Keyphrases
- query expansion
- event driven
- information retrieval systems
- retrieval effectiveness
- language model
- information retrieval
- language modeling
- automatic query expansion
- relevance feedback
- text retrieval
- real time
- retrieved documents
- retrieval model
- ad hoc retrieval
- improving search
- pseudo relevance feedback
- original query
- trec genomics track
- markup language
- relevant documents
- query terms
- web corpora
- initial query
- vocabulary mismatch
- relational databases
- ranking scheme
- metadata
- biomedical information retrieval
- machine learning