Cloud Computing, Smart Grid and Innovative Frontiers in Telecommunications 9th EAI International Conference, CloudComp 2019, and 4th EAI International Conference, SmartGIFT 2019, Beijing, China, December 4-5, 2019, and December 21-22, 2019 - Zhang, Xuyun; Liu, Guanfeng; Qiu, Meikang; Xiang, Wei; Huang, Tao (Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2020)