1. College of Mathematics and Systems Science, Shandong University of Science and Technology, Qingdao, Shandong, China
2. Department of Mathematics and Statistics, IIUI, Islamabad, Pakistan
3. Department of Mechanical Engineering, University of California Riverside, Riverside, CA, USA
4. Center for Communications and IT Research, Research Institute, King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia