扰动

The question on bifurcation of limit cycles in quadratic conservative perturbations of a quadratic integrable system is discussed.

研究了一个具有同宿轨的二次可积系统在二次保守扰动下的分支现象。

To avoid this, a robustness index is proposed as a replacement for the gain margin. Optimal controller design is the achievable by minimizing a designated error integral criterion for a load disturbance subject to inequality constraints on phase margin and the new robustness index.

因此，本文提出一强韧性指标来取代传统的增益边距，最佳强健控制器即可在相位边距和此指标的不等式限制下，透过将负载扰动产生之特定误差积分最小化来取得。

How to keep switch's balance without interference,We utilize function of DCS fully to accomplish the function through programming.

如何在控制方案上实现平衡无扰动切换，充分利用DCS组态软件的功能，进行编程实现该功能。

The number of intersection points of l : ax + by + c = 0 and the centroid curve L :{(x|ˉ,| h ∈∑} gives the number of zeros of I.

在第四章中，考虑到系统在二次多项式扰动下的几何意义：若I=∫ integral from n=intrdxdy，那么直线l：ax+by+c=0与质心曲线L∶{

Based on the equivalent-two-machine-two-area AC/DC parallel system, a time optimal control plan for a second-order oscillation system is developed and a TOC strategy for quickly suppressing interzone disturbance is proposed.

为了快速平息交直流互联电网的区间扰动振荡，基于等值两机两区域系统推导了2阶振荡系统的时间最优紧急直流功率支援控制策略。

When you kiss young girl that exquisite small mouth, when disturbs that warm tip of tongue, you confusedly in that kind of intoxicant breath; When you caress young girl that enchanting breast, you will sigh skillful heaven divine creative force; When your penis when young girl that holds reluctantly in your vagina back and forth twitches, you will feel that one kind of very solid feeling, you will feel young girl's vagina closely will be bundling you, will want you to fall for her, pays for her, you will feel that will be the life wonderful time at this moment, you may pay all for her!

当你吻少女那精巧的小嘴，扰动那温暖的舌尖时，你会迷茫于那种醉人的气息；当你爱抚少女那迷人的乳房时，你会感叹上天造物之巧；当你的阴茎在少女那勉强容纳你的阴道中来回抽动时，你会感到一种很实在的感觉，你会感到少女的阴道紧紧地捆着你，要你为她而倾倒、为她而付出，你会感到此时此刻是人生美妙的时刻，你可以为她付出一切！

The method is a com- bination of the theory of normally hyperbolic invariant manifolds and an appropriate continuation method.

我们将在第四章利用法向双曲不变流形理论和Kopell，Chicone的延拓方法，来证明2个自由度的非哈密顿扰动系统的2维共振不变环面的存在性定理。

For the integrable Hamilton systems, the Invariant tori can be continuation in a certain range if the perturbation of the coupled systems is small enough.

对可积分的Hamilton系统，加上足够小的扰动，系统的不变环面所代表的规则运动在一定范围内都是可延拓的。

In this paper, we focuse on the perturbation properties of W-weighted Drazin inverse, which is the weighted form of Drazin inverse.

本文主要讨论了 Drazin 逆的加权形式——加 W 权的 Drazin 逆的扰动性质。

Chapter 5 deals with the solvable theorem of adaptive inverse optimal control problems for a class of stochastic nonlinear systems driven by Wiener noises of unknown covariance. The systems are depicted by It〓 stochastic differential equations. By using an adaptive backstepping algorithm and stochastic control Lyapunov functions, the designing procedure of control laws of global asymptotic stability in probability and adaptive inverse optimal stabilization in probability are presented systematically. Adaptive control laws and parameter update laws can be obtained at the same time by this design scheme.

在第5章中，针对具有方差不确定Wiener噪声扰动和未知定常参数的随机非线性系统（假设方差的F—范数是一个常数或一个缓慢变化的量，对其进行在线辨识），给出并证明了自适应逆最优控制问题可解定理，基于随机Lyapunov定理和It〓微分规则，采用自适应Backstepping设计方法，系统地设计了全局依概率渐近稳定和自适应逆最优控制策略，这种设计方法可同时获得控制策略和自适应律，计算机数值仿真结果表明该控制算法是有效性的。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。