应用小区域方差对比，程序简单，结合PCA的尺度不变特征变换(SIFT)算法，最大似然（ML）准则和最大后验概率（MAP）准则，到达过程是的泊松过程，信号处理中的旋转不变子空间法，时间序列数据分析中的梅林变换工具。- Application of small area variance comparison, simple procedures, Combined with PCA scale invariant feature transform (SIFT) algorithm, Maximum Likelihood (ML) criteria and maximum a posteriori (MAP) criterion, Arrival process is a Poisson process, Signal Processing ESPRIT method, Time series data analysis Mellin transform tool.