关键词: 主题词抽取, 词共现, 主题抽取

Abstract: In order to overcome the shortcoming of traditional methods of subject extraction，such as the theme drifting and theme misjudging，a new keywords extraction algorithm based on co-occurrence analysis is proposed in this paper.The word’s weight is adjusted by its ability of associating with other words.The word that occurred with more words has greater impact and is extracted firstly.The experimental results show that the summarization generated by the improved algorithm gets better performance than other methods both in recall and precision.

Key words: keyword extraction, co-occurrence, subject extraction