Skocz do pozycji: 1.

Tytuł:

Review of surgical robot development in China

Autorzy:

Zhao, Y.

Powiązania:

https://bibliotekanauki.pl/articles/2063849.pdf

Data publikacji:

2015

Wydawca:

Międzynarodowe Stowarzyszenie na rzecz Robotyki Medycznej

Tematy:

surgical robot
medical robot
China
robot chirurgiczny
robot medyczny
Chiny

Źródło:

Medical Robotics Reports; 2015, 4; 65--67
2299-7407

Pojawia się w:

Medical Robotics Reports

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

A continuous-time distributed algorithm for solving a class of decomposable nonconvex quadratic programming

Autorzy:

Zhao, Y.
Liu, Q.

Powiązania:

https://bibliotekanauki.pl/articles/91832.pdf

Data publikacji:

2018

Wydawca:

Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych

Tematy:

decomposable nonconvex quadratic programming
multi-agent network
consensus
Lyapunov method

Opis:

In this paper, a continuous-time distributed algorithm is presented to solve a class of decomposable quadratic programming problems. In the quadratic programming, even if the objective function is nonconvex, the algorithm can still perform well under an extra condition combining with the objective, constraint and coupling matrices. Inspired by recent advances in distributed optimization, the proposed continuous-time algorithm described by multi-agent network with consensus is designed and analyzed. In the network, each agent only accesses the local information of its own and from its neighbors, then all the agents in a connected network cooperatively find the optimal solution with consensus.

Źródło:

Journal of Artificial Intelligence and Soft Computing Research; 2018, 8, 4; 283-291
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: 3.

Tytuł:

Vibration reduction design with hybrid structures and topology optimization

Autorzy:

Huo, F.
Yang, D.
Zhao, Y.

Powiązania:

https://bibliotekanauki.pl/articles/260590.pdf

Data publikacji:

2016

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

hybrid structure
vibration reduction
materials selection
topology optimization

Opis:

The hybrid structures show excellent performance on vibration reduction for ship, aircraft and spacecraft designs. Meanwhile, the topology optimization is widely used for structure vibration reduction and weight control. The design of hybrid structures considering simultaneous materials selection and topology optimization are big challenges in theoretical study and engineering applications. In this paper, according to the proposed laminate component method (LCM) and solid isotropic microstructure with penalty (SIMP) method, the mathematical formulations are presented for concurrent materials selection and topology optimizations of hybrid structures. Thickness distributions of the plies in laminate components are defined as materials selection design variables by LCM method. Relative densities of elements in the components are defined as topology design variables by SIMP method. Design examples of hybrid 3-bar truss structures and hybrid floating raft with vibration reduction requirements verified the effectiveness of the presented optimization models.

Źródło:

Polish Maritime Research; 2016, S 1; 10-19
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Stochastic modelling and analysis of IMU sensor errors

Autorzy:

Zhao, Y.
Horemuz, M.
Sjöberg, L. E.

Powiązania:

https://bibliotekanauki.pl/articles/130312.pdf

Data publikacji:

2011

Wydawca:

Stowarzyszenie Geodetów Polskich

Tematy:

IMU
integration
accuracy
navigation
sensor
random
integracja
dokładność
nawigacja
czujnik

Opis:

The performance of a GPS/INS integration system is greatly determined by the ability of stand-alone INS system to determine position and attitude within GPS outage. The positional and attitude precision degrades rapidly during GPS outage due to INS sensor errors. With advantages of low price and volume, the Micro Electrical Mechanical Sensors (MEMS) have been wildly used in GPS/INS integration. Moreover, standalone MEMS can keep a reasonable positional precision only a few seconds due to systematic and random sensor errors. General stochastic error sources existing in inertial sensors can be modelled as (IEEE STD 647, 2006) Quantization Noise, Random Walk, Bias Instability, Rate Random Walk and Rate Ramp. Here we apply different methods to analyze the stochastic sensor errors, i.e. autoregressive modelling, Gauss-Markov process, Power Spectral Density and Allan Variance. Then the tests on a MEMS based inertial measurement unit were carried out with these methods. The results show that different methods give similar estimates of stochastic error model parameters. These values can be used further in the Kalman filter for better navigation accuracy and in the Doppler frequency estimate for faster acquisition after GPS signal outage.

Źródło:

Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2011, 22; 437-449
2083-2214
2391-9477

Pojawia się w:

Archiwum Fotogrametrii, Kartografii i Teledetekcji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Bench- and pilot-scale investigation of integrated removal of sulphur dioxide, nitrogen oxides and mercury in a wet limestone scrubber
Badania laboratoryjne i pilotowe nad zintegrowanym oczyszczaniem spalin z dwutlenku siarki, tlenków azotu i rtęci w układach mokrego odsiarczania spalin

Autorzy:

Krzyżyńska, R.
Zhao, Y.
Hutson, N. D.

Powiązania:

https://bibliotekanauki.pl/articles/1819582.pdf

Data publikacji:

2011

Wydawca:

Politechnika Koszalińska. Wydawnictwo Uczelniane

Tematy:

dwutlenek siarki
mokre odsiarczanie spalin
tlenki azotu
tlenki rtęci
sulfur dioxide
wet flue gas desulfurization
nitrogen oxides
oxides of mercury

Opis:

The reduction of sulphur dioxide (SO2), nitrogen oxides (NOx) and mercury (Hg) emissions is an important concern to environmental pollution. During recent years, the relevance of these pollutants to societal environmental issues and human health concerns has become increasingly apparent. Additionally, regulations such as the European Union directive on Large Combustion Plants (LCP, 2001/80/EC), the directive on Industrial Emissions (IED) and the United States Clean Air Transport Rule (CATR) require further emission reduction of these pollutants [5, 7, 19]. SO2, NOx and Hg are primarily released during coal combustion processes in the energy sector. Coal is main fuel of the Polish power sector - more than 90% of Polish power stations are coal-fired [13]. In the absence of national policies and binding international agreements concerning the limitation or reduction of greenhouse gas emissions, world coal consumption is projected to increase approximately 56% from 2007 to 2035 [11]. Increasing demand for energy to fuel electricity generation and industrial production in the region is expected to be met in large part by coal. Coal-fired generation increases by an annual average of 2.3%, making coal the second fastest-growing source for electricity generation in the IEA projection [11]. The environmental and health issues motivate the development of "clean coal technologies" with capture and sequestration of CO2, and also the development of flue gas cleaning technologies from coal-fired boilers. EU Directive LCP, became effective in 2016 and required to limit NOx and SO2 to 200 mg/Nm3 concentrations from large coal-fired boilers. This demands require a further investment in secondary methods of NOx cleaning, [7, 15] because commercially available primary methods of NOx reduction are not able to obtain these emission limits. United States Environmental Protection Agency has recently proposed the Clean Air Transport Rule (CATR) (to replace EPA's 2005 Clean Interstate Rule). CATR requires reduction of NOx and SO2 emissions - 71% for SO2 and 52% for NOx - from 2005 levels [5]. Because of these large emission reduction requirements, a significant increase in the use of wet-FGD technology is expected over the next decade. EPA has also indicated an intention to regulate emission of Hg and other hazardous air pollutants (HAPs) from coal-fired electric utility boilers [21]. Most Polish coal-fired utility boilers use the primary methods of NOx control, as low-NOx burners or the modification of combustion processes, but they are not able to reduce NOx emission to that required by the LCP directive level. Commercially available secondary methods of NOx control are selective catalytic reduction (SCR) using ammonia and selective non-catalytic reduction (SNCR) using urea. Additional methods of secondary NOx control are sorption methods and electro-beam technologies [4, 6, 20, 22]. Another option is multipollutant control, in which a minimum of two pollutants can be captured by one device. Different types of multipollutant control techniques have been intensively developed over the last several years [1, 4, 8÷10, 12, 14]. The concept of multipollutant control in a wet scrubber seems to be one of the most interesting and is the subject of intensive reseach [1, 8, 10, 12]. Wet scrubbers are the most popular flue gas desulphurization system worldwide, for example, in the US 86% of all installed flue gas desulphurization systems are wet scrubbed, and almost 70% of those wet scrubbers use the limestone process [17]. This paper presents results on the simultaneous removal of SO2 with NOx and Hg in a wet limestone scrubber. Experiments were performed at bench and pilot-scale on simulated coal-fired flue gas. Sodium chlorite, as the most effective among tested oxidant additives, was used in most experiments to enhance the effectiveenss of the wet limestone scrubber. The research is focused on achieving maximum NOx, Hg and SO2 removal efficiencies from flue gas, which may aid in the full fillment of regulatory requirements. Parameters that can affect the removal process and which might be present in real conditions are also examined.
Redukcja emisji dwutlenku siarki (SO2), tlenków azotu (NOx), a także rtęci (Hg) jest istotnym problemem ochrony środowiska. Związane jest to z coraz większą świadomością społeczeństwa o zagrożeniach, jakie niesie ze sobą zanieczyszczenie powietrza, troską o zdrowie oraz z dyrektywami unijnymi jak LCP-2001/80/EC, IED w Europie czy CATR w USA, które wymuszają dodatkowe ograniczenia tychże substancji [5, 6, 19]. Powyższe aspekty motywują do rozwoju tzw. "czystych technologii węglowych", a także technologii ograniczania emisji zanieczyszczeń z kotłów opalanych węglem. Dyrektywa LCP (Large Combustion Plants Directive) nakłada obowiązek oczyszczenia spalin z dużych obiektów energetycznych do poziomu 200 mg NOx/Nm3 i 200 mg SO2/Nm3 po 2016 r. [7]. Dyrektywa IED (Industrial Emissions Directive) dotycząca emisji przemysłowych, zaostrza jeszcze powyższe limity po roku 2016 (2020 w Polsce) [19]. Dyrektywy te praktycznie nakładają obowiązek modernizacji lub zainstalowania nowoczesnych, wysokosprawnych instalacji odsiarczania i odazotowania na większość polskich elektrowni [15]. Dlatego też, oprócz dalszego rozwoju komercyjnie dostępnych technologii takich jak SCR (Selektywna Redukcja Katalityczna) i SNCR (Nieselektywna Redukcja Katalityczna), opracowywane są również inne techniki oczyszczania spalin z NOx, do których należą m.in. techniki "multipollutant" (zintegrowanego oczyszczania), które są przedmiotem badań autorów niniejszej publikacji. W prezentowanych badaniach podjęto próbę opracowania metody redukcji emisji SO2, NOx i Hg w układach mokrego odsiarczania spalin. W artykule przedstawiono wyniki badań laboratoryjnych i pilotowych. Celem pracy było uzyskanie wysokich, redukcji emisji zanieczyszczeń oraz zbadanie i ustalenie optymalnych warunków prowadzenia procesu (stężenie jonów ClO2- w zawiesinie sorpcyjnej, wpływ SO2 i NOx w gazach spalinowych oraz pH cieczy sorpcyjnej). Badania przeprowadzono w skali laboratoryjnej i pilotowej na gazach Symulujących składem gazy spalinowe z procesu spalania węgla. Proces usuwania zanieczyszczeń przebiegał w absorberach symulujących mokre absorbery odsiarczania spalin, zasilanych wodną zawiesiną węglanu wapnia. Badania pilotowe przeprowadzono w absorberze trzykolumnowym z wieżą natleniającą Badania laboratoryjne wykazały bardzo wysoką skuteczność usuwania SO2, NOx i Hg ze spalin, przy niskim stężeniu ClO2- w zawiesinie sorpcyjnej (0.005M). Hg i NO zostały całkowicie usunięte ze spalin, natomiast absorpcja NOx (w postaci NO2) wynosiła ok. 50%. Większe stężenia ClO2- w zawiesinie nie wpływały na poprawę efektywności procesu. Wstępne badania pilotowe wykazały niższe, lecz obiecujące skuteczności usuwania zanieczyszczeń (~70% Hg, ~30% NO, ~15% NOx). Wykazano, że obecność SO2 w spalinach jest bardzo istotnym parametrem wpływających na skuteczność usuwania NOx (NO i NO2) i Hg. Z kolei brak SO2 w spalinach powodował drastyczny spadek skuteczności usuwania zanieczyszczeń. Wykazano, że niewielka ilość SO2 w gazach spalinowych jest niezbędna do uzyskania wysokich redukcji stężeń NOx (NO i NO2) i Hg, natomiast zbyt wysokie stężenie SO2 w spalinach powoduje dezaktywację reakcji Hg-NaClO2-NO-NaClO2 i wpływa negatywnie na sam proces oczyszczania. Udowodniono również, że chloryn sodu jest skutecznym związkiem utleniającym NO i Hg0 w absorberze w zakresie pH 4.0÷7.0.

