5Ponte J, Croft W. A language modeling approach to information retrieval [C] //Proc of the 21st ACM Conf on Research and Development in Information Retrieval (SIGIR'98). New York: ACM, 1998:222-229.
6Richardson R, Smeaton A. Using Wordnet in a knowledgebased approach to information retrieval, ca-0395 [R]. Dublin: Trinity College Dublin, 1995.
7Lin D-K, Zhao S-J. Identifying synonyms among distributionally similar words [C]//Proc of Int Joint Conf of Artificial Intelligence (IJCAI2003). Acapuleo: Elsevier, 2003:Ⅰ492-Ⅰ493.
8Xu J, Croft W. Query expansion using local and global document analysis [C] //Proc of the 19th Annual Int ACM SIGIR Conf on Research and Development in Information Retrieval. New York: ACM, 1996:4-11.
9Li Dekang. Dependency-based evaluation of MINIPAR [C] // Proc of the Workshop on the Evaluation of Parsing Systems. Granada: ELAR, 1998:298-312.
10Peat H, Willett P. The limitations of term co-occurrence data for query expansion in document retrieval systems [J]. Journal of the American Society for Information Science, 1991, 42(5) : 378-383.