摘要: This paper deals with the knowledge representation and reasoning in directed belief networks. These networks are similar to those defined by Pearl (causal networks), but instead of probability functions, we use functions. Based on work Cano et al. [1992] which they have presented an axiomatic framework for propagating valuations acyclic graph using Shafer-Shenoy's axioms valuation-based system (VBS), show how Dempster-Shafer theory fits this framework. Then, present a propagation algorithm that is extended from Pearl's algorithm, it expressed terms
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