This effect can be measured in either the time domain by observing the rate of decay of voltage or in the frequency domain by measuring phase shifts between sinusoidal currents and voltages.

这个效应可以在时间域通过观测电压的衰变率来测量，也可以在频率域通过正弦电流和电压之间的相变来测量。

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By observing the periods of the target length variant, the frequency of nutation is deduced.

通过观测一维像序列的长度变化周期，提取目标的章动频率；

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Objective: To study the clinical value of high-frequency ultrasonography on observing the acute crush injury of sciatic nerve in rabbits.

目的：运用高频超声观察兔坐骨神经急性挤压伤，探讨其临床诊断价值。

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