Relatively familiar with the time domain, frequency domain is very helpful to understand and master the many effects of signal integrity between the two can be FFT conversion.

时域相对比较熟悉，频域则非常有助于理解和掌握许多信号完整性效应，两者之间可通过傅立叶变换相互转换。

youdao

The Du-conversion is one that converse the signal from time domain to gate-width domain and uses the wide spectrum density of the signal to show its characteristics.

杜氏变换是一种将信号从时域到门宽域的变换，用信号的宽谱密度来描述信号的特征。

youdao

A method for deriving the smoothed ground surface from CMP datum of static correction is given to form a common datum for velocity spectrum, time-depth conversion and depth migration in depth domain.

本文还给出了根据（静校正的）CMP基准面计算地表圆滑面的方法，统一了深度域中速度谱、时深转换和深度偏移的基准面。

youdao