It is suggested that low frequency fluctuation occurs with cavitation inception in water hydraulic pump.
提出了在纯水液压泵中气蚀初生伴随着低频压力脉动现象。
The traditional direct torque control system has existed large torque fluctuation, poor performance of low speed region, inconstant switch frequency, etc.
传统的直接转矩控制存在着转矩脉动大，低速性能差、开关频率不固定等问题。
The single cylinder misfire can be also done by the frequency spectrum analysis of rotating speed fluctuation at both low and high speeds, but it can not be determined which cylinder is misfired.
利用瞬态曲轴转速波动进行时域分析可在低速时诊断出单缸熄火，在高速时由于波动的复杂性就难以做到。
The low-frequency fluctuation periods and the initial amplitudes have close relationship in the resonance interaction.
三波共振相互作用低频振荡周期与初始扰动振幅有很强的相关关系；
Pressure difference and Cd concentration fluctuation may cause the noise to increase many times with the latter mainly enhancing the noise in the low frequency range.
气压差及镉浓度波可使噪音增大很多倍，浓度波主要增强了低频噪音。
Dynamics of a semiconductor laser subject to moderate optical feedback operating in the low-frequency fluctuation regime is numerically investigated.
半导体激光器在适度光反馈条件下，在数值上研究出其低频波动区域的动态特性。
Dynamics of a semiconductor laser subject to moderate optical feedback operating in the low-frequency fluctuation regime is numerically investigated.
半导体激光器在适度光反馈条件下，在数值上研究出其低频波动区域的动态特性。
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