Źródło:

Rocznik Ochrona Środowiska; 2011, Tom 13; 22-49
1506-218X

Pojawia się w:

Rocznik Ochrona Środowiska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Thermal conductivity of a Brown Earth soil as affected by biochars derived at different temperatures: Experiment and prediction with the Campbell model

Autorzy:

Zhao, B.
Li, L.
Zhao, Y.
Zhang, X.

Powiązania:

https://bibliotekanauki.pl/articles/2082959.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

biochar
bulk density
thermal conductivity
Brown Earth soil
Campbell model

Opis:

Thermal conductivity is a significant heat transfer property of soil. However, the influence of biochar on this property is not well known. In this research, the influence of corn straw biochars prepared at 300, 500 and 700oC on the thermal conductivity of a Brown Earth (Hapli-Udic Cambisol, FAO) soil and its prediction using a Campbell model was examined. The outcomes revealed that the bulk densities of the soil markedly decreased with increases in the biochar amendment rates of 1, 3, and 5% in linear patterns. The reduction in bulk density was mainly attributed to an increase in soil porosity and organic carbon content. With increasing volumetric water contents (10, 20, 30 and 40%), the thermal conductivity of the soils significantly increased, whereas those of soils with biochar amendment were obviously less than that of the CK and the differences increased with the biochar application rates. The pyrolysis temperature of biochar exhibited a negligible effect on the bulk density and thermal conductivity of soils at large. Combining the linear reduction of bulk density with the biochar amendment rate into the Campbell model, well-fitting results for the variation inthermal conductivity versus volumetric water content were obtained and accurate values could be predicted.

Źródło:

International Agrophysics; 2020, 34, 4; 433-439
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Specific emitter identification using geometric features of frequency drift curve

Autorzy:

Zhao, Y.
Wui, L.
Zhang, J.
Li, Y.

Powiązania:

https://bibliotekanauki.pl/articles/200575.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

specific emitter identification
geometric features
frequency drift
adaptive fractional spectrogram
support vector machine
emiter
cechy geometryczne
dryf częstotliwości
spektrogram

Opis:

Specific emitter identification (SEI) is a technique for recognizing different emitters of the same type which have the same modulation parameters. Using only the classic modulation parameters for recognition, one cannot distinguish different emitters of a same type. To solve the problem, new features urgently need to be developed for recognition. This paper focuses on the common phenomenon of frequency drift, defines geometric features of frequency drift curve and, finally, proposes a practical algorithm of specific emitter identification using the geometric features. The proposed algorithm consists of three processes: instantaneous frequency estimation based on the adaptive fractional spectrogram, feature extraction of frequency drift curve based on geometric methods for describing a curve and recognition process based on support vector machine. Simulation results show that the identification rate is generally more than 98% above –5 dB of signal to noise ratio (SNR), and real data experiment verifies the practical performance of the proposed algorithm.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 1; 99-108
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Experimental research on energy release characteristics of water-bearing sandstone alongshore wharf

Autorzy:

Wang, S.
Zhao, Y.
Zou, Z.
Jia, H.

Powiązania:

https://bibliotekanauki.pl/articles/258604.pdf

Data publikacji:

2017

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

sandstone
energy release
water content
confining pressure

Opis:

It is important to evaluate the deformation and failure of sandstone in the foundation engineering of coast, river bank and lake shore. While the deformation and failure of sandstone is a comprehensive result of energy release and dissipation, and energy release is the internal reason which leads to global failure of the sandstone. The experimental analysis is conducted on the character of energy revolution of the sandstone specimen by rating loading and unloading, and the catastrophe model is followed in analyzing elastic strain energy accumulation and release in rock deformation and failure. The index based on elastic energy release is proposed to assess the rock brittleness. It is found that increasing water content is to relieve energy release and catastrophe failure of the rock specimen, and weakening the capacity of elastic energy storage. The peak and residual values of elastic energy are raised as the confining pressure increases, and the post-peak released energy decreases progressively. The confining pressure strengthens energy storage and inhibits energy release of the rock specimen, and saturation of rock will weaken this inhibit effect. The brittleness index decreases with increasing confining pressure as the rock specimen transforming from brittle to ductile.

Źródło:

Polish Maritime Research; 2017, S 2; 147-153
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

A novel method to calculate the mechanical properties of cancer cells based on atomic force microscopy

Autorzy:

Zhang, T
Zhao, Y.
Tong, Z.
Guang, Y.

Powiązania:

https://bibliotekanauki.pl/articles/307289.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

właściwości mechaniczne
AFM
moduł Younga
cells’ mechanical properties
eliminating thermal drift
Young's modulus
differential Hertz’s model

Opis:

Purpose: Mechanical properties, as the inherent characteristics of cells, play a critical role in many essential physiological processes, including cell differentiation, migration, and growth. The mechanical properties of cells are one of the criteria that help to determine whether the tissue contains lesions at the single cell level, and it is very important for the early prevention and accurate diagnosis of diseases. Atomic force microscopy (AFM) makes it possible to measure the mechanical properties at single cell level in physiological state. This paper presents a novel method to calculate the mechanical properties of cancer cells more accurately through Atomic force microscopy. Methods: A new induced equation of Hertz’s model, called differential Hertz’s model, has been proposed to calculate the mechanical properties of cancer cells. Moreover, the substrate effect has also been effectively reduced through comparing the calculated mechanical properties of cell at different cell surface areas. Results: The results indicate that the method utilized to calculate the mechanical properties of cells can effectively eliminate the errors in calculation, caused by the thermal drift of AFM system and the substrate effect, and thus improve the calculation accuracy. Conclusion: The mechanical properties calculated by our method in this study are closer to the actual value. Thus, this method shows potential for use in establishing a standard library of Young’s modulus.

Źródło:

Acta of Bioengineering and Biomechanics; 2016, 18, 1; 19-24
1509-409X
2450-6303

Pojawia się w:

Acta of Bioengineering and Biomechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Effects of colloidal montmorillonite particles on froth flotation of graphite, galena and fluorite

Autorzy:

Chen, T.
Zhao, Y.
Li, H.
Song, S.

Powiązania:

https://bibliotekanauki.pl/articles/110589.pdf

Data publikacji:

2017

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

montmorillonite
graphite
galena
fluorite
slime coating
entrainment

Opis:

The effect of colloidal montmorillonite (MMT) on froth flotation of graphite, galena and fluorite was investigated in this work. The results showed that the presence of sufficient amount of colloidal MMT particles in the mineral slurry would be detrimental of flotation by reducing the recovery of minerals. This observation was attributed to slime coating of MMT on the coarse valuable mineral particles and entrainment of MMT particles in the froth product together with water in the triangle froth zones. The former would reduce the recovery of the valuable minerals because of hydrophilic MMT coating. The latter would decrease the concentrate grade. The degree of slime coating depended on slurry pH, while the degree of entrainment was closely related to water recovery. It was also found that slime coating was a dominant factor in mineral flotation in acidic pH regions in the presence of colloidal MMT particles.

