提出多视图融合网络,提升交通需求预测的时空特征捕捉能力。
Multi-View Fusion Neural Network for Traffic Demand Prediction
- 设计图-余弦模块融合局部与全局空间特征
- 分离式时序卷积捕捉节点间异质时间变化
- 在两个数据集上实现最优预测精度,适合交通规划研究
时空特征提取是交通研究中的关键问题。现有方法通常采用统一的时间建模机制和固定的拓扑图结构,但固定空间图限制了非直接连接相似节点的空间特征提取,统一时间建模机制则忽略了不同节点时间变化的异质性。为此,本文提出多视图融合神经网络(MVFN)。该方法利用图卷积网络(GCN)提取空间局部特征,通过余弦重加权线性注意力机制(CLA)提取空间全局特征,并将二者结合形成图-余弦模块(GCM)以综合捕获空间特征。同时,采用多通道可分离时序卷积网络(MSTCN),在每层使用多通道时序卷积网络(MTCN)提取统一时序特征,以及可分离时序卷积网络(STCN)提取独立时序特征。最终,将融合的时空特征输入预测层得到结果。模型在两个交通需求数据集上验证,均取得最佳预测精度。
原文摘要 · Abstract (English)
The extraction of spatial-temporal features is a crucial research in transportation studies, and current studies typically use a unified temporal modeling mechanism and fixed spatial graph for this purpose. However, the fixed spatial graph restricts the extraction of spatial features for similar but not directly connected nodes, while the unified temporal modeling mechanism overlooks the heterogeneity of temporal variation of different nodes. To address these challenges, a multi-view fusion neural network (MVFN) approach is proposed. In this approach, spatial local features are extracted through the use of a graph convolutional network (GCN), and spatial global features are extracted using a cosine re-weighting linear attention mechanism (CLA). The GCN and CLA are combined to create a graph-cosine module (GCM) for the extraction of overall spatial features. Additionally, the multi-channel separable temporal convolutional network (MSTCN) makes use of a multi-channel temporal convolutional network (MTCN) at each layer to extract unified temporal features, and a separable temporal convolutional network (STCN) to extract independent temporal features. Finally, the spatial-temporal feature data is input into the prediction layer to obtain the final result. The model has been validated on two traffic demand datasets and achieved the best prediction accuracy.
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。