Keyphrases
- query expansion
- information retrieval
- information retrieval systems
- retrieval effectiveness
- language model
- pseudo relevance feedback
- language modeling
- text retrieval
- ad hoc retrieval
- relevance feedback
- relevant documents
- retrieval model
- original query
- trec genomics track
- data sets
- feature vectors
- decision trees
- improving search
- model for information retrieval
- vocabulary mismatch
- biomedical information retrieval
- retrieved documents
- query terms
- query translation
- web search
- feature extraction
- machine learning
- document retrieval
- text classification
- text segmentation
- automatic query expansion
- image classification
- ranked retrieval
- probabilistic model