计算机科学 ›› 2025, Vol. 52 ›› Issue (10): 90-97.doi: 10.11896/jsjkx.241000045
雷二帅, 禹素萍, 范红, 许武军
LEI Ershuai, YU Suping, FAN Hong, XU Wujun
摘要: 在交通预测领域,数据间存在着复杂且长程的时空关系,现有的图结构未能充分挖掘数据间隐含的时空关系。针对上述问题,在MTGNN的基础上进行了一系列的改进,提出了一种用于交通预测的时空传播图神经网络(Spatial-Temporal Propagation Graph Neural Network,STPGNN)。首先,用多尺度卷积模块来捕获不同尺度的时序信息,并通过特征融合模块进行融合,以捕获复杂的时序信息。其次,在MTGNN单向自适应图结构的基础上,设计并加入了双向图学习层,以深入挖掘并利用数据间隐含的双向空间关系。接着,针对网络层级间的信息传递,提出一种新的层级间信息传递方法,将每层中多尺度的时序信息依次传递至下一层,以更好地挖掘复杂且长程的时空关系。最后,根据网络各层级的时间与空间信息,通过输出卷积获得预测结果。在METR-LA,PEMS-BAY和NE-BJ等数据集上进行了实验验证,结果表明,STPGNN能够有效提高预测精度,在常用的3个指标上优于一些现有的方法,尤其是在进行更长时的预测时,表现更为出色。
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