17
The generative model after learning 3 layers
• To generate data:
1. Get an equilibrium sample
from the top-level RBM by
performing alternating
Gibbs sampling.
2. Perform a top-down pass
to get states for all the
other layers.
   So the lower level bottom-up
connections  are not part of
the generative model
        h3
         h2
          h1
      data