查询词典 neighborhood system

Therefore, the robust feedback linearization control is obtained.(2) For affine nonlinear systems with parameter uncertainties, a novel nonlinear state observer is constructed. Under nonlinear feedback control based on observed state, the regulated system state is guaranteed to enter and remain in a enough small neighborhood of origin.

对仿射非线性系统，考虑其参数的不确定性，设计了一种新型的非线性状态观测器，通过调节观测器和控制器的参数，可使系统在基于观测状态的控制下，调节状态到原点的一个足够小表示领域内。

With respect to syntax, the roles of tagmeme in the structure of word and sentence and Chomsky's Generative-Transformational Grammar are discussed. The spatial relation theory and existing research achievements are investigated. Having noticed the shortage of the capability of topological and metrical relation in the description of spatial information structure, the author proposes Combinational Qualitative Geometry based on the two invariables under ordinary transformations, distance ratio and direction difference, the CQG-based spatial relation system between topological and metrical constraint is thus constructed, on which several spatial relations such as parallel, perpendicularity, co-linearity, sequence and direct neighborhood are derived. Based on extended theory of spatial relation, the language anamorphosis is analyzed from the aspects of phonetics, semantics and syntax. The mere geometric and formalized spatial relation is then integrated with concrete geographic ontology to accommodate richer and indicative spatial configuration of spatial information in the different geographic context. Finally a syntax framework for spatial information is put forward.

在语法结构方面，首先阐述了法位和法素在语法结构词法和句法中的地位和作用，以及Chomsky生成转换语法的核心内容；详细介绍了地理信息系统空间关系理论及现有的研究成果；在分析现有的拓扑关系和量度关系对空间信息结构描述能力不足的基础上，提出了基于长度比和角度差两个不变量的组合定性几何，以此建立了介于拓扑及量度约束之间的组合定性关系体系，并以此为基础派生出平行、垂直、共线、次序、直接邻近等空间关系描述；本文基于扩展的空间关系理论，详细讨论了空间关系在语音、语法和语义三个方面的语言变体，将纯几何和纯形式化的空间关系与具体的地理本体结合起来，可以获得更为丰富的、更能反映空间关系在不同语言上下文中具体体现的组合关系；最后给出了一个空间信息的语法结构的基本框架。

By choosing suitable design parameters, all the signals in the resulting closed-loop system are uniformly bounded and the norm of the tracking error vector converges to an arbitrarily small neighborhood around zero by using the presented control approach.

通过选择适当的设计参数，提出的控制方法使得闭环系统的所有信号是一致有界的和跟踪误差向量的范数收敛到小的零邻域内。

By using the sliding mode approach and a multi-step control strategy, a new controller is presented, which can not only satisfy the control constraints but also stabilize the system to an arbitrarily small ε-neighborhood about its equilibrium in a finite time.

利用滑动模态的思想和多步控制策略，设计了不连续反馈镇定律，该镇定律一方面满足控制受限条件，另一方面使得闭环系统的状态收敛到预先给定的原点的任意小的ε邻域中。

With the new concept,the problem of variable structure control of 2D discrete system is transferred to the problem of seeking a sliding model with good sporting character and attractability. The concrete design schemes of the imitative sliding model and variable structure controller are also put forward. And the concrete expression of the time T in ε-neighborhood of reaching switch manifold is obtained. The difficulty of applying the existing methods to MIMO systems is overcome.

在新概念之下，将2D离散系统的变结构控制问题转化为寻找一个既具有良好的运动品质又具有吸引性的滑动模问题，给出了滑动模及变结构控制器的设计方案，并且获得了达到切换流形的ε领域的时间T的具体表达式，克服了已有方法难以应用到多输入—多输出系统上的困难。

In addition we establish a new moving coordinate system in the neighborhood of the wave front and obtain a revised eikonal equation describing the curvature effect of waves in the usual orthogonal coordinate system.

由此我们获得了二维和三维情形下靶型波的具体形式。对三维涡卷波和V-形波，我们也给出了它们的具体形式。在第四章，我们应用摄动方法，较简捷地获得了组织中心沿径向和轴向的运动规律。

The integrability conditions and coefficient conditions for the appearance of 5 and 6 limit cycles from the neighborhood of the equator are obtained. An example of cubic system with 6 limit cycles bifurcating from the equator is given for the first time.

同时计算出系统的前6个赤道环量，得到了系统在赤道邻域的可积性条件及在赤道附近分支出5个和6个极限环的系数条件，从而首次给出了一个平面三次系统在赤道附近分支出6个极限环的计算实例。

The proposed method can simplify the structure of the system and eliminate the chattering phenomenon.Moreover,the convergence neighborhood of the system states can be estimated according to the parameters of the controller and the range of the mismatched uncertainties.

所提方法可以简化系统结构，消除控制抖振，通过控制器参数和非匹配扰动的上界可以估计系统状态的收敛范围。

At first, we give the more precisely expression of the system in some sufficiently small neighborhood of the saddle point under some suitable transformation, and use the foundational solutions of the linear variational equation of the unperturbed system along the homoclinic or heteroclinic orbits as the demanded local coordinate system.

首先，我们在鞍点的充分小邻域内给出系统在适当的变换下的更加精确的表达形式，利用未扰系统沿同宿，异宿环的线性变分方程的基本解组作为系统在同宿，异宿环的小管状邻域内的新的局部坐标系。

The method is to choose the structure and parameter of fuzzy logic control system properly, so as to make the controller's output equal to the value determined by prior experience absolutely or approximatively, which can make the system output exist in a tiny neighborhood of the given value.

其基本思想是：合理确定模型逻辑控制系统的结构和参数，使系统处于稳态时控制器的输出等于或近似等于某个先验知识确定的值，该值能将系统输出维持在设定值的一个微小领域内。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。