查询词典 birational invariant

Several sufficient conditions for judgement of the invariant set and the attraction for the equations are obtained by using the properties of nonnegative matrices and some analytical methods.

对一类大型非线性偏泛函微分方程的渐近行为进行研究，利用非负矩阵性质和适当的分析技巧，建立了判断其不变集和吸引性的充分条件。

Uncertain time-delay systems ; invariant ellipsoid set ; model predictive control ; stability

不确定时滞系统；不变椭圆集；预测控制；稳定性

Dual mode predictive control method is proposed for reducing on-line burden. The proposed method applies the ellipsoid invariant set to the terminal set.

该方法将时滞系统的不变椭圆集应用于预测控制的终端约束集，保证了输入受限系统的可行性和稳定性。

In 1984, Sun Jingxian put forward the conception of invariant set of descending folw in his doctor degree thesis, which gave an another methods to determine a critical value.

这些定理给出了确定临界值的一个基本手段。1984年，孙经先在他的博士论文中提出了下降流不变集的概念，给出了确定临界值的另一手段。

Based on this notion and the invariance principle, a condition is proposed and proved, under which an invariant set of states of a switched system with Lyapunov stable subsystems can be stabilized by state feedback.

基于这个不变性原理以及输入对系统能量函数稳定的概念，利用多Lyapunov函数方法提出并证明了一类具有Lyapunov稳定子系统的切换系统的不变集可状态反馈镇定的条件。

When the predictive states are in invariant ellipsoid set, the off-line state-feedback law is adopted. Thus, computational burden is reduced.

最后将时滞系统的滑模面作为预测控制的不变集，扩大了终端约束集，有效缩短了预测时域。

In the framework of Filippov solutions and on the basis of Lipschitz continuous and regular scalar Lyapunov functions, this dissertation discusses the stability problems of nonlinear systems with discontinuous right-hand sides with respect to a given point or a closed invariant set, and have some related results.

本论文在Filippov解的意义下，基于Lipschitz连续且正则的标量Lyapunov函数，讨论了右端不连续的非线性系统相对一个给定的点或相对于闭不变集的稳定性问题。

We discussed the positive invariant set,the exsistence and the stability of the equilibrium by the stability theory of ordinary differential equation and the conditions for the global asymptotic stability of the disease-free equilibrium and the endemic equilibrium are obtained.

本文讨论了模型的正不变集，运用微分方程稳定性理论分析了模型平衡点的存在性及稳定性，得出了疾病消除平衡点和地方病平衡点的全局渐进稳定的充分条件。

When predictive state is out of invariant set, using dual mode control structure, the extra variable on the fixed state-feedback law is introduced for feasible input.

当预测状态在不变集之外时，采用双模控制结构，在固定的控制律上引入额外变量保证了输入可行性。

In the following, this dissertation does some research works about the other system—HDS with uncertainties of polytope using the existent methods, and proves that the system is exponential stable with respect to its invariant set under some conditions making use of Lyapunov function.

然后，本文针对另一类具体的混合动态系统——具有多面体不确定性的混合动态系统，沿用已有的稳定性分析方法对其模型进行分析，最终借助Lyapunov函数证明了在一定的条件下系统关于其不变集是指数稳定的。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48