Keyphrases
- language model
- domain adaptation
- language modeling
- document retrieval
- n gram
- information retrieval
- probabilistic model
- cross domain
- query expansion
- test collection
- retrieval model
- semi supervised
- labeled data
- transfer learning
- target domain
- text categorization
- unlabeled data
- active learning
- fusion method
- co training
- multiple sources
- training data