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Wyszukujesz frazę "Liu, Hong" wg kryterium: Autor

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    Wyświetlanie 1-30 z 30
    Tytuł:
    On some divisor problems
    Autorzy:
    Liu, Hong-Quan
    Powiązania:
    https://bibliotekanauki.pl/articles/1391580.pdf
    Data publikacji:
    1994
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Źródło:
    Acta Arithmetica; 1994, 68, 2; 193-200
    0065-1036
    Pojawia się w:
    Acta Arithmetica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the number of abelian groups of a given order (supplement)
    Autorzy:
    Liu, Hong-Quan
    Powiązania:
    https://bibliotekanauki.pl/articles/1391745.pdf
    Data publikacji:
    1993
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Opis:
    1. Introduction. The aim of this paper is to supply a still better result for the problem considered in [2]. Let A(x) denote the number of distinct abelian groups (up to isomorphism) of orders not exceeding x. We shall prove Theorem 1. For any ε > 0, $A(x) = C₁x + C₂x^{1/2} + C₃x^{1/3} + O(x^{50/199+ε})$, where C₁, C₂ and C₃ are constants given on page 261 of [2]. Note that 50/199=0.25125..., thus improving our previous exponent 40/159=0.25157... obtained in [2]. To prove Theorem 1, we shall proceed along the line of approach presented in [2]. The new tool here is an improved version of a result about enumerating certain lattice points due to E. Fouvry and H. Iwaniec (Proposition 2 of [1], which was listed as Lemma 6 in [2]).
    Źródło:
    Acta Arithmetica; 1993, 64, 3; 285-296
    0065-1036
    Pojawia się w:
    Acta Arithmetica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Emergence Angle on Acoustic Transmission in a Shallow Sea
    Autorzy:
    Lu, Yanyang
    Yang, Kunde
    Liu, Hong
    Huang, Chunlong
    Powiązania:
    https://bibliotekanauki.pl/articles/177665.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    underwater acoustic
    emergence angle
    transmission loss
    active sonar detection
    Opis:
    In this study, the effect of the emergence angle of a source array on acoustic transmission in a typical shallow sea is simulated and analyzed. The formula we derived for the received signal based on the Normal Mode indicates that the signal is determined by the beamform on the modes of all sources and the samplings of all modes at the receiving depth. Two characteristics of the optimal emergence angle (OEA) are obtained and explained utilizing the aforementioned derived formula. The observed distributions of transmission loss (TL) for different sources and receivers are consistent with the obtained characteristics. The results of this study are valuable for the development and design of active sonar detection.
    Źródło:
    Archives of Acoustics; 2020, 45, 1; 3-9
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of PCB-contaminated soil pretreatment remediation by hydroxypropyl-β-cyclodextrin (HP-β-CD)
    Autorzy:
    Liu, Xun
    Ding, Ning
    Liu, Hong
    Chen, Houwang
    Powiązania:
    https://bibliotekanauki.pl/articles/205038.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hydroxypropyl-β-cyclodextrin
    polychlorinated biphenyls
    contaminated soil
    eluting
    Opis:
    The present study thoroughly evaluated the eff ect of hydroxypropyl-β-cyclodextrin (HP-β-CD) on eluting of Aroclor1242 (one kind of PCBs (polychlorinated biphenyls)) from contaminated soil. The factors that might aff ect eluting effi ciency including HP-β-CD concentration, contact time, eluting cycles, temperature, pH, salt content, humic acid, and ultrasonic were all tested to evaluate the PCBs eluting effi ciency by HP-β-CD. Results indicated that Aroclor1242 can be eluted eff ectively from soil by HP-β-CD solution, 81% of Aroclor1242 was eluted from soil by 50 g/L of HP-β-CD solution after three cycles eluting, and the eluting effi ciency was improved by increasing temperature and with ultrasonic. Furthermore, it was shown that the humic acid and extreme acidic/alkaline condition both decreased the eluting effi ciency. In addition, column eluting experiment was conducted to simulate the practical HP-β-CD eluting of Aroclor1242 from contaminated soil, 18% of the PCBs was eluted from the soil column by 10 g/L of HP-β-CD. Overall, the results indicated the high extract power of HP-β-CD toward PCBs polluted soil and potential use of HP-β-CD for in situ remediation of PCBs contaminated soils.
