Keyphrases
- query expansion
- ranking scheme
- information retrieval systems
- information retrieval
- structuring elements
- language model
- retrieval effectiveness
- text retrieval
- pseudo relevance feedback
- language modeling
- relevance feedback
- relevant documents
- improving search
- original query
- retrieval model
- query terms
- model for information retrieval
- automatic query expansion
- query disambiguation
- learning algorithm
- query specific
- interactive query expansion
- semi supervised
- relevance model
- indexing scheme
- retrieved documents
- pseudo feedback
- ranked retrieval
- machine learning
- biomedical information retrieval
- trec genomics track
- query processing