采用累计贡献率的方法，可以广泛的应用于数据预测及数据分析,用于信号特征提取、信号消噪，一种噪声辅助数据分析方法,对信号进行频谱分析及滤波。- The method of cumulative contribution rate Can be widely used in data analysis and forecast data, For feature extraction, signal de-noising, A noise auxiliary data analysis method, The signal spectral analysis and filtering.