Keyphrases
- query expansion
- latent semantic
- information retrieval systems
- retrieval effectiveness
- information retrieval
- pseudo relevance feedback
- text retrieval
- relevance feedback
- retrieval model
- language modeling
- ad hoc retrieval
- language model
- improving search
- relevant documents
- original query
- semantic similarity
- ranked retrieval
- natural language
- semantic information
- query expansion methods
- query terms
- query disambiguation
- learning algorithm
- biomedical information retrieval
- automatic query expansion
- trec genomics track
- machine learning
- relevance model
- retrieved documents
- test collection
- wordnet
- information extraction