Power Transmission Technology College, Northeast DianLi University, JiLin JiLin, China
Economy Management College, Northeast DianLi University, JiLin JiLin, China

Copyright © He-ru Sun, Wei Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

How to Cite this Article

Download citation as EndNote