Funding for this research was provided by:
National Natural Science Foundation of China (11471004)
Research Project at Yuncheng University (XK2012007)
Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province (2019L0868)
the Project of the Youth Fund of Shanxi (201901D211461)
Article History
Received: 27 April 2018
Accepted: 29 June 2020
First Online: 13 July 2020