Keyphrases
- generative model
- text mining
- sparse coding
- latent dirichlet allocation
- probabilistic model
- topic models
- hierarchical hidden markov models
- information extraction
- mixture model
- text documents
- discriminative models
- knowledge discovery
- prior knowledge
- text classification
- em algorithm
- information retrieval
- natural language processing
- conditional random fields
- maximum entropy principle
- discriminative learning
- semi supervised
- machine learning
- sparse representation
- high dimensional
- data mining
- representational power
- document clustering
- named entities
- expectation maximization
- graphical models
- maximum entropy
- object categories
- learning algorithm
- unsupervised learning
- natural language
- data analysis