Generalized into local frequency from integral frequency, the method of joint time-frequency distribution effectively analyzes the signal based on the variation of frequency with time.
联合时频分布方法把整体频谱推广到局部频率，根据频率随着时间的变化情况，对信号进行有效的分析。
This method can be generalized to multi dimensional time frequency analysis of 3D seismic data.
这种方法为三维地震资料进行多维时频分析奠定基础。
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