john.wang at gmail
Nov 15, 2007, 7:03 AM
Post #2 of 3
(190 views)
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Re: : how to effeciently implement the stastical scores like pagerank?
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Would payload work?
-John
On 11/15/07, Zhou Qi <zhou_qi[at]sjtu.edu.cn> wrote:
>
> Thank you, my score is fixed score from the properties of the page, but at
> first we need to adjust the score for a promising result.
> I have tried one way of manually re-ranking all the documents by the
> search results. But it needs to iterate all the retrieved results and fetch
> the re-ranking score (stored in the index) to sum the overall score. It is
> inefficient. How to improve that by a new approach?
>
> Sorry for making you misunderstanding. Thanks
>
> Best Regards,
>
> Zhou Qi
> Dept. Computer Science & Engineering
> Shanghai Jiaotong University
>
>
> -----ʼԭ-----
> : Chee Wu [mailto:chee.wu[at]gmail.com]
> ʱ: 20071115 14:23
> ռ: java-user[at]lucene.apache.org
> : Re: how to effeciently implement the stastical scores like pagerank?
>
> Not sure with what you want to do ..
> There are many factors can affect the rank of documents.Some factors
> should
> be fixed, always the same for different query words ,such as PageRank and
> the ratio between amount of the links and the full text length of the
> pages,and VSM should be a dynamic factor..
>
> So how do you want to implement your own score mechanism, just import some
> new factors or a completely new way? If add new factor, then a fixed one
> or
> a dynamic one ?
>
>
>
> 2007/11/15, Zhou Qi <zhou_qi[at]sjtu.edu.cn>:
> >
> > Hi Guys,
> >
> >
> >
> > I made a problem in implement some extra scores besides the VSM
> > model. My works entails with re-ranking the returned documents from the
> > extra scores like page quality or page property ( good page or navigator
> > page). I have tried two approaches before:
> >
> > A. Setting the document boosting attribute in indexing, but it is
> > hard
> > to adjust these weight after indexing the documents.
> >
> > B. The second way is to retrieve all the documents and getting the
> > score first, and then I will need to iterate all the documents to fetch
> > some
> > store fields to get the property of the page to compute the re-ranking
> > score. From the experiments before, this way takes too much time and it
> > will
> > need to iterate all the documents to re-ranking. This implementation is
> > easy
> > to adjust the ranking algorithem but it is too slow.
> >
> > Can anyone give a better solution to do that? Thanks in advance.
> >
> >
> >
> > Best Regards,
> >
> >
> >
> > Zhou Qi
> >
> > Dept. Computer Science & Engineering
> >
> > Shanghai Jiaotong University
> >
> >
> >
> >
> >
> >
>
>
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