[1] Hunan City Univ, Sch Sci, Yiyang 413000, Peoples R China
[2] Riphah Int Univ, Dept Math & Stat, I-14, Islamabad 44000, Pakistan
[3] Davangere Univ, Davangere, Karnataka, India
[4] Huzhou Univ, Dept Math, Huzhou 313000, Peoples R China
[5] Changsha Univ Sci & Technol, Hunan Prov Key Lab Math Modeling & Anal Engn, Changsha 410114, Peoples R China