Frequency-domain characterization 频域特征 frequency-domain convolution 频率域褶积 ; 频域卷积 frequency-domain sounding 频域测深 ; 频率域测深 .
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A frequency domain characterization method using low frequency ultrasound is put forward to estimate parameters of ultra thin elastic layers, such as: the sound velocity, thickness and density.
本文提出一种定量无损估计超薄弹性层声速、厚度和密度参数的低频超声波频域定征方法。
In this paper, the structural characterization of linear multivariable time-invariant systems without steady or structurally steady errors are demonstrated in the frequency domain.
本文用频域方法讨论了无静差和结构无静差系统的结构特征。
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