1. Department of Physics, School of Science, Aristotle University of Thessaloniki, GR-541 24, Thessaloniki, Greece
2. LMIB and School of Mathematics and Systems Science, Beihang University, Beijing 100191, P. R. China
3. Peng Cheng Laboratory, Shenzhen, Guangdong 518055, P. R. China
4. Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University, Beijing 100191, P. R. China
5. Department of Applied Mathematics, University of Alicante, Carretera San Vicente del Raspeig s/n, 03690, Alicante, Spain
6. Nonlinear Analysis and Applied Mathematics (NAAM)-Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah 21589, Saudi Arabia