This notion of inter-domain transformation is useful in many fields of study-for example, moving from the time domain into the frequency domain in the field of signal processing.
这种域间转换的概念在很多领域的学习中都很有用—例如，信号处理领域中从时间域移入频率域。
Time frequency analysis method is used to analyze the time domain and frequency domain of seismic waves at the same time according to the principle of wavelet transformation.
时频分析方法是利用小波变换原理，从地震波的时间域和频率域同时对其作出分析。
Fourier transformation in time domain and frequency domain is one of the main methods for modern railway signal detection.
时域分析和傅氏变换的频域分析方法是现代铁路信号检测的主要方法之一。
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