Keyphrases
- language modeling framework
- language model
- query expansion
- retrieval effectiveness
- language modeling
- n gram
- retrieval model
- document retrieval
- information retrieval
- web search
- topic models
- topic modeling
- relevance model
- smoothing methods
- cross lingual
- xml retrieval
- information retrieval systems
- test collection
- vector space
- relevance feedback
- probabilistic model
- query terms
- relevant documents
- sentence retrieval
- tf idf
- data mining
- co occurrence
- document collections