Funding for this research was provided by:
National Natural Science Foundation of China (21501044)
Development of Science and Technology Plan Projects of Henan Province (182102410075)
Department of Education Science and Technology Research Key Projects of Henan (16A150004)
Program for Innovative Research Talents from the University of Henan Province (18HASTIT049)
Special Professor project of Henan University
Article History
Received: 19 June 2018
Accepted: 3 August 2018
First Online: 29 September 2018
Competing Interests
: The authors declare that they have no competing interests.
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