hht变换，hht变换是利用经验模态来进行分解，从而进行信号分析。,HHT transform, hht transform is the use of empirical mode decomposition to carry out in order to carry out signal analysis.

python下的希尔伯特-黄变换包,用于非线性和非平稳时间序列的分解变换。(hht for python which is for decomposition and transformation for nonlinear and non-stationary time series .)