Authors
Lv Zhengdong
Beijing University of Posts and Telecommunications,, Beijing, China
Wang Maonan
Beijing University of Posts and Telecommunications,, Beijing, China
© 2017 Li Yajie, Lv Zhengdong, Wang Maonan, published by Gdansk University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.