大学的接口原理PPT，很详细的哦，希望大家多多学习-Principle of the University of interface PPT, a very detailed Oh, I hope everyone to learn more

使用matlab进行仿真，还有pca降维，kl变换方法进行人脸识别的参考论文-Using MATLAB simulation, and the PCA dimension reduction, the KL transform method for face recognition reference papers