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    Wyświetlanie 1-3 z 3
    Tytuł:
    A method of identification of complex cutting forces acting in unstable cutting process
    Autorzy:
    Bach, P.
    Polacek, M.
    Chvojka, P.
    Burian, D.
    Drobilek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/99872.pdf
    Data publikacji:
    2014
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    chatter
    stability inaccuracy
    complex cutting forces
    forces identification
    Opis:
    The calculations of machining stability limit currently known do not provide a precise prediction of chatter-free cutting conditions. The inaccuracy is probably caused by mathematical models of dynamic forces acting on the cutting process during unstable machining. These models need to be modified. A new analysis of experimental data measured by one of the authors, M. Poláček, in the 1968-1974 period, forecasted an existence of several dynamic forces, which are mutually phase-shifted, thus complex. This fact has not been thoroughly investigated previously. As the assumed forces cannot be calculated from any equations, they must be identified experimentally. This research paper proposes a theoretical method of an experimental identification of these forces. The new model is intended to be used in the future for the development of a more accurate calculation of stability diagram.
    Źródło:
    Journal of Machine Engineering; 2014, 14, 4; 18-28
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The assurance of liquidity in a small enterprise by the application of reverse approach
    Autorzy:
    Kluge, P. D.
    Relich, M.
    Bach, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/118251.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    liquidity
    reverse approach
    neural networks
    Opis:
    This paper presents how to assure the desirable liquidity level in a small enterprise with the application of the reverse approach. It is an alternative approach as compared to the ones that have been applied so far and which were based on the setting conditions required to obtain the desirable financial liquidity level. The example analysed in this paper led to the comparison of the conventional approach results with the reverse approach results.
    Źródło:
    Applied Computer Science; 2006, 2, 2; 117-128
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Involvement of phenolic compounds in anaerobic flooding germination of rice (Oryza sativa L.)
    Autorzy:
    Khang, D.T.
    Ha, P.T.T.
    Lang, N.T.
    Tuyen, P.T.
    Minh, L.T.
    Minh, T.N.
    Bach, D.T.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11377.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    By this study, thirty rice varieties were evaluated for anaerobic flooding tolerance using the direct sowing method. Phenolic profiles of strong and weak tolerant varieties were identified and compared based on HPLC chromatograms. The germination rates and shoot heights of rice were recorded for calculating the seedling vigor, which indicate the tolerant ability of rice in flooding condition. The results revealed a high variation of germination rate (10.01 to 100%), shoot height (0.35 to 78.17 mm) and seedling vigor (0.05 to 72.83). There was a high correlation between (r = 0.71) germination rate in 5 cm and 10 cm flood. Phenolic and flavonoid contents of the strong tolerant cultivar significantly and proportionally increased in the flooding levels (5 cm and 10 cm). There was a total difference in terms of number of phenolic acids found in the strong and weak tolerant varieties. In particular, six phenolic acids (gallic acid, catechol, caffeic acid, syringic acid, vanillin, and ellagic acid) were only identified with high concentration in the strong tolerant cultivar. The findings suggest that the phenolics presented in the strong tolerant varieties probably have a certain function in response and adaptation to anaerobic flooding condition. Further researches on exogenous application of these phenolic acids to increase the flooding tolerant level of rice should be continued at both green house and field treatments.
    Źródło:
    International Letters of Natural Sciences; 2016, 56
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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