| An improved TF-IDF approach for text classification |
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| 作者姓名： | 张云涛 龚玲 王永成 |
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| 作者单位： | [1]Network＆InformationCenter,ShanghaiJiaotongUniversity,Shanghai200030,China／／SchoolofElectronic＆InformationTechnologyShanghaiJiaotongUniversity,Shanghai200030,China [2]SchoolofElectronic＆InformationTechnologyShanghaiJiaotongUniversity,Shanghai200030,China |
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| 摘 要： | This paper presents a new improved term frequency/inverse document frequency (TF-IDF) approach which uses confidence, support and characteristic words to enhance the recall and precision of text classification. Synonyms defined by a lexicon are processed in the improved TF-IDF approach. We detailedly discuss and analyze the relationship among confidence, recall and precision. The experiments based on science and technology gave promising results that the new TF-IDF approach improves …
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| 关 键 词： | 文本处理 文本分析 TF-IDF 自动化 词语分级 出现频率 |
An improved TF-IDF approach for text classification |
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| Zhang Yun-tao,Gong Ling,Wang Yong-cheng.An improved TF-IDF approach for text classification[J].Journal of Zhejiang University Science,2005,6(1):49-55. |
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| Authors: | Zhang Yun-tao Gong Ling Wang Yong-cheng |
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| Institution: | (1) Network & Information Center, Shanghai Jiaotong University, 200030 Shanghai, China;(2) School of Electronic & Information Technology, Shanghai Jiaotong University, 20030 Shanghai, China |
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| Abstract: | This paper presents a new improved term frequency/inverse document frequency (TF-IDF) approach which uses confidence, support and characteristic words to enhance the recall and precision of text classification. Synonyms defined by a lexicon are processed in the improved TF-IDF approach. We detailedly discuss and analyze the relationship among confidence,recall and precision. The experiments based on science and technology gave promising results that the new TF-IDF approach improves the precision and recall of text classification compared with the conventional TF-IDF approach. |
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| Keywords: | Term frequency/inverse document frequency (TF-IDF) Text classification Confidence Support Characteristicwords |
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