id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_72uszokn2vf3rnkfho2i2uuf4i	Prakash P. Shenoy	Using possibility theory in expert systems	1992	23	.pdf	application/pdf	9191	988	67	second objective is to describe how Zadeh's theory of possibility fits in the framework of valuation-based systems (VBS). Key Words: Possibility theory, consistent possibilistic state, valuation-based The main goal of this paper is to describe how Zadeh's theory of possibility can be used for managing uncertainty and imprecision in expert systems. define a qualitative description of a possibility function called a consistent possibilistic state. The process of reasoning in VBS can be described simply as finding the marginal of the joint valuation for each variable in the system. The framework of VBS is general enough to represent many domains such as Bayesian probability theory [Shenoy 1991c], Dempster-Shafer's theory of belief functions [Dempster 1967, combination and marginalization operations in possibility theory satisfy the three axioms that enable the use of local computation in computing marginals of the joint possibility function. Section 5 describes a small example illustrating the use of possibility theory for managing uncertainty and imprecision in expert systems.	./cache/work_72uszokn2vf3rnkfho2i2uuf4i.pdf	./txt/work_72uszokn2vf3rnkfho2i2uuf4i.txt