Department of Electronic Engineering andScience Graduate School of Engineering Shibaura Institute of Technology Tokyo 135-8548 Japan;
Department of Information Technology Schoolof Business Information Technology University of Economics Ho Chi MinhCity Hue 530000 Vietnam;
Department of Intelligent Information Engineering Faculty of Science and Engineering Doshisha University Kyoto 602-8580 Japan;
Department of Electrical and ElectronicEngineering Faculty of Engineering Mie University Mie 514-8507 Japan;