[1] Tongji Univ, Sch Math Sci, Shanghai 200092, Peoples R China
[2] Tongji Univ, Key Lab Intelligent Comp & Applicat, Minist Educ, Shanghai 200092, Peoples R China
[3] Shanghai Jiao Tong Univ, Inst Nat Sci, Sch Math Sci, Shanghai 200240, Peoples R China
[4] Shanghai Jiao Tong Univ, MOE LSC, Shanghai 200240, Peoples R China
[5] Northwestern Polytech Univ, Sch Math & Stat, Xian 710072, Peoples R China
[6] Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China