About author:CAO Xiao-shuang(1988-), female, native of Zhongxiang, Hubei, a postgraduate of Hubei
Normal University, engages in nonlinear analysis; XU Shao-yuan(1964-), male, native of Wuhan, Hubei, a
professor of Hanshan Normal University, engages in nonlinear analysis(corresponding author).
Supported by:
Supported by the Natural Science Foundation of Hubei Province Education Department(Q20132505)； Supported by the Ph D Start-up Fund of Hanshan Normal University of Guangdong Province（QD20110920）；
