1. School of Electronic and Information Engineering, Chongqing Three Gorges University,Chongqing,China,40044
2. Municipal Institutions of Higher Education, Chongqing Three Gorges University,Key Laboratory of Intelligent Information Processing and Control of Chongqing,Chongqing,China,40044
3. University of the District of Columbia,Department of Electrical and Computer Engineering,Washington, D.C.,USA,20008
4. College of Mathematics and Statistics, Chongqing Three Gorges University,Chongqing,China,40044