Displaying 2 results from an estimated 2 matches for "w_sum".
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2013 Jun 20
2
Dealing with negative weights
Hello guys. I am currently working on the DLH weighting scheme .The formula
for DLH is very complex and it ends up giving negative weights to some
documents because of the formula.Due to this,inspite of having
occurence/occurences of the keyword, the documents with negative weights
don't show up in the results at all. Please can I get some help on how to
deal with this ? Or should I just leave
2013 Jun 22
2
Dealing with negative weights
...bound and adjusting the term-independent component to
> compensate for the terms which don't match each document.
>
> E.g. if the weight contributed by query term t in doc d is W(t,d) and
> Wi(d) is the term independent component, then the weight for document d
> is:
>
> W_sum(d) = Sum{t in d}(W(t,d)) + Wi(d)
>
> If we have a lower bound for W(t,d):
>
> (a) W_low(t) <= W(t,d) for all d
>
> And it's negative (or if the weight for a given term is always >= 0,
> just make this lower bound zero):
>
> (b) W_low(t) <= 0
>
> And...