Funding for this research was provided by:
National Natural Science Foundation of China (61301250)
Outstanding young academic leaders of Higher Learning Institutions of Shanxi ([2015]3)
Collaborative Innovation Center of Internet+3D Printing in Shanxi Province, Scientific and Technological Innovation Team of Shanxi Province (201705D131025)
Key Research and Development Project of Shanxi Province (201803D421035)
Article History
Received: 16 March 2018
Revised: 8 January 2019
Accepted: 11 January 2019
First Online: 19 January 2019