共查询到20条相似文献,搜索用时 109 毫秒
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本对基于决策风险态度的区间数多指标方法的映射函数的可区分性、理想点的存在性进行了论证,确保了区间数多指标决策方法的正确性,并对决策风险态度因子进行随机化,使此方法更合理,更有深度。 相似文献
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本文讨论多比例延迟微分方程的散逸性,给出了多比例延迟微分方程是散逸的充分条件,它可视为文献[8]中相应结果的推广。 相似文献
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多目标半定规划的互补弱鞍点和G-鞍点最优性条件 总被引:1,自引:0,他引:1
对于含矩阵函数半定约束和多个目标函数的多目标半定规划问题,给出Lagrange函数在弱有效意义下的互补弱鞍点和Geofrrion恰当有效意义下的G-鞍点的定义及其等价定义.然后,在较弱的凸性条件下,利用含矩阵和向量约束的择一性定理,建立多目标半定规划的互补弱鞍点和G-鞍点充分必要条件. 相似文献
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多总体球性检验的似然比准则的非零渐近分布龚力强(华南建设学院西院广州510405)关键词:多总体球性;似然比检验;渐近分布AMS(1991)主日分类:62E20.设x。1,x。。,…,x;《1=1,2,…,z;N;>户)为从卢维正态总体Np(8,工)... 相似文献
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本文讨论了 Banach空间中 Sturm-Liouville问题正解的存在性与多解性,通过线性算子的谱半径,给出其正解存在与多解的条件. 相似文献
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椭圆边值系统的正径向解的存在性与多解性 总被引:2,自引:0,他引:2
通过利用锥拉伸及锥压缩型的Krasnosel‘skii不动点定理,我们研究了一类椭圆边值系统的正径向解的存在性,非存在性与多解性。 相似文献
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本文在LF拓扑空间中建立了L-fuzzy集网的弱收敛(R-收敛)概念,应用文[4]中的R-闭包,系统讨论了它们的性质,证明了等式RlimA_n=∧(∨A_m)_R和RlimA_n=A_n=∧(∨A_m)_R并且给出了L-fuzzy集网与其子网之间的关系。 相似文献
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A class of third-order convergence methods of solving roots for non-linear equation,which are variant Newton's method,are given.Their convergence properties are proved.They are at least third order convergence near simple root and one order convergence near multiple roots.In the end,numerical tests are given and compared with other known Newton's methods.The results show that the proposed methods have some more advantages than others.They enrich the methods to find the roots of non-linear equations and they are important in both theory and application. 相似文献
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Stability of oscillatory solutions of differential equations with general piecewise constant arguments of mixed type 下载免费PDF全文
We examine scalar differential equations with general piecewise constant arguments of mixed type, in short DEPCAG of mixed type, that is, the arguments are general step functions. Criteria of existence of the oscillatory and nonoscillatory solutions of such equations are proposed. Necessary and sufficient conditions for stability of the zero solution are obtained. Our results are new, extend and improve earlier publications. Several numerical examples and simulations are also given to show the feasibility of our results. 相似文献
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Jun-ling Ma Ke-fa Wu 《应用数学学报(英文版)》2006,22(1):33-42
A kind of partially linear errors-in-variables models with replicated net points of observation are studied in this paper. Estimators of unknown parameters are given. Under certain regular conditions, it is shown that the estimators of the unknown parameters are strongly consistent and their a.s. convergence rates are achieved. 相似文献
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This paper mainly studies the dynamic properties of the forest beetle outbreak model. The existence of the positive equilibrium point and the local stability of the positive equilibrium point of the system are analyzed, and the relevant conclusions are drawn. After that, the existence of Turing instability, Hopf bifurcation and Turing-Hopf bifurcation are discussed respectively, and the necessary conditions for existence are given. Finally, the normal form of the Turing-Hopf point is calculated, and some dynamic properties at the point are analyzed by numerical simulation. 相似文献
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给出了随机变量 X1,X2 ,X3 ,X4 每三个相互独立 ,但 X1±X2 与 X3 ± X4 不相互独立的例子 ,以及 X1,X2 ,X3 每两个相互独立 ,但 X1± X2 与 X3 不相互独立的例子 . 相似文献
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The aim of this paper is to establish the uniform convergence of the densities of a sequence of random variables, which are functionals of an underlying Gaussian process, to a normal density. Precise estimates for the uniform distance are derived by using the techniques of Malliavin calculus, combined with Stein?s method for normal approximation. We need to assume some non-degeneracy conditions. First, the study is focused on random variables in a fixed Wiener chaos, and later, the results are extended to the uniform convergence of the derivatives of the densities and to the case of random vectors in some fixed chaos, which are uniformly non-degenerate in the sense of Malliavin calculus. Explicit upper bounds for the uniform norm are obtained for random variables in the second Wiener chaos, and an application to the convergence of densities of the least square estimator for the drift parameter in Ornstein–Uhlenbeck processes is discussed. 相似文献
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Banach空间的型与独立Banach空间值随机变量序列的不等式 总被引:3,自引:0,他引:3
本文建立了独立B值随机变量序列部分和的极大值函数S*与p方根函数S(p,X)的分布函数不等式与矩不等式,讨论了这些不等式的成立与Banach空间的p型与q余型的关系,同时给出了与Hilbert空间同构的Banach空间的特征。 相似文献