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首页> 外文期刊>Journal of advanced transportation >Spatio-Temporal Segmented Traffic Flow Prediction with ANPRS Data Based on Improved XGBoost
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Spatio-Temporal Segmented Traffic Flow Prediction with ANPRS Data Based on Improved XGBoost

机译:基于改进XGBoost的ANPRS数据时空分段交通流预测

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Traffic prediction is highly significant for intelligent traffic systems and traffic management. eXtreme Gradient Boosting (XGBoost), a scalable tree lifting algorithm, is proposed and improved to predict more high-resolution traffic state by utilizing origin-destination (OD) relationship of segment flow data between upstream and downstream on the highway. In order to achieve fine prediction, a generalized extended-segment data acquirement mode is added by incorporating information of Automatic Number Plate Recognition System (ANPRS) from exits and entrances of toll stations and acquired by mathematical OD calculation indirectly without cameras. Abnormal data preprocessing and spatio-temporal relationship matching are conducted to ensure the effectiveness of prediction. Pearson analysis of spatial correlation is performed to find the relevance between adjacent roads, and the relative importance of input modes can be verified by spatial lag input and ordinary input. Two improved models, independent XGBoost (XGBoost-I) with individual adjustment parameters of different sections and static XGBoost (XGBoost-S) with overall adjustment of parameters, are conducted and combined with temporal relevant intervals and spatial staggered sectional lag. The early_stopping_rounds adjustment mechanism (EAM) is introduced to improve the effect of the XGBoost model. The prediction accuracy of XGBoost-I-lag is generally higher than XGBoost-I, XGBoost-S-lag, XGBoost-S, and other baseline methods for short-term and long-term multistep ahead. Additionally, the accuracy of the XGBoost-I-lag is evaluated well in nonrecurrent conditions and missing cases with considerable running time. The experiment results indicate that the proposed framework is convincing, satisfactory, and computationally reasonable.
机译:交通预测对于智能交通系统和流量管理非常重要。提出极端梯度升压(XGBoost),一种可伸缩的树提升算法,并通过利用高速公路上游和下游之间的段流量数据的原始目的地(OD)关系来预测更多高分辨率的业务状态。为了实现精细预测,通过从收费站的退出和入口处结合来自收费站的自动数板识别系统(ANPRS)的信息来添加广义扩展段数据获取模式,并通过没有相机的数学OD计算来获取。进行异常数据预处理和时空关系匹配以确保预测的有效性。进行Pearson对空间相关性的分析,以找到相邻道路之间的相关性,并且可以通过空间滞后输入和普通输入来验证输入模式的相对重要性。通过不同部分和静态XGBoost(XGBoost-S)的两个改进的模型,独立的XGBoost(XGBoost-I)进行了各个调整参数,与参数的整体调整,并与时间相关间隔和空间交错截面滞后进行。介绍了早期调整机制(EAM)以提高XGBoost模型的效果。 XGBoost-I-LAG的预测精度通常高于XGBoost-i,XGBoost-S-LAG,XGBoost-s和其他基线方法,用于短期和长期多步骤。另外,XGBoost-i-LAG的准确性在非逆流条件下评估良好,并且具有相当多的运行时间的丢失案例。实验结果表明,拟议的框架令人信服,令人满意和计算合理。

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