Yuan, Suzhen
Lu, Yongle
Mao, Xuefeng
Luo, Yuan
Yuan, Jianguo
Funding for this research was provided by:
the Natural Science Foundation of Chongqing City (CSTC2016jcyjA2063)
the Natural Science Foundation of Chongqing City (CSTC2015jcyjA0554)
the Scientific and Technological Research Program of Chongqing Municipal Education Commission (A2015-39)
the Natural Science Foundation of Chongqing University of Posts and Telecommunications (A2015-48)