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Table 3 Q.E. using Lavrenko’s relevance model, feedback D.N. =(5−30)

From: Improving biomedical information retrieval by linear combinations of different query expansion techniques

MAP

DOC.

PASS.

ASP.

PASS2.

Baseline (Indri)

0.2571

0.0634

0.2008

0.0847

5

0.2866

0.0621

0.1806

0.0911

10

0.2796

0.0641

0.1910

0.0923

15

0.2791

0.0632

0.1866

0.0903

20

0.2778

0.0653

0.1842

0.0920

25

0.2747

0.0656

0.1893

0.0930

30

0.2761

0.0639

0.1908

0.0927

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BMC Bioinformatics

ISSN: 1471-2105

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