搜索结果: 226-240 共查到“知识库 函数论”相关记录1419条 . 查询时间(0.564 秒)
Characteristic Set Algorithms for Equation Solving in Finite Fields and Applications in Cryptanalysis
Characteristic set finite field proper triangular set regular triangular set Boolean function stream cipher
2013/9/9
Efficient characteristic set methods for computing solutions of polynomial equation systems in a finite field are proposed. The concept of proper triangular sets is introduced and an explicit formula ...
E±cient Algorithm for Time-optimal Feedrate Planning and Smoothing with Conˉned Chord Error and Acceleration
Time-optimal feedrate planning chord error conˉned acceleration discrete velocity searching feedrate smoothing
2013/9/9
In this paper, an e±cient algorithm is proposed to generate a smooth near-timeoptimal feedrate function along a parametric tool path for 3-axis CNC machining under a feedrate bound, an acceleration bo...
基于经验模态分解的上证综合指数时间序列分析
经验模态分解 内模函数 金融时间序列
2012/12/10
采用经验模态分解(empirical mode decomposition, EMD)方法对上证综合指数(Shanghai composite index, SCI)进行研究，将其分解为多个内模函数(intrinsic mode functions, IMFs)和剩余项之和.通过对各阶内模函数进行基本统计分析和分布拟合，发现其“尖峰厚尾”的特点基本服从自由度为3的t分布.通过对各阶内模函数进行周期...
Sylvester型泛函的极值问题
Sylvester型泛函 影子系统 Orlicz质心体
2012/12/10
给出一种新的Sylvester型泛函A(K)的定义.运用影子系统,研究A(K)的极值问题.当K为椭球时，A(K)取得最小值.在平面上,当K为三角形时，A(K)取得最大值.对称情形的极值凸体为平行四边形.
一个新的简单精确光滑罚函数
非线性规划 约束极小化问题 局部解 精确罚函数
2012/12/10
针对一般约束优化问题，通过添加一个变量，给出一个新的简单精确光滑罚函数.在较弱的约束品性的条件下，证明所给出的罚函数具有一定的连续可微性，而且当罚参数充分大时，所给出的罚问题的局部极小点为原问题的局部极小点.
广义逆函数值Padé逼近行列式的一个新算法
广义逆 函数值Padé 逼近 Arnoldi方法 反对称方程组 Schur补
2012/12/10
应用Arnoldi方法求解系数为反对称矩阵的线性方程组，给出广义逆函数值Padé逼近行列式公式的一种新的计算方法，并由此提供计算型为［n/2k］f(x,λ)的广义逆函数值Padé逼近的几个算法.通过实例说明方法的有效性.
平面上凸曲线组合流
曲率流C&infin 范数凸曲线 撑函数
2013/12/4
主要研究了两种新的平面凸曲率流: 一种是由保面积流和保长度流组合而成, 这种曲率流在演化过程中缩短了曲线的周长, 增大了曲线所围成的面积; 另一种是两种保长度流的“凸组合”, 这种曲率流的周长是常数, 而面积不断增大. 两种曲率流都具有全局存在性, 并且当时间趋于无穷大时, 曲线在C∞范数下收敛到有限圆.
Fejer-Riesz factorizations and the structure of bivariate polynomials orthogonal on the bi-circle
Fejer-Riesz factorizations the structure of bivariate polynomials orthogonal the bi-circle Complex Variables
2012/6/29
We give a complete characterization of the positive trigonometric polynomials Q(\theta,\phi) on the bi-circle, which can be factored as Q(\theta,\phi)=|p(e^{i\theta},e^{i\phi})|^2 where p(z,w) is a po...
The order of a linearly invariant familiy in C^n
Schwarzian derivative homeomorphic extension ball univalence convexity Bergman metric weakly linearly convex projective dual space
2012/6/19
We study the (trace) norm of a linearly invariant family in the ball in $\C$. By adapting an approach that in one variable yields optimal results, we are able to derive an upper bound for the norm of ...
A new generalization of generalized hypergeometric functions
generalized hypergeometric functions Complex Variables
2012/6/15
In this paper a natural generalization of the familiar H -function of Fox namely the I -function is proposed. Convergence conditions, various series representations, elementary properties and special ...
On removability properties of $ψ$-uniform domains in Banach spaces
Uniform domain uniform domain removability property quasihyperbolic metric
2012/6/9
Suppose that $E$ and $E'$ denote real Banach spaces with the same dimension at least 2. The main aim of this paper is to show that a domain $D$ in $E$ is a $\psi$-uniform domain if and only if $D\back...
涉及微分多项式及例外函数的正规定则
全纯函数 微分多项式 正规
2014/1/10
证明了如下的结论: 设\,$k\geqslant 2$\,是一个正整数, $\mathcal{F}$\,是区域\,$D$\,上的一族全纯函数, 其中每个函数的零点重级至少是\,$k$, $h(z),\,a_1(z),\,a_2(z)\,\cdots,\,a_k(z)$\,是\,$D$\,上的不恒为零的全纯函数. 假设下面的两个条件也成立:\,$\forall f\in\mathcal{F},$ (...
基于局部移动Kriging无网格方法的层合板自由振动分析
无网格法 层合板 局部Kriging插值 自由振动
2014/5/16
利用基于局部移动Kriging插值无网格法对层合板自由振动进行了数值分析,基于一阶剪切层合理论导出了层合板振动的控制方程和边界条件,进一步得到了自由振动的离散化特征方程。由于Kriging插值函数具有Kronecker delta函数性质,可以直接施加本质边界条件。通过本文给出的方法,对不同边界条件、不同跨厚比、不同材料参数和铺设角度的层合板的振动频率进行了计算,均得到满意结果。最后用该方法对层合...
On some extremal problems in certain harmonic function spaces of several variables related to mixed norm spaces
Distance estimates harmonic function unit ball Bergman spaces
2012/5/9
We provide some new estimates for distances in harmonic function spaces of several variables related to mixed norm spaces.Some of them extend previously known assertions in this direction in the unit ...
Non-holomorphic projections and extension of biholomorphic mappings
Non-holomorphic projections extension of biholomorphic mappings Complex Variables
2012/5/24
We show that biholomorphic mappings between two bounded, pseudoconvex domains with smooth boundary extend smoothly to the boundaries of the domains, under a regularity condition on a family of twisted...