    Źródło:
    Archives of Environmental Protection; 2020, 46, 1; 53-61
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Review of Carbon Emission and Carbon Neutrality in the Life Cycle of Silk Products
    Autorzy:
    Liu, Shuyi
    Liu, Hong
    Meng, Yudong
    Li, Qizheng
    Wang, Laili
    Powiązania:
    https://bibliotekanauki.pl/articles/2171952.pdf
    Data publikacji:
    2022
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    carbon footprint
    carbon neutrality
    silk product
    life cycle
    Opis:
    Silk is a distinctive and significant category of natural structural protein fiber. With a remarkable structure and versatility, silk has emerged as a topic of scientific study perennially because of its chemical, physical and biological properties. Meanwhile, in order to have an omnifaceted understanding of silk, the environmental performance of silk production is also worthy of attention. With the concern of global warming, efforts are increasingly focused on understanding and addressing carbon emission in the life cycle of silk products. However, the majority of current studies give priority to the carbon emission of either just one or a few stages of silk products’ life cycle, or to a specific type of silk product. On the basis of a review of literature on the life cycle assessment of silk products, this study presents a full-scale review of the quantification of the carbon emission and carbon neutrality of cocoon acquisition, industrial production of silk products, distribution, consumption, and recycling. The analysis revealed that the carbon sequestration by photosynthesis at the stage of cocoon acquisition could not be ignored. It is of importance to establish complete and unified system boundaries when quantifying carbon emissions in the industrial production of silk products. Reasonable models of washing times and washing modes are needed to assess carbon emissions in the domestic laundry of silk products. At the end of life phase of silk products, the positive impact on carbon emission in the phase of silk recycling is noteworthy. This study will help interested scholars, manufacturers and consumers to gain an in-depth understanding of the carbon emissions and carbon neutrality of silk products, and it is also of great value for exploring new production processes for reducing carbon emissions of silk products.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2022, 2 (151); 1--7
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carbon Footprint and Water Footprint of Cashmere Fabrics
    Ślad węglowy i ślad wodny tkanin kaszmirowych
    Autorzy:
    Chen, Bilin
    Qian, Weiran
    Yang, Yiduo
    Liu, Hong
    Wang, Laili
    Powiązania:
    https://bibliotekanauki.pl/articles/1857715.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    cashmere fabrics
    carbon footprint
    water footprint
    environmental impact
    tkanina kaszmirowa
    ślad węglowy
    ślad wodny
    wpływ na środowisko
    Opis:
    Given the serious problems of climate change, water shortage and water pollution, researchers have paid increasing attention to the concepts of the carbon footprint and water footprint as useful indices to quantify and evaluate the environmental impacts of the textile industry. In this study, assessment of the carbon footprints and water footprints of ten kinds of cashmere fabrics was conducted based on the PAS 2050 specification, the Water Footprint Network approach and the ISO 14046 standard. The results showed that knitted cashmere fabrics had a greater carbon footprint than woven cashmere fabrics. Contrarily, woven cashmere fabrics had a greater water footprint than knitted cashmere fabrics. The blue water footprint, grey water footprint and water scarcity footprint of combed sliver dyed woven cashmere fabric were the largest among the ten kinds of cashmere fabrics. The main pollutants that caused the grey water footprints of cashmere fabrics were total phosphorus (TP), chlorine dioxide, hexavalent chromium (Cr (VI)) and sulfide. The leading contributors to the water eutrophication footprint were total nitrogen, ammonia nitrogen, chemical oxygen demand and TP. These typical pollutants contributed 39% ~ 48%, 23% ~ 28%, 12% ~ 24% and 12% ~ 14% to each cashmere product’s water eutrophication footprint, respectively. The leading contributors to the water ecotoxicity footprint were aniline, Cr (VI) and absorbable organic halogens discharged in the dyeing and finishing process.
