1) invariant set
不变集
1.
The Hansdorff dimension of the invariant set determined by the nonlinear contraction map;
非线性压缩生成的不变集的Hausdorff维数
2.
On quadratic system in plane with invariant set;
具不变集的平面二次系统
2) Invariant sets
不变集
1.
Invariance principle and state feedback stabilization of invariant sets of switched systems;
切换系统的不变性原理与不变集的状态反馈镇定
2.
Output feedback stabilization of invariant sets for switched systems
切换系统不变集的输出反馈镇定
3.
In this paper it is proved that the invariant sets of the expansive flows with the shadowing property show the continuity with perturbation and the weakly invariant sets of C 0 flows have the generic property of continuous change with perturbation.
证明紧致流形上具有跟踪性的可扩流的不变集随扰动的连续性及 C0 流的弱不变集随扰动而连续变化的通有
3) invex set
不变凸集
1.
To improve research on the generalized convex function,some new characteristics of the prequasi-invex function are figured out by means of the cographical set of function(E(f)=(x,α)∶x∈K,α∈R,f(x)αH)and η-invex set,and its two applications in the mathematical programming problem are proposed.
借助于η-不变凸集和函数的上图(E(f)={(x,α)∶x∈K,α∈R,f(x)≤α})得到了预不变拟凸函数的几个新的性质,然后还给出了预不变拟凸函数在数学规划问题中的两个重要应用,从而完善了对此类广义凸函数的研究。
2.
Minty(strong) weak vector variational-like inequality and Stampacchia(strong) weak vector variational-like inequality had the same solution in the case that a matrix-valued function defined on invex set was a continuous invariant pseudomonotone mapping.
讨论两类向量似变分不等式解的关系问题,指出当定义在不变凸集上的映射是不变伪单调连续时,Minty(强)弱向量似变分不等式的解和Stampacchia(强)弱向量似变分不等式的解相同。
3.
To improve research on the generalized convex function,some new characteristics of the prequasi-invex function are figured out by means of the cographical set of function(E(f)={(x,α):x∈K,α∈R,f(x)≤α})and-invex set,and its two applications in the mathematical programming problem are proposed.
首先给出例子说明了此类广义凸函数的存在性,然后利用强η-不变凸集和函数的上图(E(f)={(x,α):x∈K,α∈R,f(x)≤α})得到了强预不变凸函数的几个重要性质,并用另一方法给出它的一个判别定理的简化证明,最后还给出了强预不变凸函数在数学规划问题中的一个重要应用,从而完善了对此类广义凸函数的研究。
4) invariant sets
不变集合
1.
The scheme also makes use of logic rules and invariant sets,the decentralized control laws which respect the rules are guaranteed feasibility and free-collision formation.
使用不变集合方法和强制协同的逻辑规则保证了在飞行中UAV之间的碰撞避免。
2.
By using potential well family method,we study the invariant sets and vacuum isolating behaviour of solutions to a class of nonlinear wave equations.
应用位势井族方法,研究了一类非线性波动方程的不变集合与解的真空隔离,证明了当初始能量小于位势井深度时,此问题存在不变集合与解的真空隔离现象。
5) positive invariant set
正不变集
1.
A sufficient condition of the existence of a positive invariant set in the differential equation on Banach space is given,which improves a theorem of Mitio Nagumo.
给出了 Banach 空间上的微分方程存在正不变集的一个充分条件,从而改进了南云道夫的定
2.
In this paper,the problem of global dynamics of second order Hopfield neural networks with time delays was investigated based on the relation between the positive invariant set,attracting set and the system stability,and on the properties of nonnegative matrices and the techniques of differential inequalities.
通过正不变集、吸引集与系统稳定性的关系,并利用非负矩阵的性质和微分不等式的技巧,对具有时滞的二阶Hopfield神经网络全局动力性进行研究。
6) invariant subset
不变子集
1.
In this paper, by using some results of Shannon’s theory of secrecy systems, we divide the message space and cryptogram space into some invariant subsets, and then compute the mutual information between messages and cryptograms.
本文利用Shannon有关保密系统的理论,对RSA体制中的明文、密文进行了不变子集的划分,从而可以计算出明文和密文的互信息,同样得到了选择安全素数作为RSA的参数的理论依据。
补充资料:不变集
不变集
invariant set
不变集防对趾妇成对:一。a冲“.,oe M.o袱ecT.0],动力系统f(P,t)的相空间R的 由完整的轨道的并形成的集合M,即适合条件 f(M,t)=M,t〔R的集合M,这里f(M,0是M在相应于一已给的:的变换p~f(p,t)下的象. 不变集M作为度量空间R中的集合,可以具有确定的拓扑构造;例如,它可以是一拓扑流形或光滑流形,一个曲面,一条闭Jo司an曲线,或一孤立点.从而可以说不变集M是一不变流形(in份血nirr以川.士b】d),一不变曲面(加珑币axlts也企ce),一不变曲线(in磷币ant clll、吧)或一不变点伽珑币即t point). 不变点常称为动力系统的平稳点(statio朋习point),因为在此点上运动转化为静止:即对一切t有f(p,t)=p不包含动力系统的任意不变点的闭不变曲线恒由周期运动的轨道构成,即对一切作R与某个T>0均满足条件 f(p,t+T)可(p,t)的运动.因此,它称为周期轨道(讲改月沁咧戊加ry).可以成为不变流形的例子是球面、环面、圆盘,不变曲面可以是锥面、M6b油带,带柄的球面;不变集则可以是所有平稳点的集合,运动f(p,t)的所有田极限点的集合。,和所有:极限点的集合人,还有所有游荡点(~由而呜Point)的集合甲和所有非游荡点(~讹切d面飞po加t)的集合R\砰. 平面上的动力系统 dx,,、dy 万二,二二了气x,y),一货罗=9 Lx,y)(l) dt了、‘一’2产’dr,、”J少、1,的不变点按轨道在其邻域内的动态的性质分属四种类型,即结点(n团心)、焦点(狡尤谓)、鞍点(阳改既)和中心(centi℃)(见图).结点和焦点可以是渐近稳定或渐近不稳定的,鞍点是不稳定的,而中心是稳定的(见渐近稳定解(韶娜叩加石.cally~stableso】ution)).结点、中心和焦点的Poirlcar已指标为+L鞍点的则为一1. 若(l)的右方在平稳点x”x。,夕=y0处的妇cobi矩来牟命龄 图a图b图c图d阵 ;了_、.、_{卫架且黑俨工{ J气x,y)“{。,、。护、{ }旦纽CL卫工刀夕(x,夕){ L口‘ay」的本征值又t,又2有非零实部,若兄、和又:均为实且有同号,则不变点是结点;若又‘和又2均为实但为异号则为鞍点;若又.和几2为共扼复数,则为焦点. 在这些情况下,系统(l)的奇点的类型与将(l)的右方展为x=x。,y二y。
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