中文说明：有循环检测，周期性检测，均值便宜跟踪的示例，结合PCA的尺度不变特征变换(SIFT)算法，供做算法研究人员参考，包含特征值与特征向量的提取、训练样本以及最后的识别，预报误差法参数辨识-松弛的思想。
English Description：
Cycle detection, periodic detection and mean cheaper tracking example, combined with PCA scale invariant feature transform (SIFT) algorithm, for reference algorithm researchers, contain eigenvalues and eigenvector extraction, training samples and the final recognition and prediction error method for parameter identification - relaxation thought.