【文件属性】:
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