摘要
提出一种基于词汇链的关键词抽取方法。该方法通过构造词汇链来描述技术路线图的技术领域主题内容,并将词汇链作为表征技术路线图中领域关键词、核心技术关键词及其语义关系的词汇序列。实验表明该方法抽取的关键词能够更全面地揭示技术路线图的技术领域主题内容,其抽词结果的准确率和召回率较TF-IDF方法有明显的提高。
The paper proposes a method to extract the keyword based on the lexical chains. The method can describe the technical field topics in the technology roadmap by constructing lexieal chains, and regard the lexical chains as semantic relations of keyword in the technical field. The experiment shows that this method can extract the keyword to reveal the content of technical field in technology roadmap more comprehensively, and can significantly improve the precision and recall rate than TF - IDF.
出处
《现代图书情报技术》
CSSCI
北大核心
2013年第1期50-56,共7页
New Technology of Library and Information Service
