Abstract
Recent years have witnessed the exponential growth of time series data as the popularity of sensing devices and development of IoT techniques; time series classification has been considered as one of the most challenging studies in time series data mining, attracting great interest over the last two decades. According to the empirical evidences, temporal representation learning-based time series classification has more superiority of accuracy, efficiency and interpretability as compared to hundreds of existing time series classification methods. However, due to the high time complexity of feature process, the performance of these methods has been severely restricted. In this paper, we first presented an efficient shapelet transformation method to improve the overall efficiency of time series classification, and then, we further developed a novel enhanced recurrent neural network model for deep representation learning to further improve the classification accuracy. Experimental results on typical real-world datasets have justified the superiority of our models over several shallow and deep representation learning competitors.
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Acknowledgements
The authors would like to thank the anonymous reviewers and the editors for their insightful comments and suggestions, which are greatly helpful for improving the quality of this paper. This work is supported by the National Natural Science Foundation of China, Nos.: 61772310, 61702300, 61702302, 61802231; the Key Research and Development Program of China, Nos.: 2017YFC0803400, 2018YFC0831000; the project of CERNET Innovation (NGII20190109); and the project of Qingdao Postdoctoral Applied Research.
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Hu, Y., Zhan, P., Xu, Y. et al. Temporal representation learning for time series classification. Neural Comput & Applic 33, 3169–3182 (2021). https://doi.org/10.1007/s00521-020-05179-w
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DOI: https://doi.org/10.1007/s00521-020-05179-w