A Keyword Selection Method Based on Lexical Chains
Shuying Cao · Zhongwen xinxi xuebao · 2006
Keywords are very useful for information retrieval,automatic summarizing,text clustering/classificationand so on.Alexical chain is a series of related words and primarily used in text structure analyzing.The paper propo-ses a lexical-chain-based keywords indexing method for Chinese texts.And,an algorithm for constructing lexicalchains based on HowNet knowledge database is given.In the method,lexical chains are firstly constructed by calcu-lating the semantic similarity between terms,then keywords are selected through taking account of term frequency andarea.The experimental results shows that the performance of the system has a notable improvement by considering se-mantic relationship between terms,and the precision can be improved by9.33 percent and the recall can be improvedby 7.78 percent compared with term frequency and area.