Artificial Intelligence Second CCF International Conference, ICAI 2019, Xuzhou, China, August 22-23, 2019, Proceedings - Knight, Kevin; Knight, Kevin; Zhang, Changshui; Zhang, Changshui; Holmes, Geoff; Holmes, Geoff; Zhang, Min-Ling; Zhang, Min-Ling (Springer Singapore : Imprint: Springer, 2019)