1. Dept. of Industrial and Systems Engineering; The Hong Kong Polytechnic University; Hong Kong SAR China
2. School of Chemistry and Chemical Engineering; Chongqing University; Chongqing 400044 China
3. Dept. of Industrial Engineering; CESQA University of Padua; Via Marzolo 9, 35131 Padua Italy
4. School of Chemical Engineering and Technology, Guangdong Engineering Center for Petrochemical Energy Conservation; Sun Yat-sen University; Zhuhai 519082 China