共查询到16条相似文献,搜索用时 93 毫秒
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运用具有内、外环道的平面环形交叉路口元胞自动机模型,利用交通流基本图从瓶颈的角度研究了车道尺度对平面环行交叉路口交通流的影响。计算机模拟结果表明:同步增加内、外环道长度时,内环道流量将会增加;同步增加入、出环车道长度时,内环道流量保持不变。 相似文献
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在一种改进的Nagel-Schrekenberg元胞自动机交通流模型的基础上,提出一个高速公路双车 道元胞自动机模型来模拟开放性边界条件下的车流运动,并考虑两车道之间左边界开放程度 的比例系数α及车辆加减速概率p的影响.计算机数值模拟结果表明,在车流状态的演化过程 中,通过确定车道耦合系数b来控制车流量,不同的b值车流量不同,对车辆运动出现堵塞项 的相变点有影响.
关键词:
元胞自动机
交通流模型
耦合效应 相似文献
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This paper presents a cellular automaton traffic flow
model with an open boundary condition to describe the traffic flow at
a roundabout crossing with an inner roundabout lane and an outer
roundabout lane. The simulation results show that the boundary
condition, bottlenecks and the self-organization affect the traffic
flow at the roundabout crossing. Because of the effect of
bottlenecks, jams easily appear on the inner roundabout lane. To
improve the capacity of the roundabout system, proper values of the
enter probability α and the out probability $\beta $ can be
chosen. 相似文献
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The cellular automaton model is suggested to describe the traffic-flow at the grade
roundabout crossing. After the simulation with computer, the fundamental properties
of this model have been revealed. Analysing this kind of road structure, this paper
transforms the grade roundabout crossing with inner-roundabout-lane and
outer-roundabout-lane into a configuration with many bottlenecks. Because of the
self-organization, the traffic flow remains unblocked under a certain vehicle
density. Some results of the simulation are close to the actual design parameter. 相似文献
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According to the railway transportation system's characteristics, a new
cellular automaton model for the single-line railway system is presented in
this paper. Based on this model, several simulations were done to imitate
the train operation under three working diagrams. From a different angle the
results show how the organization of train operation impacts on the railway
carrying capacity. By using the non-parallel train working diagram the
influence of fast-train on slow-train is found to be the strongest. Many
slow-trains have to wait in-between neighbouring stations to let the
fast-train(s) pass through first. So the slow-train will advance like a wave
propagating from the departure station to the arrival station. This also
resembles the situation of a highway jammed traffic flow. Furthermore, the
nonuniformity of travel times between the sections also greatly limits the
railway carrying capacity. After converting the nonuniform sections into the
sections with uniform travel times while the total travel time is kept
unchanged, all three carrying capacities are improved greatly as shown by
simulation. It also shows that the cellular automaton model is an effective
and feasible way to investigate the railway transportation system. 相似文献
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利用等效变换和自旋重标相结合的方法, 研究了镶嵌正方晶格上的Gauss模型. 研究 发现, 该系统可以变换为正方晶格上具有最近邻和次近邻相互作用的Gauss系统, 由此严格求得了镶嵌正方晶格上Gauss模型的临界温度, 得到了该系统的精确相图. 相似文献