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Wyszukujesz frazę "Zhou, M." wg kryterium: Autor

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    Wyświetlanie 1-9 z 9
    Tytuł:
    Numerical study on the influences of canal geometry on ship squat
    Autorzy:
    Zhou, M.
    Zou, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/360783.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    accurate prediction
    safety passage
    restricted waters
    numerical calculations
    squat
    Opis:
    Accurate prediction of the ship squat is of significance to ensure safety passage of ships in restricted waters. In this paper, a first-order Rankine source panel method is adopted to predict the squat of a ship sailing in restricted canal. Taking KVLCC2 tanker as example, numerical calculations are carried out for the ship travelling in a canal with different conditions. The results of squat are compared with measurement data and the results from empirical formulas. The influence of canal geometry on ship squat is investigated.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 36 (108) z. 1; 195-199
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seismic material properties of reinforced concrete and steel casing composite concrete in elevated pile-group foundation
    Autorzy:
    Zhou, M.
    Yuan, W.
    Zhang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/963367.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    pseudo-static tests
    material properties
    reinforced concrete
    steel composite concrete
    Opis:
    The paper focuses on the material mechanics properties of reinforced concrete and steel casing composite concrete under pseudo-static loads and their application in structure. Although elevated pile-group foundation is widely used in bridge, port and ocean engineering, the seismic performance of this type of foundation still need further study. Four scale-specimens of the elevated pile-group foundation were manufactured by these two kinds of concrete and seismic performance characteristic of each specimen were compared. Meanwhile, the special soil box was designed and built to consider soil-pile-superstructure interaction. According to the test result, the peak strength of strengthening specimens is about 1.77 times of the others and the ultimate displacement is 1.66 times of the RC specimens. Additionally, the dissipated hysteric energy capability of strengthening specimens is more than 2.15 times of the others as the equivalent viscous damping ratio is reduced by 50%. The pinching effect of first two specimens is more obvious than latter two specimens and the hysteretic loops of reinforced specimens are more plumpness. The pseudo-static tests also provided the data to quantitatively assessment the positive effect of steel casing composite concrete in aseismatic design of bridge.
    Źródło:
    Polish Maritime Research; 2015, S 1; 141-148
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    H−/H∞ fault detection observer design for a polytopic LPV system using the relative degree
    Autorzy:
    Zhou, M.
    Rodrigues, M.
    Shen, Y.
    Theilliol, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/330200.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    fault detection observer
    polytopic LPV system
    relative degree of output
    actuator fault detection
    sensor fault detection
    detekcja uszkodzeń
    urządzenie wykonawcze
    czujnik detekcji
    Opis:
    This paper proposes an H−/H∞ fault detection observer method by using generalized output for a class of polytopic linear parameter-varying (LPV) systems. As the main contribution, with the aid of the relative degree of output, a new output vector is generated by gathering the original output and its time derivative, and it is feasible to consider H− actuator fault sensitivity in the entire frequency for the new system. In order to improve actuator and sensor fault sensitivity as well as guarantee robustness against disturbances, simultaneously, an H−/H∞ fault detection observer is designed for the new LPV polytopic system. Besides, the design conditions of the proposed observer are transformed into an optimization problem by solving a set of linear matrix inequalities (LMIs). Numerical simulations are provided to illustrate the effectiveness of the proposed method.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 1; 83-95
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nonnegativity, stability analysis of linear discrete-time positive descriptor systems: an optimization approach
    Autorzy:
    Yang, H.
    Zhou, M.
    Zhao, M.
    Pan, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/202195.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    descriptor systems
    positive systems
    positivity
    stability
    optimization
    stabilność
    optymalizacja
    deskryptor
    Opis:
    This paper discusses an efficient approach to the analysis of positivity and stability of linear discrete-time positive descriptor system. Irs main objective is to convert the necessary and sufficient condition of characterizing positivity and stability of positive descriptor systems into an optimization problem, then propose a method to numerically check the positivity and stability of the positive linear discrete-time systems. Comparing with the other methods now available, the approach presented in this paper is less theoretical and easier to implement. Examples are provided in order to validate results.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 1; 1-7
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Restructuring of a zooplankton community by perturbation from a wind-forced coastal jet
    Autorzy:
    Pedersen, O.-P.
    Tande, K.S.
    Li, C.
    Zhou, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/47789.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    zooplankton
    filament
    intrusion
    restructuring
    mesoscale
    perturbation
    coastal region
    Norway
    transient wind
    saline water
    equivalent spherical diameter
    Opis:
    The impact of transient wind events on an established zooplankton community was observed during a field survey in a coastal region off northern Norway in May 2002. A transient wind event induced a coastal jet/filament intrusion of warm, saline water into our survey area where a semi-permanent eddy was present. There was an abrupt change in zooplankton community structure within 4–7 days of the wind event, with a change in the size structure, an increase in lower size classes less than 1 mm in equivalent spherical diameter (ESD) and a decrease in larger size classes greater than 1.5 mm in ESD. The slope of zooplankton biovolume spectra changed from −0.6 to −0.8, consistent with the size shifting towards smaller size classes. This study shows that even well established zooplankton communities are susceptible to restructuring during transient wind events, and in particular when wind forcing induces horizontal currents or filaments.
