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Table 15 Best results for different Q.E.

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

Expansions with different parameters

DOC. MAP

Baseline (Indri)

0.2571

Previous study

0.2906

Feedback D.N. = 5

0.2866

Feedback T.N. =40

0.2980

Feedback Weight = 0.7

0.2974

M.F.T. D.N. = 20

0.2729

M.F.T. T.N. = 20

0.2720

MetaMap Thesaurus T.N. = 3

0.1611

MetaMap Thesaurus Unordered T.N.

0.1554

PubMed Dictionary T.N. = 10

0.2014

PubMed Dictionary T.N. = 5

0.2199