Op maandag 31 mei 2010 23:53:45 schreef y...@ualberta: > Hi! > > I have a question about the function in org.apache.lucene.search.Similarity. > Which paper is the original one that proposed the coord(q, d) factor for > vector space model IR? > I came up a similar idea when using BM25, then I found it was already in the > Lucene package. I'm writing a paper now, and want to know which paper I > should refer to. > Thank you! > > Ying >
http://en.wikipedia.org/wiki/Karen_Sp%C3%A4rck_Jones This paper of 1972 is linked there, it mentions co-ordination levels: http://www.soi.city.ac.uk/~ser/idfpapers/ksj_orig.pdf and it appears to be a nice start to look for the first paper on this. Regards, Paul Elschot --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
