Abstract
In e-commerce platforms, mining temporal characteristics in user behavior is conducive to recommend the right product for the user at the right time. Recently, recurrent neural networks (RNNs) based methods have achieved profitable performance in exploring temporal features, however, in complex e-commerce scenarios, user preferences changing over time have not been fully exploited. In order to fill the gap, we propose a novel representation for user preferences with the inspiration of a quantum concept, density matrix. It encodes a mixture of item subspaces and represents distribution of user preferences at one time stamp. Further, such a representation and RNNs are combined to form our proposed Density Matrix based Preference Evolution Networks (DMPENs). Experiments on Amazon datasets as well as real-world e-commerce datasets demonstrate the effectiveness of the proposed methods, which achieve rapid convergence and superior performance compared with the state-of-the-art methods in terms of AUC and accuracy.
Keywords
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Acknowledgement
This work is funded in part of the National Key R&D Program of China (2017YEF0111900), the National Natural Science Foundation of China (61876129), the National Natural Science Foundation of China (Key Program, U1636203), the Alibaba Innovation Research Foundation 2017 and the European Unions Horizon 2020 research and innovation programme under the Marie Skodowska-Curie grant agreement No. 721321. Part of the work was performed when Panpan Wang visited the Alibaba Inc. in 2018.
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Wang, P., Li, Z., Pan, X., Ding, D., Chen, X., Hou, Y. (2019). Density Matrix Based Preference Evolution Networks for E-Commerce Recommendation. In: Li, G., Yang, J., Gama, J., Natwichai, J., Tong, Y. (eds) Database Systems for Advanced Applications. DASFAA 2019. Lecture Notes in Computer Science(), vol 11447. Springer, Cham. https://doi.org/10.1007/978-3-030-18579-4_22
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