Affiliation: | 1. Department of Mathematics, Thiruvalluvar University, Vellore, Tamil Nadu 632 115, India;2. School of Mathematics, China University of Mining and Technology, Xuzhou 221116, China;1. School of Automation, Huazhong University of Science and Technology, Wuhan, PR China;2. Science Program, Texas A & M University at Qatar, Doha 23874, Qatar;3. School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu, PR China |