically, we developed a new algorithm, called vision cognition, to solve the global optimization problem. This algorithm is inspired by the observation of how human eyes see directly the smallest/largest item without comparing them pairwisely. We theoretically proved that the algorithm works correctly and converges fast. Practically, we validated the novel algorithm, together with the scheduling concept, using a simulation approach. The adopted cloud simulator models different cloud infrastructures with various properties and detailed runtime information that can usually not be acquired from real clouds. The experimental results demonstrate the benefit of our approach in terms of reducing the cloud center energy consumption.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2014, 24, 3; 535-550
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 59.

Tytuł:

Geomagnetic detection method for pipeline defects based on ceemdan and WEP-TEO

Autorzy:

Zhang, Tao
Wang, Xinhua
Chen, Yingchun
Shuai, Yi
Ullah, Zia
Ju, Haiyang
Zhao, Yizhen

Powiązania:

https://bibliotekanauki.pl/articles/220762.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

geomagnetic detection
pipeline defects
magnetic field
filtering
data processing

Opis:

This paper presents a geomagnetic detection method for pipeline defects using complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN) and wavelet energy product (WEP) - Teager energy operator (TEO), which improves detection accuracy and defect identification ability as encountering strong inference noise. The measured signal is first subtly decomposed via CEEMDAN into a series of intrinsic mode functions (IMFs), which are then distinguished by the Hurst exponent to reconstruct the filtered signal. Subsequently, the scale signals are obtained by using gradient calculation and discrete wavelet transform and are then fused by using WEP. Finally, TEO is implemented to enhance defect signal amplitude, completing geomagnetic detection of pipeline defects. The simulation results created by magnetic dipole in a noisy environment, indoor experiment results and field testing results certify that the proposed method outperforms ensemble empirical mode decomposition (EEMD)-gradient, EEMD-WEP-TEO, CEEMDAN-gradient in terms of detection deviation, peak side-lobe ratio (PSLR) and integrated side-lobe ratio (ISLR).

Źródło:

Metrology and Measurement Systems; 2019, 26, 2; 345-361
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 60.

Tytuł:

Influence of Annealing Treatment on Deep Drawing Behavior of Q235 Carbon Steel /410/304 Stainless Steels Three-Layer Composite Plate

Autorzy:

Lv, Zehua
Zhang, Zhixiong
Han, Jianchao
Wang, Tao

Powiązania:

https://bibliotekanauki.pl/articles/2106574.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

composite plate
deep drawing
annealing
microstructure

Opis:

Effect of annealing treatment on deep drawing behavior of hot-rolled Q235 carbon steel/410/304 stainless steel three-layer composite plate was investigated. Deep drawability of the unannealed composite plates exhibits a sharp difference for various contact surfaces with the die. The limit drawing ratio (LDR) of the composite plate with the carbon steel contacting the die is 1.75, while it is 1.83 with the stainless steel contacting the die due to the different mechanical responses to the tensile stress at the corner of the die. After annealing at 900°C for 2 h, however, the deep drawabilities of the composite plates both for various contact surfaces with the die are significantly improved and becomes almost identical, which are attributed to the stress relief, the enhanced ductility and the improved interface bonding strength of the hot-rolled component plates during annealing.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 2; 421--433
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 61.

Tytuł:

Defect recognition of buried pipeline based on approximate entropy and variational mode decomposition

Autorzy:

Ju, Haiyang
Wang, Xinhua
Zhang, Tao
Zhao, Yizhen
Ullah, Zia

Powiązania:

https://bibliotekanauki.pl/articles/221572.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Buried Pipeline
Defect Recognition
Geomagnetic Anomaly Detection
Variational Mode Decomposition
Approximate Entropy

Opis:

The study aimed to examine the use of Geomagnetic Anomaly Detection (GAD) to locate the buried ferromagnetic pipeline defects without exposing them. However, the accuracy of GAD is limited by the background noise. In the present work, we propose an approximate entropy noise suppression (AENS) method based on Variational Mode Decomposition (VMD) for detection of pipeline defects. The proposed method is capable of reconstructing the magnetic field signals and extracting weak anomaly signals that are submerged in the background noise, which was employed to construct an effective detector of anomalous signals. The internal parameters of VMD were optimized by the Scale–Space algorithm, and their anti-noise performance was compared. The results show that the proposed method can remove the background noise in high-noise background geomagnetic field environments. Experiments were carried out in our laboratory and evaluation results of inspection data were analysed; the feasibility of GAD is validated when used in the application to detection of buried pipeline defects.

Źródło:

Metrology and Measurement Systems; 2019, 26, 4; 739-755
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 62.

Tytuł:

Fatigue performance of aging asphalt mixtures
Odporność zmęczeniowa starzonych mieszanek asfaltowych

Autorzy:

Song-tao, L.
Zhaohui, L.
Juan, X.

Powiązania:

https://bibliotekanauki.pl/articles/945834.pdf

Data publikacji:

2015

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej

Tematy:

asphalt pavement
road engineering
fatigue
aging
stress ratio
inżynieria drogowa
nawierzchnia asfaltowa
zmiany zmęczeniowe
starzenie
współczynnik asymetrii

Opis:

Fatigue and aging inevitably exist in asphalt pavement. To reveal fatigue characteristics, strength tests were carried out under different loading rates (v). The rules of dynamic loading strength (S_dz) and v were acquired and the real stress ratios corresponding to the fatigue test loading rates were obtained. Fatigue equations describing fatigue life (N_f as a function of the nominal (t_m) and real (t_s) stress ratios were also acquired. It was discovered that the equations could be extended to the strength failure point (t_s = 1, N_f = 1) based on the real stress ratio, but not the nominal stress ratio. The equation provided the theoretical method to design a method to assess aging of asphalt pavement.
Przeprowadzono testy nawierzchni asfaltowych stosując różne szybkości obciążania (v). Określono zależności matematyczne między wytrzymałością na obciążenia dynamiczne (Sdz) i v oraz równania opisujące trwałość zmęczeniową (N_f) w funkcji rzeczywistego współczynnika asymetrii cyklu (t_s) i nominalnego współczynnika asymetrii cyklu (t_m). Stwierdzono, że tylko równanie uwzględniające współczynnik t_s może być stosowane do ekstrapolacji do punktu wytrzymałości na uszkodzenie (t_s = 1, N_f=1). Równanie to pozwala na zaprojektowanie teoretycznej metody oceny starzenia się nawierzchni asfaltowej.

Źródło:

Polimery; 2015, 60, 2; 126-131
0032-2725

Pojawia się w:

Polimery

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 63.

Tytuł:

Spatiotemporal analysis of air quality and its relationship with meteorological factors in the Yangtze River Delta

Autorzy:

Li, Y.
Chen, Y.
Karimian, H.
Tao, T.

Powiązania:

https://bibliotekanauki.pl/articles/1192096.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Tematy:

YRD
air quality index
meteorological elements
correlation analysis
air pollution
spatial analysis

Opis:

Air quality is closely related to people’s health and life. In addition to being directly affected by social activities and atmospheric emissions, the impacts of meteorological factors are also significant. Based on daily Air Quality Index (AQI) data and various meteorological parameters in the Yangtze River Delta (YRD), this paper summarized the spatiotemporal evolution characteristics of AQI over YRD, and quantitatively analyzed the contribution of different meteorological elements to air quality. We also evaluated different spatial interpolation methods to produce surface distribution of AQI, and noted that the Ordinary Kriging outperformed other methods. The spatial distribution of AQI in YRD showed seasonal and annual variations. However, the days with AQI over 100 (level ii) were mostly observed in winter. Generally, more severe air pollution was observed in the northern part of YRD than in the southern ones, for example the air quality of the Ningbo metropolitan area was the best, while in Hefei it was the worst. It was found that meteorological parameters have spatially varying effects on AQI. For instance, pressure has a significant positive effect on AQI, and others showed negative correlations. We also predicted AQI by exploiting different machine learning-based models. Through model comparison, it was found that the Autoregressive Integrated Moving Average Model – ARIMA (0,1,2) has higher prediction accuracy for AQI than Multiple Linear Regression (MLR). The findings of this research can be used in future forecasting of air pollution, and also in air pollution controlling programs.

Źródło:

Journal of Elementology; 2020, 25, 3; 1059-1075
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 64.

