基金Supported by the National Natural Science Foundation of China(61373174)Supported by the Education Committee Research Foundation of Chongqing(KJ131314)Emphasis Research Project of Yangtze Normal University(2013XJZD006)
基金supported by NSFC(No.61373174)Key Research Project of Yangtze Normal University(No.2013XJZD006)Research Startup Project of Introduction Talent of Yangtze Normal University(No.2014KYQD02)