Keyphrases
- query expansion
- information retrieval
- information retrieval systems
- retrieval effectiveness
- language modeling
- language model
- pseudo relevance feedback
- relevant documents
- retrieval model
- ad hoc retrieval
- text retrieval
- relevance feedback
- automatic query expansion
- term selection
- model for information retrieval
- query terms
- improving search
- vocabulary mismatch
- search engine
- document retrieval
- biomedical information retrieval
- query translation
- document collections
- retrieved documents
- original query
- document ranking
- information extraction
- ranked retrieval
- trec genomics track
- patent retrieval
- query expansion methods
- probabilistic retrieval model
- spoken document retrieval
- tf idf
- information access
- probabilistic model
- keywords