Tytuł:

A novel process for extraction of iron from a refractory red mud

Autorzy:

Ding, Wei
Xiao, Junhui
Peng, Yang
Shen, Siyue
Chen, Tao
Zou, Kai
Wang, Zhen

Powiązania:

https://bibliotekanauki.pl/articles/1450194.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

red mud
sodium sulfate
segregation roasting
magnetic separation
iron recovery

Opis:

Red mud is a kind of solid waste produced during alumina extraction from bauxite. To extraction valuable iron from red mud, the technology of adding sodium sulfate-segregation roasting-magnetic separation to treat red mud was developed. During the paper, the effects of various process parameters on the extraction of iron by segregation roasting-magnetic separation were studied, and the phase transformation behavior and microstructure of iron are explored. Repeated test results showed that magnetic concentrate (mass percent), TFe of 80.29 % and overall iron recovery of 92.08 %was obtained. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) results indicated that after the segregation roasting, the hematite was transformed into a new metal phase consisting mainly of metallic iron and magnetite. The addition of sodium sulfate during the segregation roasting can obviously improve the efficiency of segregation roasting-magnetic separation for iron extraction.

Źródło:

Physicochemical Problems of Mineral Processing; 2020, 56, 6; 125-136
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 65.

Tytuł:

A sampling method based on improved firefly algorithm for profile measurement of aviation engine blade

Autorzy:

Huang, Zhi
Zhao, Liao
Li, Kai
Wang, Hongyan
Zhou, Tao

Powiązania:

https://bibliotekanauki.pl/articles/221479.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

aviation engine blade
coordinate measurement machine
profile measurement
improved firefly algorithm

Opis:

Coordinate Measurement Machines (CMMs) have been extensively used in inspecting mechanical parts with higher accuracy. In order to enhance the efficiency and precision of the measurement of aviation engine blades, a sampling method of profile measurement of aviation engine blade based on the firefly algorithm is researched. Then, by comparing with the equal arc-length sampling algorithm (EAS) and the equi-parametric sampling algorithm (EPS) in one simulation, the proposed sampling algorithm shows its better sampling quality than the other two algorithms. Finally, the effectiveness of the algorithm is verified by an experimental example of blade profile. Both simulated and experimental results show that the method proposed in this paper can ensure the measurement accuracy by measuring a smaller number of points.

Źródło:

Metrology and Measurement Systems; 2019, 26, 4; 757-771
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 66.

Tytuł:

Fast attack detection method for imbalanced data in industrial cyber-physical systems

Autorzy:

Huang, Meng
Li, Tao
Li, Beibei
Zhang, Nian
Huang, Hanyuan

Powiązania:

https://bibliotekanauki.pl/articles/23944834.pdf

Data publikacji:

2023

Wydawca:

Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych

Tematy:

intrusion detection system
industrial cyber-physical Systems
imbalanced data
all k-nearest neighbor
LightGBM

Opis:

Integrating industrial cyber-physical systems (ICPSs) with modern information technologies (5G, artificial intelligence, and big data analytics) has led to the development of industrial intelligence. Still, it has increased the vulnerability of such systems regarding cybersecurity. Traditional network intrusion detection methods for ICPSs are limited in identifying minority attack categories and suffer from high time complexity. To address these issues, this paper proposes a network intrusion detection scheme, which includes an information-theoretic hybrid feature selection method to reduce data dimensionality and the ALLKNN-LightGBM intrusion detection framework. Experimental results on three industrial datasets demonstrate that the proposed method outperforms four mainstream machine learning methods and other advanced intrusion detection techniques regarding accuracy, F-score, and run time complexity.

Źródło:

Journal of Artificial Intelligence and Soft Computing Research; 2023, 13, 4; 229--245
2083-2567
2449-6499

Pojawia się w:

Journal of Artificial Intelligence and Soft Computing Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 67.

Tytuł:

Summary of the port shoreline resource evaluation based on triangular fuzzy analytic hierarchy process

Autorzy:

Jiang, L.
Tao, T.
Zhang, C.
Jiang, H.
Wang, J.

Powiązania:

https://bibliotekanauki.pl/articles/259464.pdf

Data publikacji:

2017

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

port shoreline evaluation
triangular fuzzy AHP
fuzzy comprehensive evaluation
shoreline of Nanjing port

Opis:

Port shoreline resources are the basis of port and shipping development, and its assessment method has become one of the hot issues in port research. On the basis of constructing a reasonable index evaluation system, this paper constructs the fuzzy evaluation matrix based on the triangular fuzzy analytic hierarchy process and constructs the fuzzy evaluation matrix by using the fuzzy comprehensive evaluation method, and obtains the maximum membership degree of the port shoreline resources. Compared with the traditional port shoreline Resource evaluation methods, the new one got more advantages in objective and quantitative. Finally, Combined with the Nanjing section of the Yangtze River as a case for verification, the results show that the model can accurately solve the problem of resource evaluation of port shoreline.

Źródło:

Polish Maritime Research; 2017, S 3; 16-22
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 68.

Tytuł:

Theoretical Simulations on Physicochemical Performance of Novel High-energy BHDBT-based Propellants

Autorzy:

Wang, Ke
Huang, Hai-tao
Xu, Hui-xiang
Li, Huan
Li, Jun-qiang
Fan, Xue-zhong
Pang, Wei-qiang

Powiązania:

https://bibliotekanauki.pl/articles/27787879.pdf

Data publikacji:

2021

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

molecular dynamic
BHDBT
migration
mechanical properties
safety

Opis:

Based on Energy Calculation Star program and molecular dynamic method, three designed 2,3-bis(hydroxymethyl)-2,3-dinitro-1,4-butanediol tetranitrate-based (BHDBT) propellants are firstly reported and their physicochemical performance are investigated. Results suggest that compared with HMX-based and CL-20-based propellants, the specific impulses of all BHDBT-based propellants surpass or approximate 280 s, which indicates the latter have the potential to be high-energy propellants. The diffusion coefficient of plasticizers in BHDBT-based propellant decrease as the temperature reduces, and reduce in the order: Bu-NENA > TMETN > BTTN. The densities of all BHDBT-based propellants surpass or approximate 1.7 g/cm3. The comparison of elastic constants, Poisson’s ratios and K/G values indicates that the mechanical properties of three BHDBT-based propellants increase in the order (by plasticizer): Bu-NENA < TMETN < BTTN. The bond length analysis of C–NO2 and O–NO2 bond in BHDBT suggests that the former is the trigger bond in the BHDBT-based propellants, and the safety of BHDBT-based propellants and BHDBT crystal decreases in the order: GAP/BTTN/Al/BHDBT > GAP/Bu-NENA/Al/BHDBT ≈ GAP/TMETN/Al/BHDBT > BHDBT. In conclusion, GAP/BTTN/Al/BHDBT propellant has the potential to be a novel high-energy propellant.

Źródło:

Central European Journal of Energetic Materials; 2021, 18, 1; 5--24
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 69.

Tytuł:

Alkali Degumming and Refining Technology for Chinese Fevervine Fibre
Alkaliczna technologia odklejania i rafinacji chińskiego włókna Fevervine

Autorzy:

Hongwei, Zhang
Dongfeng, Shao
Jianqin, Tao

Powiązania:

https://bibliotekanauki.pl/articles/1857701.pdf

Data publikacji:

2021

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych

Tematy:

Chinese Fevervine fibre
alkali degumming
scouring
spinnability
fibre property
włókno
odklejanie alkaliczne
przędzenie
właściwości włókien

Opis:

In this paper, the Rubiaceae Chinese Fevervine stem was used as raw material, with pool dipping, manual decorticating, acid dipping and sodium hydroxide scouring twice as the degumming method, to produce Chinese Fevervine Fibre (CF fibre). Through an orthogonal experiment, optimised two-fold sodium hydroxide degumming using refining technology was achieved: in the first alkali degumming, the NaOH concentration was 1.4% at a temperaturę of 95 °C for 3.5 hours; in the second , the NaOH concentration was 0.8% at a temperature of 95 °C for 2.5 hours; and in the acid dipping, the sulfuric acid concentration was 6% at room temperature for 0.5 hours. The CF fibre produced has a spinnability of 39.90 mm length, a linear density of 2.82 dtex, a tenacity of 18.56 cN/dtex, and a break elongation of 2.81%.
W pracy omówiono proces wytwarzania chińskiego włókna Fevervine (włókno CF). Poprzez eksperyment ortogonalny uzyskano zoptymalizowane dwukrotne odklejanie wodorotlenkiem sodu przy użyciu technologii rafinacji: w pierwszym odklejaniu alkalicznym stężenie NaOH wynosiło 1.4% w temperaturze 95 °C przez 3.5 godziny; w drugim stężenie NaOH wynosiło 0.8% w temperaturze 95 °C przez 2.5 godziny; a podczas zanurzania w kwasie stężenie kwasu siarkowego wynosiło 6% w temperaturze pokojowej przez 0.5 godziny. Wytworzone włókno CF miało zdolność przędzenia i długości 39.90 mm, gęstość liniową 2.82 dtex, wytrzymałość na rozciąganie 18.56 cN/dtex oraz wydłużenie przy zerwaniu 2.81%.

