1. School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
2. Department of Railroad Integrated Systems, Woosong University, Daejeon 34606, Republic of Korea
3. Simulate Anything, Inc., Hopkinton, MA 01748, USA
4. Wentworth Institute of Technology, Boston, MA 02115, USA
5. Massachusetts Institute of Technology, Cambridge, MA 02139, USA