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. Author manuscript; available in PMC: 2018 Nov 1.
Published in final edited form as: J Biomed Inform. 2017 Oct 3;75:122–127. doi: 10.1016/j.jbi.2017.09.014

Table 2.

Mean average precision of tf-idf (TFIDF), BM25, word vector centroid (CENTROID) and our semantic approach (SEM) on the TREC set.

Method TREC 2006 TREC 2007
TFIDF 0.3018 0.2375
BM25 0.3136 0.2463
CENTROID 0.2363 0.2459
SEM 0.3732 0.2601