Źródło:

Fibres & Textiles in Eastern Europe; 2021, 4 (148); 39-42
1230-3666
2300-7354

Pojawia się w:

Fibres & Textiles in Eastern Europe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 70.

Tytuł:

A Lifting Wavelet Domain Audio Watermarking Algorithm Based on the Statistical Characteristics of Sub-Band Coefficients

Autorzy:

Tao, Z.
Zhao, H.
Wu, J.
Gu, J.
Xu, Y.
Wu, D.

Powiązania:

https://bibliotekanauki.pl/articles/177956.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

audio watermarking
lifting wavelet transform
statistical characteristics
sub-band coefficients

Opis:

In this paper, a new lifting wavelet domain audio watermarking algorithm based on the statistical characteristics of sub-band coefficients is proposed. First of all, an original audio signal was segmented and each segment was divided into two sections. Then, the Barker code was used for synchronization, the LWT (lifting wavelet transform) was performed on each section, a synchronization code and a watermark were embedded into the first section and the second section, respectively, by modifying the statistical average value of the sub-band coefficients. The embed strength was determined adaptively according to the auditory masking property. Experiments show that the embedded watermark has better robustness against common signal processing attacks than present algorithms based on LWT and can resist random cropping in particular.

Źródło:

Archives of Acoustics; 2010, 35, 4; 481-491
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 71.

Tytuł:

Speech Enhancement Based on the Multi-Scales and Multi-Thresholds of the Auditory Perception Wavelet Transform

Autorzy:

Tao, Z.
Zhao, H. M.
Zhang, X-J.
Wu, D.

Powiązania:

https://bibliotekanauki.pl/articles/177021.pdf

Data publikacji:

2011

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

speech enhancement
low SNR
auditory perception wavelet transform
unvoiced enhancement
masking effect

Opis:

This paper proposes a speech enhancement method using the multi-scales and multi-thresholds of the auditory perception wavelet transform, which is suitable for a low SNR (signal to noise ratio) environment. This method achieves the goal of noise reduction according to the threshold processing of the human ear’s auditory masking effect on the auditory perception wavelet transform parameters of a speech signal. At the same time, in order to prevent high frequency loss during the process of noise suppression, we first make a voicing decision based on the speech signals. Afterwards, we process the unvoiced sound segment and the voiced sound segment according to the different thresholds and different judgments. Lastly, we perform objective and subjective tests on the enhanced speech. The results show that, compared to other spectral subtractions, our method keeps the components of unvoiced sound intact, while it suppresses the residual noise and the background noise. Thus, the enhanced speech has better clarity and intelligibility.

Źródło:

Archives of Acoustics; 2011, 36, 3; 519-532
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 72.

Tytuł:

Method of cooperative formation control for underactuated USVs based on nonlinear backstepping and cascade system theory

Autorzy:

Dong, Zaopeng
Liu, Yang
Wang, Hao
Qin, Tao

Powiązania:

https://bibliotekanauki.pl/articles/1573634.pdf

Data publikacji:

2021

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

unmanned surface vehicle (USV)
cooperative formation control
underactuated system
nonlinear backstepping
cascade system theory

Opis:

This paper presents a method for the cooperative formation control of a group of underactuated USVs. The problem of formation control is first converted to one of stabilisation control of the tracking errors of the follower USVs using system state transformation design. The followers must keep a fixed distance from the leader USV and a specific heading angle in order to maintain a certain type of formation. A global differential homeomorphism transformation is then designed to create a tracking error system for the follower USVs, in order to simplify the description of the control system. This makes the complex formation control system easy to analyse, and allows it to be decomposed into a cascaded system. In addition, several intermediate state variables and virtual control laws are designed based on nonlinear backstepping, and actual control algorithms for the follower USVs to control the surge force and yaw moment are presented. A global system that can ensure uniform asymptotic stability of the USVs’ cooperative formation control is achieved by combining Lyapunov stability theory and cascade system theory. Finally, several simulation experiments are carried out to verify the validity, stability and reliability of our cooperative formation control method.

Źródło:

Polish Maritime Research; 2021, 1; 149-162
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 73.

Tytuł:

Image compression and encryption algorithm based on advanced encryption standard and hyper-chaotic system

Autorzy:

Nie, Zhe
Liu, Zheng-Xin
He, Xiang-Tao
Gong, Li-Hua

Powiązania:

https://bibliotekanauki.pl/articles/174108.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

hyper-chaotic system
advanced encryption standard
discrete cosine transform
image encryption
image compression

Opis:

An image compression and encryption algorithm by combining the advanced encryption standard (AES) with the hyper-chaotic system is designed, in which Arnold map is employed to eliminate part of the block effect in the image compression process. The original image is compressed with the assistance of a discrete cosine transform and then its transform coefficients are encrypted with the AES algorithm. Besides, the hyper-chaotic system is adopted to introduce the nonlinear processfor image encryption. Numerical simulations and theoretical analyses demonstrate that the proposed image compression and encryption algorithm is of high security and good compression performance.

Źródło:

Optica Applicata; 2019, 49, 4; 545-558
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 74.

Tytuł:

Research on speed control of high speed trains based on hybrid modeling

Autorzy:

Hou, Tao
Tang, Li.
Niu, Hong-xia
Zhao, Tingyang

Powiązania:

https://bibliotekanauki.pl/articles/27311802.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

high-speed train
hybrid modeling
speed control
error compensation
pociąg ekspresowy
modelowanie hybrydowe
kontrola prędkości
kompensacja błędów

Opis:

With the continuous improvement of train speed, the automatic driving of trains instead of driver driving has become the development direction of rail transit in order to realize traffic automation. The application of single modeling methods for speed control in the automatic operation of high-speed trains lacks exploration of the combination of train operation data information and physical model, resulting in low system modeling accuracy, which impacts the effectiveness of speed control and the operation of high-speed trains. To further increase the dynamic modeling accuracy of high-speed train operation and the high-speed train's speed control effect, a high-speed train speed control method based on hybrid modeling of mechanism and data drive is put forward. Firstly, a model of the high-speed train's mechanism was created by analyzing the train's dynamics. Secondly, the improved kernel-principal component regression algorithm was used to create a data-driven model using the actual operation data of the CRH3 (China Railway High-speed 3) high-speed train from Huashan North Railway Station to Xi'an North Railway Station of "Zhengxi High-speed Railway," completing the mechanism model compensation and the error correction of the speed of the actual operation process of the high-speed train, and realizing the hybrid modeling of mechanism and data-driven. Finally, the prediction Fuzzy PID control algorithm was developed based on the natural line and train characteristics to complete the train speed control simulation under the hybrid model and the mechanism model, respectively. In addition, analysis and comparison analysis were conducted. The results indicate that, compared to the high-speed train speed control based on the mechanism model, the high-speed train speed control based on hybrid modeling is more accurate, with an average speed control error reduced by 69.42%. This can effectively reduce the speed control error, improve the speed control effect and operation efficiency, and demonstrate the efficacy of the hybrid modeling and algorithm. The research results can provide a new ideal of multi-model fusion modeling for the dynamic modeling of high-speed train operation, further improve control objectives such as safety, comfort, and efficiency of high-speed train operation, and provide a reference for automatic driving and intelligent driving of high-speed trains.

Źródło:

Archives of Transport; 2023, 66, 2; 77--82
0866-9546
2300-8830

Pojawia się w:

Archives of Transport

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 75.

Tytuł:

Abnormal prediction of dense crowd videos by a purpose-driven lattice Boltzmann model

Autorzy:

Xue, Y.
Liu, P.
Tao, Y.
Tang, X.

