1. Mul2 Group, Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Torino, Italy
2. Department of Mechanical Engineering, College of Engineering, Prince Mohammad Bin Fahd University, Al Khobar, Saudi Arabia
3. School of Rail Transportation, Soochow University, Suzhou, PR China
4. School of Transportation and Civil Engineering, Nantong University, Nantong, PR China