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    Wyświetlanie 1-4 z 4
    Tytuł:
    Desensitization by Pre-shocking in Heterogeneous Explosives and its Numerical Modelling
    Autorzy:
    Hussain, T.
    Yan, L.
    Fenglei, H.
    Yi, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/358221.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    shock desensitization
    desensitization criterion
    ignition and growth
    Lee-Tarver model
    detonation quenching
    reflected shock ignition
    EDC
    Opis:
    Desensitization caused by pre-shocking in heterogeneous explosives is discussed. The aim of this study was to find a simple numerical model that could reproduce the important features of previously reported shock desensitization experiments. After reviewing the previous experimental results and modelling efforts, an extension of the Lee-Tarver reactive flow model is proposed. The proposed desensitization model is based upon the experimentally determined desensitization criteria for explosives. The additional parameters required for this extension can be calibrated by experiment for a typical explosive. The new model has been implemented in the hydrodynamic code LS-DYNA as a user defined equation of state, and is now available to simulate various kinds of situations involving explosives up to the limits and capabilities of LS-DYNA. Desensitization by pre-shocking in double shock experiments, reflected shock and detonation quenching experiments have been studied using the new model, and the results were found to be in qualitative agreement with the experimental results reported in the literature.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 2; 357-379
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison and Analysis of Magnetic-Geared Permanent Magnet Electrical Machine at No-Load
    Autorzy:
    Liu, X.
    Chen, D.
    Yi, L.
    Zhang, Ch.
    Wang, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/140663.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnetic gear
    MGPM electrical machine
    quantitative comparison
    finite element analysis
    no load
    Opis:
    Magnetic-geared permanent magnet (MGPM) electrical machine is a new type of machine by incorporating magnetic gear into PM electrical machine, and it may be in operation with low-speed, high-torque and direct-driven. In this paper, three types of MGPM machines are present, and a quantitative comparison among them is performed by finite element analysis (FEA). The magnetic field distribution, stable torque and back EMF are obtained at no-load. The results show that three types of MGPM machine are suitable for different application fields respectively according to their own advantages, such as high torque and back EMF, which form an important foundation for MGPM electrical machine research.
    Źródło:
    Archives of Electrical Engineering; 2014, 63, 4; 683-692
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Barycenter reflected equatorial Pacific sea level structure evolution and its indication of ENSO events
    Autorzy:
    Luo, W.
    Yi, L.
    Yu, Z.
    Sun, H.
    Yuan, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/49107.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    sea level
    El Nino-Southern Oscillation
    Equatorial Pacific
    satellite altimetry
    principal tensor analysis
    barycenter method
    Źródło:
    Oceanologia; 2015, 57, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physiological adaptations to osmotic stress and characterization of a polyethylene glycol-responsive gene in Braya humilis
    Autorzy:
    Lirong, W.
    Pengshan, Z.
    Xin, Z.
    Xiaopeng, W.
    Xiaofei, M.
    Yi, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/58230.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    physiological adaptation
    osmotic stress
    polyethylene glycol
    gene
    Braya humilis
    drought
    expression pattern
    Opis:
    Braya humilis (Brassicaceae) is a widely distributed plant in arid and semi-arid regions of northern Asia. This plant is well adapted to extremely arid conditions and is a promising candidate species to discover novel drought tolerance strategies. However, not much information about the mechanism(s) mediating drought resistance in this species is currently available. Therefore, the present study aimed to characterize the physiological traits and expression patterns of a polyethylene glycol (PEG)-responsive gene in B. humilis responding to different levels of osmotic stress induced by PEG-6000. Several important physiological parameters were examined, including the levels of relative water content, soluble protein, malondialdehyde, and antioxidant enzyme activity. A tolerance threshold between 20 and 30% PEG-6000 was identified for B. humilis. The water status and oxidative damage below this threshold were maintained at a relatively constant level during the 12 h of treatment. However, once the threshold was exceeded, the water status and oxidative damage were obviously affected after treatment for 4 h. The soluble protein results suggest that B. humilis maintains a vigorous resistance to osmotic stress and that it may play a greater role in osmotic regulation at late stages of stress. Moreover, superoxide dismutase and catalase may be important at preventing oxidative damage in plants at early stages of stress, while peroxidase may be more involved in some biological processes that resist osmotic stress at the late stage, especially in severely damaged plants. Furthermore, a PEG-responsive gene, BhCIPK12, was identified by differential display reverse transcription-polymerase chain reaction (PCR), cloned, and characterized by quantitative real-time PCR. We hypothesized that this gene may play an important role in mediating osmotic stress or drought resistance in plants. Altogether, these results provide valuable insights into the mechanism(s) mediating drought tolerance in B. humilis.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2016, 85, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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