One aspect of the invention is the construction of mixtures of Bayesian networks. Another aspect of the invention is the use of such mixtures of Bayesian networks to perform inferencing. A mixture of Bayesian networks (MBN) consists of plural hypothesis-specific Bayesian networks (HSBNs) having possibly...http://www.google.com.au/patents/US6496816?utm_source=gb-gplus-sharePatent US6496816 - Collaborative filtering with mixtures of bayesian networks