Funding for this research was provided by:
National Key Research and Development Program of China (2020YFA0710902)
Sichuan Science and Technology Program (No.2019YJ0227)
China Postdoctoral Science Foundation (2019M663550)
State Key Laboratory of Traction Power (2019TPL_T02)
Article History
Received: 11 April 2020
Revised: 25 January 2021
Accepted: 19 August 2021
First Online: 14 September 2021
Competing Interests
: The authors declare no competing financial interests.