SchoolofInformationandControlEngineering;
SouthwestUniversityofScienceandTechnology;
Mianyang621002;
China;
InformationEngineeringSchool;
UniversityofScienceandTechnologyBeijing;
Beijing100083;
China;
SchoolofAdultsandOnlineDistanceEducation;
SouthwestUniversityofScienceandTechnology;
Mianyang621002;
China;