Funding for this research was provided by:
the National Natural Science Foundation of China (No.11774031)
the Winter Olympics key project Technology Fund (2018YFF0300804)
Beijing Science and Technology Project (No.Z181100005918002)
Article History
Received: 28 November 2019
Revised: 4 November 2020
Accepted: 27 January 2021
First Online: 14 February 2021