1. College of Electromechanical Engineering
2. Key Laboratory of Polymer Material Advanced Manufactorings Technology of Shandong Provincial
3. Qingdao University of Science and Technology
4. Qingdao 266061
5. P. R. China
6. State Key Laboratory Base of Eco-chemical Engineering
7. College of Chemistry and Molecular Engineering
8. Qingdao 266042
9. Department of Mathematics and Physics
10. Qingdao
11. China