Funding for this research was provided by:
National Natural Science Foundation of China (51708457, 11790283, 51978587)
State Key Laboratory of Traction Power (2019TPL-T16)
China Association for Science and Technology (2018QNRC001)
State Administration of Foreign Experts Affairs (B16041)
Article History
Received: 23 September 2020
Revised: 4 November 2020
Accepted: 6 November 2020
First Online: 30 November 2020