Powiązania:

https://bibliotekanauki.pl/articles/329703.pdf

Data publikacji:

2017

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

video surveillance
crowd analysis
abnormal events
lattice Boltzmann model
purpose driven strategy
monitoring wizyjny
analiza tłumu
zdarzenie nieprawidłowe

Opis:

In the field of intelligent crowd video analysis, the prediction of abnormal events in dense crowds is a well-known and challenging problem. By analysing crowd particle collisions and characteristics of individuals in a crowd to follow the general trend of motion, a purpose-driven lattice Boltzmann model (LBM) is proposed. The collision effect in the proposed method is measured according to the variation in crowd particle numbers in the image nodes; characteristics of the crowd following a general trend are incorporated by adjusting the particle directions. The model predicts dense crowd abnormal events in different intervals through iterations of simultaneous streaming and collision steps. Few initial frames of a video are needed to initialize the proposed model and no training procedure is required. Experimental results show that our purpose-driven LBM performs better than most state-of-the-art methods.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2017, 27, 1; 181-194
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 76.

Tytuł:

Relationship between fracture toughness and temperature in epoxy coatings
Odporność powłok epoksydowych na kruche pękanie w funkcji temperatury

Autorzy:

Bo, Z.
Jing-wei, L.
Shu-guang, L.
Yi-hui, L.
Ju-tao, H.

Powiązania:

https://bibliotekanauki.pl/articles/946951.pdf

Data publikacji:

2015

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej

Tematy:

epoxy resin
fracture toughness
żywica epoksydowa
kruche pękanie

Opis:

The fracture toughness KIC of nine kinds of epoxy coating specimens was tested in the temperature range from 20 to -40 °C, and the influence of temperature on KIC was discussed. The results showed that KIC decreases sharply in unmodified systems but increases for some specimens with 20—50 portions of rubber impact modifier. The elastic modulus test indicated that KIC is closely related with the modulus. Scanning Electron Microscopy images showed that the introduction of impact modifier to epoxy can enlarge the ductile deformation of the fracture surface. As a result, the addition of rubber modifier is a suitable path to improve the anti-cracking performance of epoxy coatings at low temperature due to an increase of fracture toughness and reduction of elastic modulus, which thus can reduce the thermal stress in the process of cooling.
Zbadano odporność na kruche pękanie (KIC) dziewięciu rodzajów powłok epoksydowych w zakresie temperatury -40—20 °C. Wyniki badań wskazują, że wartość KIC powłok epoksydowych bez udziału modyfikatora (polimeru uretanowego DESMOCAP 11) zmniejsza się gwałtownie wraz z obniżeniem temperatury. Dodatek modyfikatora, w ilości 20—50 g/100 g żywicy, zwiększa odporność powłok na kruche pękanie. Na podstawie analizy SEM stwierdzono, że wprowadzenie do żywicy epoksydowej modyfikatora DESMOCAP 11 powoduje zmniejszenie deformacji plastycznej powierzchni powłoki poddanej uderzeniu. Wykazano też, że obecność modyfikatora powoduje zmniejszenie wartości modułu Younga i wpływa korzystnie na odporność powłok epoksydowych na naprężenie termiczne związane z procesem chłodzenia.

Źródło:

Polimery; 2015, 60, 4; 258-263
0032-2725

Pojawia się w:

Polimery

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 77.

Tytuł:

Influence of Internal Cracking on Carbide Precipitation in Continuous Casting Bloom Induced by Soft Reduction Technology and the Resulting Segregated Band in Hot-Rolled Wire Rods

Autorzy:

Zong, Nanfu
Jing, Tao
Liu, Yang

Powiązania:

https://bibliotekanauki.pl/articles/2048876.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

internal cracking
carbide precipitation
segregated band
soft reduction technology

Opis:

Internal cracking surrounding primary carbides in high carbon steel as-cast blooms induced by soft reduction is investigated to elucidate their influence of internal cracking on carbide precipitation and the resulting segregated band in hot-rolled wire rods. The primary carbides precipitation in high carbon steel has been investigated using both experimental observations and finite element simulations for as-cast blooms induced by soft reduction. It is found that the carbides precipitation in the vicinity of existing internal cracks is often located midway between the surface and centreline of the bloom, further increases the occurrence of the segregated bands in the hot-rolled wire rods. In addition, the growth of primary carbides surrounding the internal cracking are based on the chemical driving force and high density precipitate zones have been clarified in continuous casting bloom induced by soft reduction. It clearly shows that the spatial distribution of internal cracking surrounding primary carbides that play a key role in the formation of the segregated bands in the final steel products.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 1; 73-82
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 78.

Tytuł:

A new computational method for structural reliability with Big Data
Nowa metoda obliczeniowa oceny niezawodności konstrukcji w oparciu o Big Data

Autorzy:

Fang, Yongfeng
Tao, Wenliang
Tee, Kong Fah

Powiązania:

https://bibliotekanauki.pl/articles/300640.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

big data
reliability
probability
stochastic loads
structure
niezawodność
prawdopodobieństwo
obciążenia stochastyczne
konstrukcja

Opis:

A new computational method for structural reliability based on big data is proposed in this paper. Firstly, the big data is collected via structural monitoring and is analyzed. The big data is then classified into different groups according to the regularities of distribution of the data. In this paper, the stress responses of a suspension bridge due to different types of vehicle are obtained. Secondly, structural reliability prediction model is established using the stress-strength interference theory under the repeated loads after the stress responses and structural strength have been comprehensively considered. In addition, structural reliability index is calculated using the first order second moment method under vehicle loads that are obeying the normal distribution. The minimum reliability among various types of stress responses is chosen as the structural reliability. Finally, the proposed method has been validated for its feasibility and effectiveness by an example.
W artykule zaproponowano nową metodę obliczeniową oceny niezawodności konstrukcji w oparciu o tzw. duże dane (ang. big data). W metodzie tej, duże dane gromadzi się poprzez monitorowanie konstrukcji, a następnie analizuje. W dalszej kolejności, dane są kwalifikowane do różnych grup zgodnie z ich rozkładem. W przedstawionej pracy, rejestrowano reakcje naprężeniowe mostu wiszącego na obciążenia różnymi typami pojazdów. Następnie, po dokładnym zbadaniu reakcji naprężeniowych i wytrzymałości konstrukcji mostu, utworzono model predykcyjny niezawodności konstrukcji z wykorzystaniem teorii obciążeniowo-wytrzymałościowej (ang. stress-strength interference) w warunkach powtarzających się obciążeń. Ponadto, wykorzystano metodę estymacji momentów (FOSM) do obliczenia wskaźnika niezawodności konstrukcji przy obciążeniach ruchem pojazdów zgodnych z rozkładem normalnym. Najmniejszą wartość niezawodności spośród wartości obliczonych dla różnych typów reakcji naprężeniowych przyjęto jako niezawodność konstrukcji. Proponowaną metodę zweryfikowano pod kątem możliwości praktycznego wykorzystania i skuteczności na przykładzie mostu wiszącego w Chinach.

Źródło:

Eksploatacja i Niezawodność; 2019, 21, 1; 159-163
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 79.

Tytuł:

Analysis of Tilted Columnar Dendrites at Grain Boundaries During Wire and Laser Additive Manufacturing: a Phase-Field Study

Autorzy:

Zong, Nanfu
Sun, Weizhao
Liang, Xinghong
Jing, Tao

Powiązania:

https://bibliotekanauki.pl/articles/27313866.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

wire and laser additive manufacturing
tilted columnar dendrites
overgrowth behavior
phase field simulation
grain boundary

Opis:

Tilted columnar dendritic morphologies are usually existed in wire and laser additive manufactured parts of GH3039 alloy. Overgrowth behaviors induced by the tilted dendritic arrays with a large tilted angle, and the effect of the angle between the growth direction and the direction vertical locally to the solid substrate on primary spacing, solute concentration and morphological evolution have been investigated at both the converging and the diverging grain boundaries through the phase-field simulation. The formation of cracking depends on solidification behaviors including columnar dendrites growth and micro-segregation in the interdendritic region. Furthermore, the effect of the tilted columnar dendrites on the susceptibility of crack is investigated during wire and laser additive manufacturing.

Źródło:

Archives of Metallurgy and Materials; 2023, 68, 2; 469--475
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 80.

