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Table 5 Q.E. using Lavrenko’s relevance model, feedback T.N. =(10−60)

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

10

0.2866

0.0621

0.1806

0.0911

20

0.2938

0.0645

0.1894

0.0919

30

0.2973

0.0667

0.1945

0.0953

40

0.2980

0.0669

0.1942

0.0948

50

0.2985

0.0673

0.1920

0.0944

60

0.2982

0.0675

0.1932

0.0945

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BMC Bioinformatics

ISSN: 1471-2105

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