Keyphrases
- query expansion
- information retrieval systems
- information retrieval
- retrieval effectiveness
- language modeling
- text retrieval
- pseudo relevance feedback
- improving search
- language model
- relevance feedback
- interactive query expansion
- automatic query expansion
- relevant documents
- ranked retrieval
- retrieval model
- web corpora
- ad hoc retrieval
- machine learning
- query disambiguation
- model for information retrieval
- original query
- query terms
- short queries
- term selection
- document ranking
- retrieved documents
- query translation
- biomedical information retrieval