Keyphrases
- text summarization
- named entity recognition
- information extraction
- maximum entropy
- named entities
- natural language processing
- annotated corpus
- chinese texts
- lattice structure
- conditional random fields
- chinese named entity recognition
- question answering
- query expansion
- keyword extraction
- artificial neural networks
- co occurrence
- semi supervised
- concept lattice
- knowledge discovery
- learning algorithm
- genetic algorithm
- information retrieval