Funding for this research was provided by:
National Natural Science Foundation of China (61300171)
Natural Science Foundation of Beijing Municipality (4172019)
Beijing Natural Science Foundation and Education Commission (KZ201810009011)
Science and Technology Innovation Project of North China University of Technology (18XN053)
Article History
Received: 17 December 2018
Accepted: 8 May 2019
First Online: 20 June 2019