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基于DF和CHI的联合特征提取方法及其应用

Keywords: 文档频率,CHI统计,联合特征选取,网页分类

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Abstract:

分析了与类别信息有关的CHI统计特征选取方法和与类别无关的文档频率特征选取方法,在此基础上提出文档频率与CHI统计相结合的特征提取方法,以选取分类能力强的词项特征,从而提高网页分类效果.以该联合特征提取方法为基础构建的网页分类系统,在参加SEWM2007分类评测的8个代表队中,取得Macro-F1值排名第3的成绩.

References

[1]  北京大学网络与分布式实验室.2007全国搜索引擎与网上信息挖掘研讨会(SEWM)中文分类评测指南[DB-OL].[2006-10-01].http://www.cwirf.org/2007WebTrack/SEWM2007ClassificationTrackGuide.pdf.
[2]  龚笔洪.SEWM'07中文网页分类评测汇总[DB-OL].[2007-03-01].http://www.cwirf.org/2007WebTrack/cct/ sewm07.ppt.
[3]  代六玲,黄河燕,陈肇雄.中文文本分类中特征抽取方法的比较研究[J].中文信息学报,2004(1):26-33.DAI Liu-ling,HUANG He-yan,CHEN Zhao-xiong.A comparative study on feature selection in Chinese text categorization [J].Journal of Chinese Information Processing,2004(1):26-33.(in Chinese)
[4]  YANG Yi-ming,JAN O P.A Comparative Study on Feature Selection in Text Categorization[C]//Proceedings of the Fourteenth International Conference on Machine learning.Nashville:Morgan Kaufmann,1997:412-420.
[5]  ZHENG Zhao-hui,WU Xiao-yun,ROLINI S.Feature selection for text categorization on imbalanced data[J].ACM SIGKDD Explorations Newsletter,2004,6(1):80-89.
[6]  SALTON G.Introduction to modem information retrieval[M].New York:McGraw Hill Book Company,1983.
[7]  单松巍,冯是聪,李晓明.几种典型特征选取方法在中文分类上的效果比较[J].计算机工程与应用,2003,22:146- 148.SHAN Song-wei,FENG Shi-cong,LI Xiao-ming.A comparative study on several typical feature selection methods for Chinese web page categorization[J].Computer Engineering and Applications,2003,22:146-148.(in Chinese)
[8]  MLADEMNIC D,GROBELNIK M.Feature selection for unbalanced class distribution and naive bayees[C]//Proceedings of the Sixteenth International Conference on Machine Learning.Bled:Morgan Kaufmann,1999:258-267.
[9]  王梦云,曹素青.基于字频向量的中文文本自动分类系统[J].情报学报,2000,19(6):644-649.WANG Meng-yun,CAO Su-qing.The system for automatic text categorization based on Chinese character vector [J]. Journal of the China Society For Scientific and Technical Information,2000,19(6):644-649.(in Chinese)
[10]  VAPNIK V.The nature of statistical theory[M].New York:Aringer,1995.

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