Open Access
Issue
JNWPU
Volume 36, Number 5, October 2018
Page(s) 988 - 994
DOI https://doi.org/10.1051/jnwpu/2018365988
Published online 17 December 2018

© 2018 Journal of Northwestern Polytechnical University. All rights reserved.

Licence Creative CommonsThis is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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