Table 4

Values of pmra parameters (λ, μ) estimated using different sets of MEDLINE citations.

Set Used

Size

λ

μ

P5


All assessed documents from TREC 2005 genomics track

39874

0.032

0.022

0.397°

Top 100 hits for every relevant citation, bm25

453402

0.023

0.013

0.398°

Top 100 hits for every template query, Indri

4991

0.022

0.012

0.397°

Top 1000 hits for every template query, Indri

49907

0.024

0.013

0.397°

Optimal parameters

0.022

0.013

0.399


We see that estimated values are close to optimal parameter values in many cases, and that differences in P5 performance are not statistically significant.

Lin and Wilbur BMC Bioinformatics 2007 8:423   doi:10.1186/1471-2105-8-423

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