Źródło:

Physicochemical Problems of Mineral Processing; 2017, 53, 2; 699-713
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Modeling the Bending and Recovery Behaviour of Woven Fabrics
Modelowanie zginania i odprężenia elastycznego tkanin

Autorzy:

Shi, F.
Zhao, Y.
Wu, G.
Zheng, D.

Powiązania:

https://bibliotekanauki.pl/articles/234385.pdf

Data publikacji:

2017

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych

Tematy:

wool
polyester fabrics
bending
viscoelasticity
rheological model
tkaniny wełniane
tkaniny poliestrowe
zginanie
lepkosprężystość
model reologiczny

Opis:

On the basis of viscoelastic theory of textile material, the viscoelastic solid model consisting of a spring element and viscous element either in series or parallel is one of the most useful research models to study the mechanical behaviour of fabrics. This paper presents a method to study the bending behaviour of wool/polyester fabrics using a model consisting of the three-element model in parallel with a sliding element on the assumption that the internal frictional moment is a constant during the bending processes. From the needs of practical study, a testing method has been presented to study the bending behaviour of wool/polyester fabrics using a KES-FB3 compression tester. A comparison and analysis of the experimental results and theoretical predictions indicate that the agreement between them is satisfactory.
Lepkosprężysty model bryłowy składający się z elementu sprężystego i elementu lepkiego, w układzie szeregowym lub równoległym, jest jednym z najbardziej użytecznych modeli służącym do badania mechanicznego zachowania się tkanin. W pracy przedstawiono metodę badania zachowania się zginanych tkanin wełniano-poliestrowych za pomocą modelu składającego się z trój-elementowego modelu równoległego z elementem przesuwnym przy założeniu, że wewnętrzny moment tarcia jest stały podczas procesów gięcia. Na podstawie praktycznych badań przedstawiono metodę badania zachowania się gięcia tkanin wełniano-poliestrowych przy użyciu testera kompresji KES-FB3. Stwierdzono zadowalającą zgodność między wynikami eksperymentów a przewidywaniami teoretycznymi.

Źródło:

Fibres & Textiles in Eastern Europe; 2017, 6 (126); 41-45
1230-3666
2300-7354

Pojawia się w:

Fibres & Textiles in Eastern Europe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

The Static Unbalance Analysis and Its Measurement System For Gimbals Axes of an Inertial Stabilization Platform

Autorzy:

Yang, H.
Zhao, Y.
Li, M.
Wu, F.

Powiązania:

https://bibliotekanauki.pl/articles/221513.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

inertial stabilization platform
mass eccentricity
angular position turntable
dynamical model
least-square fitting

Opis:

To reduce the influence of the static unbalance on an infrared missile guidance system, a new static unbalance measure system for the gimbals axes has been developed. Considering the coupling effects caused by a mass eccentricity, the static balance condition and measure sequence for each gimbal axis are obtained. A novel static unbalance test approach is proposed after analyzing the dynamic model of the measured gimbal axis. This approach is to drive the measured gimbal axis to do sinusoidal reciprocating motion in a small angle and collect its drive currents in real time. Then the static unbalance of the measured gimbal axis can be obtained by the current multi-cycle integration. Also a measuring system using the proposed approach has been developed. A balanced simulator is used to verify the proposed approach by the load and repeatability tests. The results show the proposed approach enhances the efficiency of the static unbalance measurement, and the developed measuring system is able to achieve a high precision with a greater stability.

Źródło:

Metrology and Measurement Systems; 2015, 22, 1; 51-68
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

A method to analyze the machining accuracy reliability sensitivity of machine tools based on Fast Markov Chain simulation
Podejście do analizy czułości niezawodnościowej dokładności obrabiarek oparte na symulacji metodą szybkich łańcuchów Markowa

Autorzy:

Cheng, Q.
Sun, B.
Zhao, Y.
Gu, P.

Powiązania:

https://bibliotekanauki.pl/articles/301814.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

machining accuracy reliability
machine tool
fast Markov Chain
reliability sensitivity analysis
integral of failure probability
niezawodność dokładności obróbki
obrabiarka
szybki łańcuch Markowa
analiza czułości niezawodnościowej
całka prawdopodobieństwa uszkodzenia

Opis:

With the ever increasing demand of higher machining accuracies, the machining accuracy reliability has evolved into an indicator to evaluate the performance of a machine tool. Consequentially, methods for improving the machining accuracy reliability have become the focus of attention for both manufacturers and users. Generally, the intercoupling geometric errors are the main cause which may lead to a reduction of the machining accuracy of machine tools. In this paper, the machining accuracy reliability is defined as the ability of a machine tool to perform at its specified machining accuracy under the stated conditions for a given period of time, and a new approach for analyzing the machining accuracy reliability of machine tools based on fast Markov chain simulations is proposed. Using this method, seven different failure modes could be determined for a machine tool. An analysis of the machining accuracy reliability sensitivity was performed based on solving the integral of the failure probability of the machine tool, and the key geometric errors which most strongly affect the machining accuracy reliability were identified. Finally, in this study, a 4-axis machine tool was selected as an example to experimentally validate the effectiveness of the proposed method.
Wraz z wciąż rosnącym zapotrzebowaniem na coraz to wyższą dokładność obróbki, niezawodność dokładności obróbki stała się wskaźnikiem pozwalającym na ocenę charakterystyk obrabiarek. W rezultacie, metody doskonalenia niezawodności dokładności obróbki znalazły się w centrum uwagi zarówno producentów jak i użytkowników tych maszyn. Na ogół, do zmniejszenia dokładności obróbki prowadzą nakładające się błędy geometryczne. W niniejszej pracy, niezawodność dokładności obróbki zdefiniowano jako zdolność obrabiarki do pracy z określoną dla niej dokładnością w zadanych warunkach przez dany okres czasu. Zaproponowano nowe podejście do analizy niezawodności dokładności obróbki oparte na symulacji metodą szybkich łańcuchów Markowa. Za pomocą tej metody, można ustalić siedem różnych przyczyn uszkodzeń obrabiarki. Analizę czułości niezawodnościowej dokładności obróbki przeprowadzono obliczając całkę prawdopodobieństwa uszkodzenia obrabiarki. Określono także kluczowe błędy geometryczne, które najsilniej wpływają na niezawodność dokładności obróbki. Wreszcie, efektywność proponowanej metody sprawdzono doświadczalnie na przykładzie obrabiarki czteroosiowej.

Źródło:

Eksploatacja i Niezawodność; 2016, 18, 4; 552-564
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Numerical simulation and experimental study on formation of high concentration of H2 generated by gas explosion.

Autorzy:

Lei, B.
Wu, B.
Zhao, Y.
Ashraf, M. A.

Powiązania:

https://bibliotekanauki.pl/articles/259802.pdf

Data publikacji:

2016

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

gas explosion
high concentration of H2
numerical simulation
explosion experiment

Opis:

In coal mine fire rescues, if the abnormal increase of gas concentration occurs, it is the primary thing to analyze the reasons and identify sources of the abnormal forming, which is also the basis of judge the combustion state of fire area and formulate proper fire reliefs. Nowadays, related researches have recognized the methane explosion as the source of high concentration of H2 formation, but there are few studies about the conditions and reaction mechanism of gas explosion generating high concentration of H2.Therefore, this paper uses the chemical kinetic calculation software, ChemKin, and the 20L spherical explosion experimental device to simulate the generating process and formation conditions of H2 in gas explosion. The experimental results show that: the decomposition of water vapor is the main base element reaction (R84) which leads to the generation of H2.The free radical H is the key factor to influence the formation of H2 generated from gas explosion. With the gradual increase of gas explosion concentration, the explosive reaction becomes more incomplete, and then the generating quantity of H2 increases gradually. Experimental results of 20L spherical explosion are consistent with the change trend about simulation results, which verifies the accuracy of simulation analysis. The results of explosion experiments show that when gas concentration is higher than 9%, the incomplete reaction of methane explosion increases which leads to the gradual increase of H2 formation

Źródło:

Polish Maritime Research; 2016, S 1; 131-137
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Mechanisms for the improved flotation of inherently hydrophobic graphite in electrolyte solution

Autorzy:

Lai, Q.
Liao, Y.
Liu, Z.
He, Y.
Zhao, Y.

Powiązania:

https://bibliotekanauki.pl/articles/110761.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

flotation
graphite
low-grade
electrolyte

Opis:

It is well documented that unavoidable ions in a pulp such as Mg2+, Ca2+, and K+ have a significant effect on the interaction for particles, especially for flotation of metallic sulfide minerals and clay minerals. In this study, the effect of electrolytes on the flotation of inherently hydrophobic mineral-graphite was studied. It was found that the zeta potential showed a dramatic decrease, and the reagent adsorption capacity of mineral enhanced in the present of electrolytes. The possible mechanism responsible for improved recovery was investigated by electrokinetic, surface tension and ions adsorption tests. It is likely that the hydrophobic force is stronger than the electrostatic force due to the reduced potential of graphite. This might be in favor of the formation of hydrophobic oil film leading to an increase in the graphite floatability. The experiments provided a new spectacle to study inherently hydrophobic mineral processing with electrolyte solution.

Źródło:

Physicochemical Problems of Mineral Processing; 2018, 54, 3; 944-954
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Erratum to: Quantifying soil hydraulic properties and their uncertainties by modified GLUE method

Autorzy:

Yan, Y.
Liu, J.
Zhang, J.
Li, X.
Zhao, Y.

