Density models
Causal models
Energy-Based Models
Intractable
posterior
Densely connected
Directed Acyclic
Graphs
Markov Chain
Monte Carlo
      or
Minimize variational
free energy
Intractable
partition function
e.g. Boltzmann
Machines
Markov Chain
Monte Carlo
        or
Minimize
contrastive
divergence
Tractable
posterior
clustering
factor analysis
sparse bayes nets
Compute exact
posterior