College of Automation;
Chongqing University;
Chongqing 400044;
China;
Dept. of Mathematics & Information Engineering;
Chongqing University of Education;
Chongqing 400065;
China;
College of Automation;
Chongqing University;
Chongqing 400044;
China;
Dept. of Mathematics & Information Engineering;
Chongqing University of Education;
Chongqing 400065;
China;
Dept. of Mathematics & Information Engineering;
Chongqing University of Education;
Chongqing 400065;
China;