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 δ算子
 “δ－算子”译为未确定词的双语例句
 Controllability and Stabilizability of Linear Time-Invariant Systems in the Delta Operator Descriptions 线性定常系统的δ－算子描述──能控性与能稳性 短句来源
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 ,Δ? ,Δ? 短句来源 L and Δ? L和Δ? 短句来源 P—C. OPERATORS P—C.算子 短句来源 Discrete Control System Using δ-operator 应用δ算子的离散时间控制系统 短句来源 Optimal Control of Networked Control System Using δ Operator δ算子下的网络控制系统最优控制方法 短句来源

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 Every binomial polynomial sequence is associated with a matrix (hereinafter called binomial matrix for short).In this paper we deal with the properties of the binomial polynomial sequences by way of the binomial matries. 每个二项式型多项式序列(简称为 B-序列),确定一个矩阵(简称为 B-矩阵).本文通过矩阵来讨论 B-序列的性质.给出了 B-序列的几个等价条件(定理1).任何两个B-序列的转移矩阵也是 B-矩阵,从而 B-矩阵构成一个群(定理2)并建立了两个 B-序列对应的δ—算子之间的关系(定理3). New concepts such as δ—pairs,δ operator,direct surn and connec- tivity of linking systems are introduced and some structural properties of linking systems are deduced.Furthermore directed linking systems are also investigated. 本文引进了联系系统的δ—对、δ算子、直和与连通性等新概念,得到了联系系统的一些结构性质。此外定义并讨论了有向联系系统。 Studies the necessary and sufficient conditions of an n--dimensional curvedsurface in an m--dimensional Riemannian space, which will keep up the meancurvatures vector or mean curvatures unchanged under the infinitesmal isom-etric variation. Following the definition of a δ-operator and its operation rulestudied, the variations of mean curvafure vectros and mean curvatures are ca-lculated under the infinitesmal isometric variation. As a result, the necessaryand sufficient conditions for keeping up the mean curvature... Studies the necessary and sufficient conditions of an n--dimensional curvedsurface in an m--dimensional Riemannian space, which will keep up the meancurvatures vector or mean curvatures unchanged under the infinitesmal isom-etric variation. Following the definition of a δ-operator and its operation rulestudied, the variations of mean curvafure vectros and mean curvatures are ca-lculated under the infinitesmal isometric variation. As a result, the necessaryand sufficient conditions for keeping up the mean curvature vectors or meancurvatures of a subspace unchanged in an ordinary Riemannian space, constantcurvature space or Euclidean space under the infinitesmal isometric variationare obtained. 研究了m维黎曼空间中的n维曲面在无穷小等距变分下保持平均曲率向量或平均曲率的充要条件。首先研究了δ算子的定义、运算规律等,接着计算了平均曲率向量及平均曲率在无穷小变分下的变差。最后得出,一般黎曼空间、常曲率空间和欧氏空间的子空间在无穷小等距变分下保持平均曲率向量或平均曲率的充要条件。 << 更多相关文摘
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