Table 1

Overall comparison between the bm25 and pmra models.
Run
 Model
 Description
 P5
 vs. bm25b
 bm25*
bm25b
 bm25 (k1 = 1.2, b = 0.75)
 bm25, default parameters
 0.381
-0.5%°
bm25*
 bm25 (k1 = 1.9, b = 1.00)
 bm25, optimal parameters
 0.383
 +0.5%°
pmra*
 pmra (λ = 0.022, μ = 0.013)
 pmra, optimal parameters
 0.399
 +4.7% **
 +4.2% **

Table shows model parameters, P5 values over the entire test collection, and relative differences.

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