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991.
本文证明加Ap权的Marcinkiewicz-Zygmund不等式,并指出对权所加的Ap条件是必要的,最后还把这些结果应用于Lagrange插值多项式加权平均逼近阶的估计。 相似文献
992.
In this paper, we study a flexible piecewise approximation technique based on the use of the idea of the partition of unity. The approximations are piecewisely defined, globally smooth up to any order, enjoy polynomial reproducing conditions, and satisfy nodal interpolation conditions for function values and derivatives of any order. We present various properties of the approximations, that are desirable properties for optimal order convergence in solving boundary value problems.
AMS subject classification 65N30, 65D05Weimin Han: Corresponding author. The work of this author was partially supported by NSF under grant DMS-0106781.Wing Kam Liu: The work of this author was supported by NSF. 相似文献
993.
三次样条插值离子选择电极测定人发中的氟和碘 总被引:2,自引:0,他引:2
对同时测定同一底液中的氟和碘进行了探讨,找到了合适的1.0mol/L柠檬酸钠-1.0mol/L NaNO3 pH=5.5的缓冲体系。采用三次样条插值程序可很好地解决曲线的弯曲问题,改善了含氮和碘量低分析结果的准确度、精度官及检测下限。 相似文献
994.
R. A. Brownlee 《Numerical Algorithms》2005,39(1-3):57-68
The error between appropriately smooth functions and their radial basis function interpolants, as the interpolation points fill out a bounded domain in Rd, is a well studied artifact. In all of these cases, the analysis takes place in a natural function space dictated by the choice of radial basis function – the native space. The native space contains functions possessing a certain amount of smoothness. This paper establishes error estimates when the function being interpolated is conspicuously rough.
AMS subject classification 41A05, 41A25, 41A30, 41A63R.A. Brownlee: Supported by a studentship from the Engineering and Physical Sciences Research Council. 相似文献
995.
Guo-liang Xu 《计算数学(英文版)》2001,(2)
1. IntroductionWe consider the problem of constructing Cd (m 2 0) piecewise rational local interpolation tothe data on a domain in m3 that is assumed to have been tessellated icao tetrahedra (we denotethe tessellation by 'T). The scheme requires the following data: The partial derivatives of orders at each vertex for s = 0, 1,'' 5 Zm, partial derivatives of order s at s equally (no necessary)distributed points (excluding the end points) on each edge, and 1 [(m+Zs) (m+Zs -- 1) --3s(8 -- 1)]r… 相似文献
996.
Gao Junbin 《Journal of Computational and Applied Mathematics》1992,40(3):305-312
In this paper, we give a new finite element with dimension 16 of C1 cubic splines which have interpolation schemes on the Morgan-Scott construction 0 of a triangle. 相似文献
997.
本文给出了基于之零点的(0,1,…,m-2,m)插值的正则性的充要条件,其中为(n-1)次Laguerre多项式。同时基函数(若存在的话)的明显表达式也在文中给出。再者,还证明了,若该插值问题有无穷多个解,则其解的一般形式为f_0(x)+Cf_1(x)这里C为任意常数。 相似文献
998.
This paper is concerned with numerical methods in range restricted histopolation. The proposal is to apply splines on refined
grids. The ratios of the added split points are considered to be parameters. In this way, by choosing suitable spline classes,
range restricted histosplines can always be constructed if the restrictions are compatible with the given histogram. We offer
an algorithm for solving the bivariate problem on a rectangular grid which utilizes univariate results as well as tensor product
techniques.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
999.
O. E. Tikhonov L. V. Veselova 《Proceedings of the American Mathematical Society》1998,126(4):1049-1054
We prove that an arbitrary Banach couple is uniquely determined by the collection of all its interpolation spaces, which extends a result by N. Aronszajn and E. Gagliardo.
1000.