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• W4381186388 abstract "Trajectory representation learning aims to embed trajectory sequences into fixed-length vector representations while preserving their original spatio-temporal feature proximity. Existing works either learn trajectory representations for specific mining tasks or fail to utilize large amounts of unlabeled trajectory data for representation learning. In this work, we propose a self-supervised Trajectory representation learning based on Reconstruction Contrastive Learning called TrajRCL. To be specific, TrajRCL first obtains low-distortion and high-fidelity views of trajectories through trajectory augmentation. Then, TrajRCL leverages a Transformer based encoder–decoder network to reconstruct low-distortion view trajectories to approximate high-fidelity trajectories. Self-supervised contrastive learning is finally used to enhance the consistency of the two view’s trajectory representations. Extensive experiments on two real-world demonstrate the superiority of our model over state-of-the-art baselines and significant efficiency on similarity trajectory search and k-NN query." @default.
• W4381186388 created "2023-06-20" @default.
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• W4381186388 date "2023-11-01" @default.
• W4381186388 modified "2023-10-12" @default.
• W4381186388 title "Self-supervised contrastive representation learning for large-scale trajectories" @default.
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• W4381186388 doi "https://doi.org/10.1016/j.future.2023.05.033" @default.
• W4381186388 hasPublicationYear "2023" @default.
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