Query Difficulty, Robustness, and Selective Application of Query Expansion.

Giambattista Amati Claudio Carpineto Giovanni Romano

Published in: ECIR (2004)

Keyphrases

query expansion
retrieval effectiveness
query difficulty
information retrieval systems
pseudo relevance feedback
information retrieval
text retrieval
retrieval model
language modeling
relevance feedback
language model
relevant documents
automatic query expansion
average precision
biomedical information retrieval