共查询到19条相似文献,搜索用时 46 毫秒
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讨论了非凸无限维规划的弱有效解.其结果主要如下:广义次类凸与近次类凸条件下的Gordan择一定理;广义弱鞍点定理与Lagrange对偶;几种解之间的关系;弱有效解的必要条件与充分条件。 相似文献
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讨论几类广义锥凸映射的关系和性质,研究它们的Gordan-Farkas型定理,给出它们在无穷维空间向量最优化问题中的应用,得到强Lagrange对偶等结果 相似文献
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本文对满足弱半光滑或正则条件的局部Lipschitz函数给出了一种非单调Bundle型算法。该算法允许迭代点列对应的函数值序列是非单调下降的。 相似文献
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非奇异H-矩阵判定的新条件 总被引:4,自引:2,他引:2
非奇异H-矩阵是数值分析、矩阵理论、控制论、经济数学等许多领域中有着广泛应用的重要矩阵类,但在实用中要判别H-矩阵是十分困难的。本文研究了非奇异H-矩阵的判定问题,给出了几个新的判定条件,改进了近期的相关结果,并用数值例子说明了结果判定范围的更加广泛性。 相似文献
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记δ和α分别表示图G的最小度和独立数,1991年Faudree等人得到图G不相邻的任意2点x,y均有|N(x)∪N(y)|≥n-δ的Hamiltonian结果。1993年美国乔治亚州立大学的陈冠涛教授深化Fan条件并且得到满足1≤|N (x)∩N(y)|≤α-1的不相邻的任2点x,y均有max{d(x),d(y)}≥n/2的Hamiltonian结果。进一步改进Faudree等人的条件和综合陈冠涛教授的思路,研究满足1≤|N(x)∩N(y)|≤α-1的不相邻的任2点x,y均有|N(x)∪N(y)|≥ 相似文献
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Seth Lloyd 《Journal of Modern Optics》2013,60(12):2503-2520
Abstract Necessary and sufficient conditions are given for a quantummechanical system to possess a coordinate system with respect to which its behaviour at discrete times is that of a universal digital computer. The form of the diagonal representation for the unitary time evolution operator for quantum universal computers is derived; aspects of the transformation between the diagonal representation and the computational representation are shown to be uncomputable. A quantum-mechanical treatment of macroscopic, dissipative computers is given. 相似文献
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Don T. Phillips 《IIE Transactions》1974,6(2):114-119
In recent years, the quantitative analysis of engineering design problems has been greatly influenced by the development of Geometric Programming. This technique is particularly effective in dealing with nonlinear design problems subject to nonlinear constraints. Inherent in any design analysis is the accurate determination of the technological coefficients involved in the problem formulation. This paper addresses itself to the problem of “fuzzy” data, and presents a technique based on Geometric Programming to perform nonlinear sensitivity analysis. An example problem is formulated and solved to illustrate the computational procedure. 相似文献
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《Journal of Modern Optics》2013,60(7):905-915
A thin phase structure is rendered visible when the optical image-forming system produces interference between the direct light and the diffracted light. The condition required to relate explicitly some uniquely identifiable terms of the coherent transfer function of the optical system with the image irradiance variations associated with the interference terms is derived. This treatment is employed firstly to establish the necessary and sufficient conditions for rendering visible a thin phase structure, and secondly to define a unique effective transfer function to map the object's thin phase structure into image irradiance terms. Thus, thin phase imagery is represented by a linear filtering process as previously suggested by Menzel. Finally, the equivalence between Menzel's phase contrast function and the effective transfer function is indicated, as well as the advantages of employing the present symmetry-based approach. 相似文献