[1] Chengdu Univ, Sch Comp Sci, Chengdu 610106, Peoples R China
[2] COMSATS Univ Islamabad, Dept Math, Attock Campus, Attock 43600, Pakistan
[3] Chonnam Natl Univ, Dept Refrigerat & Air Conditioning Engn, Yeosu 59626, South Korea
[4] Gyeongsang Natl Univ, Dept Business Adm, Jinju 52828, South Korea