3Traub J F,Wozniakowski G W.A General Theory of Optimal Algorithems[M].New York:Academic Press,1988.
4Fang Gensun,Liu Yongping.Average Width and Optimal Interpolation of the Sobolev-Wiener Class Wrpqin the Metric Lq(R)[J].J Approx Theory,1993,74:335-352.
5Jiang Yanjie.Optimal Recovery of Anisotropic Besov-Wiener Classes[J].Anal Math,2002,28:77-88.
6S M Nikolski.Approximation of Functions of Several Variables and Imbedding Theorem[M].Berlin Heidlberg,New York:Springer-Verlag,1975.
7Ronald De Vore,George G.Lorentz,Constructive Approximation[M].Berlin:Springer-Verlag,1993.