    Biorąc pod uwagę poważne problemy związane ze zmianą klimatu, niedoborem i zanieczyszczeniem wody, naukowcy zwracają coraz większą uwagę na koncepcje śladu węglowego i śladu wodnego jako użytecznych wskaźników do ilościowego określenia i oceny wpływu przemysłu włókienniczego na środowisko. W pracy dokonano oceny śladów węglowych i wodnych dziesięciu rodzajów tkanin kaszmirowych w oparciu o specyfikację PAS 2050, podejście Water Footprint Network oraz normę ISO 14046. Wyniki pokazały, że dzianiny kaszmirowe miały większy ślad węglowy, niż tkaniny kaszmirowe. Natomiast, tkaniny kaszmirowe miały większy ślad wodny niż dzianiny kaszmirowe. Ślad wody niebieskiej, ślad wody szarej i ślad niedoboru wody czesanej tkaniny kaszmirowej barwionej na kolor srebrny były największe wśród dziesięciu rodzajów tkanin kaszmirowych. Głównymi zanieczyszczeniami, które powodowały ślady szarej wody na tkaninach kaszmirowych, były fosfor całkowity (TP), dwutlenek chloru, chrom sześciowartościowy (Cr (VI)) oraz siarczki. Głównymi czynnikami przyczyniającymi się do śladu eutrofizacji wody były azot całkowity, azot amonowy, chemiczne zapotrzebowanie na tlen i TP. Te typowe zanieczyszczenia przyczyniły się odpowiednio 39% ~ 48%, 23% ~ 28%, 12% ~ 24% i 12% ~ 14% do śladu eutrofizacji wody każdego produktu z kaszmiru. Głównymi czynnikami wpływającymi na ślad ekotoksyczności wody były anilina, Cr (VI) i absorbowalne halogenki organiczne uwalniane w procesie barwienia i wykańczania.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2021, 4 (148); 94-99
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Maximizing Spectral Radii of Uniform Hypergraphs with Few Edges
    Autorzy:
    Fan, Yi-Zheng
    Tan, Ying-Ying
    Peng, Xi-Xi
    Liu, An-Hong
    Powiązania:
    https://bibliotekanauki.pl/articles/31340758.pdf
    Data publikacji:
    2016-11-01
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    tensor
    spectral radius
    unicyclic hypergraph
    bicyclic hypergraph
    girth
    Opis:
    In this paper we investigate the hypergraphs whose spectral radii attain the maximum among all uniform hypergraphs with given number of edges. In particular we characterize the hypergraph(s) with maximum spectral radius over all unicyclic hypergraphs, linear or power unicyclic hypergraphs with given girth, linear or power bicyclic hypergraphs, respectively.
    Źródło:
    Discussiones Mathematicae Graph Theory; 2016, 36, 4; 845-856
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Graphene Polymer Composites: Art of Review on Fabrication Method, Properties, and Future Perspectives
    Autorzy:
    Niyobuhungiro, Daniel
    Hong, Liu
    Powiązania:
    https://bibliotekanauki.pl/articles/2024186.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    graphene
    graphene polymer composites
    fabrication
    properties
    grafen
    kompozyty polimerowe z grafenem
    wytwarzanie
    właściwości
    Opis:
    Graphene has shown unique properties and introduced new challenges to light materials applicable in different areas. In addition to the polymer, it has brought materials with marvelous properties: mechanical, electrical, thermal, and related to conductivity. Different methods were discovered to produce good nanocomposites. This review summarized those methods, as well as discussed the properties of graphene combined with different kinds of polymers. Furthermore, the different factors affecting graphene reinforced polymer nanocomposites were studied. In the end, the challenges and future prospects for graphene polymer nanocomposites were considered.
    Źródło:
    Advances in Science and Technology. Research Journal; 2021, 15, 1; 37-49
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Global behavior of a multi-group SEIR epidemic model with spatial diffusion in a heterogeneous environment
    Autorzy:
    Liu, Pengyan
    Li, Hong-Xu
    Powiązania:
    https://bibliotekanauki.pl/articles/2134056.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    global stability
    multigroup epidemic model
    spatial heterogeneity
    spatial diffusion
    globalna stabilność
    wielogrupowy model epidemii
    różnorodność przestrzenna
    dyfuzja przestrzenna
    Opis:
    In this paper, we propose a multi-group SEIR epidemic model with spatial diffusion, where the model parameters are spatially heterogeneous. The positivity and ultimate boundedness of the solution, as well as the existence of a global attractor of the associated solution semiflow, are established. The definition of the basic reproduction number is given by utilizing the next generation operator approach, whereby threshold-type results on the global dynamics in terms of this number are established. That is, when the basic reproduction number is less than one, the disease-free steady state is globally asymptotically stable, while if it is greater than one, uniform persistence of this model is proved. Finally, the feasibility of the main theoretical results is shown with the aid of numerical examples for a model with two groups.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2022, 32, 2; 271--283
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure and properties of ZrO2 ceramic and Ti-6A-4V alloy vacuum brazed by Ti-28Ni filler metal
    Mikrostruktura i właściwości złącza ceramiki Zr02 i stopu Ti-6A-4V lutowanego próżniowo spoiwem Ti-28Ni
    Autorzy:
    Li, Hong
    Liu, Xuan
    Huang, Haixin
    Powiązania:
    https://bibliotekanauki.pl/articles/115028.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    ceramika ZrO2
    stop Ti-6A-4V
    lutowanie próżniowe
    mikrostruktura
    połączenie
    właściwości mechaniczne
    ZrO2 ceramic
    Ti-6A-4V alloy
    vacuum brazing
    interface microstructure
    mechanical properties
    Opis:
    Reliable ceramics/metal joints have an extensive application in the aerospace and biomedical area. However, ZrO2 ceramic has not been investigated systematically compared to the Si3N4 and Al2O3 ceramic. Therefore, successful brazing of ZrO2 ceramic and Ti-6A-4V alloy was achieved by using a binary active Ti-28Ni filler metal in this paper. The effect of holding time on the microstructure of ZrO2 ceramic/filler metal interface and mechanical properties of brazed joints was investigated. The results indicated that the representative interfacial microstructure was ZrO2 ceramic/Ti2O/Ni2Ti4O/Ti-rich phase/ Ti2Ni+α-Ti. With the increase of holding time, the thickness of Ti-rich layer in the interface of ZrO2/Ti-6Al-4V joint decreased obviously due to the diffusion of Ti atoms. Substantial brittle intermetallic compounds Ti2Ni and Ni2Ti4O were formed in the joint, which were detrimental to the mechanical properties of the brazed joints. The maximum shear strength of joint was 112.7 MPa when brazed at 1060 °C for 10 min.
