如果您是指宇宙诞生理论中的脉动学说(pulsation theory),那是指宇宙会周期性的膨胀、缩小,就像心脏跳动一般。之所以会如此,是因为宇宙的平均密度小于临界密度,所以当宇宙膨胀到一定...
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In this paper, multi multi variable non linear programming theory is used to optimize the design of piping systems for in flow pulsation reduction.
本文采用多变量非线性规划理论,研究适宜于管道系统降低气流脉动的优化方法。
The theory and experiment verifies that it is a good pulsating attenuator and has large attenuation amplitude and wide attenuation band to pressure pulsation of oil source.
理论及试验证实它对油源压力脉动衰减幅度大,衰减频带宽,是一种性能良好的脉动衰减器。
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