[1] Hebei United Univ, Coll Sci, Tangshan 063009, Peoples R China
[2] Yanshan Univ, Coll Mech Engn, Qinhuangdao 066004, Peoples R China
[3] Hebei United Univ, Coll Met & Energy, Tangshan 063009, Peoples R China
[4] Univ Salerno, Dept Math, I-84084 Salerno, Italy
[5] Northwestern Polytech Univ, Sch Mech Engn, Xian 710048, Shaanxi, Peoples R China
[6] Bu Ali Sina Univ, Dept Mech Engn, Hamadan, Iran
[7] Hebei United Univ, Qinggong Coll, Tangshan 063009, Peoples R China
[8] China Univ Min & Technol, Dept Math & Mech, Xuzhou 221008, Jiangsu, Peoples R China