- Correspondence to Mr Susu Liu, School of Mechanical Engineering, Nantong University, Nantong 226019,China ; and Professor C Xu, School of Mechanical Engineering Nanjing University of Science and Technology Nanjing China ;
- Received September 8, 2017
- Revision received November 15, 2017
- Accepted November 19, 2017
- First published December 25, 2017.
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