查询词典 instability

Active and semi-active controls for the parametrically excited instability of an inclined cable under support-motion excitations are studied in this thesis.

本文研究斜拉索在支座运动激励下参激不稳定性的主动与半主动控制。

It is also important to find out when a certain dynamic behavior is stable under small perturbations, as well as to understand the various scenarios of instability.

此外，找出给定动力系统的动力学性质在某个小扰动下何时是稳定的，以及了解不稳定性的多种方案也是很重要的。

The result shows that gravity wave excited by the tropopause forcing can propagate stably to the mesosphere through the stratosphere so that the energy and momentum can be transferred from a region to another. In the propagation, gravity wave undergoes growth, overturning, convection and breaking. The breaking of gravity wave is the important source of convection and smallscale waves, and convective instability and overturn are the character of nonlinear phenomenon.

分析结果表明，从对流层顶激发的重力波能稳定地经平流层传到中层顶，从而将能量和动量从一个区域带到另一个区域；在向上传播过程中，重力波经历了发展、位温翻转、对流直至最终破碎的演变；重力波的破碎是对流和小尺度波动的重要的源，对流不稳定和翻转是非线性现象的一个基本特征。

The wave propagation and refraction of type "O" irregularities in the counter-electrojet conditions is investigated with a model electrojet in terms of the linear theory of the electrojet instability.

本文分析了反向赤道电射流条件下的不均匀性的对流放大特性。根据电射流不稳定性的线性理论，对一个分层均匀的电射流的模式的数值计算表明：在反向电射流条件下，电射流不均匀性有如下的特性：在波的传播过程中，在上电射流区内，波矢向下旋转，在下电射流区内，波矢向上旋转；在驱动电场E_D数值相同的情况下，反向电射流条件下的射线路径积分增长率r比正常电射流情况的要小得多。

Tornadoes have a strong instability in the cumulonimbus of.

龙卷风产生于强烈不稳定的积雨云中。

It can operate at high pressure by reducing the dimension of the cathode to sub millimeter level. MHCD can be used as plasma cathode for high-pressure glow discharge to solve the instability of glow-to-arc transition.

将MHCD作为大体积辉光放电的外部电子源，可以解决高气压下大体积辉光放电不稳定的问题。

Others, in this age of instability, fell prey to con men, such as Samuel Solomon, who made a fortune selling his cure-all secret recipe "Balm of Gilead".

另外一些人在这个不安定的年代中走向了反人类的歧途。例如萨缪尔·索罗门通过出售他的百宝丹秘方&基烈软膏&大赚了一笔。

Fusion and stabilization with instrumentation have often been avoided in children due to concerns over instability following future axial skeleton growth.

由于儿童的脊柱将会不断生长，会导致脊柱融合及器械固定的不稳定，所以该术式一直被避免。

The results here show that the blade lag damper can greatly reduce the instability range of a helicopter, and that the pitch angle of blades takes an important role in the stability of ground resonance, as it does in the flap-lag stability of a blade

本章结果表明桨叶的减摆器阻尼可以有效地减小不稳定运动发生的区域。并且，同桨叶的挥摆稳定性一样，桨叶变距角也是影响&地面共振&稳定性的一个重要因素。

Domestic economic instability and military defeat in 751 by arabs, marked the beginning of five centuries of steady military decline for the Chinese empire.

国内经济上的动荡加上751年与阿拉伯作战所造成军事上的重创标志着中国帝国在500年的军事稳定后的衰退。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。