1. Innovation
Research Center for
Fuel Cells, The University of Electro-Communications, Choufugaoka, Chofu, Tokyo 182-8585, Japan
2. Department
of Mathmatical and
Material Sciences, Faculty of Integrated Arts and Sciences, The University of Tokushima, Minamijosanjima-cho, Tokushima
770-8502, Japan
3. Japan Synchrotron Radiation Research Institute, Spring-8, Koto, Sayo,
Hyogo 679-5198, Japan
4. Department of Engineering Science,
Graduate School of Information Engineering Science, The University of Electro-Communications, Choufugaoka, Chofu,
Tokyo 182-8585, Japan