1. China People's Police University
2. Langfang 065000
3. China
4. Key Laboratory of Polymer Material Advanced Manufacturing Technology of Shandong Province
5. College of Electromechanical Engineering
6. College of Sino-German Science and Technology
7. Qingdao University of science and Technology
8. Qingdao 266061
9. Energy Research Institute
10. Qilu University of Technology (Shandong Academy of Science)
11. Jinan 250014