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Re: relevance vs. score - Lucene - [mail # user]
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... I think for "ordinary" Lucene queries, "score" and "relevance" mean the same thing. But if you do eg function queries, or you "mixin" recency into your scoring, etc., then "score...
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..." could be anything you computed, a value from a field, etc. Mike wrote: ...
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Author: Michael McCandless,
2009-03-04, 12:30
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Re: Relevancy Practices - Lucene - [mail # user]
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...-of-the-box. Some of them could be improved with external NLP-tools. My biggest problem with relevancy is, that I can't work with metadata computed on the fly or every hour out of the box (okay, you...
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..., that Solr does not know that the most important word in this query is "Obama". It is only a shortcut of some ideas on how one can improve the relevancy with several features that Solr offers out...
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| ... presentation. Kind regards - Mitch View this message in context: http://lucene.472066.n3.nabble.com/Relevancy-Practices-tp765363p768902.html Sent from the Lucene - Java Users mailing list archive... |
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Author: MitchK,
2010-04-30, 21:16
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Re: Relevancy Practices - Solr - [mail # user]
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...-of-the-box. Some of them could be improved with external NLP-tools. My biggest problem with relevancy is, that I can't work with metadata computed on the fly or every hour out of the box (okay, you...
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..., that Solr does not know that the most important word in this query is "Obama". It is only a shortcut of some ideas on how one can improve the relevancy with several features that Solr offers out...
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| ... regards - Mitch View this message in context: http://lucene.472066.n3.nabble.com/Relevancy-Practices-tp765364p766456.html Sent from the Solr - User mailing list archive at Nabble.com. ... |
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Author: MitchK,
2010-04-29, 21:13
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Re: Open Source Relevance - Lucene - [mail # dev]
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... way that we could get computing resources to run the evaluations. No guarantees on that (I'm sure a Sun Lawyer's ears are burning somewhere right now, just for me having said that...
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Author: Stephen Green,
2008-05-21, 12:26
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Vector Model and Relevance Feedback - Lucene - [mail # user]
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...I've some thoughts about Lucene and Relevance Feedback. I want to implement some variation of the Roccio Formula and there is the problem. The formula is like this: Query(new) = alpha...
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... * Query(old) + beta * Sum(Relevant Documents) - gamma * Sum(Non Relevant Documents) The relevant documents in this formula should be in a vector representation. This is the problem If I work...
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| ... then the computation. So my questions are: Is this the only way to do so? ( I hope so not) Is there an add on for lucene to get a real vector representation? Does anyone has experiences with this issue? Thanks... |
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Author: Stefan Gusenbauer,
2005-11-02, 14:10
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RE: Relevance percentage - Lucene - [mail # user]
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...Query.BooleanWeight.explain(), which has the code to recompute coord on a result (specifically it computes overlap and maxoverlap and then calls Similarity.coord()). You could cut and paste this code to just compute coord...
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...:[EMAIL PROTECTED]] > Sent: Wednesday, December 22, 2004 11:59 PM > To: [EMAIL PROTECTED] > Subject: Re: Relevance percentage > > On Thursday 23 December 2004 08:13, Gururaja H...
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| ... with > > >generating the rest of the explanation). If you support the full > Lucene > > >query language, then you need to look at all the query types and > decide > > >what exactly you want to compute... |
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Author: Chuck Williams,
2004-12-23, 08:56
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Re: Relevance percentage - Lucene - [mail # user]
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... to worry about the computing efficiency. This has the advantage that the other scoring factors are still used for ranking. Since the other factors can vary quite a bit, it is difficult...
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Author: Gururaja H,
2004-12-21, 06:59
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RE: Relevance percentage - Lucene - [mail # user]
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... the rest of the explanation). If you support the full Lucene query language, then you need to look at all the query types and decide what exactly you want to compute (as coord is not always well...
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Author: Gururaja H,
2004-12-21, 07:06
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Re: Relevance percentage - Lucene - [mail # user]
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...'d first try values between 3.0f and 5.0f for SOME_POWER. The searching code precomputes all coord values once per query per search, so there is no need to worry about the computing efficiency...
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Author: Paul Elschot,
2004-12-20, 19:13
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RE: Relevance and ranking ... - Lucene - [mail # user]
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... of the lengthNorm() differences, by changing the sqrt() function in the computation of lengthNorm to something much flatter. E.g., you might use: public float lengthNorm(String fieldName, int num...
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... constant (1000 in the example). Some general things: 1. You need to reindex when you change the Similarity (it is used for indexing and searching -- e.g., the lengthNorm's are computed at index...
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Author: Gururaja H,
2004-12-21, 06:55
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