Tytuł:

Seroepidemiological study of canine Leishmania infantum and Toxoplasma gondii infections in Shanghai, China, and analysis of risk factors

Autorzy:

Jiang, Wei
Wang, Yan
Liu, Yingchun
Li, Tao
Chen, Yongjun
Wang, Shaohui
Han, Xiangan
Wang, Quan

Powiązania:

https://bibliotekanauki.pl/articles/990968.pdf

Data publikacji:

2016

Wydawca:

Instytut Medycyny Wsi

Tematy:

seroprevalence
leishmania infantum
toxoplasma gondii
household dogs
risk factors

Opis:

The aim of this study was to determine the seroprevalence of Leishmania infantum and Toxoplasma gondii among household dogs in Shanghai (the most important industrial and commercial city in China), and to assess the possible risk factors associated with the infection. During 2014–2015, a total of 408 sera were collected from healthy household dogs and tested for L. infantum and T. gondii infection using commercial ELISA kits. The endemic characteristics according to gender, age group and breed were revealed by statistical descriptions and inference. The positive rates of L. infantum infection (24/408, 5.9%) were lower than those of T. gondii infection (37/408, 9.1%), and co-infection with both parasites was detected in seven dogs (7/408, 1.7%). Seropositivity for either parasite was more likely associated with age: the seroprevalence of T. gondii infection ranged from 1.3% (dogs≤1 year) – 18.7% (dogs>6 years), whereas that of L. infantum ranged from 1.3% (dogs≤1 year) – 9.9 % (dogs>6 years). Interestingly, the rates of exposure to both L. infantum and T. gondii were higher in males than in females. Relatively higher exposure rates for L. infantum and T. gondii were also observed in crossbred dogs compared with purebred dogs. However, neither gender nor breed is likely a determining factor for infection with these two parasites (P > 0.05). Identification of the risk factors that underlie these differences may help in the prevention of L. infantum and T. gondii infection in household dogs. To the best of our knowledge, this is the first report of L. infantum and T. gondii infection in household dogs in Shanghai, which shows that these two important parasites are still prevalent in this region. Therefore, it is necessary to take integrated strategies for prevention and control of infection in animals, which could help to reduce human infection in the region.

Źródło:

Annals of Agricultural and Environmental Medicine; 2016, 23, 3
1232-1966

Pojawia się w:

Annals of Agricultural and Environmental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 81.

Tytuł:

Investigations and Comparisons of Active Q-Switching Laser Performances of Composite and Conventional Nd:$YVO_4$ Crystals with Electro-Optic Modulator

Autorzy:

Li, Shixia
Li, Yufei
Zhao, Shengzhi
Li, Guiqiu
Wang, Xiaomei
Yang, Kejian
Li, Tao
Li, Dechun

Powiązania:

https://bibliotekanauki.pl/articles/1398735.pdf

Data publikacji:

2015-03

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

42.55.Xi
42.60.Gd

Opis:

Actively Q-switched laser performances of composite and conventional Nd:$YVO_4$ crystals were investigated and compared with different Nd-doped concentrations of laser media and different repetition rates of electro-optic modulator. Both continuous-wave and actively Q-switched operations were realized experimentally. At an incident pump power of 7.69 W, the shortest pulse duration of 6.5 ns was obtained by the composite Nd(0.1 at.%):$YVO_4$/Nd(0.3 at.%):$YVO_4$/Nd(0.8 at.%):$YVO_4$ crystal at the repetition rate f=2 kHz. However, the composite Nd(0.1 at.%):$YVO_4$/Nd(0.5 at.%):$YVO_4$/Nd(1.0 at.%):$YVO_4$ laser achieved the maximum average output power of 687 mW at f=10 kHz and the largest single pulse energy of 144 μ J at f=2 kHz. Power saturation of the conventional Nd:$YVO_4$ crystal was shown during experiment, while no power saturation was observed on the composite Nd:$YVO_4$crystals, showing good thermo-mechanical performances.

Źródło:

Acta Physica Polonica A; 2015, 127, 3; 711-714
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 82.

Tytuł:

Effective sensor placement based on a VIKOR method considering common cause failure in the presence of epistemic uncertainty

Autorzy:

Duan, Rong-Xing
He, Jie-Jun
Feng, Tao
Huang, Shu-Juan
Chen, Li

Powiązania:

https://bibliotekanauki.pl/articles/1841697.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

dynamic fault tree
epistemic uncertainty
sensor placement
reliability criterion
diagnostic sensor model

Opis:

Owing to expensive cost and restricted structure, limited sensors are allowed to install in modern systems to monitor the working state, which can improve their availability. Therefore, an effective sensor placement method is presented based on a VIKOR algorithm considering common cause failure (CCF) under epistemic uncertainty in this paper. Specifically, a dynamic fault tree (DFT) is developed to build a fault model to simulate dynamic fault behaviors and some reliability indices are calculated using a dynamic evidence network (DEN). Furthermore, a VIKOR method is proposed to choose the possible sensor locations based on these indices. Besides, a sensor model is introduced by using a priority AND gate (PAND) to describe the failure sequence between a sensor and a component. All placement schemes can be enumerated when the number of sensors is given, and the largest system reliability is the best alternative among the placement schemes. Finally, a case study shows that CCF has some influence on sensor placement and cannot be neglected in the reliabilitybased sensor placement.

Źródło:

Eksploatacja i Niezawodność; 2021, 23, 2; 253-262
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 83.

Tytuł:

Pre-concentration of graphite and LiCoO2 in spent lithium-ion batteries using enhanced gravity concentrator

Autorzy:

Zhu, X,-N.
Tao, Y.-J.
He, Y.-Q.
Zhang, Y.
Sun, Q.-X.

Powiązania:

https://bibliotekanauki.pl/articles/109609.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

spent lithium-ion batteries
electrode material
resource utilization
pre-concentration
enhanced gravity concentrator

Opis:

The pre-concentration of electrode material of spent lithium-ion battery has great significance on the resource utilization and environmental protection. The feasibility of separation of graphite and LiCoO2 based on density difference using the enhanced gravity concentrator was verified in this paper. Combustion characteristics of LiCoO2 and graphite were used to propose a simple evaluation index of separation efficiency. Separation tests were carried out to specify the influence of operating parameters on the separation efficiency. Moreover, the effect of particle size on the separation performance was studied. Combustion characteristics results showed that mass loss of graphite was much greater than that of LiCoO2. Thus, mass loss were used to evaluate the purity of product. Effective separation of graphite and LiCoO2 was achieved by the enhanced centrifugal separator. Separation results showed that increasing centrifugal force decreased the overflow yield and increased the graphite content of the overflow stream. In addition, yield of overflow grew an increase in fluidization water pressure, while the purity of graphite in overflow decreased. The effect of particle size on the separation efficiency was also significant, the separation efficiency decreased with the decreasing of particle size.

Źródło:

Physicochemical Problems of Mineral Processing; 2018, 54, 2; 293-299
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 84.

Tytuł:

A new optical frequency transfer method via fibre based on active phase noise compensation with single acousto-optic modulator

Autorzy:

Wang, Guoyong
Yao, Yuanbo
Yan, Tao
Bian, Lang
Meng, Yansong

Powiązania:

https://bibliotekanauki.pl/articles/221592.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

acousto-optic modulator
optical frequency transfer over fibre
phase noise compensation
relative frequency stability

Opis:

In this paper, we propose and experimentally demonstrate a new method for optical frequency transfer over fibre. Instead of dual acousto-optic modulators (AOMs) as adopted in the traditional fibre phase noise compensation setup, here an active fibre phase noise compensation scheme with a single acousto-optic modulator (AOM) is used. The configuration simplifies the equipment of the user end while maintaining a high-performance optical frequency transfer stability. We demonstrate an actively stabilized coherent transfer at an optical frequency of 193.55THz over 10-km spooled fibre, obtaining a relative frequency stability (Allan deviation) of 3.84 x 10^-16/1 s and 4.08 x 10^-18/10⁴ s, which is improved by about 2~3 orders of magnitude in comparison with the one without any phase noise compensation that achieves a relative frequency stability of 1.81 x 10^-14/1 s and 2.48 x 10^-15/10⁴ s.

Źródło:

Metrology and Measurement Systems; 2019, 26, 1; 115-124
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 85.

Tytuł:

Study on separation of fine-particle ilmenite and mechanism using flocculation flotation with sodium oleate and polyacrylamide

Autorzy:

Peng, Yang
Xiao, Junhui
Deng, Bing
Wang, Zhen
Liu, Nengyun
Yang, Daoguang
Ding, Wei
Chen, Tao
Wu, Qiang

Powiązania:

https://bibliotekanauki.pl/articles/1450088.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

sodium oleate
polyacrylamide
synergistic effect
ilmenite
flocculation flotation

Opis:

In this paper, sodium oleate, polyacrylamide, soluble starch and sodium carboxymethyl cellulose were used as flocculants to study the flocculation and sedimentation behavior of microfine ilmenite. Sedimentation test shows that sodium oleate and polyacrylamide have good flocculation effect on ultrafine ilmenite. The flocculation rate of ilmenite can be further improved by the combination of sodium oleate and polyacrylamide. It was found that both flocculants could generate chemical adsorption with ilmenite surface, and they all react with $Fe^{3+}$ on ilmenite surface. However, sodium oleate reacts with $Fe^{3+}$ to form a water-insoluble iron oleate precipitate which coats the surface of the ilmenite and hinders the action of polyacrylamide and the remaining $Fe^{3+}$. This problem can be avoided by adding polyacrylamide followed by sodium oleate, and the flotation recovery can be increased significantly.

