1. Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology, Xi’an 710048, P. R. China
2. Shanxi Provincial Key Laboratory of Printing and Packaging Engineering, Xi’an University of Technology, Xi’an 710048, P. R. China
3. Shanxi Key Laboratory of Advanced Manufacturing Technology, North University of China, Taiyuan 038507, P. R. China
4. School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048, P. R. China