Funding for this research was provided by:
National Natural Science Foundation of China (51507022)
Science and Technology Research Program of Chongqing Municipal Education Commission (KJ1703067)
The Top Talent Plan of Chongqing Normal University (020303070059)
Article History
Received: 21 February 2018
Accepted: 6 September 2018
First Online: 14 November 2018