Źródło:

Physicochemical Problems of Mineral Processing; 2020, 56, 1; 161-172
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 86.

Tytuł:

Modification of photosensitive resin with fumed silica
Modyfikacja żywicy światłoczułej krzemionką płomieniową

Autorzy:

Zhao, Jie
Song, Tao
Chu, Wei
Wang, Yingying
Bi, Lunan
Han, Zhuoqun
Li, Ling

Powiązania:

https://bibliotekanauki.pl/articles/24202825.pdf

Data publikacji:

2023

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej

Tematy:

photocuring
3D printing
photosensitive resin
fumed silica
fotoutwardzanie
druk 3D
żywica światłoczuła
krzemionka płomieniowa

Opis:

The effect of fumed silica (3 and 5 wt%) on the structure, viscosity, tensile and flexural pro-perties, and hardness of photosensitive acrylic resins used for 3D printing was investigated. The op-timal set of functional properties was obtained with a silica content of 3 wt%. In this case, the resin had the appropriate viscosity, degree of cross-linking, hardness (90 ShD), tensile strength (47 MPa) and flexural strength (96 MPa). The obtained results indicate that the addition of silica effectively reinforce the resin.
Zbadano wpływ krzemionki płomieniowej (3 i 5% mas.) na strukturę, lepkość właściwości mechaniczne przy rozciąganiu i zginaniu oraz twardość światłoczułych żywic akrylowych stosowanych do druku 3D. Optymalny zespół właściwości użytkowych uzyskano przy zawartości krzemionki 3% mas. W tym przypadku żywica miała odpowiednią lepkość, stopień usieciowania, twardość (90 ShD), wytrzymałość na rozciąganie (47 MPa) i wytrzymałość na zginanie (96 MPa). Uzyskane wyniki wskazują, że dodatek krzemionki skutecznie wzmacnia żywicę.

Źródło:

Polimery; 2023, 68, 5; 264--268
0032-2725

Pojawia się w:

Polimery

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 87.

Tytuł:

Study on the Unexpected Loss Measurement of Environmental Pollution from Energy Consumption Waste Emissions in Industrial Parks Based on Extreme Value VaR Model

Autorzy:

Sun, Tao
Shi, Peishi
Zhao, Yu
Han, Xiuyan

Powiązania:

https://bibliotekanauki.pl/articles/27322985.pdf

Data publikacji:

2023

Wydawca:

Politechnika Koszalińska. Wydawnictwo Uczelniane

Tematy:

environmental pollution losses
extreme value VaR model
energy consumption
energy waste emission
Industrial Park

Opis:

The waste emission of energy consumption in industrial parks causes huge expected environmental pollution loss but also causes serious environmental pollution losses in the form of accidents. To explore the measurement method of the environmental pollution losses of waste emissions from energy consumption in industrial parks and the effective way of its application, based on the literature review and theoretical analysis, extreme value theory and VaR theory was introduced to construct the extreme value VaR model for the measurement of environmental pollution losses of wastes emission from energy consumption in industrial parks. The maximum likelihood estimation method was used to estimate the parameters of the measurement model. Then, the application test was carried out with the case data of waste emission from energy consumption in Nanjing MV industrial park, which verifies the effectiveness of the research method and its application.

Źródło:

Rocznik Ochrona Środowiska; 2023, 25; 399--412
1506-218X

Pojawia się w:

Rocznik Ochrona Środowiska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 88.

Tytuł:

Four stage hybrid constructed wetlands treating low-strength aquaculture wastewater with and without artificial aeration

Autorzy:

Zhang, S.-Y.
Li, G.
Li, X.
Tao, L.

Powiązania:

https://bibliotekanauki.pl/articles/207748.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

wastewater treatment
aquaculture
water pollution
wetlands
aquaculture wastewater
artificial aeration
oczyszczanie ścieków
akwakultura
zanieczyszczenie wody
mokradła
sztuczne napowietrzanie
tereny podmokłe

Opis:

Driven by the booming demands for healthy food, aquaculture industry has to deal with the problem of water pollution appropriately so as to achieve sustainable development. In this study, a combination of four stage CWs (three horizontal subsurface flows followed by one free water surface flow) was configured to treat low-strength aquaculture wastewater. For performance assessment, the wetlands were monitored over three years, during which artificial aeration was added to them. By the results, the organic matters and nutrients were mainly sequestered in the anterior subsurface flows, while the surface flow mainly contributed to DO improvement. These results probably implied no necessity of excessive subsurface flows connected in a staged manner. In addition, the artificial aeration improved the treatment performance on ammonium-N, TN and TP in the first-stage CW.

Źródło:

Environment Protection Engineering; 2015, 41, 3; 31-42
0324-8828

Pojawia się w:

Environment Protection Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 89.

Tytuł:

Research on new process for separation of silicon wafers and glass from decommissioned photovoltaic module

Autorzy:

Zhang, Jian wen
Wang, Hai dong
Zhang, Sheng guang
Liang, Han
Guo, Hui
Tao, Si-yao

Powiązania:

https://bibliotekanauki.pl/articles/2175425.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

crystalline silicon photovoltaic modules
decommissioned photovoltaic modules
silicon
solar cell
tempered glass
vibration separation

Opis:

In view of the disadvantages of the existing electrostatic separation process of decommissioned photovoltaic modules, which can only achieve the separation of fine silicon wafers and glass and has high energy consumption, a new process to solve the efficient dry separation of coarse silicon wafers and glass in decommissioned photovoltaic modules is proposed- the vibration separation method. Based on the theoretical analysis of the vibration separation of flaky silicon wafer and polyhedral glass particles, the effects of feed size, feed amount, vibration voltage, vibration frequency, horizontal inclination angle and longitudinal inclination angle on the product indexes of wafer and glass separation were investigated by single factor experiment. The optimal experimental conditions were obtained as follows: feed particle size +0.83mm, feed amount 0.15 t/h, vibration voltage 190 V, vibration frequency 48 Hz, horizontal inclination Angle 8°, longitudinal inclination Angle 3°. Under this optimized condition, the content of metal Si in the obtained silicon wafer product is 84.47%, the recovery rate of is 83.73%, the content of impurity SiO2 is 1.09%, and the content of SiO2 in the obtained glass product is 65.69%, and the recovery rate is 98.95%, the impurity metal Si content is 0.56%. This study provides a research idea for the industrial separation of silicon wafers and glass from decommissioned photovoltaic modules.

Źródło:

Physicochemical Problems of Mineral Processing; 2022, 58, 6; art. no. 151679
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 90.

Tytuł:

Effect of High-Temperature Annealing on the Cross-Tension Property of Resistance Spot Welded Medium-Mn Steel

Autorzy:

Zhao, Bingge
Wang, Yuanfang
Sun, Chenyu
Ding, Kai
Wu, Guanzhi
Wei, Tao
Pan, Hua
Gao, Yulai

Powiązania:

https://bibliotekanauki.pl/articles/2174565.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

medium Mn steel
resistance spot welding
cross-tension strength
martensite
fracture

Opis:

As one of the most promising 3rd generation advanced high strength steels (AHSS), medium Mn steels attract much attention because of their exceptional mechanical property and reasonable cost. However, their application in the modern automotive industry is limited by poor weldability. In this study, 7Mn steel was welded by resistance spot welding (RSW), which was followed by high-temperature annealing to increase the cross-tension property. With this effort, enhanced cross-tension strength (CTS) with a partial interfacial fracture (PIF) mode was realized. During the annealing after RSW that produced martensite, austenitization was realized and then evolved into martensite by the following air cooling. This process produced structure homogeneity across the joint. With respect to the RSW joint, martensite remained the dominant structure after annealing while the diffusion of C and Mn solutes was triggered. With the increase of annealing temperature, the diffusion was enhanced, and the grain boundary embrittlement was reduced, leading to higher CTS.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 4; 1293--1298
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 91.

Tytuł:

Biomass partition and carbon storage of Cunninghamia lanceolata chronosequence plantations in Dabie Mountains in East China

Autorzy:

Xie, X.
Cui, J.
Shi, W.
Liu, X.
Tao, X.
Wang, Q.
Xu, X.N.

