作者机构:[1]Department of Applied MathematicsAnhui University of Finance and Economics Bengbu 233030, P. R. China
相关基金:The work was supported by the NSF of China (11301001, 71171001), the NSF of Anhui Province (10040606Q01, 1208085QAll), the Key NSF of Education Depart- ment of Anhni Province (KJ2013A003, KJ2012A001) and the Excellent Youth Scholars Foundation of Education Department of Anhui Province (2012SQRL077, 2013SQRL030ZD).