期刊
DATA & KNOWLEDGE ENGINEERING
卷 135, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.datak.2021.101912
关键词
COVID-19; Traffic revitalization index; Data mining; Data models; Mining methods and algorithms
资金
- National Key Research and Development Plan Key Special Projects [2018YFB2100303]
- Shandong Province colleges and universities youth innovation technology plan innovation team project [2020KJN011]
- Program for Innovative Postdoctoral Talents in Shandong Province [40618030001]
- National Natural Science Foundation of China [61802216]
- Postdoctoral Science Foundation of China [2018M642613]
The paper proposes a deep model DeepTRI for predicting urban Traffic Revitalization Index, taking advantage of spatial correlation features and combining different proportions of data to increase spatial correlation. Compared to traditional models, DeepTRI shows advantages in long-term prediction ability and solving under-fitting problems.
The research of traffic revitalization index can provide support for the formulation and adjustment of policies related to urban management, epidemic prevention and resumption of work and production. This paper proposes a deep model for the prediction of urban Traffic Revitalization Index (DeepTRI). The DeepTRI builds model for the data of COVID-19 epidemic and traffic revitalization index for major cities in China. The location information of 29 cities forms the topological structure of graph. The Spatial Convolution Layer proposed in this paper captures the spatial correlation features of the graph structure. The special Graph Data Fusion module distributes and fuses the two kinds of data according to different proportions to increase the trend of spatial correlation of the data. In order to reduce the complexity of the computational process, the Temporal Convolution Layer replaces the gated recursive mechanism of the traditional recurrent neural network with a multi-level residual structure. It uses the dilated convolution whose dilation factor changes according to convex function to control the dynamic change of the receptive field and uses causal convolution to fully mine the historical information of the data to optimize the ability of long-term prediction. The comparative experiments among DeepTRI and three baselines (traditional recurrent neural network, ordinary spatial-temporal model and graph spatial-temporal model) show the advantages of DeepTRI in the evaluation index and resolving two under-fitting problems (under-fitting of edge values and under-fitting of local peaks).
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