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对任一函数f∈Lp[0,1],n阶Bernstein—Durrnieyer算子为 相似文献
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张南松 《高校应用数学学报(A辑)》1996,(1):75-82
本文解决了修正的Durrmeyer-Bernstein算子的特征刻划问题。 相似文献
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It is necessary to test for varying dispersion in generalized nonlinear models. Wei,et al (1998) developed a likelihood ratio test,a score test and their adjustments to test for varying dispersion in continuous exponential family nonlinear models. This type of problem in the framework of general discrete exponential family nonlinear models is discussed. Two types of varying dispersion, which are random coefficients model and random effects model, are proposed ,and corresponding score test statistics are constructed and expressed in simple ,easy to use ,matrix formulas. 相似文献
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具有常恢复率的艾滋病梯度传染模型 总被引:10,自引:0,他引:10
本文建立了一个具有常恢复率的同质人群艾滋病梯度传染模型,其中的性接触数是人群变量的函数,讨论了平衡点的存在性和稳定性,推广和改进了一些相关的已有结果。 相似文献
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BESOV空间中JACKSON算子的正逆定理 总被引:11,自引:3,他引:8
BESOV空间中JACKSON算子的正逆定理张南松(浙江农业大学基础部,杭州310029)周定轩(浙江大学数学系高等数学研究所,杭州310027)DIRECTANDINVERSETHEOREMSFORJACKSONOPERATORSINBESOVSP... 相似文献
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APPROXIMATE SOLUTION TO THE PARABOLIC EQUATIONS AND THEIR PICTURE DISPLAY ON THE COMPUTER 总被引:3,自引:0,他引:3
In this paper, we consider the approximate solution of the type Ⅰ , Ⅲ initial boundary valued problems of the second order linear parabolic partial differential equations. We use a new difference scheme by suitably combining the difference and the basic recursion of elements in the bivariate spline space S21(Δmn(2)) to construct the approximate solutions. We have proved their convengence. And we will give a flow diagraph to display curved surface on a computer, and give an example. 相似文献
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