document information短语⁸⁵⁹⁷ 基本例句 文献信息 A class information feature selection method is proposed, in which the class information of the training document is taken into account while keeping as much document information as possible. 提出一种基于类别信息的特征选择方法，该方法在尽量保留文档信息的同时，考虑了文档的类别信息。 cnki