Keyphrases
- document collections
- term weighting
- text retrieval
- information retrieval
- query terms
- inverse document frequency
- information retrieval systems
- term weighting schemes
- tf idf
- retrieval systems
- test collection
- term weights
- weighting schemes
- text categorization
- language modeling
- term frequency
- vector space model
- retrieval model
- neural network
- query expansion
- comparative evaluation
- language model
- search engine
- weighting functions