基于大数据挖掘技术的文本分类研究
2020-09-21孟鑫淼
孟鑫淼



摘 要: 文本数据具有规模大、特征维数高等特点,当前文本分类方法无法刻画文本变化特点,使得文本分类正确率低、误差大、分类时间长,为了获得理想的文本分类效果,设计基于大数据挖掘技术的文本分类方法。首先对当前文本分类的研究进展进行分析,找出导致当前文本分类效果差的原因;然后,提取文本分类原始特征,并引入核主成分分析算法对原始特征进行处理,降低特征维数,简化文本分类器的结构;最后,采用大数据挖掘技术构建文本分类器,并与其他文本分类方法进行对比测试。测试结果表明,所提方法可以更好地描述文本变化特点,能够对各种类型文本进行准确识别和分类,文本分类精度超过95%,明显高于当前其他文本分类方法,并且所提方法的文本分类时间显著减少,具有更好的文本分类效果。
关键词: 大规模文本数据; 高维特征; 大数据挖掘技术; 文本分类器; 分类精度; 分类时间
中图分类号: TN911.1?34; TP391.9 文献标识码: A 文章编号: 1004?373X(2020)17?0126?04
Abstract: Text data are of characteristics of large scale and high feature dimension. The current text classification methods fail to depict the characteristics of text change, which results in low accuracy, large error and long duration of the classification. In order to get an ideal text classification effect, a text classification method based on big data mining technology is designed. The current research progress of text classification is analyzed to find out the reasons for the poor effect of current text classification. And then, the original features of text classification are extracted, and the kernel principal component analysis (KPCA) algorithm is introduced to process the original features, reduce the feature dimension and simplify the structure of text categorizer. Finally, the text categorizer is constructed with big data mining technology and compared with other text classifiers. The results of contrastive test show that the proposed method can better describe the characteristics of text change, and accurately recognize and classify various types of texts. The accuracy of text classification of the proposed method is above 95%, which is significantly higher than other current text classification methods. Moreover, the classification duration is significantly reduced and the classification effect is better.
Keywords: large?scale text data; high?dimensional feature; big data mining technology; text classifier; classification accuracy; classification duration
0 引 言
随着互联网技术的不断成熟和迅速发展,每天会产生大量的数据,其中电子文本是一种最常用的数据形式,可以采用网页、邮件、微博等形式表示[1?3]。相比普通文本,电子文本是一种自然、非结构的数据,如何从大量的电子文本中找到用户真正想要的数据至关重要。文本分类是快速、准确搜索电子文本的基础,因此,如何建立更优的文本分类方法具有十分重要的意义[4?6]。
在20世纪中期,一……
