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The basicflows are computed by a low-dimensional Galerkin method.The results confirm thattwo times global mode switching occur with increasing Re up to which the Hopf bifur-cation occurs when the absolutely unstable region cover the whole reversed flow region,and the first explanation of this phenomenon with absolute/convective instability theoryis given.

结果证实了只有当绝对不稳定性区域完全覆盖了回流区才会形成整体的Hopf分叉，此前随着Re数的增加整体模态经历了两次跳跃；并首次用绝对/对流不稳定性理论解释了这一现象。

On the whole, we do as follows: Firstly, we list some conceptions and lemmas for later use. Secondly, we inducted the absolute value norm in the two-dimensional vector interspace, and also proved the two-dimensional vector interspace is a Banach Interspace. Thirdly, we define two-dimensional vector-valued functions on a interval by the definition of -fine partitions in part 1. Then, some sufficient and necessary conditions of integrabel are given, and discuss the property of the integral on two-dimensional vector-valued functions.

主要包括以下内容：在第一部分，我们介绍了本文所用到的几个基本概念和引理；第二部分，我们在二维向量空间中引入了绝对值范数，并且证明了二维向量空间是一个Banach空间；在第三部分中，通过第一部分关于-精细分划的定义，我们给出了在某区间上二维向量值函数积分的定义以及可积的充分必要条件，并讨论了二维向量值函数积分的一些性质。

An analysis on camera critical motion is given and a conclusion is proposed which clarifies that the critical motion is decided by the ambiguities of the absolute quadric.

通过对相机的临界运动进行分析，指出了相机运动的关键性在于绝对二次曲面求解的模糊性这一结论。

As an application, a stability criterion for the absolute stability in the MIMO case is given.

得到了离散时变系统MIMO情况下的绝对稳定性问题的一个判据。

The results are applied to absolute stability problems, and the time-varying circle criterion is given.

这样就弥补了以往的结果只能处理时不变问题而难以处理时变问题的不足。

The parameters optimization design model is proposed, which is based on a control model with the quasi-Euler angle, Euler angle velocity and absolute angular velocity as the feedback. The vibration-resistance parameters of the given controller are chosen as the optimization variables, and the on-off times of the engines is chosen as the optimization objective function.

基于一类采用拟欧拉角、拟欧拉角速度和飞行器绝对角速度为反馈信号的姿态机动控制模型，以其消振参数为优化变量，开关次数为优化指标，建立了姿态机动参数优化模型。

Given these linearity and absolute zero properties,single point calibration is possible.

考虑到这些电流的线性和绝对零数值属性，是可以进行单点校准的。

A modified mutation operator in BCA, Contiguous Region Hypermutation Operator, was introduced; a Markov chain model of the BCA was proposed; a novel method for the construction of transition matrices for the BCA was given. Consequently, it was proved that the BCA was convergent absolutely.

给出了在BCA中使用的一种变异算子－连续区域超体变异算子和BCA的Markov链模型，提出了一个新的构造算法的状态跃迁矩阵的方法，证明了BCA的绝对收敛性。

In order to improve the power quality of distribution network system, one of the most effective methods is reactive power compensation. In this paper, the Distribution Static Synchronous Compensator for reactive power compensation was studied, and then the digital controller based on One-cycle control was designed. The waveforms of experimental device based on DSTATCOM of one-cycle control were given in this paper. It can be seen from the results that the fluctuation of DC capacitor voltage is lower, the dynamic response speed of DSTATCOM providing or absorbing reactive power is fast, and the accuracy of steady-state compensation can achieve the requirements of reactive power compensation in engineering basically

为了提高配电网系统的电能质量，对无功功率进行精确补偿是非常有效的方法之一；本文研究了配电网静止同步补偿器用于无功补偿，并设计了单周控制的数字控制器；文中给出了基于单周控制的DSTATCOM无功补偿试验装置工作过程中的波形曲线，从试验结果可见，本文设计的单周控制DSTATCOM无功补偿装置的直流侧电容电压在工作过程中波动较小，装置发出或者吸收无功功率的动态响应速度较快，稳态补偿精度基本能够达到工程中无功补偿的要求。

This is the time when other people are absorbing the information you have given.

这段时间里，人们回味，体会你所提供的信息。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！