1. Anyang Vocational and Technical College, Foreign Affairs Office of Scientific Research, Anyang, Henan 455001, China
2. Department of Mathematics, Government College University, Katchery Road, Lahore 54000, Pakistan
3. Department of Mechanical Engineering, Sejong University, Seoul 05006, Republic of Korea
4. Department of Mathematics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand