Abstract
Sequential recommendation (SR) methods improve accuracy by considering the temporal sequence of user-item interactions rather than treating interaction histories as static sets. In this paper, we address the problem of implicit representation learning for multi-time-scale user interests by proposing a novel method based on user behavior sequence modeling—multi-time-scale with clockwork recurrent neural network modeling for sequential recommendation (MTSC). Specifically, firstly, we group the neurons of the hidden layer of the recurrent neural network (RNN) based on the clockwork RNN (CW-RNN) method according to the different degrees of dynamic changes of user interests. Secondly, we design different update frequencies to extract user interest features at multiple time scales. Finally, we model the dependency of user interest features at different time scales through scale-dimensional convolution to generate a unified representation of user interest features at multiple time scales, which can be used to predict the items of interest to users. To validate its effectiveness, we conducted extensive experiments on three public datasets, and the results demonstrate that the MTSC model achieves state-of-the-art performance across all baselines. More precisely, on the Steam dataset, the Precision@10 metric of the MTSC model improved by 4.73% compared to the best baseline model, robustly validating the effectiveness and superiority of the proposed method.







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Acknowledgements
This work was supported in part by the Zhejiang Provincial Department of Education Research Project Funding under Grant (No. Y202455123), in part by the Hangzhou Dianzi University Research Initiation Grant (No. KYS275624270), in part by the Natural Science Foundation of Hebei Province (No. F2024501021), in part by the Fundamental Research Funds for the Central Universities (No. N2423015), and in part by the National Natural Science Foundation of China supported our research (No. U22A2035). We conducted the numerical calculations on Wuhan University’s Supercomputing Center system. We thank the center for furnishing us with the computational resources.
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Nana Huang contributed to the conceptualization, methodology, validation, investigation, data curation, writing—original draft, and writing—review and editing. Hongwei Ding was involved in the conceptualization, validation, investigation, data curation, writing—original draft, and writing—review and editing. Ruimin Hu contributed to the conceptualization, writing—review and editing, formal analysis, and funding acquisition. Pengfei Jiao performed the conceptualization, writing—review and editing, and data curation. Zhidong Zhao assisted in the conceptualization, writing—review and editing, and formal analysis. Bin Yang contributed to the conceptualization and writing—review and editing. Qi Zheng was involved in writing—review and editing.
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Huang, N., Ding, H., Hu, R. et al. Multi-time-scale with clockwork recurrent neural network modeling for sequential recommendation. J Supercomput 81, 412 (2025). https://doi.org/10.1007/s11227-025-06925-4
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DOI: https://doi.org/10.1007/s11227-025-06925-4