Jingwen Tian , Liangzhe Han , Mao Chen , Yi Xu , Zhuo Chen , Tongyu Zhu , Leilei Sun , Weifeng Lv
{"title":"MFGCN: Multi-faceted spatial and temporal specific graph convolutional network for traffic-flow forecasting","authors":"Jingwen Tian , Liangzhe Han , Mao Chen , Yi Xu , Zhuo Chen , Tongyu Zhu , Leilei Sun , Weifeng Lv","doi":"10.1016/j.knosys.2024.112671","DOIUrl":null,"url":null,"abstract":"<div><div>Traffic-flow forecasting is a fundamental issue in Intelligent Transportation Systems. Owing to the natural topological structure of road networks, graph convolutional networks (GCNs) have become one of the most promising components. However, existing methods usually implement graph convolution on a static adjacent matrix to capture the spatial relations between road segments, ignoring the fact that the spatial impact varies across time. Moreover, they always learn the common temporal relations for all segments and fail to capture unique patterns for each distinct node. To address these issues, this study explores time-specific spatial dependencies and node-specific temporal relations to utilize GCN for improved traffic-flow forecasting. First, graph convolution is extended to learn the temporal relations between different time slots. The trained graphs contain unique temporal patterns for each node and share patterns among different nodes. Second, a time-specific spatial graph-learning module is designed to establish dynamic spatial dependencies between traffic nodes, which can vary at different times. Finally, an adaptive pattern-sharing mechanism is proposed to adaptively learn the layer-specific patterns and sharing-across-layer patterns. The proposed model is evaluated on four public real-world traffic datasets, and the results show that it outperforms all state-of-the-art methods on the four real-world datasets.</div></div>","PeriodicalId":49939,"journal":{"name":"Knowledge-Based Systems","volume":"306 ","pages":"Article 112671"},"PeriodicalIF":7.2000,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Knowledge-Based Systems","FirstCategoryId":"94","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950705124013054","RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE","Score":null,"Total":0}
引用次数: 0
Abstract
Traffic-flow forecasting is a fundamental issue in Intelligent Transportation Systems. Owing to the natural topological structure of road networks, graph convolutional networks (GCNs) have become one of the most promising components. However, existing methods usually implement graph convolution on a static adjacent matrix to capture the spatial relations between road segments, ignoring the fact that the spatial impact varies across time. Moreover, they always learn the common temporal relations for all segments and fail to capture unique patterns for each distinct node. To address these issues, this study explores time-specific spatial dependencies and node-specific temporal relations to utilize GCN for improved traffic-flow forecasting. First, graph convolution is extended to learn the temporal relations between different time slots. The trained graphs contain unique temporal patterns for each node and share patterns among different nodes. Second, a time-specific spatial graph-learning module is designed to establish dynamic spatial dependencies between traffic nodes, which can vary at different times. Finally, an adaptive pattern-sharing mechanism is proposed to adaptively learn the layer-specific patterns and sharing-across-layer patterns. The proposed model is evaluated on four public real-world traffic datasets, and the results show that it outperforms all state-of-the-art methods on the four real-world datasets.
期刊介绍:
Knowledge-Based Systems, an international and interdisciplinary journal in artificial intelligence, publishes original, innovative, and creative research results in the field. It focuses on knowledge-based and other artificial intelligence techniques-based systems. The journal aims to support human prediction and decision-making through data science and computation techniques, provide a balanced coverage of theory and practical study, and encourage the development and implementation of knowledge-based intelligence models, methods, systems, and software tools. Applications in business, government, education, engineering, and healthcare are emphasized.