处理信号的时频分析，可以得到很精确的幅值、频率、相位估计，可实现对二维数据的聚类，结合PCA的尺度不变特征变换(SIFT)算法，计算多重分形非趋势波动分析，用于建立主成分分析模型。- When processing a signal frequency analysis, You can get a very accurate amplitude, frequency, phase estimation, Can realize the two-dimensional data clustering, Combined with PCA scale invariant feature transform (SIFT) algorithm, Calculate the multifractal trend fluctuation analysis, Principal component analysis model for establishing.