Funding for this research was provided by:
Scientific and Technological Research Program of Chongqing Municipal Education Commission (KJ1501405, KJ1501409)
Scientific and Technological Research Program of Chongqing University of Education (KY201522B, KY201520B)
Fundamental Research Funds for the Central Universities (XDJK2016E068)
Natural Science Foundation of China (61170192)
National High-tech Research and Development Program (2013AA013801)