1. Shaanxi Engineering Research Center of Controllable Neutron Source, School of Electronic Information, Xijing University, Xi'an, Shaanxi, People's Republic of China
2. Center of Modern Educational Technology, Guizhou University of Finance and Economics, Guiyang, Guizhou, People's Republic of China
3. China Construction Seventh Engineering Division Corp. Ltd., Zhengzhou, Henan, People's Republic of China
4. Shaanxi Engineering Research Center of Controllable Neutron Source, School of Science, Xijing University, Xi'an, Shaanxi, People's Republic of China