按照模式相似性测度算法计算待测样品与样品库中的样品相似度，包括模块匹配法、基于PCA的模块匹配法、基于类中心的欧氏距离法和马氏距离法-Similarity measure in accordance with the mode algorithm to calculate the sample similarity in the sample and sample libraries , including the module matching method based on PCA module matching method , based on the class center of Euclidean distance and Mahalanobis distance