ISSN:
1573-1375
Keywords:
Reasoning under uncertainty
;
causal probabilistic network
;
influence diagram
;
belief network
;
knowledge-based systems
;
evidence
;
fast retraction
;
maxinlization
;
explanation
;
simulation
;
junction tree
;
charge
;
potential function
;
flow
;
propagation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Computer Science
,
Mathematics
Notes:
Abstract A probabilistic expert system provides a graphical representation of a joint probability distribution which can be used to simplify and localize calculations. Jensenet al. (1990) introduced a ‘flow-propagation’ algorithm for calculating marginal and conditional distributions in such a system. This paper analyses that algorithm in detail, and shows how it can be modified to perform other tasks, including maximization of the joint density and simultaneous ‘fast retraction’ of evidence entered on several variables.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01890546
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