1. Department of Energy and Power Engineering School of Mechanical Engineering Beijing Institute of Technology Beijing 100081 P. R. China
2. Department of Industrial Engineering Department of Chemical Sciences University of Padova Via Marzolo 1 I-35131 Padova Italy
3. School of Textile and Material Engineering Dalian Polytechnic University Liao Ning Dalian 116034 P. R. China
4. School of Materials and Metallurgy University of Science and Technology Liaoning Liao Ning Anshan 114051 P. R. China