2Mooers C.Application of random codes to the gathering of statistical information.M.S.Thesis.Massachusetts Institute of Technology,1948.
3Raeza-Yates R,Ribeiro-Nero B.Modern information retrieval.Massachusetts:Addison Wesley,1999.
4Wong S K M,Ziarko W,Wong P C N.Generalized vector space model in information retrieval,In:Proceedings of the 8th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR'85).Montreal,Canada,1985:18-25.
5Wilkinson R,Hingston P.Using the cosine measure in a neural network for document retrieval.In:Proceedings of 14th Annual International ACM SIGIR Cenference on Research and Development in Information Retrieval (SIGIR'91).Chicago,USA,1991:202-210.
6Turtle H,Croft W B.Evaluation of an inference network-based retrieval model.ACM Transactions on Information Systems,1991,9(3):187-222.
7Berthier A,Riheiro-Nero,Muntz R.A belief network model for IR.In:Proceedings of 19th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR'96).Zurich,Switzerland,1996:253-260.
8Croft W B,Lafferty J (Eds.).Language modeling for information retrieval.Nethedands:Kluwer Academic Publishers,2003:4-6.
9Ponte J M,Croft W B.A language modeling approach to information retrieval.In:Proceedings of the 21st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR'98).Melbourne,Australia,1998:275-281.
10Miller D R H,Leek T,Schwartz R M.A hidden markov model information retrieval system.In:Proceedings of the 22nd Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SICIR'99).Berkeley,USA,1999:214-221.
