3篇
您的检索式：作者名="Ren Keming"
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| 1 | Power flows of three non-conservatively series-coupled oscillators, Part Ⅱ: Numerical analysis显示文摘The direct and indirect power flows among three non-conservatively series-coupled oscillators subjected to random forces have been investigated by the numerical method. The relationship between the power flows and the parameters of the oscillators and couplings have been studied. It is shown that the indirect power flow is caused by the resonant transmission between the indirectly coupled oscillators. Once the parameters of the oscillator elements have been settled, the indirect power flow is mainly determined by the coupling stiffness k3 and k4, and is less infiuenced by coupling dampings c3 and c4. The indirect power flow cannot be ignored in strong coupling conditions. Because of the resonant transmission between the indirectly coupled oscillators, the indirect power flow still cannot be neglected even if the coupling stiffness is relatively small and the coupling damping is relatively | WANG Minqing(Xi’an Jiaotong University Xi’an 710049)SHENG Meiping Ren Keming SUN Jincai(Institute of Acoustics Engineering, Northwestern Polgtechnical University Xi’an 710072) | 1998 | Chinese Journal of Acoustics1998，17，3： | 4 |
| 2 | Power flows of three non-conservatively series-coupled oscillators,Part Ⅰ:Theory显示文摘The formulae of power flows among three non-conservatively series-coupled oscillators have been derived. It is shown that the power flows among the three non-conservatively series-coupled oscillators, similar to that of the three conservatively series-coupled oscillators,include the direct and indirect power flows. The direct and indirect power flows are proportional to the differences of the stored energies in the directly coupled and indirectly coupled oscillators. The proportionality constants are functions of parameters of the oscillators and | WANG Minqing(Xi’an Jiaotong University Xi’an 710049)SHENG Meiping REN Keming SUN Jincai(Institute of Acoustical Engzneering, Northwestern Polytechnical University Xi’an 710072) | 1998 | Chinese Journal of Acoustics1998，17，3： | 1 |
| 3 | Successful Cultivation of Albino Mauremys mutica for the First Time显示文摘Artificial albino Mauremys mutica was bred by a wild female albino M.mutica(P).F1 progeny was bred by mating between albino female turtle(P)and common male turtle,and F2 progeny was bred by mating between mature F1 male turtle with albino female turtle(P).After 7-8 years of cultivation,the artificial albino M.mutica was successfully produced from the F3 progeny bred in 2007,which was the first artificial breeding of the albino M.mutica.Through the cultivation of 18 batches of 5 generations(F5),the emergence rate of albino M.mutica reached more than 85%,and it could reach 100%in some cases.A stable albino M.mutica gene was produced for the first time. | Zhenming REN Keming REN Shaoming REN Bingjing LIU Yue ZHAO | 2020 | Asian Agricultural Research2020，12，8： | 0 |
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