Pachinko allocation: DAG-structured mixture models of topic correlations.
Wei LiAndrew McCallumPublished in: ICML (2006)
Keyphrases
- mixture model
- gaussian mixture model
- em algorithm
- generative model
- probabilistic model
- density estimation
- model selection
- mixture modeling
- automatic model selection
- language model
- finite mixtures
- directed acyclic graph
- expectation maximization
- unsupervised learning
- maximum likelihood
- probability density function
- gaussian mixture
- topic models
- latent dirichlet allocation
- machine learning
- image processing
- matrix factorization
- dirichlet prior
- similarity measure