Hilbert-Huang变换是一种处理非线性，非平稳数据的方法，该方法由EEMD和Hilbert谱分析构成。-Hilbert-Huang Transform(HHT) is a novel general time frequency method for analysing nonlinear and non-stationary time series, which was developed by Norden E. Huang,1998,and made up of two parts