| | Stochastic Simulation of Casual Bayesian Models |
Bibtype
article
Has publishing details
,,331,1988
Has title
Stochastic Simulation of Casual Bayesian Models
Has where published
International Journal of Approximate Reasoning, Volume 2
Has year
1988
Title
Stochastic Simulation of Casual Bayesian Models
Year
1988
Abstract
This paper examines Bayesian belief networ … This paper examines Bayesian belief network inference using simulation as a method for computing the posterior probabilities of network variables. Specifically, it examines the use of a method described by Henrion, called logic sampling, and a method described by Pearl, called stochastic simulation. We first review the conditions under which logic sampling is computationally infeasible. Such cases motivated the development of the Pearl's stochastic simulation algorithm. We have found that this stochastic simulation algorithm, when applied to certain networks, leads to much slower than expected convergence to the true posterior probabilities. This behavior is a result of the tendency for local areas in the network to become fixed through many simulation cycles. The time required to obtain significant convergence can be made arbitrarily long be strengthening the probabilistic dependency between nodes. We propose the use of several forms of graph modification, such as graph pruning, arc reversal, and node reduction, in order to convert some networks into formats that are computationally more efficient for simulation. utationally more efficient for simulation.
Note
Chapter: Bayesian Belief Network Inference Using Simulation.
Author
Homer L. Chin and Gregory F. Cooper +
Has author
Homer L. Chin and Gregory F. Cooper +
Has identifier
Title=Stochastic Simulation of Casual Bayesian Models +
Journal
International Journal of Approximate Reasoning, Volume 2 +
Ksl tr id
Title=Stochastic Simulation of Casual Bayesian Models +
Pages
331 +
Process note
GOOGLE +
Publisher
North-Holland +
Categories Article +, KSL Technical Report +, Publication +
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