说明：  PCA理论及其在人脸识别中的应用.从理论及应用上对PCA的方方面面进行了详细讨论、研究，相信对研究、开发都有帮助。
(PCA theory and its applications to face recognition. From the theory and application of the PCA to all aspects of discussed in detail, research, I believe that research and development will help.)