[1] Southeast Univ, Dept Math, Nanjing 210096, Jiangsu, Peoples R China
[2] Hangzhou Dianzi Univ, Dept Math, Hangzhou 310018, Zhejiang, Peoples R China
[3] Southeast Univ, Key Lab Measurement & Control Complex Syst Engn, Minist Educ, Nanjing 210096, Jiangsu, Peoples R China
[4] Zhejiang Univ Technol, Coll Informat Engn, Hangzhou 310023, Zhejiang, Peoples R China