1. Shonan Institute of Technology,Department of Information Science,Kanagawa,Japan
2. Chiba University,Faculty of Education,Chiba,Japan
3. Junior College of Aizu,Department of Industrial Information Science,Fukushima,Japan
4. Waseda University,Faculty of Education and Integrated Arts and Sciences,Tokyo,Japan
5. Waseda University,Center for Data Science,Tokyo,Japan
6. Waseda University,Research Institute for Science and Engineering,Tokyo,Japan