1. State Key Laboratory of Synthetical Automation for Process Industries, Northeastern University, Shenyang, China
2. Department of Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle upon Tyne, U.K.
3. Daniel Guggenheim School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA, USA
4. Faculty of Electrical Engineering, Czech Technical University, Prague, Czech Republic
5. Energy and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA