We have uploaded a new tutorial: Okapi BM25. See http://www.miislita.com/information-retrieval-tutorial/okapi-bm25-tutorial.pdf
This is a tutorial on the classic Okapi Best Match 25.
Enjoy it.
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A Tutorial on Okapi BM25
01 Friday Jul 2011
Posted in IR Tutorials, Queries
Nice tutorial, I would only suggest to mention: Simple BM25 Extension to Multiple Weighted Fields.
Good suggestion.
done, itman1975
http://irthoughts.wordpress.com/2011/08/03/new-tutorials-okapi-bm25f-and-bm25/
Great, thanks.