The;
Department;
of;
Information,;
The;
452^nd;
Hospital;
of;
PLA,;
Chengdu;
610061,;
Sichuan,;
China;
School;
of;
Automation;
Engineering,;
University;
of;
Electronic;
Science;
and;
Technology;
of;
China,;
Chengdu;
611731,;
Sichuan,;
China;