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Cautious merging of belief functions


Congress title :The Ninth European Conference on Symbolic and Quantitative Approaches to Reasoning with uncertainty (ECSQARU-07)
Congress town :Hammamet
Congress date :31/10/2007

Document type > *Congrès/colloque

Keywords > belief fonctions, dependence, least commitment

Research Unit > IRSN/DPAM/SEMIC/LIMSI

Authors > CHOJNACKI Eric, DESTERCKE Sébastien, DUBOIS Didier

Publication Date > 02/11/2007

Summary

When merging belief functions, Dempster rule of combination is justified only when information sources can be considered as independent. When this is not the case, one must find out a cautious merging rule that adds a minimal amount of information to the inputs. Such a rule is said to follow the principle of minimal commitment. Some conditions it should comply with are studied. A cautious merging rule based on maximizing expected cardinality of the resulting belief function is proposed. It recovers the minimum operation when specialized to possibility distributions. This form of the minimal commitment principle is discussed, in particular its discriminating power and its justification when some conflict is present between the belief functions.
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