Luo, Xue-ping http://orcid.org/0000-0001-5684-6089
Funding for this research was provided by:
National Natural Science Foundation of China (11701480)
Innovation Team Funds of Southwest University for Nationalities (14CXTD03)
Innovative Research Team of the Education (15TD0050)
Sichuan Youth Science and Technology Innovation Research Team (2017TD0028)
Fundamental Research Funds for the Central Universities, Southwest University for Nationalities (2018HQZZ23)
Key Projects of the Education Department of Sichuan Province (18ZA0511)
Article History
Received: 14 December 2017
Accepted: 27 March 2018
First Online: 2 April 2018