Corrigendum to "Experimental and numerical research on the performance characteristics of OPLVCR engine based on the NSGA II algorithm using digital twins" [Energy Convers. Manage. 236 (2021) 114052]. (1st August 2021) - Guan, Jinhuan; Li, Yangyang; Liu, Jingping; Duan, Xiongbo; Shen, Dazi; Jia, Dongdong; Ku, Caibang