A Passage Retrieval System using Query Expansion and Emphasis.
Hiroki TaniokaKenichi YamamotoPublished in: NTCIR (2007)
Keyphrases
- query expansion
- information retrieval systems
- relevance feedback
- passage retrieval
- information retrieval
- document retrieval
- language model
- retrieval effectiveness
- language modeling
- retrieval systems
- question answering
- query terms
- pseudo relevance feedback
- relevant documents
- text retrieval
- document collections
- automatic query expansion
- ad hoc retrieval
- document level
- retrieval model
- web corpora
- trec genomics track
- active learning
- biomedical information retrieval
- original query
- user queries
- ranked retrieval
- improving search
- machine learning
- learning algorithm
- model for information retrieval
- retrieval method
- relevance model
- search engine
- learning process
- vocabulary mismatch
- query expansion methods
- retrieved documents
- query disambiguation
- ranked list