1. Key Laboratory of New Processing Technology for Nonferrous Metal and Materials (Ministry of Education) Guangxi Key Laboratory of Optical and Electronic Materials and Devices Guilin University of Technology Guilin 541004 China
2. College of Chemistry and Chemical Engineering Yantai University Yantai 264005 China
3. Department of Machine Intelligence and Systems Engineering Faculty of Systems Science and Technology Akita Prefectural University Yurihonjo 015‐0055 Japan