Powiązania:

https://bibliotekanauki.pl/articles/26617.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Źródło:

International Agrophysics; 2018, 32, 2
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Modeling and analysis of 12-pulse inverter in shipboard or aircraft

Autorzy:

Che, Y.
Zhou, J.
Liu, G.
Xu, J.
Zhao, Y.

Powiązania:

https://bibliotekanauki.pl/articles/260236.pdf

Data publikacji:

2017

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

generalized state space averaging (GSSA)
state space averaging (SSA)
MATLAB

Opis:

With the development of DC distribution system within the isolated power system of a ship or an aircraft, more constant frequency loads will be supplied by inverters connected to DC main bus. In the operating mode conversion process of an isolated power system, inverters will inevitably suffer from serious disturbance and affect the stability of the system. Therefore, it is important to establish a model of the inverter that reflects its dynamic characteristics and based on which to conduct the stability analysis. This paper proposes a 12-pulse inverter model based on the generalized state space averaging (GSSA) method. This model can overcome the limitations of 12-pulse inverter state space averaging (SSA) model in transient analysis with good accuracy and fast analysis ability effectively. Three kinds of models for a 12-pulse aircraft inverter are built in MATLAB, namely GSSA model, SSA model and detail device model. The simulation results show the high accuracy of GSSA model in stability analysis. This study provides an effective analytical tool for stability analysis of 12-pulse inverter and also provides a reference for inverter modeling research of isolated power system such as in aircraft or ship.

Źródło:

Polish Maritime Research; 2017, S 3; 136-142
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Theoretical Studies on the Local Structure and Spin Hamiltonian Parameters for Single Cu²⁺ Ion in BaF₂

Autorzy:

Lin, J.
Xiao, P.
Zhao, Y.
Zhang, B.
Yang, Y.

Powiązania:

https://bibliotekanauki.pl/articles/1398965.pdf

Data publikacji:

2016-06

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

75.10.Dg
76.30.Fc

Opis:

The spin Hamiltonian parameters (g-factors and the hyperfine structure constants) and local structure are theoretically studied for single Cu²⁺ ion in BaF₂ from the high-order perturbation formulae of these parameters for 3d⁹ ions in tetragonally elongated octahedra. In the calculations, the ligand orbital and spin-orbit coupling of the impurity Cu²⁺ are taken into account, based on the cluster approach. Due to the Jahn-Teller effect and size mismatching substitution, the impurity Cu²⁺ is found to be located at a distance of about 0.2 Å from the nearest fluorine plane. The signs of the hyperfine structure constants $A_∥ $ and $ A_⊥ $ are suggested. The theoretical spin Hamiltonian parameters based on the above local structure are in good agreement with the observed values.

Źródło:

Acta Physica Polonica A; 2016, 129, 6; 1173-1177
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

The endomycorrhizal fungal species and their effects on the growth and nutrient characteristics of Eucalyptus maidenii seedlings in China

Autorzy:

Wang, X.
Kong, X.
Zhao, Y.
Cao, Y.
Cao, Z.

Powiązania:

https://bibliotekanauki.pl/articles/2077654.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Instytut Dendrologii PAN

Tematy:

Eucalyptus maidenii
endomycorrhizal fungi
major species

Opis:

Eucalyptus maidenii plantations are typically fertilized to increase the yields of eucalyptus oil and timber. However, the application of chemical fertilizers is costly and can cause environmental pollution and soil erosion. Mycorrhiza fungi can facilitate the cultivation of optimal seedlings while promoting the growth of trees. To date, investigations into the inoculation of endomycorrhizal fungi to enhance the productivity of E. maidenii in Yunnan, China have not been undertaken. The species/dominant species of endomycorrhizal fungi on E. maidenii in Yunnan were isolated and iden- tified. The effect of endomycorrhizal fungi on E. maidenii was elucidated. The major species of endomycor- rhizal fungi that affect E. maidenii were ascertained. Bulk soil was collected from an E. maidenii plantation, and the species of endomycorrhizal fungi were inves- tigated. The effect of the endomycorrhizal fungi on E. maidenii were analyzed via a single factor experimental design, where the number of spores of endomycorrhizal fungi in the seedling substrate were controlled. The major endomycorrhizal fungi species that affected E. maidenii were ascertained via stepwise regression analysis. Five endomycorrhizal fungal species were isolated from the bulk soil, with the dominant being Glomus ag- gregatum and Glomus mosseae. With higher counts of endomycorrhizal fungal spores in the seedling substrate, the infection rate and intensity of seedlings were observed to increase, as well as the NPK concentrations of the bulk soil. With the increased nitrogen concentration in the bulk soil, the nitrogen concentration of the aerial components of the seedlings also increased. The NPK concentrations in the bulk soil and seedlings, the second order lateral roots, the root activity, and the seedling height were significantly promoted by the presence of endomycorrhizal fungi (the third experimental treatment). The NPK concentrations of the bulk soil and seedlings, as well as the growth indices of seedlings increased through endomycorrhizal fungi inoculation. The major species of the endomycorrhizal fungi on E. maidenii were G. aggregatum, Glomus multicaule, and Claroideoglomus etunicatum.

Źródło:

Dendrobiology; 2020, 83; 68-74
1641-1307

Pojawia się w:

Dendrobiology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Applied research of U-shape ventilation network in underground mine
Badania stosowane w sieci wentylacyjnej w kształcie „U” w kopalni podziemnej

Autorzy:

Zhang, H.
Pera, L. S.
Carla, V. S.
Zhao, Y.

Powiązania:

https://bibliotekanauki.pl/articles/219698.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

eksperyment symulacyjny
wentylacja kopalni
prędkość przepływu
podobieństwo dynamiczne
simulation experiment
mine ventilation
wind velocity
dynamic similarity

Opis:

For the purpose of fully and systematically observe, research and optimize the U-sharp ventilation system in Vilafruns mine, a simulation model based on the principles of geometric, kinematic and dynamic similarity is established in the simulation laboratory. By simulating a U-shape ventilation network, t he air volume distribution and wind velocity in different sections of the model were measured and compared with practical data obtained in Vilafruns mine. Results show that the lowest wind velocity in the model is higher than 0.42 m/s, thus it is in a turbulent f low state, which satisfies the kinematical and dynamic similarity principles. T he characteristic of air volume distribution and wind velocity in Vilafruns mine are basically simulated by the experimental model through the obtained data and figures, which reflects the establishment of the model is correct and successful, and the experimental data is accurate and reliable. Moreover, this model provides useful references for the selection of mine ventilation types and for the optimization of the existing ventilation network.
W celu prowadzenia pełnej i systematycznej obserwacji, badań oraz optymalizacji sieci wentylacyjnej w kopalni Vilafruns, opracowano model do symulacji laboratoryjnych w oparciu o zasady podobieństwa geometrycznego, kinematycznego oraz dynamicznego. W ramach symulacji działania sieci wentylacyjnej w kształcie litery U, dokonano pomiarów rozkładu objętości powietrza oraz prędkości ruchu powietrza w różnych sekcjach modelu. Dane te porównano następnie z danymi rzeczywistymi uzyskanymi w kopalni Vilafruns. Wyniki pokazują, że najniższa prędkość przepływu powietrza w modelu przewyższa 0.42 m/s, mamy więc do czynienia z przepływem turbulentnym, w ten sposób spełnione są warunki podobieństwa kinematycznego i dynamicznego. Charakterystyka rozkładu objętości powietrza i prędkości przepływu w kopalni Vilafruns zasadniczo otrzymana została na podstawie modelu eksperymentalnego z wykorzystaniem uzyskanych wyników. Oznacza to, że zasadniczo model jest poprawny i skuteczny a dane eksperymentalne są dokładne i wiarygodne. Ponadto, model dostarcza nam cennych danych wyjściowych niezbędnych przy wyborze systemu wentylacji, a także przy optymalizacji istniejącej sieci wentylacyjnej.

Źródło:

Archives of Mining Sciences; 2014, 59, 2; 381-394
0860-7001

Pojawia się w:

Archives of Mining Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Rare Earth Elements supply vs. clean energy technologies: new problems to be solve
Dostawy pierwiastków ziem rzadkich (REE) a czyste technologie energetyczne: nowe problemy do rozwiązania

Autorzy:

Zhou, B.
Li, Z.
Zhao, Y.
Zhang, C.
Wei, Y.

Powiązania:

https://bibliotekanauki.pl/articles/216173.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN

Tematy:

rare earth element
clean energy technology
supply chain
pierwiastki ziem rzadkich
czysta technologia energetyczna
łańcuch dostaw

Opis:

Rare earth elements (REEs) provide important properties to clean energy technologies such as wind turbine and hybrid electric vehicles. The global REE demand will grow rapidly during the global transformation toward a greener economy in the next decades. This high demand will require a steady supply chain in the long run. China has a monopoly of global REE production and extraction. The global REE supply chain runs the risk of disruption along with Chinese REE policy evolution. To overcome this supply chain vulnerability, new strategies and measures should be adopted to satisfy future REE supply/demand. There is a pressing need to explore REE deposits, develop efficient REE recycling techniques from end-of-life products, improve substitution technologies for REEs, and reduce the number of critical REEs used in devices. Such measures are facing significant challenges due to environmental factors and an unbalanced market, and overcoming them requires efforts from government and REE companies.
Pierwiastki ziem rzadkich (Rare Earths Elements) mają istotne znaczenie dla rozwoju czystych technologii energetycznych, takich jak turbiny wiatrowe czy pojazdy hybrydowe. Światowy popyt na REE będzie wzrastał w związku z globalną transformacją w kierunku bardziej czystej (ekologicznej) gospodarki w okresie najbliższych dziesięcioleci. Wysoki popyt wymagać będzie stabilnego łańcucha dostaw REE w dłuższej perspektywie. Chiny mają monopol w zakresie globalnej produkcji i wydobycia REE. Światowe dostawy REE obarczone są jednak ryzykiem zakłóceń wynikających z chińskiej polityki w tym zakresie. W związku z tym, powinny być przyjęte nowe środki i strategie w celu zaspokojenia przyszłego popytu/podaży na REE. Istnieje pilna konieczność: poszukiwania nowych złóż, opracowania skutecznych technik recyklingu z wycofanych z eksploatacji produktów, poprawy technologii z zastosowaniem substytutów REE oraz zmniejszenie liczby krytycznych pierwiastków ziem rzadkich w stosowanych urządzeniach. Działania te stanowią poważne wyzwanie ze względu na czynniki środowiskowe i niezrównoważony rynek (monopol podaży). Przezwyciężenie ich wymaga odpowiednich działań ze strony rządu i firm zajmujących się produkcją REE.

