search for: w_low

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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
...atch 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 similarly for Wi(d): > > (c) Wi_low <= Wi(d) for all d > > And let's only adjust...