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    Wyświetlanie 1-11 z 11
    Tytuł:
    An application of 24Model to analyse capsizing of the Eastern Star ferry
    Autorzy:
    Suo, X.
    Fu, G.
    Wang, C.
    Jia, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/258602.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Eastern Star ferry accident
    24 Model
    systematic accident causation model
    accident analysis
    hazards
    Opis:
    In the present study, the Eastern Star ferry accident was analyzed via 24Model. 24Model, as an accident causation model based on system thinking, holds that all causations of the accident are hazards and all hazards in the system need to be identified and comprehensively controlled in accident prevention. The result showed that five factors were the main causes of the accident. First, the direct causes: bad weather, the bad condition of the hull and the unsafe acts of the captain. Second, the indirect cause: the lack of safety awareness and safety knowledge of both the captain and the company’s senior management. Third, there were loopholes in safety management system, including the training, supervision and execution of the company. Forth, the root cause: the company didn’t establish a good safety culture. Last, the external causes: the severe market pressure, excessive regulatory authorities with puzzled relations and responsibilities—seriously hindered effective supervision. In order to prevent this kind of accident and to secure shipping system, the shipping companies and the relevant regulatory units should draw lessons from the five factors mentioned above, and take measures to identify and control those hazards.
    Źródło:
    Polish Maritime Research; 2017, S 3; 116-122
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A method for measuring the quality parameters of image intensifier based on projecting phase-shifting gratings
    Autorzy:
    Sun, S.
    Cao, Y.
    Chen, C.
    Fu, G.
    Wang, Y.
    Xu, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/174300.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    phase measurement
    phase-shifting grating
    distortion
    image intensifier
    imaging quality parameter
    Opis:
    A method for measuring the quality parameters of image intensifier based on projecting phase-shifting gratings is proposed. A set of designed phase-shifting gratings are projected into the measuring system orderly to obtain the magnification parameter of the measured image intensifier, and the phase caused by the measured image intensifier. After obtaining the referential phase caused by only the magnification of the measured image intensifier, the phase caused by the distortion of the measured image intensifier is extracted by phase calculating and phase unwrapping. Both the global distortion and the partial distortion of the measured image intensifier can be measured by phase-to-distortion matching at the same time. The experimental results show that the proposed method can measure the multiple quality parameters of image intensifier effectively.
    Źródło:
    Optica Applicata; 2018, 48, 1; 39-51
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badanie nanokompozytów poli(kwas metakrylowy-metakrylan metylu)/poli(N-winylo-2-pirolidon)/ wielościenne nanorurki węglowe
    Study of poly(methacrylic acid-co-methyl methacrylate) /poly(N-vinyl-2-pyrrolidone)/ multi-walled carbon nanotubes nanocomposites
    Autorzy:
    Liu, G.
    Fu, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/143230.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
    Tematy:
    P(MAA-co-MMA)/PVP/MWNT nanokompozyty
    morfologia
    właściwości mechaniczne
    P(MAA-co-MMA)/PVP/MWNTs nanocomposites
    morphology
    mechanical properties
    Opis:
    Nanokompozyty poli(kwas metakrylowy-metakrylan metylu) (P(MAA-co-MMA)) / poli(N-winylo-2-pirolidon) (PVP) / wielościenne nanorurki węglowe (MWNT) otrzymano na drodze wspomaganej ultradźwiękami polimeryzacji wolnorodnikowej w roztworze z emulgatorem. Stwierdzono, że przy małych stężeniach MWNT dyspergują równomiernie w mieszankach P(MAA-co-MMA)/PVP i wpływają na poprawę właściwości mechanicznych nanokompozytów P(MAA-co-MMA)/PVP/MWNT, natomiast wzrost zawartości MWNT w nanokompozytach wyraźnie poprawia się ich stabilność termiczną.
    Poly(methacrylic acid-co-methyl methacrylate) (P(MAA-co- MMA))/poly(N-vinyl-2-pyrrolidone) (PVP)/multiwalled carbon nanotubes (MWNTs) nanocomposites were prepared via ultrasonic assisted emulsifier solution free radical polymerization technique. It was found that, at low concentration of MWNTs, it could uniformly disperse into P(MAA-co-MMA)/PVP blends and provide P(MAA-co- MMA)/PVP/MWNTs nanocomposites much improved mechanical properties. Thermal stability for P(MAA-co-MMA)/PVP/MWNTs nanocomposites increased with increasing MWNTs content.