Źródło:

Gospodarka Surowcami Mineralnymi; 2016, 32, 4; 29-44
0860-0953

Pojawia się w:

Gospodarka Surowcami Mineralnymi

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Calibration of backward-in-time model using drifting buoys in the East China Sea

Autorzy:

Yu, F.
Li, J.
Zhao, Y.
Li, Q.
Chen, G.

Powiązania:

https://bibliotekanauki.pl/articles/47533.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Instytut Oceanologii PAN

Tematy:

crude oil
marine environment
marine pollution
oil spill
China Sea
random walk
wind field
calibration

Opis:

In the process of oil exploitation and transportation, large amounts of crude oil are often spilled, resulting in serious pollution of the marine environment. Forecasting oil spill reverse trajectories to determine the exact oil spill sources is crucial for taking proactive and effective emergency measures. In this study, the backward-in-time model (BTM) is proposed for identifying sources of oil spills in the East China Sea. The wind, current and random walk are three major factors in the simulation of oil spill sources. The wind drag coefficient varies along with the uncertainty of the wind field, and the random walk is sensitive to various traits of different regions, these factors are taken as constants in most of the state-of-the-art studies. In this paper, a self-adaptive modification mechanism for drift factors is proposed, which depends on a data set derived from the drifter buoys deployed over the East China Sea shelf. It can be well adapted to the regional characteristics of different sea areas. The correlation factor between predicted positions and actual locations of the drifters is used to estimate optimal coefficients of the BTM. A comparison between the BTM and the traditional method is also made in this study. The results presented in this paper indicate that our method can be used to predict the actual specific spillage locations.

Źródło:

Oceanologia; 2017, 59, 3
0078-3234

Pojawia się w:

Oceanologia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Study of low temperature inactivation of spores using microwave excited air plasma

Autorzy:

Nagatsu, M.
Singh, M. K.
Zhao, Y.
Fujioka, Y.
Ogino, A.

Powiązania:

https://bibliotekanauki.pl/articles/385185.pdf

Data publikacji:

2009

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

plasma sterilization
low temperature plasma
microwave plasma
air plasma
VUV
radicals

Opis:

In the present study, we investigated the inactivation characteristics and contribution of different inactivating factors generated in a low temperature and low pressure nitrogen, oxygen and air-simulated plasma for the inactivation of Geobacillus stearothermophilus spores. We used three optical filters i.e. thin quartz (lambda>180 nm), lithium fluorine (LiF, lambda>120 nm) and Pyrex glass (lambda>300 nm) plates to identify the most efficient wavelength range. The effect of optical radiations alone was studied through placing a small isolated and evacuated chamber with spore sample inside the plasma chamber.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 108-111
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Numerical approach in recognition of selected features of rock structure from hybrid hydrocarbon reservoir samples based on microtomography

Autorzy:

Kaczmarek, Ł. D.
Zhao, Y.
Konietzky, H.
Wejrzanowski, T.
Maksimczuk, M.

Powiązania:

https://bibliotekanauki.pl/articles/178817.pdf

Data publikacji:

2017

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

compression test
flow paths
porosity
sandstone

Opis:

The study employs numerical calculations in the characterization of reservoir sandstone samples based on high-resolution X-ray computed microtomography. The major goals were to determine porosity through pore size distribution, permeability characterization through pressure field, and structure impact on rock strength by simulation of a uniaxial compression test. Two Miocene samples were taken from well S-3, located in the eastern part of the Carpathian Foredeep. Due to the relation between sample size and image resolution, two X-ray irradiation series with two different sample sizes were performed. In the first approach, the voxel side was 27 µm and in the second it was up to 2 µm. Two samples from different depths have been studied here. Sample 1 has petrophysical features of conventional reservoir deposits, in contrast to sample 2. The approximate grain size of sample 1 is in the range 0.1–1.0 mm, whereas for sample 2 it is 0.01–0.1 mm with clear sedimentation lamination and heterogenic structure. The porosity, as determined by µCT, of sample 1 is twice (10.3%) that of sample 2 (5.3%). The equivalent diameter of a majority of pores is less than 0.027 mm and their pore size distribution is unimodal right-hand asymmetrical in the case of both samples. In relations to numerical permeability tests, the flow paths are in the few privileged directions where the pressure is uniformly decreasing. Nevertheless, there are visible connections in sample 1, as is confirmed by the homogenous distribution of particles in the pore space of the sample and demonstrated in the particle flow simulations. The estimated permeability of the first sample is approximately four times higher than that of the second one. The uniaxial compression test demonstrated the huge impact of even minimal heterogeneity of samples in terms of micropores: 4–5 times loss of strength compared to the undisturbed sample. The procedure presented shows the promising combination of microstructural analysis and numerical simulations. More specific calculations of lab tests with analysis of variable boundary conditions should be performed in the future.

Źródło:

Studia Geotechnica et Mechanica; 2017, 39, 1; 13-26
0137-6365
2083-831X

Pojawia się w:

Studia Geotechnica et Mechanica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 25.

Tytuł:

Effect of the acrosome reaction on the efficiency of sperm-mediated DNA transfer

Autorzy:

Mu, Y.
Jiang, C.
Jiao, M.
Zhao, Y.
Lv, J.
Liu, Z.

Powiązania:

https://bibliotekanauki.pl/articles/2087625.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

spermatoza
SMGT
acrosome reaction
exogenous DNA

Źródło:

Polish Journal of Veterinary Sciences; 2018, 21, 4; 755-762
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Improving separation efficiency of 6-1 mm coal by introducing vibration energy to dense medium gas-solid fluidized bed

Autorzy:

He, J.
Zhao, Y.
Luo, Z.
Zhao, J.
Duan, C.
He, Y.

Powiązania:

https://bibliotekanauki.pl/articles/110018.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

vibration energy
dense medium gas-solid fluidized bed
fluidization quality
density uniformity
separation efficiency

Opis:

Effects of the vibration energy on the fluidization quality and separation performance of dense medium gas-solid fluidized bed were investigated experimentally. The magnetite powder with a wide size range of 0.3-0.074 mm was utilized as the basic medium solids. 6-1 mm fine coal sample from Yongcheng (China) was used to perform the separation experiments. The results indicate that the vibration amplitude A and superficial gas velocity U are greatly significant to the fluidization stability and the density distribution uniformity. Comparing with the bed without vibration, the optimal SP and Sρ values of 0.034 kPa and 0.018 g/cm3 are acquired in vibration bed with the operating factors of A = 1 mm, U = 1.8Umf, f = 15 Hz and Hs = 150 mm. The coal ash content was reduced from 27.84% to 9.50% at a separating density of 1.68 g/cm3 with a probable error E value of 0.505. The separation efficiency of 6-1mm fine coal is effectively improved by introducing vibration energy to dense medium gas-solid fluidized bed. The technology provides a novel approach to achieve high-efficiency separation of 6-1 mm fine coal in the arid and water-shortage areas.

Źródło:

Physicochemical Problems of Mineral Processing; 2015, 51, 1; 95-108
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Effects of irrigation and planting patterns on photosynthetic capacity and grain quality of winter wheat

Autorzy:

Zhao, Y.X.
Mao, X.M.
Yong, Y.Y.
Zhou, X.B.

Powiązania:

https://bibliotekanauki.pl/articles/2082531.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

Triticum aestivum L.
chlorophyll content index
dry matter weight
farinograph parameter

Opis:

With the shortage of water resources in recent years, water has become an important factor that limits the photosynthetic capacity and grain quality of winter wheat in the North China Plain. The experiment was conducted in 2011-2014, and the design of the two-factor split-plot was adopted, with three irrigation levels (0, 90, and 180 mm) for the main plot and three planting patterns (single-single row, single-double row, doubledouble row) for the subplot. The chlorophyll content index, net photosynthetic rate, and dry matter weight of winter wheat at different growth stages were measured, and the quality parameters of the grain were also measured after the harvest. The result indicated that irrigation increased the chlorophyll content index, net photosynthetic rate, grain protein, coarse starch and whiteness, which were favourable for producing dry matter and for seed formation. The chlorophyll content index, net photosynthetic rate, dry matter weight and gluten index of double-double row were higher than those of single-single row. Therefore, the 90 mm irrigation combined with the double-double row planting pattern is a good agronomic practice for winter wheat production, and beneficial for the improvement of flour quality in the North China Plain.

Źródło:

International Agrophysics; 2019, 33, 3; 313-321
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

A Simplified Approach for the Hydro-forming Process of Bi-metallic Composite Pipe

Autorzy:

Zheng, M.
Gao, H.
Teng, H.
Hu, J.
Tian, Z.
Zhao, Y.

