查询词典 perturbed system

Specifically, there are three kinds:(1) constant variation method to track two-body problem the root number of variables to establish perturbed equation;(2) coordinate perturbation method in order to track objects in real position and the location of an intermediate orbit perturbation differential equation as a variable to establish;(3) transformation theory, through a series of canonical transformation to reduce the order of the equations of motion to make it a more simple form.

具体做法有三种：（1）常数变异法，以二体问题轨道根数为变量建立摄动方程；（2）坐标摄动法，以天体在实际轨道上的位置与某一中间轨道上的位置差作为变量建立摄动方程；（3）变换理论，通过一系列正则变换，降低运动方程的阶数，使其具有更简单的形式。

The property of translate invariant transformation in randomly-perturbed periodic structure is widely extended, owing to the demonstration of its origin from the spectral periodicity of the periodic structure.

4指出无序扰动周期结构中关于局域长度的平移等价变换是扰动前周期结构光谱周期性的结果，从而将该变换推广到所有厚度无序扰动的周期结构。

In the present work,the existence and uniqueness results aboutperiodic boundary value problems for different kinds of the nonlin-ear periodically perturbed nonconservative systems are establishedthrough the discretization technique,under suitable assumptions,by using global inverse function theorem and result about the ex-istence and uniqueness of periodic solution for nonhomogeneouslyfirst order linear periodic boundary value problem.

本文的第一章概述了在讨论原问题解的存在唯一性过程中以及构造和分析相关的数值求解方法时将要用到的全局反函数定理、有关矩阵特征值的若干重要引理、线性常微分方程非齐次周期问题解的存在唯一性定理和单参数影射方法及有关结论，并简单回顾了已有的证明非线性微分方程周期边值问题解的存在唯一性的方法，其中包括谱理论、最大最小化形式方法、摄动技术和全局反函数理论方法，最后，介绍了两类数值求解非线性微分方程问题的方法。

Finally,by applying a ran-dom version of Kifer's large deviation theorem and the volume lemma,we prove thelevel-1 LDT for randomly perturbed Axiom A attractors of diffeomorphisms withrespect to the Lebesgue measure.

最后，利用Kifer的大偏差定理的随机版本和体积引理，我们证明了微分同胚的公理A吸引子的随机扰动系统相对Lebesgue测度的level-1 LDT。

This paper presents the interconnection structure and its linear fractional transformation of a class of parameter perturbed systems.

对参数摄动系统的互联结构阵及其线性分式变换给出了可在统一框架下进行处理的方法。

Results: Resveratrol significantly ihibited growth and proliferation of SW480 cells in time and dose dependent manner.Resveratrol perturbed cell cycle,and arrested SW480 cells in S-phase accompanied with reducing G2-phase cells.The ultrastructural change of the SW480 cells treated with resveratrol were as following:the number of microvilli on the surface ofplasm membrance decreased and the nucleolar margination was frequent in nucleus.

结果：白藜芦醇能抑制SW480细胞的生长增殖，并呈时间浓度依赖性；白藜芦醇能影响SW480细胞的细胞周期分布，使细胞周期阻滞于S期，G1期细胞减少；经白藜芦醇处理的SW480细胞可出现细胞超微结构的改变：可见染色体边聚，细胞表面突起减少，胞质内空泡化等凋亡形态的变化。

Perturbation method of boundary geometry is used in rectangular waveguides with one-dimension perturbed walls and mode analyses are made.

用边界形状摄动法研究具有一维扰动壁的矩形波导问题并对其进行了模式分析。

The method of calculating the perturbed Chebyshev-Padé approximation is proposed for not only the general situation but also some special cases, i.e., an odd function and an even one.

提出了一种新的带有扰动的Chebyshev-Padé逼近，它依赖于一个扰动参数，其优点在于：它可以通过调整扰动参数来提高逼近的精度。

A class of singularly perturbed boundary value problem of weakly nonlinear equation for fourth order on the finite interval with two parameters is considered.

讨论了一四阶具有双参数的弱非线性方程在有限区间上的奇摄动边值问题。

Even if the 20-year-old center loses some of his $109 per diem because of Jackson-enforced infractions such as tardiness, Bynum isn't perturbed by much these days.

即便这位20岁的中锋因为杰克逊强制制定的一些违规的行为，例如拖拖拉拉，而遭到了罚款(109美元中的一部分)，但是最近这点损失并没有困扰到他。

Researches reveal that students who suffer from corporal punishment tend to resort to violence in their future life.

研究表明遭受过肉体惩罚的孩子倾向于在他们今后的人生中使用暴力。

Total sugar of sarcocarp and chlorophyll of pericarp increased firstly, and then decreased afterward along with altitude; Titratable acidity, ascorbicacid and anthocyanin of pericarp were increased along with altitude; The content of protein increased firstly and decreased afterward along with altitude; Carotenoid of pericarp were decreased along with altitude.

果肉总糖和果皮叶绿素含量随海拔高度升高先升高后降低；可滴定酸、维生素C和果皮花青苷含量均随海拔升高而升高；蛋白质在1720m处最大，1420m处最小；果皮类胡萝卜素随海拔升高而降低。