基于机器学习的经济行业分类方法分析

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1、-------哈尔滨工业大学工程硕士学位论文informationthatcandiscriminatethetexttoimprovethesystemperformanceofourclassifier.Inthispaper,wedesignedamultiplelarge-scaletextcategorizationsystemforthesector(95)andindustries(3).Intheconditionofmulti-classandnoise,theresultshowsthattheaccuracyofindustrialClassification(top5)

2、is91.34%,theaccuracyofindustryclassification(top1)is94.26%,canmeetthepracticalrequirementsoflarge-scaletextcategory.Keywords:textclassification,economicsector,multiplecategories,chi-squaretest,rerank-III------------哈尔滨工业大学工程硕士学位论文目录摘要..................................................................

3、........................................................IABSTRACT...............................................................................................................II第1章绪论...........................................................................................................11.1课题背景及研

4、究的目的和意义.................................................................11.2文本分类及其相关理论的发展概况..........................................................31.2.1国内外文本分类技术发展概况................................................................31.2.2特征项选择方法概述.....................................................

5、...........................91.3本文的主要研究内容...............................................................................11第2章基于机器学习的经济行业划分方法研究.................................................132.1引言.......................................................................................................

6、.132.2国民经济行业划分原则..........................................................................142.2.1一般性原则..............................................................................................142.2.2行业分类的基本单位...............................................................................142.2.3确定

7、单位行业性质的基本原则...............................................................142.2.4国民经济行业划分原则小结...................................................................152.3经营范围描述详细情况分析.......................