说明：  信号处理中的旋转不变子空间法，微分方程组数值解方法，包括邓氏关联度、绝对关联度、斜率关联度、改进绝对关联度。
( Signal Processing ESPRIT method, Numerical solution of differential equations method, Including Deng s correlation, absolute correlation, correlation of slope, improved absolute correlation.)