Powiązania:

https://bibliotekanauki.pl/articles/355930.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metallic pipe
composite
hydroforming
pressure
residual stress

Opis:

In this article, it aims to propose effective approaches for hydro-forming process of bi-metallic composite pipe by assuming plane strain and elastic-perfectly plastic material model. It derives expressions for predicting hydro-forming pressure and residual stress of the forming process of bi-metallic composite pipe. Test data from available experiments is employed to check the model and formulas. It shows the reliability of the proposed model and formulas impersonally.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 2A; 879-883
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

An improved Otsu method for oil spill detection from SAR images

Autorzy:

Yu, F.
Sun, W.
Li, J.
Zhao, Y.
Zhang, Y.
Chen, G.

Powiązania:

https://bibliotekanauki.pl/articles/47553.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Instytut Oceanologii PAN

Tematy:

remote sensing
oil spill
detection
Otsu's method
accident
marine transport
synthetic aperture radar

Opis:

In recent years, oil spill accidents have become increasingly frequent due to the development of marine transportation and massive oil exploitation. At present, satellite remote sensing is the principal method used to monitor oil spills. Extracting the locations and extent of oil spill spots accurately in remote sensing images reaps significant benefits in terms of risk assessment and clean-up work. Nowadays the method of edge detection combined with threshold segmenta- tion (EDCTS) to extract oil information is becoming increasingly popular. However, the current method has some limitations in terms of accurately extracting oil spills in synthetic aperture radar (SAR) images, where heterogeneous background noise exists. In this study, we propose an adaptive mechanism based on Otsu method, which applies region growing combined with both edge detection and threshold segmentation (RGEDOM) to extract oil spills. Remote sensing images from the Bohai Sea on June 11, 2011 and the Gulf of Dalian on July 17, 2010 are utilized to validate the accuracy of our algorithm and the reliability of extraction results. In addition, results according to EDCTS are used as a comparator to further explore validity. The comparison with results according to EDCTS using the same dataset demonstrates that the proposed self-adapting algorithm is more robust and boasts high-accuracy. The accuracy computing by the adaptive algorithm is significantly improved compared with EDCTS and threshold method.

Źródło:

Oceanologia; 2017, 59, 3
0078-3234

Pojawia się w:

Oceanologia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

The cavitation nuclei transient characteristics of Lennard-Jones fluid in cavitation inception

Autorzy:

Fu, Q.
Zhang, B.
Zhao, Y.
Zhu, R.
Liu, G.
Li, M.

Powiązania:

https://bibliotekanauki.pl/articles/259255.pdf

Data publikacji:

2018

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

cavitation nuclei
molecular dynamics simulation
Lennard-Jones fluid
cavitation inception
nucleation

Opis:

In the field of ocean engineering, cavitation is widespread, for the study of cavitation nuclei transient characteristics in cavitation inception, we applied theoretical analysis and molecular dynamics (MD) simulation to study Lennard-Jones (L-J) fluid with different initial cavitation nuclei under the NVT-constant ensemble in this manuscript. The results showed that in cavitation inception, due to the decrease of liquid local pressure, the liquid molecules would enter the cavitation nuclei, which contributed to the growth of cavitation nuclei. By using molecular potential energy, it was found that the molecular potential energy was higher in cavitation nuclei part, while the liquid molecular potential energy changes greatly at the beginning of the cavitation nuclei growth. The density of the liquid and the surface layer changes more obvious, but density of vapor in the bubble changes inconspicuously. With the growth of cavitation nuclei, the RDF peak intensity increased, the peak width narrowed and the first valley moved inner. When cavitation nuclei initial size reduced, the peak intensity reduced, the corresponding rbin increased. With the decrease of the initial cavitation nuclei, the system pressure and total energy achieved a balance longer, and correspondingly, they were smaller. In addition, at the beginning of the cavitation nuclei growth, the total energy and system pressure changed greatly.

Źródło:

Polish Maritime Research; 2018, S 2; 75-84
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Regional features analysis of plugged holes of dense phase gas-solid separation fluidized bed

Autorzy:

Zhang, B.
Zhao, Y.
Luo, Z.
Song, S.
Duan, C.
Dong, L.

Powiązania:

https://bibliotekanauki.pl/articles/109699.pdf

Data publikacji:

2014

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

gas-solid fluidized bed for separation
pressure fluctuation
plugged holes regions
features analysis
plugged holes sensitivity

Opis:

In contrast to traditional coal separation, dry separation does not require water and does not cause water pollution. Dense phase gas–solid fluidized beds are used for dry separation. The plugged holes in the air distributor should be tested to ensure the stability of these beds for particle separation. The pressure fluctuation is sensitive to these plugged holes. This sensitivity can be tested and diagnosed by determining the standard deviation of the pressure fluctuation. In areas with partial blockage, that is the areas with weak fluidization, a decrease in the volume fraction of the particles and in the pressure differences in the transverse of the bed results in an increase of the standard deviation of the pressure fluctuation, thereby stimulating the lateral mixing of medium-sized particles. The standard deviation and the mixing intensity decrease axially. The value of sensitivity of the plugged holes in the air distributor decreases as the height of the bed increases. The features of air distributors affect the surrounding areas. The distribution law determining the influence of plugged holes on the beds is symmetrical. As the blockage of the fluidized bed distributor region increases, the mean square error of the pressure fluctuation in the related regions increases. The intensity of the effect is proportional to the distance to the plugged holes.

Źródło:

Physicochemical Problems of Mineral Processing; 2014, 50, 2; 667-679
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

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: 33.

Tytuł:

Polarization properties of Gaussian–Schell model quantization field in a turbulent marine-atmosphere

Autorzy:

Zhao, Y.
Xia, M.
Wang, Q.
Li, Y.
Hu, Z.
Sun, H.
Zhang, Y.

Powiązania:

https://bibliotekanauki.pl/articles/173639.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

polarization fluctuation
Gaussian–Schell model
marine-atmosphere
Kolmogorov turbulence

Opis:

Polarization properties of Gaussian–Schell model quantization field propagating through the Kolmogorov turbulence of a marine-atmosphere channel are studied based on the degree of quantum polarization. The effective photon annihilation and creation operators of Gaussian–Schell model quantization field propagation in a marine-atmosphere are developed by making use of the extended Huygens–Fresnel integral of quantum field. The effects of the outer scale on the degree of polarization can be neglected. As the source transverse coherent width, the number of received photons, the inner scale of turbulent eddies, and the source transverse radius decrease or the re- fractive index structure parameter increases, the degree of polarization decreases. In theory, we find that the polarization fade of marine-atmosphere turbulence channels is larger than that of terrene-atmosphere turbulence channels under same transport parameters and the channel with a stronger turbulence strength will possess a larger detection area of a polarization signal, which have potentially important implications for free-space quantum key distribution.

Źródło:

Optica Applicata; 2016, 46, 3; 335-345
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Molecular cloning, expression, purification and osteoblasts proliferation activity of sika deer thymosin beta10

Autorzy:

Zhao, D.
Zhao, Y.
Zhang, H.
Xu, Z.
Liu, M.
Wang, J.
Bai, X.

Powiązania:

https://bibliotekanauki.pl/articles/2087874.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

affinity chromatography
cell proliferation
prokaryotic expression
sika deer
thymosin 10

Źródło:

Polish Journal of Veterinary Sciences; 2017, 4; 751-758
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Comparative performance of three sampling techniques to detect airborne Salmonella species in poultry farms

Autorzy:

Adell, E.
Moset, V.
Zhao, Y.
Jimenez-Belenguer, A.
Cerisuelo, A.
Cambra-Lopez, M.

Powiązania:

https://bibliotekanauki.pl/articles/51993.pdf

Data publikacji:

2014

Wydawca:

Instytut Medycyny Wsi

Źródło:

Annals of Agricultural and Environmental Medicine; 2014, 21, 1
1232-1966

Pojawia się w:

Annals of Agricultural and Environmental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Improving spodumene flotation using a mixed cationic and anionic collector

Autorzy:

Wang, Y.
Zhu, G.
Yu, F.
Lu, D.
Wang, L.
Zhao, Y.
Zheng, H.

Powiązania:

https://bibliotekanauki.pl/articles/109883.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

spodumene
lithium
silicates
flotation
anionic surfactant
cationic surfactant

Opis:

Lithium, a rare-earth element, has been in increasing demand. Spodumene flotation is an important and challenging step for lithium extraction and production from lithium ore. In the present work, flotation tests for three pure minerals (i.e., spodumene, quartz and feldspar) and a real spodumene ore were carried out at laboratory scale. The results showed that YOA, a mixture of oleic acid and dodecylamine with the molar ration of 10:1, could be used as collector to produce a spodumene concentrate with grade of 5.59% Li2O from the feed ore with grade of 1.48% Li2O where 85.24% of Li2O was recovered to the concentrate. The measured zeta potential, contact angle and adsorption capacity indicated that YOA was preferentially adsorbed on spodumene instead of on quartz or feldspar, with the spodumene surface being more hydrophobic than that of feldspar or quartz. The adsorption energies of YOA on spodumene were calculated and the results provided insights into the superior flotation performance obtained in the present work.

Źródło:

Physicochemical Problems of Mineral Processing; 2018, 54, 2; 567-577
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Serological surveillance of avian influenza virus and canine distemper virus in captive Siberian Tigers in Northeastern China

Autorzy:

Wang, K.
Wang, H.
Feng, N.
Zhao, Y.
Gao, Y.
Hu, G.
Xia, X.

Powiązania:

https://bibliotekanauki.pl/articles/2087698.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

influenza A virus
canine distemper virus
serological
Siberian Tiger

Źródło:

Polish Journal of Veterinary Sciences; 2018, 21, 3; 491-495
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 38.

Tytuł:

Molecular cloning, recombinant expression, and purification of osteocalcin in sika deer (Cervus nippon) antler

Autorzy:

Li, X.
Liu, M.
Bai, X.
Li, Y.
Zhao, Y.
Wang, S.
Wang, J.

