查询词典 symmetry

According to the different compensatory objects, this paper took a project which based on symmetry components to compensate. When SVC is used as the system compensatory, it is mainly used to adjust the system voltage. Therefore, the balanced control strategy is adopted. When SVC is used as the load compensatory, it is mainly used to restrain the voltage fluctuation and flash during the running of the impactive loads,so the unbalanced control strategy is adopted. According to this project, the hardware and software for the control system of SVC are designed.

本文首先分析了无功补偿的基本原理，针对SVC补偿对象的不同，采用一种基于对称分量法的SVC分相补偿方案：作为系统补偿时，SVC主要用来调节系统电压，因此采用平衡控制策略；而作为负荷补偿时，SVC主要用来抑止冲击性负荷运行时引起的电压剧烈波动和闪变，因此采用不平衡控制策略，依据此方案，对SVC控制系统的软、硬件进行设计，对控制系统的数据处理方法及控制策略也进行了详细的分析。

I want my life, the only life of which I am assured, to have symmetry or, in default of that, at least to acquire some clarity.

我希望我的生活，唯一的生活，我保证，有对称，或在预设的，至少要取得某种清晰。

The symmetry characters of quasiperiodic crystals and incommensurable phases were discussed.

讨论了准晶体及无公度相的对称特点。

In order to realize the DSP compile of fuzzy control,an index block of fuzzy space was compiled,utilizing the input/output fuzzy space symmetry.Based on the TMS320LF2407A,a novel fuzzy algorithm program method for V/F induction motor control system has been proposed.

针对模糊控制器的DSP编程实现问题，依据模糊输入、输出空间的对称性，采用对空间分区建立索引表的方法，建立了一种基于TMS320LF2407A的新型模糊控制器的编程实现框图，并应用在交流感应电动机V/F闭环变频控制系统的速度环中。

Virtual Manufacturing ; Principle of symmetry ; Inequation of Schwarz

虚拟制造；对称性原理； Schwarz不等式

By symmetry method, we successful solved (1) the problem of the half infinite plane received the concentrated strength in vertical direction ;(2) the problem of the wedge received the strength in its top.

用对称方法成功求解了(1)半无限平面受有法向集中力作用问题；(2)楔形体在楔顶受力问题。

Using this method,we discussed for generalized Burger equation with variable coefficients and linear danping,obtained its symmetry group,simliar reduced equations,infinitesimal generator and Lie algebras;In chapter 6,using the Exp-function method,the generalized solutions of combined KdV-mKdV equation with variable coefficients are discussed.

首先介绍了Lie群分析法的基本思想，其次用Lie群分析法得到了带线性阻尼项的变系数广义Burgers方程的无穷小变换、无穷小算子的李代数结构，并具体求出了带线性阻尼项的变系数广义Burger方程的群不变解和约化方程。

In chapter 1, as a preparative knowledge, the main results about symmetry theoryand Wus method are introduced, in addition some fundamental definitions, such as trans-formation group, infinitesimal operator, prolongation, first integral, infinitesimal criterionfbr invariance of an ODE, characteristic set are recalled.

第一章中作为预备知识简单介绍了对称理论和吴方法，并给出了一些基本概念和理论，如变换群、无穷小算子、算子延拓、首次积分、微分方程在对称下不变的判别准则和微分特征列集算法。

At first,the Noether symmetry and Noether conserved quantity under special infinitesimal transformations are.

自1918年Noether首次揭示对称性与守恒量之间的潜在关系以来，Noether对称性理论已取得重大进展[1～4]。20世纪70年代末发展起来的Lie对称性理论也取得重要进展[3～5]。

Discrete mechanics,dynamical equation,infinitesimal transformation group,symmetry,conserved quantity

中文关键词离散力学，动力学方程，无限小变换群，对称性，守恒量

I think people in this lifetime in a rebirth.

我觉得人在这一生里其实也在轮回。

He had to tie her hands together.

他不得不把她的双手绑在一起。