Keyphrases
- term weighting
- retrieval systems
- information retrieval
- query terms
- document length
- query expansion
- language modeling
- term weights
- text categorization
- inverse document frequency
- text retrieval
- tf idf
- information retrieval systems
- term frequency
- relevance feedback
- language model
- query processing
- retrieval effectiveness
- user queries
- vector space model
- retrieval model
- average precision
- search engine
- term weighting schemes
- search queries
- ir models
- multimedia
- test collection
- learning to rank
- vector space
- document retrieval
- document frequency
- co occurrence
- data mining
- ranked list
- feature selection
- relevant documents
- document collections
- probabilistic model