Keyphrases
- query expansion
- news articles
- automatic query expansion
- query generation
- original query
- query terms
- improving search
- information retrieval systems
- query expansion methods
- ad hoc retrieval
- news stories
- information retrieval
- retrieval effectiveness
- probabilistic retrieval model
- relevance model
- search logs
- ranked retrieval
- relevance feedback
- short queries
- language model
- text retrieval
- language modeling
- keywords
- query disambiguation
- vocabulary mismatch
- meta search
- query specific
- topic detection and tracking
- pseudo relevance feedback
- initial query
- retrieval model
- web search engines
- query processing
- expansion terms
- relevant documents
- user queries
- query translation
- query logs
- retrieval systems
- interactive query expansion
- biomedical information retrieval
- bayesian networks