Detailed scoring formula Lucene (TFIDFSimilarity)

Others 2019-08-01 14:13:11 views: null

Part I. Theoretical basis

一、Boolean Model

Two, TF / IDF

1、TF（Term frequency）

2、IDF（Inverse document frequency）

3、Field-length norm

三、Vector Space Model

Part II. TFIDFSimilarity

The concept formula:

The actual formula:

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Origin www.cnblogs.com/philo-x/p/11280313.html

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