1. School of Mathematics and Statistics, Northwestern Polytechnical University, Xi'an 710129, China
2. School of Mathematics and Statistics, Xinyang Nomal University, Xin'yang 464000, China
3. NPU-UoG International Cooperative Lab for Computation and Application in Cardiology, Xi'an, 710129, China
4. Xi'an Key Laboratory of Scientific Computation and Applied Statistics, Xi'an, 710129, China