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    Wyświetlanie 1-13 z 13
    Tytuł:
    Bacterial communities in PM2.5 and PM10 in broiler houses at different broiler growth stages in spring
    Autorzy:
    Zhang, J.
    Li, Y.
    Xu, E.
    Jiang, L.
    Tang, J.
    Li, M.
    Zhao, X.
    Chen, G.
    Zhu, H.
    Yu, X.
    Zhang, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087465.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bacterial communities
    broilers
    high-throughput sequencing
    particulate matter
    Źródło:
    Polish Journal of Veterinary Sciences; 2019, 3; 495-504
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Visualization investigation on the marine data with multivariate statistical analysis methods
    Autorzy:
    Li, Y.
    Lu, Z.
    Wang, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/260477.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    marine data
    factor analysis
    cluster analysis
    discriminate analysis
    visualization
    Opis:
    Marine information is an important way for us to know and study more about the ocean. Marine data makes the basic of marine information. Because of the huge quantity and diversity of marine data, and at the same time marine data is polyatomic variable, we start with statistical analysis methods to search for the regularity of the marine data. On one hand, we get the aggregate variation functions of the marine data by factor analyzing in aspect of the spatiality. Then we visually describe the marine status of the studied sea area with pre variogram function and post variogram function. On the other hand, we used cluster analysis method to get the verifying rule in time and make visible graphs of the marine data. In this way, we can also supply with the suggestions in classifying the sea seawater quality. The data processing result shows that the suggested methods in this article are both operable and effective. At the same time some reasonable suggestions are given in the article.
    Źródło:
    Polish Maritime Research; 2017, S 2; 89-94
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation model and state analysis of ship transmission line
    Autorzy:
    Hu, Y.
    Xu, M.
    Li, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/259613.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship power
    transmission line
    simulation model
    insulation deterioration
    Opis:
    In order to discuss the simulation model of the ship transmission line and the state of the transmission line, an early fault model is built according to the evolution principle of the short circuit fault of the transmission line and combining with the fault characteristics of the early fault. A small distributed ship transmission line system is built in MATLAB/ Simulink. Then, combined with the constructed fault module, the original short circuit module, and the load module, the various states (normal state, early fault state, severe early fault state, short circuit state) of the ship transmission line are stimulated, and the features of voltage signal in each state is analysed. It is concluded that, due to the normal operation of the ship transmission line system, the variation characteristics of the flow signal and voltage signal caused by the sudden load mutation, that is, the sudden load and the sudden increase load, are very similar to the changes caused by the early fault. Therefore, in order to find a more accurate early fault detection method, the state is divided into normal state, sudden load state, sudden increase and sudden decrease load state.
    Źródło:
    Polish Maritime Research; 2018, S 3; 36-42
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kriging based robust optimisation algorithm for minimax problems in electromagnetics
    Autorzy:
    Li, Y.
    Rotaru, M.
    Sykulski, J. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/141299.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    worst-case optimisation
    minimax problems
    kriging
    robust design
    Opis:
    The paper discusses some of the recent advances in kriging based worst-case design optimisation and proposes a new two-stage approach to solve practical problems. The efficiency of the infill points allocation is improved significantly by adding an extra layer of optimisation enhanced by a validation process.
    Źródło:
    Archives of Electrical Engineering; 2016, 65, 4; 843-854
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improved method for phase wraps reduction in profilometry
    Autorzy:
    Du, G.
    Wang, M.
    Zhou, C.
    Si, S.
    Li, H.
    Lei, Z.
    Li, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/173793.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    phase unwrapping
    zero-padding
    Fourier transform
    carrier-frequency
    profilometry
    Opis:
    In order to completely eliminate, or greatly reduce the number of phase wraps in 2D wrapped phase map, Gdeisat and co-workers proposed an algorithm, which uses shifting the spectrum towards the origin. But the spectrum can be shifted only by an integer number, meaning that the phase wraps reduction is often not optimal. In addition, Gdeisat’s method will take much time to make the Fourier transform, inverse Fourier transform, select and shift the spectral components. In view of the above problems, we proposed an improved method for phase wraps elimination or reduction. First, the wrapped phase map is padded with zeros, the carrier frequency of the projected fringe is determined by high resolution, which can be used as the moving distance of the spectrum. And then realize frequency shift in spatial domain. So it not only can enable the spectrum to be shifted by a rational number when the carrier frequency is not an integer number, but also reduce the execution time. Finally, the experimental results demonstrated that the proposed method is feasible.
