SeqST-ResNet: A Sequential Spatial Temporal ResNet for Task Prediction in Spatial Crowdsourcing
KAUST DepartmentComputer Science Program
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Online Publication Date2019-04-24
Print Publication Date2019
Permanent link to this recordhttp://hdl.handle.net/10754/652903
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AbstractTask appearance prediction has great potential to improve task assignment in spatial crowdsourcing platforms. The main challenge of this prediction problem is to model the spatial dependency among neighboring regions and the temporal dependency at different time scales (e.g., hourly, daily, and weekly). A recent model ST-ResNet predicts traffic flow by capturing the spatial and temporal dependencies in historical data. However, the data fragments are concatenated as one tensor fed to the deep neural networks, rather than learning the temporal dependencies in a sequential manner. We propose a novel deep learning model, called SeqST-ResNet, which well captures the temporal dependencies of historical task appearance in sequences at several time scales. We validate the effectiveness of our model via experiments on a real-world dataset. The experimental results show that our SeqST-ResNet model significantly outperforms ST-ResNet when predicting tasks at hourly intervals and also during weekday and weekends, more importantly, in regions with intensive task requests.
CitationZhai D, Liu A, Chen S, Li Z, Zhang X (2019) SeqST-ResNet: A Sequential Spatial Temporal ResNet for Task Prediction in Spatial Crowdsourcing. Lecture Notes in Computer Science: 260–275. Available: http://dx.doi.org/10.1007/978-3-030-18576-3_16.
SponsorsThis research was supported in part by National Natural Science Foundation of China (NSFC) (Grant No. 61572336, 61632016, 61572335, 61772356), and Natural Science Research Project of Jiangsu Higher Education Institution (No. 18KJA520010, 17KJA520003), and the King Abdullah University of Science and Technology (KAUST), and the Blockshine Technology corp. Data sour Didi Chuxing.
Conference/Event name24th International Conference on Database Systems for Advanced Applications, DASFAA 2019