Powiązania:

https://bibliotekanauki.pl/articles/41359.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Instytut Dendrologii PAN

Tematy:

biomass
carbon storage
Cunninghamia lanceolata
Chinese fir
chronosequence
plantation forest
Dabie Mountains
China

Opis:

The quantification of biomass carbon pools is important for understanding carbon cycling in forest ecosystems. This study was designed to reveal the effects of stand age on biomass partitioning and carbon storage of Chinese fir plantation stands in Dabie Mountains of Anhui, East China. A total of six even-aged Chinese fir plantation stands along an age-sequence from 10 to 50 years were selected. To quantify the biomass of different tree components, 18 trees with diameter at breast height (D1.3) from 6.5 to 35.2 cm were harvested from the different aged stands. Biomasses of understory vegetation, forest floor and standing dead trees were also investigated. Total biomass carbon storages ranged from 57.6 to 211.4 Mg ha–1 in the different aged stands. Tree layer comprised from 93.7% to 96.4% of the total biomass C pools in the different aged stands. The C pools of the necromass were from 1.8 to 6.2 Mg ha–1. Stand age had a significant effect on tree biomass partitioning, with an increase in proportion of root biomass. The root/shoot ratios were from 0.187 to 0.312, which was significantly positively correlated to stand age. The existing plantation stands are still developing and have somewhat high rate of biomass and carbon accumulations beyond the normal rotation period (usually 25–30 years) even over an age of 50 years. Appropriate prolongation of the rotation period of Chinese fir plantation will be effective in maintaining long-term productivity and providing large carbon sink. The measurements provide valuable data for modelling productivity of Chinese fir plantation forest.

Źródło:

Dendrobiology; 2016, 76
1641-1307

Pojawia się w:

Dendrobiology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 92.

Tytuł:

Infrared small-target detection under a complex background based on a local gradient contrast method

Autorzy:

Yang, Linna
Xie, Tao
Liu, Mingxing
Zhang, Mingjiang
Qi, Shuaihui
Yang, Jungang

Powiązania:

https://bibliotekanauki.pl/articles/2201024.pdf

Data publikacji:

2023

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

small target detection
local gradient contrast
visual saliency
infrared image processing
kontrast lokalny
wyróżnienie wizualne
obrazowanie w podczerwieni

Opis:

Small target detection under a complex background has always been a hot and difficult problem in the field of image processing. Due to the factors such as a complex background and a low signal-to-noise ratio, the existing methods cannot robustly detect targets submerged in strong clutter and noise. In this paper, a local gradient contrast method (LGCM) is proposed. Firstly, the optimal scale for each pixel is obtained by calculating a multiscale salient map. Then, a subblockbased local gradient measure is designed; it can suppress strong clutter interference and pixel-sized noise simultaneously. Thirdly, the subblock-based local gradient measure and the salient map are utilized to construct the LGCM. Finally, an adaptive threshold is employed to extract the final detection result. Experimental results on six datasets demonstrate that the proposed method can discard clutters and yield superior results compared with state-of-the-art methods.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2023, 33, 1; 33--43
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 93.

Tytuł:

Analysis of socio-economic spatial structure of urban agglomeration in China based on spatial gradient and clustering

Autorzy:

He, Li
Tao, Jian’ge
Meng, Ping
Chen, Dan
Yan, Meng
Vasa, László

Powiązania:

https://bibliotekanauki.pl/articles/19233717.pdf

Data publikacji:

2021

Wydawca:

Instytut Badań Gospodarczych

Tematy:

economic and social development
urban agglomeration
Central Plains Urban Agglomeration (CPUA)
clustering
spatial gradient

Opis:

Research background: Previous studies on the economic and social development of urban agglomerations mostly focus on a single primacy comparative analysis and efficiency evaluation. Spatial structure differentiation is an important feature of urban agglomeration. The lack of economic and social analysis on the spatial structure makes it impossible to determine the development positioning of each city in the urban agglomeration, which affects the sustainable economic development ability of these areas. Purpose of the article: The objective of the article is to analyze the spatial development law and experience of urban agglomeration, this study explores the practice of economic and population spatial structure of city areas in China. For this purpose, CPUA and its central city Zhengzhou was taken as an example, the spatial gradient structure of example was analyzed. Methods: Using economic and population data of 32 cities in this region, growth pole theory, and pole-axis theory, the economic and population spatial structure of urban agglomeration, the spatial gradient structure of central cities in urban agglomerations were analyzed with the method of cluster about radiation index. Findings & value added: (1) In the process of the formation of CPUA, the geo-graphical spatial pattern plays a decisive role in economic and social development. This is an experience from developing countries. (2) CPUA presents a gradient development pattern with Zhengzhou as the center, and economic and social development gradually radiates to the metropolitan area, the core development area, and the character development demonstration area. (3) The economic and social gradients of Zhengzhou, the central city, present the hierarchy rules and characteristics which are driven by the Beijing-Guangzhou-Railway axis and the Longhai-Railway axis. (4) The central city of Zhengzhou still presents insufficient primacy in regional development, which shows that Zhengzhou accounts for 6% of the population of the Central Plains Economic Zone and 14% of GDP, and insufficient agglomeration. Different countries at different stages of economic development have different urban agglomeration development models. The conclusions from China provide new decision-making ideas and methods for spatial structure research and development strategy analysis of urban agglomerations.

Źródło:

Oeconomia Copernicana; 2021, 12, 3; 789-819
2083-1277

Pojawia się w:

Oeconomia Copernicana

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 94.

Tytuł:

Study on Tensile Properties and Microstructures of Different Sites in Al-Si Alloy Casting Component

Autorzy:

Tao, Jianquan
Xiang, Lin
Chen, Xidong
Sun, Jipeng
Wang, Yanbin
Du, Chuanhang
Peng, Feifei
Gao, Shiqing
Chen, Qiang

Powiązania:

https://bibliotekanauki.pl/articles/27765052.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

ZL114A alloy
plaster-mold casting
tensile properties
microstructure
fracture

Opis:

The tensile properties and microstructures of ZL114A alloy component with a complex shape are investigated at room temperature and 200°C, using the tensile tests, scanning electron microscopy and electron backscattering diffraction. Both thin wall and thick structure exhibit excellent properties, of which max ultimate tensile strength and elongation at break reach 314 MPa and 2.5% at room temperature, respectively. The ultimate tensile strengths of thin wall are 40 MPa and 25 MPa greater than those of thick structure at room temperature and 200°C, respectively. Moreover, the eutectic Si phases of thin wall exhibit a predominantly spherical morphology while of the morphology of thick structure are rod-like, resulting in the different mechanical properties between thin wall and thick structure. The fracture morphologies of thin wall and thick structure are studied to explain the difference in performance between thin wall and thick structure.

Źródło:

Archives of Metallurgy and Materials; 2023, 68, 2; 585--589
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 95.

Tytuł:

2-Connected Hamiltonian Claw-Free Graphs Involving Degree Sum of Adjacent Vertices

Autorzy:

Tian, Tao
Xiong, Liming

Powiązania:

https://bibliotekanauki.pl/articles/32034090.pdf

Data publikacji:

2020-02-01

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

Hamiltonian cycle
degree sum
dominating closed trail
closure

Opis:

For a graph H, define $\overline{\sigma}_2(H)=min\{d(u)+d(v)|uv∈E(H)\}$. Let $H$ be a 2-connected claw-free simple graph of order $n$ with \(\delta(H) ≥ 3\). In [J. Graph Theory 86 (2017) 193–212], Chen proved that if $\overline{\sigma}_2(H)≥\frac{n}{2}−1$ and $n$ is sufficiently large, then $H$ is Hamiltonian with two families of exceptions. In this paper, we refine the result. We focus on the condition $\overline{\sigma}_2(H)≥\frac{2n}{5}−1$, and characterize non-Hamiltonian 2-connected claw-free graphs $H$ of order $n$ sufficiently large with $\overline{\sigma}_2(H)≥\frac{2n}{5}−1$. As byproducts, we prove that there are exactly six graphs in the family of 2-edge-connected triangle-free graphs of order at most seven that have no spanning closed trail and give an improvement of a result of Veldman in [Discrete Math. 124 (1994) 229–239].

Źródło:

Discussiones Mathematicae Graph Theory; 2020, 40, 1; 85-106
2083-5892

Pojawia się w:

Discussiones Mathematicae Graph Theory

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 96.

