1. Department of Electronic Engineering, Information School, Yunnan University, Kunming, Yunnan 650091, China. E-mails: 962245641@qq.com, yfengzhang@yahoo.com, 3002380@qq.com, 1162019872@qq.com, 617674101@qq.com, ghcai@ynu.edu.cn, jhzhang@ynu.edu.cn
2. Cardiovascular Department, The Second Affiliated Hospital of Kunming Medical College, Kunming, Yunnan 650031, China. E-mail: zhangkexingkm@vip.sina.com