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<正> 1 Notions and LemmasIn this paper,denote by f={F_n,f_n,n≥0),or f=(f_n)_(n≥0) if there is no confu-sion,the bounded martingale in L~2,f_0=0.Let h(x) be a strictly increasing continousfunction,h(0)=0,Φ(x) be a convex function.Composite function of