Tytuł:

Characterized Microstructure and Electrical Properties of Hydrogenated Nanocrystalline Silicon Films by Raman and Electrical Conductivity Spectra

Autorzy:

Xiao-Yong, Gao
Jian-Tao, Zhao
Yu-Fen, Liu
Qing-Geng, Lin
Yong-Sheng, Chen
Jin-Hua, Gu
Shi-E, Yang
Jing-Xiao, Lu

Powiązania:

https://bibliotekanauki.pl/articles/1808127.pdf

Data publikacji:

2009-03

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

71.23.Cq
73.61.-r

Opis:

Microstructure and electrical properties of hydrogenated nanocrystalline silicon (nc-Si:H) film deposited on glass substrate at low temperature were characterized by average grain size, crystallinity, and dark electrical conductivity data obtained from the Raman and electrical conductivity spectroscopy, respectively. The average grain size, crystallinity and electrical conductivity have a similar change with substrate temperature. A threshold substrate temperature determined by silane concentration appears in their corresponding spectroscopy vs. substrate temperature. The dependence of crystallinity, average grain size and electrical conductivity on substrate temperature were accounted for by surface diffusion model and heterojunction quantum dot model, respectively.

Źródło:

Acta Physica Polonica A; 2009, 115, 3; 738-741
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 97.

Tytuł:

Effects of zero-valent iron and enzymes on the anaerobic co-digestion of sewage sludge and corn silage

Autorzy:

Zhou, Haidong
Cao, Zhengcao
Ying, Zhenxi
Liu, Jicheng
Hu, Tao
Zhang, Mingquan
Zhang, Jingyuan

Powiązania:

https://bibliotekanauki.pl/articles/2032872.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

corn silage
COD
sewage sludge
anaerobic digestion
kiszonka z kukurydzy
ChZT
osad ściekowy
beztlenowa fermentacja

Opis:

Anaerobic co-digestion of sewage sludge and corn silage with zero-valent iron powder (Fe0), cellulase, and papain as reinforcement means was conducted. COD-based feeding ratio of sewage sludge to corn silage was set to 2:1, the solids retention time (SRT) 20 day, digestion temperature 35 °C, and mixing speed 60 rpm. Removal rates of total COD during the control group, and Fe0, papain, cellulase, and papain, Fe0, and the two kinds of enzyme-added tests were 38.04, 41.02, 34.62, 34.55, 35.42, and 48.21%, respectively. The corresponding biogas production was 2.12, 2.62, 2.22, 2.41, 2.25, and 2.81 dm3/day, respectively. The results indicated the addition of cellulase, and papain could maximize the decomposition and hydrolysis of organic matter in sewage sludge and corn silage to volatile fatty acids. Fe0 could reduce the redox potentials of the anaerobic co-digestion, optimize the circumstances of the methanogenesis stage, accelerate biogas production, and improve biogas components. Fe0 and enzymes played a synergistic role in the anaerobic co-digestion system. Life cycle assessment indicated that the anaerobic co-digestion of sludge and corn silage co-substrates could benefit the economy, environment, and social development under the synergistic action of Fe0 and enzymes.

Źródło:

Environment Protection Engineering; 2020, 46, 4; 41-56
0324-8828

Pojawia się w:

Environment Protection Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 98.

Tytuł:

Effects of zero-valent iron and enzymes on the anaerobic co-digestion of sewage sludge and corn silage

Autorzy:

Zhou, Haidong
Cao, Zhengcao
Ying, Zhenxi
Liu, Jicheng
Hu, Tao
Zhang, Mingquan
Zhang, Jingyuan

Powiązania:

https://bibliotekanauki.pl/articles/2032890.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

corn silage
COD
sewage sludge
anaerobic digestion
kiszonka z kukurydzy
ChzT
osad ściekowy
beztlenowa fermentacja

Opis:

Anaerobic co-digestion of sewage sludge and corn silage with zero-valent iron powder (Fe0), cellulase, and papain as reinforcement means was conducted. COD-based feeding ratio of sewage sludge to corn silage was set to 2:1, the solids retention time (SRT) 20 day, digestion temperature 35 °C, and mixing speed 60 rpm. Removal rates of total COD during the control group, and Fe0, papain, cellulase, and papain, Fe0, and the two kinds of enzyme-added tests were 38.04, 41.02, 34.62, 34.55, 35.42, and 48.21%, respectively. The corresponding biogas production was 2.12, 2.62, 2.22, 2.41, 2.25, and 2.81 dm3/day, respectively. The results indicated the addition of cellulase, and papain could maximize the decomposition and hydrolysis of organic matter in sewage sludge and corn silage to volatile fatty acids. Fe0 could reduce the redox potentials of the anaerobic co-digestion, optimize the circumstances of the methanogenesis stage, accelerate biogas production, and improve biogas components. Fe0 and enzymes played a synergistic role in the anaerobic co-digestion system. Life cycle assessment indicated that the anaerobic co-digestion of sludge and corn silage co-substrates could benefit the economy, environment, and social development under the synergistic action of Fe0 and enzymes.

Źródło:

Environment Protection Engineering; 2020, 46, 4; 41-56
0324-8828

Pojawia się w:

Environment Protection Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 99.

Tytuł:

Thermal error modeling of spindle and dynamic machining accuracy reliability analysis of CNC machine tools based on IA and LHSMC

Autorzy:

Zhang, Ziling
Feng, Shuo
Ding, Yan
Mei, Xiao
Tao, Zhiqiang

Powiązania:

https://bibliotekanauki.pl/articles/2057984.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

electric spindle unit
thermal error
latin hypercube sampling monte carlo method
finite element simulation
machining accuracy reliability

Opis:

Machining accuracy reliability as a key index of CNC machine tools is seriously influenced by the geometric and thermal errors. In the paper, a spindle unit thermal error modeling and machining accuracy reliability analysis method is proposed. By analyzing the heat generation mechanism, a thermal error model was developed to describe the thermal deformation of the electric spindle. Based on the immune algorithm (IA), the heat generation power and the heat transfer coefficient were optimized, and the thermal error was obtained by finite element thermal-mechanical coupling. By adopting the multi-body system theory (MBS), a dynamic machining accuracy model was put forward including the geometric and thermal errors. Based on the Latin hypercube sampling Monte Carlo method (LHSMC), a machining accuracy reliability analysis method was proposed to characterize the machining accuracy reliability considering the geometric and thermal errors. The method was employed to a machine tool, and the experimental results indicate the verification and superiority of the method.

Źródło:

Eksploatacja i Niezawodność; 2022, 24, 1; 100--113
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 100.

Tytuł:

A numerical model for impacts of left-turn non-motorized vehicles on through lane capacity metrics

Autorzy:

He, Lieyun
Lin, Xinming
Liu, Qiang
Tao, Jason X,

Powiązania:

https://bibliotekanauki.pl/articles/1833648.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

traffic design
signalized intersection
permissive phase
traffic lane capacity
regression analysis
projektowanie ruchu
skrzyżowanie sygnalizowane
faza permisywna
przepustowość pasów ruchu
analiza regresji

Opis:

There is a conflict between through motor vehicles and the left-turn non-motorized vehicles, and the capacity of straight-line motor vehicles decreases. This study analyzes the impacts of left-turn non-motorized vehicles on the capacity of through motor vehicle lanes. A correction coefficient model for calculating the reduced capacity of through motor vehicle lanes has been developed based on analysis of the conflicting points at an intersection and the negative exponential function of traffic flow distribution. With consideration of intersection geometric design, channelization, and traffic characteristics, the cor-rection coefficient model was further enhanced by regression to capture the impacts of left-turn non-motorized vehicles from the same and the opposite directions. A simulation with VISSIM is used to validate the developed model. It shows that the calculated capacity from the correction coefficient model is close to the simulation results. The experiment indicates that the derived model is highly accurate in calculating the capacity of through motor vehicle lanes and has potential application for situations of mixed traffic in China. The study shows that the capacity of a through traffic lane at the permitted phase decreases with the increase of left-turning non-motorized vehicles, and the impact of left-turning non-motorized vehicles from the same direction is more significant. The results show that the traffic capacity of straight-line motor vehicle decreases with the increase of the left-turn non-motorized vehicles flow rate and the influence of the left-turn non-motor vehicle is more obvious. It is suggested that in practice, the correction coefficient of non-motor vehicle on the left turn should be 0.88, and the correction coefficient on the left turn should be 0.95, respectively. The study recommends coefficient values for both non-motorized vehicles from the same and opposite directions for use in real applications.

Źródło:

Archives of Transport; 2020, 55, 3; 7-16
0866-9546
2300-8830

Pojawia się w:

Archives of Transport

Dostawca treści:

Biblioteka Nauki

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