局域均值分解法将一组非平稳信号分解为若干个PF信号和一个残余信号。可以将高频信号分解为低频信号，并且没有失真。(The local mean decomposition method decomposes a group of nonstationary signals into several PF signals and a residual signal. The high frequency signal can be decomposed into low frequency signals, and there is no distortion.)