    Niezawodne połączenia ceramiki/metalu mają szerokie zastosowanie w przemyśle lotniczym i biomedycznym. Jednak ceramika Zr02 nie była badana systematycznie w porównaniu z ceramiką Si3N4 i Al2O3. W niniejszym artykule przeprowadzono udany proces lutowania ceramiki Zr02 i stopu Ti-6A-4V, który został osiągnięty dzięki zastosowaniu binarnie aktywnego metalu wypełniającego Ti-28Ni. Zbadano wpływ czasu trwania połączenia na mikrostrukturę powierzchni ceramicznej/metalu wypełniającego ZrO2 oraz właściwości mechaniczne lutowanych połączeń. Wyniki wskazują, że reprezentatywną mikrostrukturą międzyfazową była ceramika ZrO2/Ti2O/Ni2Ti4O/faza bogata w Ti/Ti2Ni+α-Ti. Wraz ze wzrostem czasu trwania połączenia, grubość warstwy bogatej w Ti w interfejsie złącza ZrO2/Ti-6AI-4V zmniejszyła się z powodu dyfuzji atomów Ti. W spoinie powstały znaczne kruche związki międzymetaliczne Ti2Ni i Ni2Ti4O, które były szkodliwe dla właściwości mechanicznych lutowanych połączeń. Maksymalna wytrzymałość złącza na ścinanie wynosiła 112,7 MPa po lutowaniu w 1060 °C przez 10 min.
    Źródło:
    Welding Technology Review; 2019, 91, 10; 35-41
    0033-2364
    2449-7959
    Pojawia się w:
    Welding Technology Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal performance analysis of manned airships in a thermally variable environment
    Autorzy:
    Shi, Hong
    Liu, Meinan
    Chen, Jiamin
    Zou, Yitao
    Powiązania:
    https://bibliotekanauki.pl/articles/2173708.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    manned airship
    thermal performance
    nacelle
    temperature difference
    flight position
    sterowiec załogowy
    wydajność cieplna
    gondola
    różnica temperatur
    pozycja lotu
    Opis:
    The safety and reliability of the manned airship depend to a considerable extent on its thermal performance. In this paper, heat balance equations are developed and solved in the C++ programming language. The temperature variation of the enclosure, gasbag, and nacelles of the manned airship is investigated. In addition, the effects of season, latitude, and orientation on the thermal performance of the manned airship and the airship nacelle are investigated. The results show that: (1) The average temperature difference of the nacelle surface at the same time is 25 K, while the maximum temperature difference in the nacelle is 29 K during the day, (2) the temperature distribution in the nacelle is similar in spring and autumn, with maximum temperature between 306 K and 309 K. The maximum temperature in the nacelle is between 300 K and 303 K in winter while the maximum temperature in the nacelles is between 309 K and 315 K in summer, (3) as the flight position of the manned airship changes from 20°N to 60°N, the average nacelle temperature varies slightly by about 1 K. However, as the latitude increases, the high- temperature region shifts from the bottom of the nacelle to the side of the nacelle, and (4) the temperature distribution of the upper envelope of the airship varies considerably with orientation. However, the average temperature of the nacelle is less impacted by orientation. These results are useful for understanding the thermal performance of manned airships.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 5; art. no. e143105
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Laplacian spectrum of some digraphs obtained from the wheel
    Autorzy:
    Su, Li
    Li, Hong-Hai
    Zheng, Liu-Rong
    Powiązania:
    https://bibliotekanauki.pl/articles/743220.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    digraph
    Laplacian matrix
    eigenvalue
    wheel
    Opis:
    The problem of distinguishing, in terms of graph topology, digraphs with real and partially non-real Laplacian spectra is important for applications. Motivated by the question posed in [R. Agaev, P. Chebotarev, Which digraphs with rings structure are essentially cyclic?, Adv. in Appl. Math. 45 (2010), 232-251], in this paper we completely list the Laplacian eigenvalues of some digraphs obtained from the wheel digraph by deleting some arcs.
