基于交通流灰色关联熵的交通流无序转化研究

用Matlab软件编制皮埃莱（Bierley）模型来产生仿真交通流．在一定参数组合情况下，仿真研究了交通流车队中前后车辆的车头间距变化过程．通过分析这种车头间距的变化曲线，可以明显地观察到交通流无序运动和有序运动之间的转化过程；提出了交通流灰色关联熵模型，并通过该模型对交通流无序转化过程作了分析．结果表明：交通流无序转化过程中存在交通流混沌现象，但其转化过程并不等同于交通流混沌运动的转化过程；交通流从无序运动转化为有序运动的必要条件是从外界获得负熵——信息熵．

Study on the Transition of Disorder Motion in Traffic Flow Based on Gray Relational Entropy of Traffic Flow

The simulation traffic flow is generated based on Bierley car-following model,which is programmed using MATLAB.The changing processes of headway of the front vehicle and the following vehicle in the traffic flow were simulated under the parameters combinations.By analyzing the simulation results of changing processes of headway,it is clear from the orbit in phase space that the transition process between disorder motion and order motion clearly.A gray relational entropy model of traffic flow is put forward....