    Źródło:
    Optica Applicata; 2017, 47, 2; 295-306
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    One shot profilometry using iterative two-step temporal phase-unwrapping
    Autorzy:
    Du, G.
    Wang, M.
    Zhou, C.
    Si, S.
    Li, H.
    Lei, Z.
    Li, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/173912.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    phase unwrapping
    composite fringe pattern
    Fourier transform
    two-step temporal phase-unwrapping
    Opis:
    This paper reviews two techniques that have been recently published for three-dimensional profilometry and proposes one shot profilometry using iterative two-step temporal phase-unwrapping by combining the composite fringe projection and the iterative two-step temporal phase unwrapping algorithm. In temporal phase unwrapping, many images with different frequency fringe pattern are needed to project, which would take much time. In order to solve this problem, Ochoa proposed a phase unwrapping algorithm based on phase partitions using a composite fringe. However, we found that the fringe order determined through the construction of phase partitions tended to be imprecise. Recently, we proposed an iterative two-step temporal phase unwrapping algorithm, which can achieve high sensitivity and high precision shape measurement. But it needs multiple frames of fringe images which would take much time. In order to take into account both the speed and accuracy of three-dimensional shape measurement, we get a new, and more accurate unwrapping method based on a composite fringe pattern by combining these two techniques. This method not only retains the speed advantage of Ochoa’s algorithm, but also greatly improves its measurement accuracy. Finally, the experimental evaluation is conducted to prove the validity of the proposed method.
    Źródło:
    Optica Applicata; 2017, 47, 1; 97-110
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    Tytuł:
    Dichloromethane-Extract of Propolis (DEP) and DEP/PLA Electrospun Fiber Membranes
    Zastosowanie ekstrakt z propolisu (DEP) i do wytworzenia elektroprzędzonych membran światłowodowych DEP/PLA
    Autorzy:
    Yan, T.
    Zhang, M.
    Shi, Y.
    Li, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/946157.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    propolis
    dichloromethane-extract of propolis DEP
    electrospun
    antibacterial
    wyciąg z dichlorometanu propolisu
    DEP
    właściwości przeciwbakteryjne
    Opis:
    Propolis is a waxy substance produced by the honeybee that has been used as a form of traditional medicine and natural medicine since ancient times. Propolis has a wide spectrum of alleged applications, including potential anti-infection and anti-cancer effects. The following paper used a propolis extract containing 90% ethanol solution, 70% ethanol solution, ligarine, and dichloromethane as solvents that extracted the bioactive components. The highest yield of the propolis was obtained via the 70% ethanol leaching method and dichloromethane immersion stirring method. Fourier Transform Infrared (FTIR) analysis proved that the extracted propolis with dichloromethane had the highest methylene content and the maximum types of effective propolis components. A Propolis/PLA electrospinning solution was prepared by adding PLA powder into the supernatant of the dichloromethane-extract of propolis (DEP) directly, with there being no need for purification of the propolis extract and thus reducing the loss of active ingredients. DEP/PLA nanofiber was prepared via the electrospinning process, where it was found that with additional 4% PLA, the final electrospun fiber membrane was stabilised. tStudy of the antibacterial performance of the DEP/PLA electrospun membrane showed that the membrane affected some of the antibacterial properties. It was particularly effective when inhibiting Staphylococcus aureus, but not as effective when inhibiting Escherichia coli. This electrostatic spinning membrane could be used for food preservation, wound healing, and tissue engineering.