    Źródło:
    Chemik; 2013, 67, 11; 1066-1071
    0009-2886
    Pojawia się w:
    Chemik
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correction of sample-time error for time-interleaved sampling system using cubic spline interpolation
    Autorzy:
    Qin, G.
    Liu, G.
    Gao, M.
    Fu, X.
    Xu, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/221115.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    digital correction
    sample-time error
    time-interleaved sampling system
    cubic spline interpolation
    Opis:
    Sample-time errors can greatly degrade the dynamic range of a time-interleaved sampling system. In this paper, a novel correction technique employing a cubic spline interpolation is proposed for inter-channel sample-time error compensation. The cubic spline interpolation compensation filter is developed in the form of a finite-impulse response (FIR) filter structure. The correction method of the interpolation compensation filter coefficients is deduced. A 4GS/s two-channel, time-interleaved ADC prototype system has been implemented to evaluate the performance of the technique. The experimental results showed that the correction technique is effective to attenuate the spurious spurs and improve the dynamic performance of the system.
    Źródło:
    Metrology and Measurement Systems; 2014, 21, 3; 485-496
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal Decomposition Characteristics of Ammonium Nitrate(V) in the Presence of Mn2O3/Graphene Oxides
    Autorzy:
    Xu, Z.
    Xu, G.
    Fu, X.
    Wang, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/358837.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    ammonium nitrate(V)
    nano-oxides
    graphene oxide
    thermal decomposition
    RSFTIR
    Opis:
    Nano-composites (Mn2O3, Mn2O3/graphene oxides (GO)) were prepared by a new method. The nano-composites were characterized by XRD and HRTEM. The catalytic performance of the nano-composites on the thermal decomposition of ammonium nitrate(V) (AN) was investigated by TG-DSC and TG-MS. The reaction of AN with the nano-composites in the condensed phase was investigated by RSFTIR. The results of TG-DSC experiments indicated that the nano-composites significantly catalyze the thermal decomposition of AN, especial Mn2O3/GO. The exothermic reaction of AN with Mn2O3/GO commenced at about 185 °C. Based on the TG-MS results, it was ascribed to N2O formation. In the RSFTIR experiments, the dissociation reaction and ionization reaction of AN were both detected. NOx formation at low temperature was also found. NH2 was directly oxidized by HNO3/NO3− at low temperature. The interaction between Mn2O3 and NH3 was detected according to DRIFT experiments. At elevated temperature, the functional groups of GO are destroyed, which had an influence on the interaction between Mn2O3 and GO. A probable mechanism for the exothermic reaction and then its disappearance is proposed. HNO3 gas was absorbed on the surface of solid AN, which can markedly catalyze the thermal decomposition of AN. Perhaps the HNO3 plays a key role in the exothermic reaction and then the reaction of AN disappears at very low temperatures.
    Źródło:
    Central European Journal of Energetic Materials; 2017, 14, 3; 636-659
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multiple Frequency Ultrasounds Assisted Oil Sands Separation Technology
    Autorzy:
    Liao, K.
    Ge, J.
    Zhang, G.
    Fu, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/177718.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multiple frequency ultrasounds
    cavitation effect
    oil sands separation
    synergistic effect
    Opis:
    Ultrasound has a wide range of applications in oil sands separation industry due to its green and nopolluting characteristics. The combined ultrasounds technology has been widely used in many industries by virtue of the synergistic effect of cavitation effect; meanwhile, dual-frequency ultrasounds have been reported being used in lotion oil sands technology. Based on this idea, this study focuses on the application of multiple frequency ultrasounds in oil sands separation, and a comparative study has been conducted between the combined ultrasounds systems with the difference in the number of the ultrasound. The results show that the oil production rate of the samples treated by the lotion of sodium dodecyl benzene sulfonate (SDBS) and assisted by multiple frequency ultrasounds (96%) is significantly higher than that of the single frequency ultrasound (76%); the bigger the number of the ultrasound participating in the combination is, the higher the oil production rate of the oil sands is; the lower the frequency of the ultrasounds employed in the combined system is, the higher the oil production rate is. The optimum treating conditions for tri-frequency ultrasounds assisted technology are as follow: the treating time is 10-15 min, the treating temperature is 20-30°C, the concentration of surfactant in the lotion is 1.5 g/l, and the mass ratio of the lotion to oil sands is 1.8. In short, the use of multiple frequency ultrasounds can improve the oil production rate of oil sands, reduce the energy consumption during the separation process, and reduce the environmental contamination; therefore, multiple frequency ultrasounds assisted oil sands separation technology is a promising technology for oil sands resources exploitation with high efficiency.
