Funding for this research was provided by:
National Natural Science Foundation of China (50905001, 51074204)
Beijing Municipal Natural Science Foundation (3112010)
Beijing Municipal Natural Science Foundation-Beijing Municipal Education Commission (KZ201910009011)
Beijing Youth Talent Support Program (2014000026833ZK12)
Yujie Talent Support Program of North China University of Technology (18XN154-005)
Article History
Received: 18 August 2018
Revised: 16 November 2018
Accepted: 26 November 2018
First Online: 14 March 2019