Powiązania:

https://bibliotekanauki.pl/articles/2087587.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Cervus nippon
osteocalcin
molecular cloning
expression
purification

Źródło:

Polish Journal of Veterinary Sciences; 2019, 1; 143-150
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 39.

Tytuł:

Natural filling and systematic roof control technology for gob-side entry retaining in steep coal seams
Naturalne podsadzanie stropu i metoda systemowego prowadzenia stropu przy utrzymaniu chodników przewozowych od strony zrobów w nachylonych pokładach węgla

Autorzy:

Yang, H.
Cao, S.
Zhou, G.
Zhao, Y.
Li, G.
Li, Y.
Fan, Y.

Powiązania:

https://bibliotekanauki.pl/articles/220162.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

utrzymanie chodnika przewozowego
nachylone pokłady węgla
naturalne podsadzanie
projekt systemowy
gob-side entry retaining
steep coal seams
natural filling
systematic project

Opis:

The technology for gob-side entry retaining in steep coal seams is still in the development stage. The analysis results of the caving structure of main roof, low influence of gateway’s stability because of long filling distance and weak dynamic effect of the gateway, and the low stress redistribution environment indicate that using this technology in steep coal seams has significant advantages. Moreover, to reinforce the waste rock and the soft floor and to better guard against the impact of the waste rock during natural filling, a rock blocking device and grouting reinforcement method were invented, and theoretical calculations result show that the blocking device has high safety factor. In addition, we also developed a set of hydraulic support devices for use in the strengthening support zone. Furthermore, because the retaining gateway was a systematic project, the selection of the size and shape of the gateway cross section and its support method during the initial driving stage is a key step. Thus, first, a section the size of bottom width and roof height of a new gateway was determined to meet any related requirements. Then, according to the cross sections of 75 statistical gateways and the support technique, it chosen a trapezoidal cross section when the dip of the coal seam is […], a special and an inclined arch cross section when […]. Eventually, a support system of bolts and cables combined with steel mesh and steel belts was provided. The support system used optimized material and improved parameters, can enhanced the self-bearing ability of the surrounding coal and rock masses.
Technologia utrzymywania chodników w obszarze zrobów w nachylonych pokładach węgla jest nadal rozwijana i udoskonalana. Jej zastosowanie prowadzi do zawału głównego stropu, który jednak w nieznacznym tylko stopniu wpływa na stabilność chodników z uwagi na odległość obszaru podsadzania, podczas gdy oddziaływania dynamiczne na chodniki przewozowe będą niewielkie. Powstały rozkład naprężeń wskazuje, że zastosowanie tej technologii w stromych pokładach przyniesie znaczne korzyści. Ponadto, w celu wzmocnienia warstw skał płonnych i miękkich warstw spągowych, a także dla lepszego zabezpieczenia przed skutkami ruchów skał płonnych w trakcie podsadzania, opracowano urządzenia blokujące ruch skał wraz ze wzmocnieniem cementowym. Obliczenia teoretyczne wskazują że zastosowana blokada ruchów skał charakteryzuje się wysokim wskaźnikiem bezpieczeństwa. Ponadto, opracowano także zestaw wsporników hydraulicznych dla dodatkowego wzmocnienia strefy podsadzania. Z uwagi na to, że zachowanie chodnika przewozowego jest działaniem stałym i systematycznym, dobór wymiarów i kształtu przekroju chodnika oraz metody jego stabilizacji jest sprawą kluczową już na etapie drążenia chodnika. W kroku pierwszym określono więc szerokość chodnika w jego dolnej części oraz wysokość stropu zgodnie z odpowiednimi wymogami. Następnie w oparciu o wymiary przekrojów 75 statystycznych chodników oraz uwzględniając dostępne techniki stabilizacji stropu wybrano przekrój trapezoidalny gdy nachylenie pokładu węgla mieści się w przedziale […], zaś dla kątów nachylenia w przedziale […] wybrano nachylony profil łukowy. W etapie końcowym zastosowano układ stabilizujący oparty na kotwach i kablach połączonych siatka stalową i stalowymi taśmami. W systemie stabilizującym wykorzystano zoptymalizowane materiały zapewniając lepsze parametry pracy, co korzystanie wpłynie na nośność warstw górotworu w otoczeniu pokładu węgla.

Źródło:

Archives of Mining Sciences; 2018, 63, 3; 599-616
0860-7001

Pojawia się w:

Archives of Mining Sciences

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 40.

Tytuł:

Dynamic analysis of embedded chains in mooring line for fish cage system

Autorzy:

Hou, H. M.
Dong, G. H.
Xu, T. J.
Zhao, Y. P.
Bi, C. W.

Powiązania:

https://bibliotekanauki.pl/articles/259892.pdf

Data publikacji:

2018

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

embedded chains
soil resistance
parameter sensitivity
dynamic analysis

Opis:

Investigation of the embedded chains in soil starts to play an important role in understanding the structural performance of mooring system, when the embedded anchors will be employed to sustain large loads with the gradually growth of installation depth of offshore aquaculture farm. The aim of this study is to investigate the dynamic response of mooring line considering the influence of embedded chains in clay soil for net cage system. Lumped-mass method is used to establish the numerical model for evaluating the performance of mooring line with embedded chains. To validate the numerical model, comparisons of numerical results with the analytical formulas and the experimental data are conducted. A good agreement of the profile and the tension response is obtained. Then, the effect of embedded chains on the static and dynamic response of mooring line is evaluated, and the dynamic behavior of mooring system considering embedded chains for net cage system is investigated. The results indicate that the soil resistance on embedded chains should be included to predict the mooring line development and the load on the embedded anchors in the numerical simulations. An appropriate safety factor should be included if employing the simplified model Case C at the initial design phase. And the effect of embedded chains on the holding capacity of embedded anchors in single-point mooring system for single net cage cannot be negligible during the design and operation phases. Consequently, it is profound to take into account the interaction of embedded chains and soil for accurately predicting the reliability of mooring system for fish cage.

Źródło:

Polish Maritime Research; 2018, 4; 83-97
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Chinese cabbage BrMYB34.2 transcription factor regulates indolic glucosinolates biosynthesis in Arabidopsis

Autorzy:

Zhao, Y.
Zhang, Y.
Guo, X.
Ma, Y.
Zhang, P.
Liu, H.
Liu, G.
Guo, J.

Powiązania:

https://bibliotekanauki.pl/articles/12705984.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie

Opis:

Glucosinolates (GS) are a group of sulfur- and nitrogen-rich plant secondary metabolites that originate from amino acids and exist mainly in plants in the order Brassicales, such as Arabidopsis thaliana (Arabidopsis) and Chinese cabbage (Brassica rapa ssp. pekinensis). To date, several regulatory components responsible for GS biosynthesis have been identified in Arabidopsis. However, the functions of GS biosynthesis regulators in Chinese cabbage have not been clarified. In our current study, a putative ATR1/MYB34 orthologous gene, BrMYB34.2, was isolated from Chinese cabbage leaves. To investigate the function of this gene, we engineered Arabidopsis plants that overexpress BrMYB34.2 ectopically and phenotypic analysis was performed. Moreover, we assayed the accumulation levels of indolic GS (IGS) and aliphatic glucosinolates in transgenic plants and test the expression of key genes of IGS biosynthesis and tryptophan synthesis by Real-time quantitative PCR. And further analysed the resistance of transgenic plants in 5MT stress treatment. The results indicate that ectopic expression of the BrMYB34.2 gene in Arabidopsis was able to up-regulate the accumulation level of IGS due to the increased expression of IGS and Trp biosynthetic genes. Moreover, overexpression of BrMYB34.2 conferred Arabidopsis 5MT resistance. These results suggest that the BrMYB34.2 gene may function as one of the regulators of IGS and Trp biosynthesis in Chinese cabbage.

Źródło:

Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 1; 85-95
1644-0692

Pojawia się w:

Acta Scientiarum Polonorum. Hortorum Cultus

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

A method for tracing exogenous DNA uptake in live spermatozoa and embryos

Autorzy:

Mu, Y.
Wang, J.
Liu, Z.
Zhao, Y.
Zhang, X.
Jiao, M.
Lv, J.
Hao, J.
Kong, Q.

Powiązania:

https://bibliotekanauki.pl/articles/2087751.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

spermatozoa
SMGT
exogenous DNA
IVF

Źródło:

Polish Journal of Veterinary Sciences; 2018, 21, 1; 193-202
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Identification of Ephedra species by phylogenetic analyses using matK and ITS1 sequences

Autorzy:

Zhao, Y.S.
Xie, L.X.
Mao, F.Y.
Cao, Z.
Wang, W.P.
Zhao, Q.P.
Zhang, X.H.

Powiązania:

https://bibliotekanauki.pl/articles/56673.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Botaniczne

Opis:

In this study, the species identifications of seven Ephedra plants, including three medicinal plants from the Pharmacopoeia of the People’s Republic of China, were conducted using phylogenetic analyses, and the method’s validity was verified. The phylogenetic trees constructed from the maturase-coding gene (matK) and internal transcribed spacer 1 (ITS1) sequences showed that the former could be used for identifying five Ephedra plants, Ephedra intermedia, E. equisetina, E. antisyphilitica, E. major, and E. aphylla, but it had less power to discriminate E. sinica and E. przewalskii, while the latter could distinguish five Ephedra plants, E. przewalskii, E. equisetina, E. antisyphilitica, E. major, and E. aphylla, but it had less power to discriminate E. sinica and E. intermedia. However, when the two genes were combined, the seven species could be completely distinguished from each other, especially the medicinal plants from the others, which is significant in developing their pharmaceutical uses and in performing quality control assessments of herbal medicines. The method presented here could be applied to the analysis of processed Ephedra plants and to the identification of the botanical origins of crude drugs. Additionally, we discovered that E. equisetina and E. major were probably closely related to each other, and that E. sinica, E. intermedia, and E. przewalskii also had a close genetic relationship.