    Źródło:
    Oceanologia; 2010, 52, 3; 473-497
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Combined Influence of Silicon Content and Oxygen Concentration on the Oxidation Process of Silicon-Containing Steels
    Autorzy:
    Yuan, Q.
    Xu, G.
    Zhou, M.
    He, B.
    Hu, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/352126.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    silicone content
    oxygen concentration
    mass gain
    isothermal holding time
    Opis:
    The combined influence of silicon content and oxygen concentration on silicon-containing steels was investigated, via a heating route similar to that applied in the industrial reheating process, using a Simultaneous Thermal Analyzer (STA). Four different oxygen concentrations and three different isothermal holding times were designed. The results show that the effect of silicon on the mass gain depends on the oxygen concentration and the oxidation time. The mass gain of low-silicon steel is greater than that of high-silicon steel at 1260°C in the oxygen concentrations of 1.0 vol.% and 2.0 vol.%, even when the isothermal holding time is 90 minutes. However, there is a critical time point for mass gain in oxygen concentrations ≥3.0 vol.%. The mass gain of lowsilicon steel is greater before and smaller after this critical point. The critical time is deferred with decreasing oxygen concentration.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 1; 445-450
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Comprehensive Study of the Electrostatic Discharge Sensitivity and Chargeability of Tris(carbohydrazide)zinc Perchlorate
    Autorzy:
    Li, Z.
    Zeng, D.
    Zhou, Z.
    Zhou, M.
    Zhang, T.
    Huang, H.
    Zhang, J.
    Yang, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/358298.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    primary explosive
    tris(carbohydrazide)zinc perchlorate
    electrostatic discharge sensitivity
    chargeability
    Opis:
    Most primary explosives are non-conductors, easily accumulate charge when contacting with and separating from other materials, and are sensitive to electrostatic discharge (ESD). In order to reduce the number of accidents caused by ESD initiation of primary explosives, studies on their electrostatic hazards are necessary. This work presents comprehensive experimental results of electrostatic discharge sensitivity and chargeability of tris(carbohydrazide)zinc perchlorate (ZnCP) under different conditions. The influences of the testing conditions, of devices, particle size, ambient temperature and relative humidity on the electrostatic discharge sensitivity and chargeability have been investigated in detail, and the quantitative regression equations obtained.
    Źródło:
    Central European Journal of Energetic Materials; 2014, 11, 4; 553-573
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal control strategy for marine SSP podded propulsion motor based on strong tracking-EPF
    Autorzy:
    Yao, W.
    Liu, Y.
    Sun, H.
    Zhang, G.
    Zhang, J.
    Zhou, M.
    Sun, M.
    Jiang, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/258784.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    marine electric propulsion
    EPF
    ST-EPF
    SSP podded propulsion
    propulsion motor
    Opis:
    Aiming at the non-linearity of state equation and observation equation of SSP (Siemen Schottel Propulsor) propulsion motor, an improved particle filter algorithm based on strong tracking extent Kalman filter (ST-EKF) was presented, and it was imported into the marine SSP propulsion motor control system. The strong tracking filter was used to update particles in the new algorithm and produce importance densities. As a result, the problems of particle degeneracy and sample impoverishment were ameliorated, the propulsion motor states and the rotor resistance were estimated simultaneously using strong track filter (STF), and the tracking ability of marine SSP propulsion motor control system was improved. Simulation result shown that the improved EPF algorithm was not only improving the prediction accuracy of the motor states and the rotor resistance, but also it can satisfy the requirement of navigation in harbor. It had the better accuracy than EPF algorithm.
    Źródło:
    Polish Maritime Research; 2015, S 1; 4-9
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Common mycelium networks with Paraglomus occultum induce better plant growth and signal substance changes between trifoliate orange seedlings
    Autorzy:
    Zhang, Y.-C.
    Xie, M.-M.
    Feng, H.-D.
    Zhou, M.
    Zhang, Z.Z.
    Liu, C.-Y.
    Wu, Q.-S.
    Powiązania:
    https://bibliotekanauki.pl/articles/11877054.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    Mycorrhizal mycelium can simultaneously colonize two and more neighboring plants to form common mycelium network (CMNs), whereas the information regarding CMN effects on endogenous signal substances is limited. In this study, a rootbox was separated by 37- or 0.45-μm mesh to establish donor chamber (the presence of roots and hyphae) and receptor (hyphae presented or not, free of roots) chamber, where an arbuscular mycorrhizal (AM) fungus Paraglomus occultum was inoculated into trifoliate orange seedlings of donor chamber to illustrate the underground communications of signal substances by CMNs. Mycorrhizal colonization resulted in better plant growth performance and greater root morphology in donor and receptor plants. AM inoculation increased significantly the root nitric oxide (NO) and calmodulin (CaM) levels of donor plants, regardless of 37- and 0.45-μm mesh, and subsequent CMNs induced higher root NO and CaM levels in receptor plants. Mycorrhizal colonization did not produce significant changes in root zeatin riboside (ZR) levels of donor plants, but CMN hyphae modulated lower root ZR levels of receptor plants. Mycorrhizal inoculation and subsequent CMN hyphae induced lower root gibberellin levels of donor and receptor plants, and only CMN hyphae produced lower root methyl jasmonate concentrations of receptor plants. Our results first reveal the underground communication of CaM, NO, and ZR by CMNs with P. occultum between trifoliate orange seedlings.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 6; 95-104
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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