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基于状态空间模型的道路交通状态多点时间序列预测

, PP. 113-117

Keywords: 交通工程,交通状态预测,状态空间模型,多点时间序列,卡尔曼滤波

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Abstract:

?以多点的道路交通状态为研究对象,把道路交通状态单点预测向多点同时预测扩展,提出了基于状态空间模型的道路交通状态多点时间序列预测方法。首先,利用道路交通状态的多点时间序列数据建立多维自回归模型,转化状态空间模型形式,接着利用EM算法估计状态空间模型参数,从而得到多点道路交通状态的状态空间模型;其次,根据时间序列数据估计系统状态,利用卡尔曼滤波算法进行一步预测,补充新的数据并更新系统状态递推预测;最后,利用某城市快速路上相邻6个交通检测器采集的多点时间序列数据验证模型的有效性,并与卡尔曼滤波单点预测方法相对比。结果表明:该模型是可行和有效的。

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