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amat
2013 Mar 11
1
Implementation of the PL2 weighting scheme of the DFR Framework
Hello guys.I am working on implementing the PL2 weighting scheme of the DFR
framework by Gianni Amati.
It uses the Poisson approximation of the Binomial as the probabilistic
model (P), the Laplace law of succession to calculate the after effect of
sampling or the risk gain (L) and within document frequency normalization
H2(2) (as proposed by Amati in his PHD thesis).
The formula for w(t,d) in thi...