摘要
在构建OD矩阵模型时,充分考虑路网中一定连续期内各路段流量的二阶统计量和出行者路径选择的随机性,提出了一种基于路段流量二阶统计量的OD矩阵估计模型,解决了观测路段的相关性和OD矩阵估计求解的不确定性问题。建立的模型所表述的路段出行量和实际路网中的出行量更加吻合。结合实例,说明了模型的可行性和有效性。
OD matrix estimation model based on the second order statistics of road flow was given based on the traditional OD matrix estimation model. In order to solve the relativity of observational road and the uncertainty of OD matrix estimation, the second order statistics for various road flows in a certain consecutive period of time and the randomness of trip link choice should be fully considered. The model was in more accordance with human trips in the actual network. Finally, the model was proved to be feasible and effective through examples.
出处
《交通与计算机》
2008年第1期121-123,共3页
Computer and Communications
关键词
OD矩阵估计
二阶统计量
协方差矩阵
泊松分布
OD matrix estimation
second order statistics
covariance matrix
Poisson distribution
