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arXiv physics/0606086physics.soc-phphysics.data-an
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城市交通动力学:无标度网络视角

Urban Traffic Dynamics: A Scale-Free Network Perspective

Mao-Bin Hu, Wen-Xu Wang, Rui Jiang, Qing-Song Wu, Bing-Hong Wang, Yong-Hong Wu

摘要:

这封信提出了一个新的模型来描述无标度网络中的流量动态。通过重新绘制城市道路图,将道路映射到顶点,交叉口映射到边,并引入道路通行能力L和交叉口通过能力C,该模型可应用于城市交通系统。仿真给出了交通系统的总容量,该容量通过从自由流到拥塞的相变来量化。此外,我们报告的基本图流量对密度,其中发现滞后,表明系统是在一定范围内的车辆密度。此外,该基本图与单车道交通模型和二维BML模型的四种状态(自由流、饱和流、阻塞和堵塞)有显著不同。

英文摘要:

This letter propose a new model for characterizing traffic dynamics in scale-free networks. With a replotted road map of cities with roads mapped to vertices and intersections to edges, and introducing the road capacity L and its handling ability at intersections C, the model can be applied to urban traffic system. Simulations give the overall capacity of the traffic system which is quantified by a phase transition from free flow to congestion. Moreover, we report the fundamental diagram of flow against density, in which hysteresis is found, indicating that the system is bistable in a certain range of vehicle density. In addition, the fundamental diagram is significantly different from single-lane traffic model and 2-D BML model with four states: free flow, saturated flow, bistable and jammed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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