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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
An extremal set theoretical characterization of some steiner systems
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The results contain many old theorems of extremal set theory as particular cases (Sperner.
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Here we present a further generalization and demonstrate that it shares with its predecessors the usefullness for uniqueness proofs in extremal set theory.
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Extremal Set Systems with Weakly Restricted Intersections
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These conditions are used to characterize when a givenR is a best uniform complex rational approximant off in the special case where the extremal set off-R contains exactly max {n+degp,m+degq}+2 points.
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On the extremal sets of extremal quasiconformal mappings
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The properties of the extremal sets of extremal quasiconformal mappings are discussed.
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We prove that, for fixed k and sufficiently large n >amp;gt; n0(k) , the extremal sets are essentially sections of lattices, bounded by edges parallel to the k directions and of equal length.
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Moreover, a general existence theorem is established and a result concerning the existence of extremal sets with respect to packing and covering densities is proved.
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The minimum boundary length density of a lattice-periodic set with given period lattice and area density is determined, together with the extremal sets, and a conjecture on the higher-dimensional analogue is made.
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| | The structural theorem of extremal subsets of a closed convex set is given. The closed relation of extremal supporting and extremal sets is given by using affine set supporting. Also an approach on the existence problem of exposed points in many subsets is presented. So, the well-known extreme point theory due to Krein-Milman has been supplied. | | 给出闭凸集的端子集结构性定理 .用仿射集支承揭示了端支承仿射集与端集的密切关系 .又探讨了曝点存在性问题 .从面对Krein -Milman关于端点的理论补充了新的内容 | | 文摘来源 | | In this paper, a lumped RLC interconnect tree for gate output is modeled with a simple circuit segment, and the gate load delay is then calculated. Through the representation of the lumped RLC interconnect tree in binary tree structure, the driving point admittance moment may be rapidly obtained, and the parameters R 1, L 1, C 1 and C 2 in the Π model are deduced, then the gate load delay is obtained from ramp response. The simulation result is within 3% deviation from the one obtained with Spice, so th... | | 利用一段简单的电路模型对门输出端的集总RLC互连树建模并计算门负载延迟 采用二叉树的数据结构表示集总RLC互连树 ,从而快速计算互连树入端导纳的分量 ,进一步导出Π RLC模型中的R1,L1,C1和C2 参数 ,计算出斜坡输入时的门负载延迟 实验证明 ,应用文中模型计算出的门负载延迟与Spice延迟偏差不超过 3% ,因此该模型适合设计验证中门延迟的近似计算 | | 文摘来源 | | The viability of a differential inclusion on a region with nonsmooth boundary is studied.Based on nonsmooth analysis theory,the viability criterion is verified under the condition that the set-valued mapping in the right hand side is a polytope and the boundary function of the region is subdifferentiable and its subdifferential is a convex hull of finitely many points.This verification can be implemented by determining the consistency of a group of linear inequalities,or equivalently,by solving a linear pro... | | 讨论微分包含关于非光滑区域生存性的判别问题.当右端集值映射为多面体,边界为次可微函数,且次微分为有限点集凸包时,基于非光滑分析理论,给出了在一点处检验生存性条件是否成立的方法.该方法将生存性判别转化为判别线性不等式组的相容性或等价地转化为求解一个线性规划问题.最后讨论了次可微函数上图的生存性问题. | | 文摘来源 | |   | | << 更多相关文摘 |
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