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From "Robert Muir (Commented) (JIRA)" <>
Subject [jira] [Commented] (LUCENE-3566) Parametrizing H1 and H2
Date Mon, 07 Nov 2011 11:56:51 GMT


Robert Muir commented on LUCENE-3566:

+1, lets add these.

i didnt think H1 took params (the thesis says 'Therefore, the constant of C is 1 assuming
H1', then defines it without C). did the IB paper make a mistake? 

either way, it wont hurt anything to add the parameter, just confusing :)
> Parametrizing H1 and H2
> -----------------------
>                 Key: LUCENE-3566
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: core/search
>    Affects Versions: flexscoring branch
>            Reporter: David Mark Nemeskey
>            Assignee: David Mark Nemeskey
>            Priority: Minor
>              Labels: score
>             Fix For: flexscoring branch
>         Attachments: LUCENE-3566.patch
>   Original Estimate: 1h
>  Remaining Estimate: 1h
> The DFR normalizations {{H1}} and {{H2}} are parameter-free. This is in line with the
[original article|], but not
with the [thesis|], where H2 accepts a {{c}} parameter, nor with
[information-based models|], where H1 also accepts
a {{c}} parameter.

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