查询词典 critical point

The catastrophe theory conditions and displacement formula of critical off-stability point is carried out.

提出了突变条件和临界失稳点的位移值公式。

It also summarizes the same point between signal timing and lane channelization in nature and illustrates that it is optimal cycle length and signal phase that is the critical part of signal timing.

用数据说明了确定最佳周期长度和调整好信号相位是信号配时的关键所在。

The paper includes:The author calculate the structures inner force and displacement of the free end , analyze the influence of the height and the value of pretress of cable by making use of ANSYS 9.0 soft, pose the concept of critical prestress,conclude the function relation between displacement of the free end, initial strain and the height of cable ,analyze the dynamic properity and point out that Newmark-β method should be adopted when we analyze the dynamic properity of the cable-stayed spatial structure with direct integral test to guarantee the contribution of high mode,finally conclude the functional relation among coefficient of earthquake inner force, initial strain and the height of cable, wish to get some helpful conclusion applied to cable-stayed spatial truss design.

本文系统介绍了斜拉空间桁架竖向地震反应的分析理论与方法、详细分析了斜拉空间桁架结构在静力和竖向地震作用下的受力性能，主要内容包括：利用通用有限元软件ANSYS9.0计算了斜拉空间桁架在静力和竖向地震作用下内力及自由端位移分布规律并得出地震内力系数与节间位置、预应力以及斜拉索高度之间的函数关系；详细分析了斜拉索中施加的预应力以及斜拉索高度的变化对于该种结构内力及自由端位移的影响并提出了斜拉空间桁架的临界预应变概念，进而得到了自由端位移与初始预应变以及斜拉索高度的函数关系，即：△=-(40h+2180)ε+9.8；分析了该种结构的动力性能，并指出：在时域内采用直接积分法计算该种结构的动力响应时，应该考虑采用不引起振幅率减小的Newmark-β法，以保证高阶模态响应的贡献仍然保留在响应中而不致于被忽略。

This paper studys the stability of nonlinear systems in two particular critical cases. In a case, the linear systems at the equilibrium point of interest is assumed to possess a simple zero eigenvalue. In the other case, it is assumed to possess a complex conjugate pair of simple pure imaginary eigenvalue.

本文基于中心流形定理研究了非线性系统在两种特殊临界情形下的稳定性问题，一种是与它相应的线性系统在平衡点仅有零特征根，另一种是与它相应的线性系统在平衡点仅有一对共轭的纯虚数特征根。

In this case, the rapping acceleration is independent of ρ×J. From this new point of view, a critical rapping acceleration equation can be given based on the correlation curve of ρ and J presented by Oglesby.

从这一新观点出发，根据Oglesby提供的粉尘层击穿前的电晕电流和粉尘比电阻的相关曲线，得出临界振打加速度计算式。

The organized Crime is a critical social problem and a heat point problem which perplexes the government of each country in the world and followed with interest by the criminological experts and penal experts.

中文文摘有组织犯罪是困扰当今世界各国政府的一个严重的社会问题，也是倍受犯罪学家、刑法学家日益关注的热点问题。

Firstly,"perspectivism"is an kind of method that study literature completely, dialectically and deeply, which become the start point of his critical theory and special visual angle to problems in literatures.

透视主义方法是一种整体、辩证、深刻的文学研究方法，是他批评理论的出发点和对待一切文学问题的独特视角。

Power system ; unstable equilibrium point; critical cut-set ; transient angle stability

电力系统；不稳定平衡点；临界割集；暂态功角稳定性

Based on description method of damping motion in mechanical vibration, variables movement of generator are divided into two basic motion models: damping oscillation and critical damping motion. Detail methods of extracting damping parameters from simulation data is introduced to establish variable motion models. An approximate method is put forward to simulate low-frequency signal and generator response characteristic, from which motion models and damping parameters of main variables are obtained. The influences of oscillation amplitude, frequency and initial operating point of power system to the motion damping parameters are analyzed.

借鉴机械振动中阻尼运动的描述方法，将低频振荡下发电机主要变量的运动归纳为阻尼振荡和临界阻尼两种基本运动形态；介绍了从仿真数据提取阻尼参数建立参数运动模型的方法，实现对发电机振荡特性的量化分析；提出一种系统侧低频振荡信号的近似模拟方法，并应用于发电机响应仿真，获得了主要变量的运动模型和阻尼参数；分析了系统侧振荡幅度、频率以及初始工况对发电机功角振荡的影响。

At some point there will be a "critical mass" of higher consciousness achieved and people will just understand more and you will see this in each other.

在某些时候会出现"临界质量达到更高的觉悟和认识的人只会更加"，你会看到对方的。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。