Representing Heuristic Knowledge in D-S Theory
نویسندگان
چکیده
The Dempster Shafer theory of evidence has been used intensively to deal with uncer tainty in knowledge based systems How ever the representation of uncertain rela tionships between evidence and hypothesis groups heuristic knowledge is still a major research problem This paper presents an ap proach to representing such heuristic knowl edge by evidential mappingswhich are de ned on the basis of mass functions The re lationships between evidential mappings and multivaluedmappings as well as between ev idential mappings and Bayesian multi val ued causal link models in Bayesian theory are discussed Following this the detailed pro cedures for constructing evidential mappings for any set of heuristic rules are introduced Several situations of belief propagation are discussed
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