关键词: 文本分类, 向量空间模型, 特征提取, 机器学习 

Abstract: Text categorization based on machine learning is a widely used technology in the field of information retrieval and has gained many advances in recent years. The paper expounds the definition of text categorization and text representation, introduces some machine learning methods applied in text categorization and evaluation methods of text classifiers.

Key words: text categorization, vector space model, feature extraction, machine learning