A COMPARATIVE STUDY OF APPROXIMATION METHODS OF TERMINAL RELIABILITY ANALYSIS FOR ROAD NETWORKS

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  • 道路網信頼性の近似解析方法の比較研究
  • ドウロモウ シンライセイ ノ キンジ カイセキ ホウホウ ノ ヒカク ケンキュ

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Abstract

A number of methods for obtaining approximate terminal reliability between given two nodes in a road network have been proposed so far. In this paper, the following four methods are compared. Two of them are based on Reliability Graph Analysis with partial minimal path sets and cut sets developed by authors; One method determines upper and lower bounds with Boolean algebraic absorption and the other evaluates an approximate value without Boolean absorption. The remainder are Monte Carlo methods; One is a traditional Monte Carlo method with direct sampling and the other is an improved Monte Carlo method with restricted sampling by a variance reducing technique. Numerical examples for model networks and a real network are executed and the merits and demerits of those methods are discussed.

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