    Źródło:
    Discussiones Mathematicae Graph Theory; 2012, 32, 2; 255-261
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical study of the ejection cooling mechanism of ventilation for a marine gas turbine enclosure
    Autorzy:
    Shi, Hong
    Zhang, Qianwei
    Liu, Meinan
    Yang, Kaijie
    Yuan, Jie
    Powiązania:
    https://bibliotekanauki.pl/articles/32908258.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    gas turbine enclosure
    ejecting cooling
    ventilation
    CFD
    Opis:
    A marine gas turbine enclosure must be designed to prevent overheating of the electrical and engine control components as well as diluting potential fuel leaks. In order to achieve an optimal enclosure design, a numerical study of the ventilation-ejection cooling mechanism of a gas turbine enclosure is carried out in this paper. The evaluation index of the ejection cooling performance is first proposed and the algorithm of numerical simulation is verified. On this basis, orthogonal combinations of structural parameters are carried out for the expansion angle α of the lobed nozzle and the spacing S between the outlet plane of the lobed nozzle and the inlet plane of the mixing tube. The flow and the temperature distribution inside the enclosure are analysed under different operating conditions. The results show that the influence of the lobed nozzle expansion angle α and the spacing S on the performance is not a single-valued function but the two influencing factors are mutually constrained and influenced by each other. For any spacing, the combined coefficient is optimal for the expansion angle α = 30°. When the expansion angle α = 45° and the spacing S = 100 mm, the combined coefficient and the temperature distribution inside the enclosure are optimal at the same time.
    Źródło:
    Polish Maritime Research; 2022, 3; 119-127
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Time-slot based architecture for power beam-assisted relay techniques in CR-WSNs with transceiver hardware inadequacies
    Autorzy:
    Umer, Mushtaq Muhammad
    Jiang, Hong
    Zhang, Qiuyun
    Manlu, Liu
    Muhammad, Owais
    Powiązania:
    https://bibliotekanauki.pl/articles/27311438.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    cognitive radio WSNs
    energy harvesting
    DF relaying
    relay selection schemes in WSNs
    hardware inadequacy in WSNs
    wireless sensor networks
    zbieranie energii
    bezprzewodowa sieć czujników
    WSN
    sieci radia kognitywnego
    przekaz DF
    bezprzewodowe sieci sensoryczne
    Opis:
    Over the past two decades, numerous research projects have concentrated on cognitive radio wireless sensor networks (CR-WSNs) and their benefits. To tackle the problem of energy and spectrum shortfall in CR-WSNs, this research proposes an underpinning decode-&-forward (DF) relaying technique. Using the suggested time-slot architecture (TSA), this technique harvests energy from a multi-antenna power beam (PB) and delivers source information to the target utilizing energy-constrained secondary source and relay nodes. The study considers three proposed relay selection schemes: enhanced hybrid partial relay selection (E-HPRS), conventional opportunistic relay selection (C-ORS), and leading opportunistic relay selection (L-ORS). We present evidence for the sustainability of the suggested methods by examining the outage probability (OP) and throughput (TPT) under multiple primary users (PUs). These systems leverage time switching (TS) receiver design to increase end-to-end performance while taking into account the maximum interference constraint and transceiver hardware inadequacies. In order to assess the efficacy of the proposed methods, we derive the exact and asymptotic closed-form equations for OP and TPT & develop an understanding to learn how they affect the overall performance all across the Rayleigh fading channel. The results show that OP of the L-ORS protocol is 16% better than C-ORS and 75% better than E-HPRS in terms of transmitting SNR. The OP of L-ORS is 30% better than C-ORS and 55% better than E-HPRS in terms of hardware inadequacies at the destination. The L-ORS technique outperforms C-ORS and E-HPRS in terms of TPT by 4% and 11%, respectively.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 5; art. no. e146620
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Collaborative 3D-To-2D Tight-Fitting Garment Pattern Design Process for Scoliotic People
    Proces projektowania odzieży dla osób ze skoliozą przy użyciu skanera 3D
    Autorzy:
    Hong, Y.
