1. College of Mathematics, Taiyuan University of Technology, Taiyuan, Shanxi, China
2. Department of Scientific Computing, Florida State University, Tallahassee, FL, USA
3. Department of Mathematics, North University of China, Taiyuan, Shanxi, China
4. Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
5. Beijing Key Laboratory of Metabolic Disorders Related Cardiovascular Diseases, Capital Medical University, Beijing, China