Research Article

Study of Query Expansion Techniques and Their Application in the Biomedical Information Retrieval

Table 10

Evaluation measures using query expansion with descriptors, applied in MeSH, Title, and Abstract fields.

Combinations Measures
MAP R-prec

Porter stemmer-NLM stopwords 0.3538 0.3791
Porter stemmer-SMART stopwords 0.3489 0.3766
Krovetz stemmer-NLM stopwords 0.3465 0.3750
Krovetz stemmer-SMART stopwords 0.3424 0.3732