Funding for this research was provided by:
National Natural Science Foundation of China (51434003)
Basic and Frontier Research Projects of Chongqing (cstc2016jcyjA0117)
Fundamental Research Funds for the Central Universities (106112017CDJQJ248825)
Article History
Received: 11 May 2018
Accepted: 30 November 2018
First Online: 6 December 2018