1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals
2. Lanzhou University of Technology
3. Lanzhou 730050
4. P. R. China
5. College of Petrochemical Technology
6. Lanzhou
7. Department of Machine Intelligence and Systems Engineering
8. Faculty of System Science and Technology
9. Akita Prefectural University
10. Yurihonjo
11. Akita 015-0055