Genetic and Evolutionary Computing Proceedings of the Twelfth International Conference on Genetic and Evolutionary Computing, December 14-17, Changzhou, Jiangsu, China - Pan, Jeng-Shyang; Pan, Jeng-Shyang; Lin, Jerry Chun-Wei; Lin, Jerry Chun-Wei; Sui, Bixia; Sui, Bixia; Tseng, Shih-Pang; Tseng, Shih-Pang (Springer Singapore : Imprint: Springer, 2019)