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TimeCSL: Unsupervised Contrastive Learning of General Shapelets for Explorable Time Series Analysis
April 9, 2024, 4:42 a.m. | Zhiyu Liang, Chen Liang, Zheng Liang, Hongzhi Wang, Bo Zheng
cs.LG updates on arXiv.org arxiv.org
Abstract: Unsupervised (a.k.a. Self-supervised) representation learning (URL) has emerged as a new paradigm for time series analysis, because it has the ability to learn generalizable time series representation beneficial for many downstream tasks without using labels that are usually difficult to obtain. Considering that existing approaches have limitations in the design of the representation encoder and the learning objective, we have proposed Contrastive Shapelet Learning (CSL), the first URL method that learns the general-purpose shapelet-based representation …
abstract analysis arxiv cs.db cs.lg general labels learn new paradigm paradigm representation representation learning series tasks time series type unsupervised url
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