This work is supported by the Scientific Research Project in Fujian University of Technology (GY-Z160130, GY-Z160138, GY-Z160066), the Natural Science Foundation of Fujian Province of China (2017J05098, 2017H0003, 2018Y3001), Project of Fujian Education Department Funds (JK2017029, JZ160461) and Project in Fujian Provincial Education Bureau (JAT160328, JA15325) and Project of Science and Technology Development Center, Ministry of Education (2017A13025).
The authors also gratefully acknowledge the helpful comments and suggestions of the reviewers, which have improved the presentation.