    Zeng, X.
    Bruniaux, P.
    Liu, K.
    Chen, Y.
    Zhang, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/232785.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    atypical morphology
    virtual prototyping
    collaborative design
    sensory evaluation
    design process
    nietypowa morfologia
    projektowanie wirtualne
    ocena sensoryczna
    proces projektowania
    Opis:
    This paper presents a virtual design process for a tight-fitting garment pattern for adapter consumer garments, aimed at consumers with scoliosis. The design process proposed is based on a virtual human model created using a 3D scanner, allowing simulation of the morphological shape of an individual with atypical physical deformations. Customized 2D and 3D virtual garment prototyping tools are used in combination to create products through interactions between the consumer, designer and pattern maker. After following an interactive sequence: Scanning – Design – Display – Evaluation – Adjustment, a final design solution acceptable to both the designer and consumer can be obtained. Through this process, traditional 2D garment design knowledge, especially design rules influenced by the fabric information, is fully utilized to support the design process proposed. Using the knowledge based collaborative design process, design satisfaction can be largely improved.
    W artykule przedstawiono wirtualny proces projektowania wzoru odzieży dla osób ze skoliozą. Zaproponowany projekt jest oparty na wirtualnym modelu ciała człowieka stworzonym przy użyciu skanera 3D, umożliwiającego symulację morfologicznego kształtu ciała osoby o nietypowych deformacjach fizycznych. Po wykonaniu sekwencji interaktywnej: skanowanie – projekt – wyświetlacz – ocena – dostosowanie, można uzyskać ostateczne rozwiązanie projektowe akceptowalne zarówno dla projektanta, jak i dla konsumentów. W tym procesie tradycyjna wiedza z zakresu zasad projektowania odzieży 2D jest w pełni wykorzystywana w celu wspierania zaproponowanego procesu projektowania. Korzystając z kombinacji obu systemów 2D i 3D można w znacznym stopniu poprawić jakość otrzymanego projektu. Udane rozwiązania projektowe można zintegrować z bazą wiedzy o projektowaniu mody, aby tworzyć nowe zasady projektowania i rozszerzać profesjonalną wiedzę dotyczącą projektowania.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2017, 5 (125); 113-118
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of bonding condition on mechanical performance of synthetic sports surfaces by FEM
    Autorzy:
    Wang, Hong
    Zheng, Weitao
    Liu, Gan
    Guo, Zhihao
    Han, Rui
    Li, Duo
    Powiązania:
    https://bibliotekanauki.pl/articles/2200836.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    bonding condition
    synthetic sports surface
    finite element method
    Opis:
    The purpose of the study was to evaluate the effect of interlayer bonding conditions on the mechanical performance of a synthetic sports track with time. A two-dimensional finite element model of the synthetic sports track was developed in order to calculate the track temperature stress and strain in thermal environmental conditions. Thermal and structural responses of the multi-layer sports ground were simulated using a transient thermal and structural analysis in one day. Based on that, different physical parameters of the interlayer were considered to analyze the influence of the bonding layer status on the potential damage of the surface layer in the sports track. The results indicated that different bonding conditions would affect the strain difference between the top and bottom of the synthetic sports layer, which might cause a weak mechanical performance of the synthetic sports layer. Finally, 2D finite element analysis was regarded to be a proper tool to simulate the transient thermal and mechanical behavior of the synthetic sports track. The suggested simulation model can predict the influence of bonding conditions on damage of the synthetic sports track, which can provide some guidance for engineers and technicians working on constructions of synthetic sports tracks.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2022, 60, 4; 637--647
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    HBx and SP1 upregulate DKK1 expression
    Autorzy:
    Peng, Hong
    Li, Yongguo
    Liu, Yunzhi
    Zhang, Jingnan
    Chen, Ke
    Huang, Ailong
    Tang, Hua
    Powiązania:
    https://bibliotekanauki.pl/articles/1038681.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    HCC
    HBV
    DKK1
    SP1
    Opis:
    Numerous evidences suggested that the hepatitis B virus (HBV) was recognized as an important factor in the development of hepatocellular carcinoma (HCC). Dickkopf-1 (DKK1) recently was reported to be involved in the progress of HCC. HBV may regulate DKK1 expression in hematoma carcinogenesis. Here, we demonstrated that HBV could regulate DKK1 promoter activity which resulted in upregulation of its mRNA and protein expression in several HBV existing cell lines, and HBx played a prominent role in this process. Transcription factor binding site search result showed that there is a SP1 site in DKK1 promoter region. Luciferase assay showed that overexpression of SP1 could increase DKK1 promoter activity in a dose dependent manner. Accordingly, siRNA inhibition of SP1 expression reduced DKK1 promoter activity and decreased the expression of DKK1 protein.
