[Luo, Ying-she;Chen, Sheng-ming] Cent South Univ Forestry & Technol, Hunan Prov Key Lab Engn Rheol, Changsha 410004, Hunan, Peoples R China.^[Zhang, Yong-zhong;Ren, Jia;Zhang, Ling-tao] Cent South Univ Forestry & Technol, Coll Comp Sci & Informat Technol, Changsha 410004, Hunan, Peoples R China.^[Su, Jian-xin] Xiangtan Univ, Coll Informat Engn, Xiangtan 411105, Hunan, Peoples R China.