摘要
以道路网络的路段流量为基础进行OD分布矩阵估计.与以往文献不同的是本文应用了多层前馈神经网络的方法.由于路段流量与相关的OD矩阵分布之间存在连续性关系,这为神经网络模型的逼近特性提供了可行性.本文的方法适用于OD分布矩阵的实时校正.在已知OD分布矩阵的前提下,对两种情境———试验网络和实际Naples农村道路网进行仿真分析.主成分分析法的应用减少了变量个数并有利于改进输入数据.估计误差相对较低,与分析方法相反的是处理的时间几乎是实时的,因此这种方法可用于动态交通管理.本文的神经网络方法在误差和计算时间方面优于传统商业软件得到的OD估计结果.
This paper attempts to deal with traffic Origin Destination （OD） matrix estimation starting from the measurements of flow on road network links. It proposes a different approach from published articles to date, by applying muhilayer feed-forward neural networks. Since the relationship between link flow and the related OD matrix is continuous, it is possible to use the well known approximation property of Neural Network models. The method is proposed for a real-time correction of the OD matrix. Two application scenarios were developed： a trial network and an actual rural network were both simulated by a micro-simulator that assigns known OD matrices. A Principal Component Analysis （PCA） technique was used to reduce the amount of variables and to achieve improved significance for input data. The estimated error was relatively low and, as opposed to analytical approaches, the processing time was almost in real time, making this approach suitable for applications in dynamic traffic management. Comparisons with results obtained by an OD estimation commercial program show better performance in the NN approach both as regards error and computing time.
出处
《交通运输系统工程与信息》
EI
CSCD
北大核心
2013年第4期84-93,133,共11页
Journal of Transportation Systems Engineering and Information Technology
关键词
城市交通
OD分布矩阵估计
神经网络
主成分分析法
路段流量
方差稳定性
urban traffic
OD matrix estimation
neural networks
PCA （ Principal Component Analysis ）
link flow
variance stabilization
