Computer Engineering and Technology 23rd CCF Conference, NCCET 2019, Enshi, China, August 1-2, 2019, Revised Selected Papers - Xu, Weixia; Xu, Weixia; Xiao, Liquan; Xiao, Liquan; Li, Jinwen; Li, Jinwen; Zhu, Zhenzhen; Zhu, Zhenzhen (Springer Singapore : Imprint: Springer, 2019)