Keyphrases
- term selection
- query expansion
- expansion terms
- information retrieval systems
- pseudo relevance feedback
- ad hoc retrieval
- retrieval effectiveness
- relevance feedback
- language modeling
- language model
- information retrieval
- text retrieval
- relevant documents
- retrieval model
- original query
- query terms
- retrieved documents
- document retrieval
- retrieval systems
- bag of words
- decision trees