    Źródło:
    Acta Biochimica Polonica; 2017, 64, 1; 35-39
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Response of vitamins A, E, hematological and serum biochemical markers in Crucian carp (Carassius auratus gibelio) exposed to environmental Pb2+ and Cd2+
    Autorzy:
    Khan, Sher
    Zhou, Peiyuan
    Liu, Xiaoyu
    Li, Hong
    Li, Jingna
    Rehman, Zia ur
    Ahmad, Ijaz
    Powiązania:
    https://bibliotekanauki.pl/articles/1039010.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    vitamins A and E
    hematology
    serum chemistry
    Crucian carp (Carassius auratus gibelio)
    Cd2+
    Pb2+
    Opis:
    Toxicity of Pb2+ and Cd2+ is a widespread issue in the world; however, few studies have been conducted to understand their effect at environmentally realistic concentration in a mixture. In the present study, Crucian carp was exposed to Pb2+ (30 µg·l-1), Cd2+ (100 µg·l-1) and their mixture (30+100 µg·l-1) for 96 h and 21 d period to assess changes in the liver and muscle vitamin A and E content, and hematological and serum biochemical parameters. The results indicated significant decline in the level of antioxidant vitamins A, E and alterations in the hematological and serum biochemical indices. The toxicity revealed anemia, impairment of the liver and kidney with evident responses after 21 d exposure due to additive effect of Pb2+ and Cd2+ in mixture. Moreover, the differential response of vitamins A, E and blood parameters to low levels of waterborne Pb2+ and Cd2+ in freshwater fish can be used as biomarkers for monitoring contamination of aquatic environment.
    Źródło:
    Acta Biochimica Polonica; 2015, 62, 3; 581-587
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reliability assessment of wind turbine generators by fuzzy universal generating function
    Autorzy:
    Huang, Tudi
    Xiahou, Tangfan
    Li, Yan-Feng
    Qian, Hua-Ming
    Liu, Yu
    Huang, Hong-Zhong
    Powiązania:
    https://bibliotekanauki.pl/articles/1841742.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    reliability assessment
    double fed induction generator
    multi-state system
    fuzzy universal generating function
    Opis:
    Wind power has been widely used in the past decade because of its safety and cleanness. Double fed induction generator (DFIG), as one of the most popular wind turbine generators, suffers from degradation. Therefore, reliability assessment for this type of generator is of great significance. The DFIG can be characterized as a multi-state system (MSS) whose components have more than two states. However, due to the limited data and/or vague judgments from experts, it is difficult to obtain the accurate values of the states and thus it inevitably contains epistemic uncertainty. In this paper, the fuzzy universal generating function (FUGF) method is utilized to conduct the reliability assessment of the DFIG by describing the states using fuzzy numbers. First, the fuzzy states of the DFIG system’s components are defined and the entire system state is calculated based the system structure function. Second, all components’ states are determined as triangular fuzzy numbers (TFN) according to experts’ experiences. Finally, the reliability assessment of the DFIG based on the FUGF is conducted.
    Źródło:
    Eksploatacja i Niezawodność; 2021, 23, 2; 308-314
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis And Electrochemical Characteristics Of Mechanically Alloyed Anode Materials SnS2 For Li/SnS2 Cells
    Synteza mechaniczna i charakterystyka elektrochemiczna materiałów anodowych SnS2 dla ogniw Li/SnS2
    Autorzy:
    Hong, J. H.
    Liu, X. J.
    Park, D. K.
    Kim, K. W.
    Ahn, H. J.
