Funding for this research was provided by:
Ministry of education of Humanities and Social Science Project (18YJCZH257)
Natural Science Foundation of Hebei Province (D2017402159)
Program of Education Department of Hebei Province (BJ2018043)
Department of Education of Hebei Province (QN2018054)
National Natural Science Foundation of China (41590845)
China National Funds for Distinguished Young Scientists (41525004)
Article History
Received: 10 November 2018
Accepted: 9 January 2020
First Online: 25 January 2020