Text feature extraction and representation is the fundamental operation for Chinese Text Filtering.
中文文本的特征项抽取和表示是中文文本过滤基础。
Text feature extraction and text categorization is the focal point of basic research in the field of intelligent information service system.
文本信息特征提取和文本分类是当前智能信息服务系统基础研究的重点。
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