Smart City and Informatization 7th International Conference, iSCI 2019, Guangzhou, China, November 12-15, 2019, Proceedings - Wang, Guojun; Wang, Guojun; El Saddik, Abdulmotaleb; El Saddik, Abdulmotaleb; Lai, Xuejia; Lai, Xuejia; Martinez Perez, Gregorio; Martinez Perez, Gregorio; Choo, Kim-Kwang Raymond; Choo, Kim-Kwang Raymond (Springer Singapore : Imprint: Springer, 2019)