cool list. Thanks Uwe. Opportunities to gain competitive advantage in selected domains.
> On Dec 14, 2015, at 6:02 PM, Uwe Schindler <u...@thetaphi.de> wrote: > > Hi, > > Next to BM25 and TF-IDF, Lucene also privides many more similarity > implementations: > > https://lucene.apache.org/core/5_4_0/core/org/apache/lucene/search/similarities/LMDirichletSimilarity.html > https://lucene.apache.org/core/5_4_0/core/org/apache/lucene/search/similarities/LMJelinekMercerSimilarity.html > https://lucene.apache.org/core/5_4_0/core/org/apache/lucene/search/similarities/IBSimilarity.html > https://lucene.apache.org/core/5_4_0/core/org/apache/lucene/search/similarities/DFRSimilarity.html > > If you want to implement your own, choose the closest one and implement the > formula as you described. I'll start with SimilarityBase, which is ideal base > class for such types like Dirichlet / DFR /..., because it has a default > implementation for stuff like phrases. > >> LMDiricletbut its feasibilit > > I am not sure what you want to say with this mistyped sentence fragment. > > Uwe > > ----- > Uwe Schindler > H.-H.-Meier-Allee 63, D-28213 Bremen > http://www.thetaphi.de > eMail: u...@thetaphi.de > >> -----Original Message----- >> From: Jack Krupansky [mailto:jack.krupan...@gmail.com] >> Sent: Monday, December 14, 2015 11:21 PM >> To: java-user@lucene.apache.org >> Subject: Re: Jensen–Shannon divergence >> >> Is there any particular reason that you find Lucene's builtin TF/IDF and >> BM25 similarity models insufficient for your needs? In any case, >> examination of their source code should get you started if you with to do >> your own: >> >> https://lucene.apache.org/core/5_3_0/core/org/apache/lucene/search/simi >> larities/TFIDFSimilarity.html >> https://lucene.apache.org/core/5_3_0/core/org/apache/lucene/search/simi >> larities/BM25Similarity.html >> >> -- Jack Krupansky >> >> On Sun, Dec 13, 2015 at 8:30 AM, Shay Hummel <shay.hum...@gmail.com> >> wrote: >> >>> Hi >>> >>> I need help to implement similarity between query model and document >> model. >>> I would like to use the JS-Divergence >>> <https://en.wikipedia.org/wiki/Jensen%E2%80%93Shannon_divergence> >> for >>> ranking documents. The documents and the query will be represented >>> according to the language models approach - specifically the LMDiriclet. >>> The similarity will be calculated using the JS-Div between the document >>> model and the query model. >>> Is it possible? >>> if so how? >>> >>> Thank you, >>> Shay Hummel >>> -- >>> Regards, >>> Shay Hummel >>> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
