Dependable Multi-population Improved Brain Storm Optimization with Differential Evolution for Optimal Operational Planning of Energy Plants - Kiyo Arai; Tatsuya Iizaka; Tetsuro Matsui; Yoshikazu Fukuyama; 新井 馨; 松井 哲郎; 福山 良和; 飯坂 達也 (電気学会論文誌Ｂ（電力・エネルギー部門誌）, 2019)