1. Department of Mathematics Guizhou University Guiyang Guizhou China
2. Supercomputing Algorithm and Application Laboratory of Guizhou University and Gui'an Scientific Innovation Company Guizhou University Guiyang Guizhou China
3. School of Information Engineering Guizhou Open University Guiyang Guizhou China
4. Department of Mathematical Analysis and Numerical Mathematics, Faculty of Mathematics, Physics and Informatics Comenius University in Bratislava Bratislava Slovakia
5. Mathematical Institute Slovak Academy of Sciences Bratislava Slovakia