1. College of Petrochemical Technology; Lanzhou University of Technology; Lanzhou 730050 People's Republic of China
2. School of Life Science and Technology; Harbin Institute of Technology; Harbin 150080 People's Republic of China
3. CAS Key Lab of Biological Effects of Nanomaterials and Nanosaftey; National Center of Nanoscience and Technology; Beijing 100190 People's Republic of China
4. Department of Machine Intelligence and Systems Engineering Faculty of Systems Engineering; Akita Prefectural University; Akita 015-0055 Japan