文件名称：Language model
文件大小：556KB
文件格式：PPT
更新时间：2012-08-02 09:32:11
LM model, language model
Approach Infer a language model for each document. Estimate the probability of generating the query according to each of these models. Rank the documents according to these probabilities. Usually a unigram estimate of words is used. LM approach asssumes that documents and expressions of information problems are of the same type