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arXiv 1307.2669cs.IR
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基于相似性搜索的文本分类算法

Text Categorization via Similarity Search: An Efficient and Effective Novel Algorithm

Hubert Haoyang Duan, Vladimir Pestov, Varun Singla

摘要:

我们提出了一个文本分类的监督学习算法,该算法为作者团队带来了2012年网络安全数据采掘竞赛(CDMC'2012)文本分类部门的第二名和第三名。该算法与现有的方法有很大的不同,因为它是基于字典上的度量分布的度量空间中的相似性搜索。在预处理阶段,给定文本的标记学习样本,我们将问题空间中的每个类标签(文档类别)关联到一个点。与通常的聚类不同,这个点不是类别的质心,而是一个离群点,一个在特定领域单词选择上的均匀测量分布。在执行阶段,未标记的文本被分配一个文本类别,该文本类别由表示文本中单词频率分布的点的最近标记邻居定义。该算法是有效的和高效的,进一步证实了路透社21578数据集上的实验。

英文摘要:

We present a supervised learning algorithm for text categorization which has brought the team of authors the 2nd place in the text categorization division of the 2012 Cybersecurity Data Mining Competition (CDMC'2012) and a 3rd prize overall. The algorithm is quite different from existing approaches in that it is based on similarity search in the metric space of measure distributions on the dictionary. At the preprocessing stage, given a labeled learning sample of texts, we associate to every class label (document category) a point in the space of question. Unlike it is usual in clustering, this point is not a centroid of the category but rather an outlier, a uniform measure distribution on a selection of domain-specific words. At the execution stage, an unlabeled text is assigned a text category as defined by the closest labeled neighbour to the point representing the frequency distribution of the words in the text. The algorithm is both effective and efficient, as further confirmed by experiments on the Reuters 21578 dataset.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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