| Affiliation: | 1. State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China;2. School of Economics and Management, Beijing University of Posts and Telecommunications, Beijing 100876, China;3. School of Electronics and Information Engineering, Wuhan Donghu University, Wuhan 430212, China;4. Department of Physics, Chemistry and Mathematics, Alabama A&M University, Normal AL-35762, USA;5. Department of Mathematics, King Abdulaziz University, Jeddah 21589, Saudi Arabia;6. Department of Mathematics and Statistics, Tshwane University of Technology, Pretoria 0008, South Africa |