Źródło:

Acta Societatis Botanicorum Poloniae; 2016, 85, 2
0001-6977
2083-9480

Pojawia się w:

Acta Societatis Botanicorum Poloniae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Advanced Deformation Stages in Duplex Steel Investigated using Neutron and Synchrotron Radiation

Autorzy:

Gadalińska, E.
Baczmański, A.
Zhao, Y.
Le Joncour, L.
Wroński, S.
Panicaud, B.
Francois, M.
Braham, C.
Buslaps, T.

Powiązania:

https://bibliotekanauki.pl/articles/97937.pdf

Data publikacji:

2016

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Lotnictwa

Tematy:

two-phases materials
mechanical behaviour
diffraction methods

Opis:

The grain scale of materials is an area still open for investigations within the field of materials science. The most helpful tools to perform this type of research are diffraction methods. Within the research project presented in this paper two experiments were carried out employing two different types of radiation: neutron (ISIS) and synchrotron (ESRF). The aim of the work was to describe the stress state in the necking zone during the occurrence of a damage phenomenon (Fig. 1.) in separate phase and to check the level of the homogeneity. The supplemental tools were the finite elements method and self-consistent modeling – it testified, confirmed and completed our experimental results and allowed us to formulate the justifiable conclusions.

Źródło:

Fatigue of Aircraft Structures; 2016, 8; 80-91
2081-7738
2300-7591

Pojawia się w:

Fatigue of Aircraft Structures

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Airborne virus sampling-efficiencies of samplers and their detection limits for infectious bursal disease virus (IBDV)

Autorzy:

Zhao, Y.
Aarmink, A.J.A.
Wang, W.
Fabri, T.
Groot Koerkamp, P.W.
de Jong, M.C.M.

Powiązania:

https://bibliotekanauki.pl/articles/51080.pdf

Data publikacji:

2014

Wydawca:

Instytut Medycyny Wsi

Opis:

Introduction. The airborne transmission of infectious diseases in livestock production is increasingly receiving research attention. Reliable techniques of air sampling are crucial to underpin the findings of such studies. This study evaluated the physical and biological efficiencies and detection limits of four samplers (Andersen 6-stage impactor, all-glass impinger “AGI-30”, OMNI-3000 and MD8 with gelatin filter) for collecting aerosols of infectious bursal disease virus (IBDV). Materials and Method. IBDV aerosols mixed with a physical tracer (uranine) were generated in an isolator, and then collected by the bioaerosol samplers. Samplers’ physical and biological efficiencies were derived based on the tracer concentration and the virus/tracer ratio, respectively. Detection limits for the samplers were estimated with the obtained efficiency data. Results. Physical efficiencies of the AGI-30 (96%) and the MD8 (100%) were significantly higher than that of the OMNI-3000 (60%). Biological efficiency of the OMNI-3000 (23%) was significantly lower than 100% (P < 0.01), indicating inactivation of airborne virus during sampling. The AGI-30, the Andersen impactor and the MD8 did not significantly inactivate virus during sampling. The 2-min detection limits of the samplers on airborne IBDV were 4.1 log10 50% egg infective dose (EID50) m-3 for the Andersen impactor, 3.3 log10 EID50 m-3 for the AGI-30, 2.5 log10 EID50 m-3 for the OMNI-3000, and 2.9 log10 EID50 m-3 for the MD8. The mean half-life of IBDV aerosolized at 20 °C and 70% was 11.9 min. Conclusion. Efficiencies of different samplers vary. Despite its relatively low sampling efficiency, the OMNI-3000 is suitable for use in environments with low viral concentrations because its high flow rate gives a low detection limit. With the 4 samplers investigated, negative air samples cannot guarantee virus-free aerial environments, which means that transmission of infectious agents between farms may still occur even when no virus has been detected.

Źródło:

Annals of Agricultural and Environmental Medicine; 2014, 21, 3
1232-1966

Pojawia się w:

Annals of Agricultural and Environmental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Free chlorine loss during spraying of membraneless acidic electrolyzed water and its antimicrobial effect on airborne bacteria from poultry house

Autorzy:

Zhao, Y.
Xin, H.
Zhao, D.
Zheng, W.
Tian, W.
Ma, H.
Liu, K.
Hu, H.
Wang, T.
Soupir, M.

Powiązania:

https://bibliotekanauki.pl/articles/49243.pdf

Data publikacji:

2014

Wydawca:

Instytut Medycyny Wsi

Źródło:

Annals of Agricultural and Environmental Medicine; 2014, 21, 2
1232-1966

Pojawia się w:

Annals of Agricultural and Environmental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

H2 and syngas production from catalytic cracking of pig manure and compost pyrolysis vapor over Ni-based catalysts

Autorzy:

Li, W.
Ren, J.
Zhao, X.-Y.
Takarada, T.

Powiązania:

https://bibliotekanauki.pl/articles/778243.pdf

Data publikacji:

2018

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

Catalytic gasification
Pig manure
Compost
Ni-based catalyst

Opis:

Catalytic cracking of volatiles derived from wet pig manure (WPM), dried pig manure and their compost was investigated over Ni/Al₂O₃  and Ni-loaded on lignite char (Ni/C). Non-catalytic pyrolysis of WPM resulted in a carbon conversion of 43.3% and 18.5% in heavy tar and light tar, respectively. No tar was formed when Ni/Al₂O₃  was introduced for WPM gasification and the gas yield significantly reached to a high value of 64.4 mmol/g at 650°C. When Ni/C was employed, 5.9% of carbon in the light tar was found at 650°C, revealing that the Ni/C is not active enough for cracking of tarry materials. The pyrolysis vapor was cracked completely and gave a H₂-rich tar free syngas in high yield. High water amount of WPM promotes steam gasification of char support, causing the deactivation of Ni/C. Such a study may be beneficial to the development of livestock manure catalytic gasification technology.

Źródło:

Polish Journal of Chemical Technology; 2018, 20, 3; 8-14
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Pharmacokinetics of the recombinant ovine interferon-tau in lambs

Autorzy:

Zhao, J.
Yu, H.Y.
Zhao, Y.
Li, S.Q.
Fu, X.L.
Zhou, W.
Xia, B.B.
Wang, M.L.
Chen, J.

Powiązania:

https://bibliotekanauki.pl/articles/2087588.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

bioavailability
ovine interferon-τ
cytopathic effect inhibition assay
pharmacokinetic study

Źródło:

Polish Journal of Veterinary Sciences; 2019, 1; 75-82
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Antibacterial spectrum of four compounds from yeasts in koumiss

Autorzy:

Chen, Y.J.
Du, C.G.
Guo, Y.Q.
Zhao, Y.F.
Aorigele, C.
Wang, C.J.
Simujide, H.
Aqima, W.
Zhang, X.Y.

Powiązania:

https://bibliotekanauki.pl/articles/2087160.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Kluyveromyces marxianus
Saccharomyces cerevisiae
Escherichia coli
minimum inhibition concentration
minimum bactericidal concentration

Źródło:

Polish Journal of Veterinary Sciences; 2021, 24, 2; 167-173
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Study of permeability of glass-sand soil
Badanie przepuszczalności gleby piaszczysto-szklistej

Autorzy:

Wang, F. C.
Feng, X. N.
Gong, H.
Zhao, H. Y.

Powiązania:

https://bibliotekanauki.pl/articles/231018.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

gleba piaszczysto-szklista
współczynnik przepuszczalności
proporcje
mieszanie szkła
stopień konsolidacji
glass-sand soil
permeability coefficient
proportions
glass mixing
consolidation degree

Opis:

The drainage consolidation method has been efficiently used to deal with soft ground improvement. Nowadays, it has been suggested to use a new sand soil which is a composite of sand and recycled glass waste. The permeability performance of glass-sand soil was explored to judge the feasibility of glass-sand soil backfilled in the drainage consolidation of sand-drained ground. For comparison purposes, different mix proportions of recycled glass waste, fineness modulus, and glass particle size were analyzed to certify the impact on the permeability coefficient and the degree of consolidation. The numerical results show that adding a proper amount of recycled glass waste could promote the permeability performance of glass-sand soil, and the glasssand soil drain could be consolidated more quickly than a sand drain. Experiments showed that glass-sand soil with the a 20% mix of recycled glass waste reveals the optimum performance of permeability.
W pracy omówiono nową mieszaninę gleby piaszczystej, która zawiera piasek i odpady pochodzące z recyklingu szkła. Skupiono się na wskaźniku przepuszczalności gleby piaszczysto-szklistej, aby ocenić wykonalność gleby piaszczystoszklistej w konsolidacji drenażu gruntu drenowanego piaskiem. Dla celów porównawczych przeprowadzono analizę różnych ilości zmieszanych odpadów pochodzących z recyklingu szkła, wskaźnika miałkości oraz wielkości cząstek szkła, aby potwierdzić wpływ na współczynnik przepuszczalności i stopień konsolidacji. Można przewidzieć, że dobra przepuszczalność części gleby zastąpionej szkłem w odpływie może przyspieszyć konsolidację drenażu fundamentu. Opracowano próbkę piasku przy użyciu piasku naturalnego o jednorodnym gatunku, z maksymalną wielkością nominalną wynoszącą 10 mm. W badaniu użyto pozostałości szkła laminowanego.

Źródło:

Archives of Civil Engineering; 2017, 63, 3; 175-190
1230-2945

Pojawia się w:

Archives of Civil Engineering

Dostawca treści:

Biblioteka Nauki

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