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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
On Weakness of Evidential Networks
 Vejnarová, Jiřina
In evidence theory several counterparts of Bayesian networks based on different paradigms have been proposed. We will present, through simple examples, problems appearing in two kinds of these models caused either by the conditional independence concept (or its misinterpretation) or by the use of a conditioning rule. The latter kind of problems can be avoided if undirected models are used instead.
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On Three Conditioning Rules in Evidence Theory
 Vejnarová, Jiřina
In evidence theory various rules were proposed to define conditional beliefs and/or plausibilities (or basic assignments). However, there exist no generally accepted criteria along which these rules can be compared. In this paper we concentrate to three of them (Dempster's conditioning rule, focusing and the approach based on lower and upper envelopes of sets of conditional probabilities) to study their mutual relationship. A new conditional rule for variables is presented afterwards and its correctness is proven.
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O Markovových procesech v teorii evidenci
 Vejnarová, Jiřina
The goal of the paper is to recall a recently introduced concept of conditional independence in evidence theory and to discuss Markov properties based on this independence concept.
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