Road Network Reliability Evaluation Method Based on Cloud Theory
Xin Miao, Xi Bao · Journal of Highway and Transportation Research and Development · 2008
Taking scientifically evaluation of road network reliability(RNR) as the object,it was argued that this problem related to cognition and expression of RNR.RNR was considered as a unification of fuzzy and random meaning in uncertain environment.Furthermore,intrinsic relationship between the theoretical foundation of the RNR concept and the cloud theory was discovered,and cloud theory was applied to study the evaluation of RNR by a holistic perspective accordingly.According to comprehensive invalidation degree of road network,RNR was divided into six grades and the influencing factors of RNR were classified into five sorts.Comprehensive performance model was developed to measure the five sorts of influencing factors and to evaluate which class that certain RNR belongs to.Considering the cognition and expression of RNR were borne by human thinking and natural language was the carrier of human thinking,therefore,linguistic terms were adopted to express the uncertain transformation between qualitative concepts and their corresponding quantitative numerical values.This method was further explained by application analysis.