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	Hierarchical taxonomy preparation for text categorization using consistent bipartite spectral graph copartitioning
	Gao, B ; Liu, TY ; Feng, G ; Qin, T ; Cheng, QS ; Ma, WY
	2005
关键词	clustering data mining singular value decomposition text processing
英文摘要	Multiclass classification has been investigated for many years in the literature. Recently, the scales of real-world multiclass classification applications have become larger and larger. For example, there are hundreds of thousands of categories employed in the Open Directory Project (ODP) and the Yahoo! directory. In such cases, the scalability of classification methods turns out to be a major concern. To tackle this problem, hierarchical classification is proposed and widely adopted to get better trade-off between effectiveness and efficiency. Unfortunately, many data sets are not explicitly organized in hierarchical forms and, therefore, hierarchical classification cannot be used directly. In this paper, we propose a novel algorithm to automatically mine a hierarchical structure from the flat taxonomy of a data corpus as a preparation for the adoption of hierarchical classification. In particular, we first compute matrices to represent the relations among categories, documents, and terms. And, then, we cocluster the three substances at different scales through consistent bipartite spectral graph copartitioning, which is formulated as a generalized singular value decomposition problem. At last, a hierarchical taxonomy is constructed from the category clusters. Our experiments showed that the proposed algorithm could discover very reasonable taxonomy hierarchy and help improve the classification accuracy.; Computer Science, Artificial Intelligence; Computer Science, Information Systems; Engineering, Electrical & Electronic; SCI(E); CPCI-S(ISTP); 11
语种	英语
出处	SCI
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/314984]
专题	数学科学学院
推荐引用方式 GB/T 7714	Gao, B,Liu, TY,Feng, G,et al. Hierarchical taxonomy preparation for text categorization using consistent bipartite spectral graph copartitioning. 2005-01-01.

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