FAN GUO1,2, HUI PENG1,2,3 AND JIN TANG1
1School of Information Science and Engineering
Central South University
Hunan, 410083 P.R. China
2Collaborative Innovation Center of Resource-Conserving and
Environment-Friendly Society and Ecological Civilization
Hunan, 410083 P.R. China
E-mail: huipeng@csu.edu.cn