    Propolis to woskowa substancja wytwarzana przez pszczołę miodną, która od starożytności była stosowana jako forma tradycyjnej medycyny i medycyny naturalnej. Propolis ma szerokie spektrum domniemanych zastosowań, w tym potencjalne działanie przeciwinfekcyjne i przeciwnowotworowe. W pracy użyto ekstraktu propolisu zawierającego 90% roztwór etanolu, 70% roztwór etanolu, ligarinę i dichlorometan jako rozpuszczalniki, które ekstrahowały składniki bioaktywne. Najwyższą wydajność propolisu uzyskano metodą wymywania 70% etanolu i metodą mieszania zanurzeniowego w dichlorometanie. Analiza w podczerwieni z transformacją Fouriera (FTIR) wykazała, że wyekstrahowany propolis z dichlorometanem miał najwyższą zawartość metylenu i dużą skuteczność. Roztwór propolis/PLA przygotowano przez dodanie proszku PLA bezpośrednio do ekstraktu z dichlorometanu propolisu (DEP), bez potrzeby oczyszczania, tym sposobem zmniejszono utraty składników aktywnych. Nanowłókno DEP/PLA zostało przygotowane w procesie elektroprzędzenia, w którym stwierdzono, że przy 4% PLA membrana z włókien elektroprzędzonych jest stabilna. Ocena skuteczności antybakteryjnej membrany DEP/PLA wykazała, że posiada ona właściwości przeciwbakteryjne. Stwierdzono zadowalającą skuteczność w hamowaniu Staphylococcus aureus, przy jednocześnie niższej skuteczności w hamowaniu Escherichia coli. Wytworzona membrana może być używana do konserwacji żywności, gojenia się ran i w inżynierii tkankowej.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2018, 6 (132); 57-62
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Behavior of gallium and germanium associated with zinc sulfide concentrate in oxygen pressure leaching
    Autorzy:
    Liu, F.
    Liu, Z.
    Li, Y.
    Wilson, B. P.
    Lundstrom, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/110812.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    zinc sulfide concentrate
    gallium
    germanium
    pyrite
    oxygen pressure leaching
    Opis:
    The Fankou zinc concentrate (Guangdong province, China) was mineralogically characterized and results showed that the main germanium-bearing minerals in the sample comprised of zinc sulfide and galena, whereas gallium-bearing minerals were pyrite, sphalerite and silicate. Oxygen pressure leaching of zinc sulfide concentrate was carried out in order to investigate the effect of pressure, leaching time, sulfuric acid and copper concentrations on the leaching behavior of gallium and germanium. Under optimum conditions, leaching of Zn, Fe, Ge and Ga reached 98.21, 90.45, 97.45 and 96.65%, respectively. In the leach residues, it was determined that some new precipitates, such as PbSO4, CaSO4 and SiO2, were formed, which co-precipitated a certain amount of Ga and Ge from the leach solution. The results clearly indicated that Ga and Ge were much more difficult to leach than Zn, and provided answers to why the leaching efficiency of Ga is 10% lower when compared to Ge.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 2; 1047-1060
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of IL-1β, IL-6 and TNF-αin Sprague-Dawely rats’ atrophic thymus induced by lipopolysaccharide
    Autorzy:
    Zhong, Y.B.
    Zhang, X.L.
    Lv, M.Y.
    Hu, X.F.
    Li, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087664.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lipopolysaccharide
    pro-inflammatory cytokines
    thymus atrophy
    rat
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 3; 589-597
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    Tytuł:
    Stability control of propeller Autonomous Underwater Vehicle based on combined sections method
    Autorzy:
    Qi, D.
    Feng, J.
    Liu, A.
    Hu, J.
    Xu, H.
    Li, Y.
    Ashraf, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/259119.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    propeller AUV
    dynamic model
    stability control
    simulation
    Opis:
    Learning from the motion principle of quadrotor, a symmetric propeller AUV, which has small size and low velocity is designed. Compared with the AUV equipped with rudders, it has better maneuverability and manipulation at low velocity. According to the Newton-Euler method, the 6 DOF kinematic model and dynamic model of the propeller AUV are established. A stability controller that consists of 3 different PID controllers is designed. It makes the depth and attitude angle as trigger conditions, and the relevant controller is chosen in different moving process. The simulation experiments simulate ideal motion state and disturbed motion state, and experiments results show that the stability controller based on combined sections method can make the best of mature technology of PID, and meet the control requirements in different stages. It has a higher respond speed and accuracy, improving the stability of the propeller AUV under the disturbance of complex ocean currents.
    Źródło:
    Polish Maritime Research; 2015, S 1; 157-162
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comprehensive surveillance of the antibody response to Borrelia burgdorferi s.l. in small ruminants in China
    Autorzy:
    Yang, J.
    Liu, Z.
    Guan, G.
    Li, Y.
    Chen, Z.
    Ma, M.
    Liu, A.
    Ren, Q.
    Wang, J.
    Luo, J.
    Yin, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/49708.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2015, 22, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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