Abstract
Subtopic is the division for a topic again, and it isa novel research direction compared with topic. Subtopicidentification is the foundation for analysis of topicevolution relations. In this paper, we propose a novelmethod of Chinese story subtopic identificationincorporating content and time features. We focus onanalysis of subtopic content features of the story, and studythe computation of subtopic word weights, the dimensionreduction of subtopic words and the extraction of subtopicnames. Five topics including 20 subtopics are used toimplement the experiment. Experimental results show thatthe performance of the method proposed is better than theexisting subtopic identification methods.
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