Authors
Junhua Ku
Department of information engineering, Hainan institute of science & technology, Haikou, China
Kongduo Xing
Department of information engineering, Hainan institute of science & technology, Haikou, China
© 2018 Junhua Ku, Kongduo Xing, published by Xi’an Technological University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.