基于OLS算法的RBF神经网络高速公路事件探测  

Freeway Incident Detection Based on OLS and RBF Neural Networks

作　　者：杨耀华[1] 李昕[1] 江芳泽[1] 

机构地区：[1]上海大学机电工程与自动化学院,上海200072

出　　处：《系统仿真学报》2003年第5期709-712,共4页Journal of System Simulation

基　　金：上海市自然科学基金项目"基于模糊神经网络的高速公路事件预测系统研究"(O12D14019)

摘　　要：高速公路事件是指破坏正常交通流并造成交通阻塞的非重现随机发生的事件。事件发生后对其进行快速可靠的探测对减少交通延误、保障道路安全、减少环境污染具有十分重要的意义。文中提出了一种基于模糊聚类技术和RBF神经网络的混合智能高速公路事件自动探测算法,同时改进了用于RBF神经网络训练的OLS(正交最小二乘)选择算法。仿真实验证明,改进的OLS选择算法大大提高了RBF神经网络的训练速度,同时具有无须事先确定RBF中心的优点,将之运用于公路事件探测可以获得满意的性能。Freeway incidents are non-recurrent and pseudorandom events that disrupt the normal flow of traffic and create a bottleneck in the road network. Quick and reliable incidents detection is essential to reduce traffic delays, ensure road safety and protect environment. This paper presents a new hybrid intelligence algorithm for automatically detecting freeway incidents, which employs fuzzy clustering and RBF neural computing technique. An improved OLS(Orthogonal Least Squares) selection algorithm for training RBF neural networks is also proposed. The simulation results illustrate that the improved OLS selection algorithm accelerates the training of the RBF neural networks substantially and there is no need to decide the number of RBF centers in advance. The satisfactory performance could be achieved by using this algorithm in freeway incidents detection.

关 键 词：高速公路事件探测 模糊聚类 RBF神经网络 正交最小二乘算法 

分 类 号：U412.36[交通运输工程—道路与铁道工程]