Keyphrases
- test collection
- information retrieval
- ir evaluation
- relevance assessments
- retrieval effectiveness
- retrieval model
- ad hoc retrieval
- statistical significance
- relevance judgements
- patent retrieval
- language model
- document collections
- information retrieval evaluation
- relevant documents
- trec collections
- average precision
- retrieval systems
- xml retrieval
- information retrieval systems
- evaluation methodology
- search engine
- relevance judgments
- text retrieval
- query expansion
- trec test collections
- vector space model
- evaluation of information retrieval systems
- statistically significant
- newspaper articles
- graded relevance
- clef evaluation campaign
- term weighting
- document set
- term frequency
- language modeling
- statistical tests
- document retrieval