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DeepMeshCity: A Deep Learning Model for Urban Grid Prediction

Published: 29 April 2024 Publication History

Abstract

Urban grid prediction can be applied to many classic spatial-temporal prediction tasks such as air quality prediction, crowd density prediction, and traffic flow prediction, which is of great importance to smart city building. In light of its practical values, many methods have been developed for it and have achieved promising results. Despite their successes, two main challenges remain open: (a) how to well capture the global dependencies and (b) how to effectively model the multi-scale spatial-temporal correlations? To address these two challenges, we propose a novel method—DeepMeshCity, with a carefully-designed Self-Attention Citywide Grid Learner (SA-CGL) block comprising of a self-attention unit and a Citywide Grid Learner (CGL) unit. The self-attention block aims to capture the global spatial dependencies, and the CGL unit is responsible for learning the spatial-temporal correlations. In particular, a multi-scale memory unit is proposed to traverse all stacked SA-CGL blocks along a zigzag path to capture the multi-scale spatial-temporal correlations. In addition, we propose to initialize the single-scale memory units and the multi-scale memory units by using the corresponding ones in the previous fragment stack, so as to speed up the model training. We evaluate the performance of our proposed model by comparing with several state-of-the-art methods on four real-world datasets for two urban grid prediction applications. The experimental results verify the superiority of DeepMeshCity over the existing ones. The code is available at https://github.com/ILoveStudying/DeepMeshCity.

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    Published In

    cover image ACM Transactions on Knowledge Discovery from Data
    ACM Transactions on Knowledge Discovery from Data  Volume 18, Issue 6
    July 2024
    760 pages
    EISSN:1556-472X
    DOI:10.1145/3613684
    Issue’s Table of Contents

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    Association for Computing Machinery

    New York, NY, United States

    Publication History

    Published: 29 April 2024
    Online AM: 15 March 2024
    Accepted: 02 March 2024
    Revised: 05 February 2024
    Received: 23 September 2023
    Published in TKDD Volume 18, Issue 6

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    Author Tags

    1. Spatial-temporal prediction
    2. crowd/traffic flow prediction
    3. urban computing

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    • Research-article

    Funding Sources

    • National Natural Science Foundation of China
    • Shenzhen College Stability Support Plan
    • China Scholarship Council
    • National Research Foundation, Singapore under its AI Singapore Programme

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    • (2024)Efficient algorithms to mine concise representations of frequent high utility occupancy patternsApplied Intelligence10.1007/s10489-024-05296-254:5(4012-4042)Online publication date: 18-Mar-2024
    • (2024)STA: Enhancing Spatio-temporal Crowd Flow Prediction Using Attention-based Deep Learning and Feature SimilarityAdvanced Data Mining and Applications10.1007/978-981-96-0821-8_27(403-417)Online publication date: 15-Dec-2024

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