Authors
Xin Liu
College of Information Science and Engineering Ocean, University of China, Qingdao, China
Zhiqiang Wei
College of Information Science and Engineering Ocean, University of China, Qingdao, China
© 2018 Xin Liu, Zhiqiang Wei, published by Xi’an Technological University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.