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用解析分析与数值仿真的手段研究了一种典型的车辆跟驰模型(OV模型)与元胞自动机模型(NS模型)之间的区别与联系.首先通过对模型规则的分析,证明了确定NS模型是OV模型的一种离散形式.随后针对两模型更复杂的具体形式,通过数值仿真的手段进行了模型的密度-流量关系与模型在开放边界下的动态特性的研究.实验结果表明,从现象来看,OV模型与NS模型具有非常近似的性质,但两种模型的机制不相同,并且各自具有不能相互替代的优势.为交通流模型的使用和改进提供了参考.
By means of analytic analysis and numerical simulation, this paper studies the difference and connection between a typical vehicle following model (OV model) and cellular automaton model (NS model) .Firstly, through the analysis of the model rules, NS model is a discrete form of OV model.According to the more complicated concrete forms of the two models, the density-flow relationship of the model and the dynamic behavior of the model under the open boundary are studied by means of numerical simulation.The experimental results show that, From the point of view, the OV model and the NS model have very similar properties, but the mechanisms of the two models are not the same, and each has the advantage of not being able to replace each other, which provides a reference for the use and improvement of the traffic flow model.