说明：  EEMD源代码，能够预处理白噪声时间序列，对预测精度有很大提高，IMF的个数可以根据自己的要求来设置。我自己做的PM2.5数据，精度提高了很多。
(EEMD source code, can preprocessing white noise time series, the prediction accuracy is greatly improved, the IMF s number can be set according to their requirements.I made it myself PM2.5 data, have a much higher accuracy.)