【摘要】 把最小二乘法理论运用到了城市交通流领域,在车载GPS数据基础上进行城市路网交通流拥堵状态估计。在具体实现过程中,分析解决了最小二乘法存在的问题,提出了拟和模型的退化处理、增加路网中路段连接处的边界条件等新思路。实践证明了这种处理方法的实用性,在工程中具有十分重要的意义。更多还原

【Abstract】 This paper novelly introduces the least-square method for dynamically estimating traffic state in urban road system.Using GPS data of taxis,it establishsd a model to compute the states of traffic flow in a city road network.The boundary conditions,the degenerated cases of the model,illness condition of least-square algorithm are well considered in the research.The experiments show that the model is correct and can be used in many applications of intelligent transportation system.更多还原