The method of bispectrum reconstruction detects fracture zones by learning the difference of frequency components because fracture can change the frequency components of seismic responses . the theory of time - frequency analysis computes the difference in the gradient direction of time - frequency spectrum 双谱重构的方法就是根据裂缝会改变地震波频率成分的基本想法,通过求取具有不同频率成分的地震波的差异来实现对裂缝发育带的检测的。