用二维时间建模提升公交到站预测精度,跨线路通用性强。
ArrivalNet: Predicting City-wide Bus/Tram Arrival Time with Two-dimensional Temporal Variation Modeling
- 将时间序列拆解为周期内与周期间变化,形成类图像的二维张量
- 在德累斯顿数据上误差比现有方法降低超三成,尤其对百分比误差改善显著
- 适合需要多线路统一预测的智能交通系统开发者使用
精准的公交车/有轨电车到站时间预测对公共交通运营至关重要。现有方法多聚焦一维时间信息,忽视了时间序列中隐藏的周期性特征。同时,多数研究仅针对单一或少数线路开发算法,限制了模型的迁移能力和在管理系统的应用。为此,本文提出基于二维时间变化建模的多步到站预测方法 ArrivalNet。该方法将一维时间序列分解为周期内和周期间变化,重构为二维张量(2D块):每行对应一个周期内的时间点,每列对应各周期中相同相对时间点。不同频率的2D块具有类似图像的特征表示,可借助计算机视觉骨干网络(如卷积神经网络)有效学习。借鉴残差网络思想,设计2D块模块作为基础单元实现灵活聚合。同时引入工作日、高峰时段、交叉路口等上下文因素增强特征表示。基于德累斯顿125天的公共交通数据进行训练与验证。实验结果表明,所提模型的均方根误差、平均绝对误差和平均绝对百分比误差较最先进基线方法至少降低6.1%、14.7%和34.2%。
原文摘要 · Abstract (English)
Accurate arrival time prediction (ATP) of buses and trams plays a crucial role in public transport operations. Current methods focused on modeling one-dimensional temporal information but overlooked the latent periodic information within time series. Moreover, most studies developed algorithms for ATP based on a single or a few routes of public transport, which reduces the transferability of the prediction models and their applicability in public transport management systems. To this end, this paper proposes \textit{ArrivalNet}, a two-dimensional temporal variation-based multi-step ATP for buses and trams. It decomposes the one-dimensional temporal sequence into intra-periodic and inter-periodic variations, which can be recast into two-dimensional tensors (2D blocks). Each row of a tensor contains the time points within a period, and each column involves the time points at the same intra-periodic index across various periods. The transformed 2D blocks in different frequencies have an image-like feature representation that enables effective learning with computer vision backbones (e.g., convolutional neural network). Drawing on the concept of residual neural network, the 2D block module is designed as a basic module for flexible aggregation. Meanwhile, contextual factors like workdays, peak hours, and intersections, are also utilized in the augmented feature representation to improve the performance of prediction. 125 days of public transport data from Dresden were collected for model training and validation. Experimental results show that the root mean square error, mean absolute error, and mean absolute percentage error of the proposed predictor decrease by at least 6.1\%, 14.7\%, and 34.2\% compared with state-of-the-art baseline methods.
Thank you to arXiv for use of its open access interoperability. PaperDance 不是 arXiv 官方产品;中文卡片由大模型生成,请以原文为准。