1. School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo, China
2. School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
3. Institute of Energy Engineering, Technische Universität Berlin, Berlin, Germany
4. Fakultät für Verfahrens und Systemtechnik, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Germany