小波变换具有很好的时域和频域局部化特性，为以非稳态振动为特征的信号提供了有效的分析手段。
Wavelet transform possesses excellent characteristic of time frequency localization, and provides an effective measure for analysing signal causing unstable vibration.
小波变换具有很好的时域和频域局部化特性，它对以非稳态振动为特征的信号提供了很好的分析手段。
Wavelet transformation possesses excellent properties of time-frequency localization and thus provides an effective means for analyzing signals characterized by unstable vibration.
该模型充分考虑了由摇摆振动引起的附加惯性力的作用，属非稳态三维波动层流问题。
The model, which includes the effect of additional inertia forces by vacillation, describes a problem of unsteady three-dimension wavy laminar falling film absorption.
摘要：旋转机械测试中，振动信号通常是随机非稳态信号，必须进行振动和转速信号同步分析。
Absrtact: in rotary machinery test, vibration signal is stochastic and uncertain usually, so, synchronous analysis of vibration and instantaneous rotational speed in the rotary machinery is necessary.
摘要：旋转机械测试中，振动信号通常是随机非稳态信号，必须进行振动和转速信号同步分析。
Absrtact: in rotary machinery test, vibration signal is stochastic and uncertain usually, so, synchronous analysis of vibration and instantaneous rotational speed in the rotary machinery is necessary.
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