    Ahn, I. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/356903.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    MA
    Li/SnS2 cell
    PCA
    wet milling process and electrochemical characteristics
    ogniwa Li/SnS2
    charakterystyka elektromechaniczna
    Opis:
    With the increasing demand for efficient and economic energy storage, tin disulfide (SnS2), as one of the most attractive anode candidates for the next generation high-energy rechargeable Li-ion battery, have been paid more and more attention because of its high theoretical energy density and cost effectiveness. In this study, a new, simple and effective process, mechanical alloying (MA), has been developed for preparing fine anode material tin disulfides, in which ammonium chloride (AC), referred to as process control agents (PCAs), were used to prevent excessive cold-welding and accelerate the synthesis rates to some extent. Meanwhile, in order to decrease the mean size of SnS2 powder particles and improve the contact areas between the active materials, wet milling process was also conducted with normal hexane (NH) as a solvent PCA. The prepared powders were both characterized by X-ray diffraction, Field emission-scanning electron microscopeand particle size analyzer. Finally, electrochemical measurements for Li/SnS2 cells were takenat room temperature, using a two-electrode cell assembled in an argon-filled glove box and the electrolyte of 1M LiPF6 in a mixture of ethylene carbonate(EC)/dimethylcarbonate (DMC)/ethylene methyl carbonate (EMC) (volume ratio of 1:1:1).
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1191-1194
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ethnobotany of Acorus in China
    Autorzy:
    Shu, H.
    Zhang, S.
    Lei, Q.
    Zhou, J.
    Ji, Y.
    Luo, B.
    Hong, L.
    Li, F.
    Liu, B.
    Long, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/59160.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    In China, species in the genus Acorus are used for many different purposes, viz., in traditional medicine, for rituals, and as ornamental plants. Acorus calamus (sweet flag) has been a symbolic plant in Chinese culture for many centuries and is used as a ceremonial object in festivals throughout the country. For other Acorus species in China, ethnobotanical records are few. During field investigations from 2006 to 2017, we interviewed 573 individuals representing ethnic groups such as the Miao, Yao, Buyi, Shui, Tujia, Dong, She, Maonan, Zhuang, Yi, and Han people. Various ethnobotanical approaches were adopted in the field surveys, including key informant interviews, semistructured interviews, participatory observation, direct observation, etc. The results have revealed a rich treasure trove of traditional knowledge on Acorus in China. Two species (A. macrospadiceus and A. gramineus) were used by ethnic groups as spices to add flavor to meat. Through the study found that all the species of Acorus had medicinal value, especially A. tatarinowii, deafness, blindness, and digestive disorders were among the conditions commonly treated using these plants. Traditional knowledge of the cultural, ethnomedicinal, and food values of Acorus, based on our recent literature surveys and field investigations in China is presented here. A better understanding of Acorus is vital for conserving the plants and the traditional knowledge associated with them.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2018, 87, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of differential serum expression of three factors and pulmonary function in patients with silicosis
    Autorzy:
    Zhu, Ying
    Duan, Xia Yu
    Cheng, Yun Qi
    Yao, Xin Jing
    Xu, Hong
    Zhang, Kui Sheng
    Li, Feng Shi
    Yang, Fang
    Liu, Liang He
    Yuan, Xiang Ju
    Powiązania:
    https://bibliotekanauki.pl/articles/2086531.pdf
    Data publikacji:
    2021-08-05
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    silicosis
    pulmonary function
    early diagnosis
    ROC
    PTPN2
    factor B
    Opis:
    ObjectivesSilicosis is a chronic occupational lung disease. As was previously found by the authors, some proteins increased in the lung tissue of activated rats, and protein tyrosine phosphatase non-receptor type 2 (PTPN2), factor B, and vaccinia-related kinase 1 (VRK1) showed highly differential expressions.Material and MethodsIn this study, serum and bronchoalveolar lavage fluid samples were collected from patients with silicosis and healthy people to verify the expression of PTPN2, factor B, and VRK1. The diagnostic value of differentially expressed proteins for silicosis was judged.ResultsThe expression levels of serum PTPN2, VRK1, and factor B in patients with silicosis were significantly higher than those in the control group (p < 0.01). Higher serum PTPN2 and factor B concentrations significantly and negatively correlated with the ratio of forced expiratory volume in 1 s to forced vital capacity (FEV1/FVC), maximum vital capacity (VCmax), FEV1, and FVC, suggesting that the high expression of PTPN2 and factor B is associated with decreased pulmonary ventilation function and restrictive ventilatory impairment in patients with silicosis. All area under curve (AUC) measurements generated from single detection events were >0.744, with PTPN2 reaching the highest value (0.858). The AUC, sensitivity, and specificity for the combined diagnosis using factor B and PTPN2 were 0.907, 86.91% and 85.07%, respectively, for factor B and PTPN2. The 3 differentially expressed proteins are potential classes of predictive biomarkers for silicosis.ConclusionsRegarding the economy and test practicality, the best diagnostic combination is factor B and PTPN2 for the analysis of AUC, sensitivity and specificity.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2021, 34, 4; 527-540
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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