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泰勒级数与傅里叶级数在复数域中的统一实现
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作者 赖祥鑫 卢卫君 韦煜明 《广西民族大学学报(自然科学版)》 CAS 2018年第2期52-55,97,共5页
泰勒级数是无穷维单项式基底{1,x,x2,…,xn,…}的线性组合,其系数用高阶导数来表示;而傅里叶级数是无穷维正交三角系{1,cosθ,sinθ,cos2θ,sin2θ,…,cosnθ,sinnθ,…}的线性组合,其系数用三角函数在一个周期的积分来表示.文章主要探... 泰勒级数是无穷维单项式基底{1,x,x2,…,xn,…}的线性组合,其系数用高阶导数来表示;而傅里叶级数是无穷维正交三角系{1,cosθ,sinθ,cos2θ,sin2θ,…,cosnθ,sinnθ,…}的线性组合,其系数用三角函数在一个周期的积分来表示.文章主要探讨这两种级数的关联,揭示它们在实数域上毫无联系却能在复数域上实现高度的统一;并举例阐明这种统一所带来的简明计算效果. 展开更多
关键词 泰勒级数 傅里叶级数 复数域 统一的应用
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Blockwise Empirical Likelihood Method for Spatial Dependent Data
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作者 TANG Jie ZOU Yunlong +1 位作者 QIN Yongsong LI Yufang 《应用数学》 2025年第1期47-63,共17页
Existing blockwise empirical likelihood(BEL)method blocks the observations or their analogues,which is proven useful under some dependent data settings.In this paper,we introduce a new BEL(NBEL)method by blocking the ... Existing blockwise empirical likelihood(BEL)method blocks the observations or their analogues,which is proven useful under some dependent data settings.In this paper,we introduce a new BEL(NBEL)method by blocking the scoring functions under high dimensional cases.We study the construction of confidence regions for the parameters in spatial autoregressive models with spatial autoregressive disturbances(SARAR models)with high dimension of parameters by using the NBEL method.It is shown that the NBEL ratio statistics are asymptoticallyχ^(2)-type distributed,which are used to obtain the NBEL based confidence regions for the parameters in SARAR models.A simulation study is conducted to compare the performances of the NBEL and the usual EL methods. 展开更多
关键词 SARAR model Empirical likelihood Confidence region High-dimensional statistical inference
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A Class of Smoothing-regularization Methods to Mathematical Programs with Vanishing Constraints
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作者 HU Qingjie MA Lili CHEN Yu 《数学进展》 CSCD 北大核心 2024年第5期953-973,共21页
this paper,we propose a class of smoothing-regularization methods for solving the mathematical programming with vanishing constraints.These methods include the smoothing-regularization method proposed by Kanzow et al.... this paper,we propose a class of smoothing-regularization methods for solving the mathematical programming with vanishing constraints.These methods include the smoothing-regularization method proposed by Kanzow et al.in[Comput.Optim.Appl.,2013,55(3):733-767]as a special case.Under the weaker conditions than the ones that have been used by Kanzow et al.in 2013,we prove that the Mangasarian-Fromovitz constraint qualification holds at the feasible points of smoothing-regularization problem.We also analyze that the convergence behavior of the proposed smoothing-regularization method under mild conditions,i.e.,any accumulation point of the stationary point sequence for the smoothing-regularization problem is a strong stationary point.Finally,numerical experiments are given to show the efficiency of the proposed methods. 展开更多
关键词 mathematical programs with vanishing constraints smoothing-regularization method VC-MFCQ strong stationary point
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