1. School of Electrical Engineering, Zhengzhou University, Zhengzhou 450001, China
2. Cooperative Innovation Center of Internet Healthcare, Zhengzhou University, Zhengzhou 450001, China
3. Industrial Technology Research Institute, Zhengzhou University, Zhengzhou 450001, China
4. State Key Laboratory of Mathematical Engineering and Advanced Computing, Zhengzhou Science and Technology Institute, Zhengzhou 450003, China