Energy-efficient cell-association bias adjustment algorithm for ultra-dense networks SCIENCE CHINA Information Sciences 61, 022306 (2018); Energy efficiency based joint cell selection and power allocation scheme for HetNets 数字通信和网络 2, 184 (2016); A user-selected uplink power control algorithm in the two-tier femtocell network SCIENCE CHINA Information Sciences 58, 042303 (2015); UMBRELLA: user demand privacy preserving framework based on association rules and differential privacy in social networks SCIENCE CHINA Information Sciences 62, 039106 (2019); Mobility-driven user-centric AP clustering in mobile edge computing-based ultra-dense networks 数字通信和网络 6, 210 (2020);. RESEARCH PAPER. SCIENCE CHINA Information Sciences