是学习PCA特征提取的很好的学习资料，包含位置式PID算法、积分分离式PID，毕业设计有用，matlab小波分析程序，能量熵的计算，Matlab实现界面友好。- Is a good learning materials to learn PCA feature extraction, It contains positional PID algorithm, integral separate PID, Graduation useful matlab wavelet analysis program, Energy entropy calculation, Matlab to achieve user-friendly.