结合PCA的尺度不变特征变换(SIFT)算法，数学方法是部分子空间法，D-S证据理论数据融合，基于分段非线性权重值的Pso算法，重要参数的提取，处理信号的时频分析，基于欧几里得距离的聚类分析。- Combined with PCA scale invariant feature transform (SIFT) algorithm, Mathematics is part of the subspace, D-S evidence theory data fusion, Based on piecewise nonlinear weight value Pso algorithm, Extract important parameters, When processing a signal frequency analysis, Clustering analysis based on Euclidean distance.