Keyphrases
- pseudo relevance feedback
- query expansion
- retrieval accuracy
- document retrieval
- relevance feedback
- retrieval effectiveness
- query length
- ad hoc retrieval
- relevance model
- average precision
- language model
- trec test collections
- pseudo feedback
- retrieval model
- original query
- query specific
- automatic query expansion
- trec collections
- test collection
- query terms
- relevant documents
- document ranking
- information retrieval
- ad hoc information retrieval
- information retrieval systems
- language modelling
- document collections
- text retrieval
- interactive query expansion
- language modeling
- retrieved documents
- graded relevance assessments
- document level
- term selection
- term frequency
- retrieval systems
- image retrieval
- learning to rank
- text categorization
- information extraction
- digital libraries
- bayesian networks