A Survey of Text Information Retrieval Model

Text information retrieval is one of the important branches in information retrieval. With the fast expansion of the information in internet, how to retrieval the information which users need becomes more and more important. Text information retrieval model is the key technology in text information retrieval, and its performance directly reflects the quality of retrieval results in search engine. This paper introduces several state-of-art retrieval models and analysis the advantages and disadvantages of them.