1. Ebara Manufacturing Company Ltd., Kanagawa, Japan
2. Department of Human Information Engineering, Faculty of Computer Science and Systems Engineering, Okayama Prefectural University, Okayama, Souzya-shi, Japan
3. Department of Industrial and Systems Engineering, College of Science and Technology, Aoyama Gakuin University, Chuo-ku, Sagamihara-shi, Kanagawa, Japan
4. Department of Advanced Science, Faculty of Science and Technology, Hosei University, Tokyo, Koganei, Japan