[1] Technova Inc, Dept Res & Dev, Chiyoda Ku, 13th Fl,Imperial Hotel Tower,1-1 Uchisaiwai Cho,1, Tokyo 1000011, Japan
[2] Tokyo Univ Marine Sci & Technol, Dept Marine, Dept Elect & Mech Engn, Tokyo, Japan
[3] Natl Marine Res Inst, Nav & Syst Egng Dept, Tokyo, Japan
[4] Kawasaki Heavy Ind Co Ltd, Chem Technol Dept, Tokyo, Japan
[5] Taiyo Elect Co Ltd, Gifu Factory, Dev Dept, Gifu, Japan