1. Department of Mechanical Engineering, Hiroshima University, Higashi-Hiroshima, Japan
2. Center of Technology for the Environment, Agency for the Assessment and Application of Technology BPPT, Serpong, Indonesia
3. Mazda Motor Corporation, Hiroshima, Japan
4. Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, Japan
5. Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin, China