... PR China2Department of Mathematics, Shandong University, Jinan 250100, PR ChinaAuthors’ contributionsJQ drafted the manuscript and have made outstanding contributions to this paper. JD and ... and Physics, Shanghai Dianji University,Shanghai 200240, PR ChinaFull list of author information isavailable at the end of the articleAbstract In this paper, we continue to study a special nonlinear ... r),Qi et al. Journal of Inequalities and Applications 2011, 2011:50http://www.journalofinequalitiesandapplications.com/content/2011/1/50Page 6 of 10As pointed out by Li and Yang [4], Equation (1.2)...