    Źródło:
    Archives of Acoustics; 2017, 42, 4; 767-773
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soft anatomy of the Early Cambrian arthropod Isoxys curvirostratus from the Chengjiang biota of South China with a discussion on the origination of great appendages
    Autorzy:
    Fu, D.-J.
    Zhang, X.-L.
    Shu, D.-G.
    Powiązania:
    https://bibliotekanauki.pl/articles/22449.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    An updated reconstruction of the body plan, functional morphology and lifestyle of the arthropod Isoxys curvirostratusis proposed, based on new fossil specimens with preserved soft anatomy found in several localities of the Lower Cambrian Chengjiang Lagerstätte. The animal was 2–4 cm long and mostly encased in a single carapace which is folded dorsally without an articulated hinge. The attachment of the body to the exoskeleton was probably cephalic and apparently lacked any well−developed adductor muscle system. Large stalked eyes with the eye sphere consisting of two layers (as corneal and rhabdomeric structures) protrude beyond the anterior margin of the carapace. This feature, together with a pair of frontal appendages with five podomeres that each bear a stout spiny outgrowth, suggests it was raptorial. The following 14 pairs of limbs are biramous and uniform in shape. The slim endopod is composed of more than 7 podomeres without terminal claw and the paddle shaped exopod is fringed with at least 17 imbricated gill lamellae along its posterior margin. The design of exopod in association with the inner vascular (respiratory) surface of the carapace indicates I. curvirostratus was an active swimmer. Morphological comparisons demonstrate that species of Isoxys were diverse in feeding habits and occupied a very broad morphospace, i.e., carapace bivalved or a single shield, the pre−oral limbs antenniform or modified into great appendages, the succeeding endopods slim or stout. This casts doubt on the current taxonomy that assigns all species to a single genus, and on any presumed lifestyle of Isoxys extrapolated to the generic level. Finally, since I. curvirostratus and I. acutangulus carry a pair of great appendages, Isoxys has recently been placed into the great appendage arthropods. Such placement might be inadequate because the homology of the great appendages can not be established.
    Źródło:
    Acta Palaeontologica Polonica; 2011, 56, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stability of air nucleus in liquid water and cavitation inception on marine engineering
    Autorzy:
    Fu, Q.
    Chen, M.
    Wang, X.
    Zhu, R.
    Zhang, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/260137.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    air nuclei
    water
    molecular dynamics
    stability
    surface tension
    Opis:
    The micro air nucleus widely distributed in the ocean is a necessary condition for the cavitation of hydraulic machinery in seawater. In order to study the stability of air nucleus in seawater and cavitation inception, the computational domain of water molecules with air nucleus was studied using the method of molecular dynamics simulation, and the transient characteristics of air nucleus in liquid water were obtained. The key factors influencing nuclei stability were analyzed. The results showed that air nucleus with a certain mass could maintain the dynamic equilibrium in liquid water. The internal density of air nuclei had a critical value that allowed the nuclei to stably exist in water. The air nuclei mass was the decisive factor in its equilibrium volume in water, and the two were positively correlated. The internal density of air nuclei was negatively correlated with the nuclei radius when the nuclei was stable in water. Liquid surface tension was an important factor affecting the stability of the air nuclei. The larger the initial radius of nuclei, the smaller the water pressure, and the more likely the cavitation occurs.
    Źródło:
    Polish Maritime Research; 2018, S 3; 111-119
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    Tytuł:
    Simulation of climate change impacts on grain sorghum production grown under free air CO2 enrichment
    Autorzy:
    Fu, T.
    Ko, J.
    Wall, G.W.
    Pinter,Jr., P.J.
    Kimball, B.A.
    Ottman, M.J.
    Kim, H.-Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/26201.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    crop simulation
    climate change
    grain yield
    sorghum
    Sorghum bicolor
    productivity
    plant production
    carbon dioxide
    Źródło:
    International Agrophysics; 2016, 30, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The distribution of different virulence grass carp reovirus strains in some neglected tissues
    Autorzy:
    Liang, H.R.
    Fu, X.Z.
    Li, N.Q.
    Liu, L.H.
    Lin, Q.
    Li, Y.G.
    Peng, Y.A.
    Huang, Z.B.
    Wu, S.Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/30668.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Polish Journal of Veterinary Sciences; 2016, 19, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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