基于流量熵的道路交通网络脆弱性优化

道路交通系统是社会物流实现的重要支撑,其中重要站点的故障可能造成交通系统的运营限于瘫痪,甚至产生重大的经济影响.针对道路交通网络中的相继故障问题,从动静结合的角度分析了道路交通网络的脆弱性.为了检测道路交通网络在相继故障下的脆弱性动态变化,首先建立了道路交通网络的级联反应动力学模型;然后提出该模型中脆弱性的优化设计方案,并利用算法进化得到网络的最优设计;最后利用复杂网络理论得到道路交通网络的网络结构图,通过该算例验证了提出的模型和优化方法的有效性和实际应用性.仿真实验表明该模型和方法能有效地降低交通网络的脆弱性.

On Vulnerable Optimization of Traffic Road Network Based on Flow Entropy

Road traffic system is an important support for social logistics .The failure of a significant site may result in the paralysis of the w hole traffic system ,and even cause a significant economic damage .In this paper ,the dynamical vulnerability of the road traffic network has been explored according to the suc-cessive failures within the system .First ,a cascade reaction model of the road traffic network has been es-tablished for detecting dynamical changes of the network vulnerability facing successive failures .Then an optimal design of the model has been proposed based on evolutionary algorithm .Finally ,the complex net-work theory is applied to obtain the network structure of a road network .And this case study is given to verify the effectiveness and practical application of the proposed model and optimization algorithm .Simula-tion results show that the proposed method can effectively reduce the vulnerability of the road traffic net-work .