A calculation method of the sentence similarity in information retrieval
Yunfan Liu · Applied science and technology · 2014
In order to improve the precision ratio of retrieval results in information retrieval,a calculation method of the sentence similarity based on the syntactic analysis and weighted path length is been proposed. In this method,firstly,word segmentation,part-of-speech tagging and syntactic analysis are processed for a user question. According to the processing result of the user question,the extraction,weighting,synonyms expansion and homoionym expansion are conducted for the keywords in this user question. Then the method based on weighted path length calculation is proposed in this paper. Using this method,the similarity between the user question and retrieval of information title words is calculated. The similarity also can be regarded as the relative ratio between the weighted path length of taglines and weighted path length of questions. Therefore,relying on the similarities,retrieval results is secondarily sorted and the recall and precision of results of information retrieval are improved. Experiments show that this method of sentence similarity calculation can improve the precision of retrieved result in information retrieval.