1. Guangdong ATV Vocational College for the Performing Arts, Dongguan, China
2. School of Information and Control Engineering, China University of Mining and Technology, Xuzhou, China
3. Department of Mathematics, National University of Modern Languages, Islamabad, Pakistan
4. Department of Mathematics, Quaid-i-Azam University, Islamabad, Pakistan
5. Nanchang Institute of Technology, Nanchang, China
6. Department of physics, college of science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia