zhou_qi at sjtu
Nov 16, 2007, 9:24 PM
Post #1 of 1
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答复: 答复: how to effeciently implement the stastical scores like pagerank?
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It works. John and Michael Thank you very much.
Best Regards,
Zhou Qi
Dept. Computer Science & Engineering
Shanghai Jiaotong University
-----邮件原件-----
发件人: Michael Busch [mailto:buschmic[at]gmail.com]
发送时间: 2007年11月16日 2:34
收件人: java-user[at]lucene.apache.org
主题: Re: 答复: how to effeciently implement the stastical scores like pagerank?
John Wang wrote:
> Would payload work?
> -John
>
>
Yes, if you used payloads instead of stored fields your performance
should be much better.
Try and index one special term per document (e. g. score:pagerank), and
index one position with a payload for each doc. Then when you retrieve
hits open a TermPositions using the special term, get the payload and
incorporate it in the docs' score.
The performance overhead should be comparable to adding one AND-term to
your query.
-Michael
> 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
>>
>>
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