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From "Dalton, Jeffery" <>
Subject RE: implementatin of the state-of-art retrieval models for lucene?
Date Tue, 06 Feb 2007 14:18:38 GMT
Hi Hui,

I would love to experiment with your retrieval models.  There have been
various conversations about BM25 and other functions, but little is
publicly available.  


- Jeff 

> -----Original Message-----
> From: Hui Fang [] 
> Sent: Thursday, February 01, 2007 11:42 PM
> To:
> Subject: implementatin of the state-of-art retrieval models 
> for lucene?
> Dear all,
> My primary research interest is Information retrieval, with a 
> focus on developing effective and robust retrieval models. I 
> am happy to send my first email to Lucene community.
> Lucene and nutch are really useful IR systems. But I think 
> that the current retrieval function implemented in Lucene 
> does not perform as well as other state-of-art retrieval 
> functions in terms of effectiveness.  I have implemented some 
> state-of-art models (such as pivoted normalization, okapi and 
> axiomatic retrieval models) on top of Lucene, and evaluated 
> these models and the default model implemented in Lucene 
> using standard IR evaluation methodology. Experiments show 
> that the state-of-art retrieval functions outperform the default one.
> Actually, this is one assignment my advisor and I designed 
> for our IR course.
> After posting this assignment online, quite a few IR 
> researchers contacted us and asked for the code of our 
> implementations.  So, we think that it might be beneficial to 
> everyone in the lucene community and IR research community, 
> if we could contribute our implementation of the state-of-art 
> retrieval functions to Lucene.
> I think that our contribution could help improve the 
> retrieval performance for both Lucene and nutch.
> What do you think?
> Thanks,
> -Hui

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