School of Mathematics and Physics;
North China Electric Power University;
Beijing 102206;
China;
Cardiovascular Research Laboratories;
Departments of Medicine and Biomathematics;
David Geffen School of Medicine;
University of California;
Los Angeles;
Los Angeles;
CA 90095;
USA;
Institute of Systems Science and College ofInformation Science and Engineering;
Huaqiao University;
Xiamen 361021;
China;