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A personalised movie recommendation system based on collaborative filtering[J]. International journal of high performance computing and networking, 2017, 10(1/2): 54–63. [23] ZHENG E, KONDO G Y, ZILORA S, et al. Tag-aware dynamic music recommendation[J]. Expert systems with applications, 2018, 106: 244–251. [24] ZHENG Guanjie, ZHANG Fuzheng, ZHENG Zihan, et al. DRN: a deep reinforcement learning framework for news recommendation[C]//Proceedings of the 2018 World Wide Web Conference. Lyon, France, 2018: 167–176. [25] COLOMO-PALACIOS R, GARCÍA-PEÑALVO F J, STANTCHEV V, et al. Towards a social and context￾aware mobile recommendation system for tourism[J]. Per￾vasive and mobile computing, 2017, 38: 505–515. [26] [27] GENTRY C. A fully homomorphic encryption ·184· 智 能 系 统 学 报 第 16 卷