中文说明：是学习PCA特征提取的很好的学习资料，IDW距离反比加权方法，应用小区域方差对比，程序简单，均值便宜跟踪的示例，感应双馈发电机系统的仿真，预报误差法参数辨识-松弛的思想。
English Description：
Feature extraction of PCA are learning good study material, IDW inverse distance weighting method, small regional variance correlation, simple, cheap tracking example, induction doubly-fed induction generator system simulation, parameter identification of prediction error method-loose ideas.