quadratic approximation meaning in English
二次逼近
Examples
- Quadratic approximations in two dimensions
二维中的二次逼近法。 - This paper researchs into the problem on fitting the shell flight - time of anti - aircraft gun by interpolation and quadratic approximation
摘要用插值拟合和最小二乘逼近拟合方法对高炮射弹飞行时间拟合问题进行了研究。 - By analysing the compute result of the quadratic approximation formula , we educe the conclusion that 3 is the best rank code for the quadratic approximation formula
通过对最小二乘拟合公式实际计算结果的分析，得出了“拟合公式阶数取3为最佳”的结论。 - Using the conic function model local approximation , w . cdavidon ( 1980 ) proposed a class of iterative algorithms with modified matrix combining function value , furthermore under the theory d . c . sorensen has used local quadratic approximation method , then applying collinear scaling idea improving on the above algorithm and generalizing it , getting a class of collinear scaling algorithm , unifying former quasi - newton . in the paper , using local quadratic approximation method , the first , constructing the new collinear scaling gene , getting a class of the new collinear scaling algorithm with briefness and numerical stability , . , we discusses some properties of the algorithm and its local linear convergence , q - superlinear convergence and the whole convergence ; secondly we have made numerical experimentation and numerical analysis ; the last , we have done much discussion for collinear scaling idea and given the several new collinear scaling algorithm
本文的工作就是基于局部二次逼近原理，首先通过构造新的共线调比因子，得到了一类新的更简洁，数值稳定性更好的共线调比算法，进而我们给出了本共线调比算法的局部收敛性，全局收敛性以及算法q -超线性速度的理论证明；其次，用经典的无约束优化五大考核函数就本共线调比算法进行了数值试验和数值分析；最后，就局部二次逼近思想，进行共线调比算法思想进行更广泛的讨论，给出了几个新共线调比算法。