Machine Learning, Probabilistic Modelling, Rbm, Deep Belief Network.
nowadays. It is a relaxed version of Boltzmann Machine. 1986: was introduced as Harmonium. Paul Smolensky. Information processing in dynamical systems: Foundations of harmony theory. Technical report, DTIC Document, 1986 2001: fast approximated inference algorithm 1 as Contrastive Divergence (CD).