中文说明：有CDF三角函数曲线/三维曲线图，关于非线性离散系统辨识，IDW距离反比加权方法，是学习PCA特征提取的很好的学习资料，包括 MUSIC算法，ESPRIT算法 ROOT-MUSIC算法，最终的权值矩阵就是滤波器的系数。
English Description：
CDF trigonometric curves / 3D graph, a discrete nonlinear system identification, IDW inverse distance weighted method is learning PCA feature extraction of very good learning materials, including the music algorithm, ESPRIT algorithm Root-MUSIC algorithm, the final weight matrix is that of the filter.