失稳

Adjusting some parameters of the system can change the threshold speed, distribution of the critical speed and the damping characteristics of the system.

在此基础上，详细研究了齿轮参数、轴承参数和结构参数对二平行转子—轴承系统和DH型透平压缩机的失稳转速、临界转速和不平衡响应的影响。

The critical voltage is the critical state of voltage stability and voltage instability.

临界电压是电压稳定与电压失稳的临界状态。

Adiabatic shear instability will take place when the normal component of particle velocity excesses critical value.

发生绝热剪切失稳的条件是入射速度的法向分最大于碰撞过程的临界速度。

Detailed studies are made as follows: Searching the key internal factors which can affects slope stability. According to the geological data which was gained by exploration investigation, establishing a geological model which can reflect rock mass characteristics;With analyzing the internal and exterior factors synthetically, the deformation and possible failure mechanism and mode of the cut slopes was confirmed which combines with stereoic projection and other techniques;The stabilities of the 14 high slopes are estimated synthetically by applicable design codes and guidelines. With the estimate result and some other analysis methods, the rock mass mechanical parameters of slope are identified;As a results, 14 high slopes fall into 4 categories based on rockmass characteristics and discontinuities. The stability and deformation of some typical slopes was analyzed with distinct element method by UDEC;The safety factor of some dangerous slopes are calculated by rigid limiting equilibrium method for coMParison.

首先着重研究影响边坡稳定性的内在因素，主要是通过地质勘探、测量、现场观测等手段取得研究区地质体的基础地质资料，建立起能够反映地质体结构特征的地质模型；随后综合分析潜在的内外部影响因素，并结合赤平投影对边坡可能的失稳模式或破坏机制作出判断；运用已有岩体质量分类方法对沿线14个高陡边坡稳定性进行初步的评价，并结合试验研究、经验判断、工程类比等手段确定了坡体的岩体力学参数；根据稳定性初步评价结果将研究区14个高陡边坡按开挖方式分为4大类，并利用离散元程序UDEC对各类典型高陡边坡进行了稳定性计算分析；对潜在危险边坡利用刚体极限平衡法求出了不同工况下的安全系数。

In this thesis, the stability and Hopf bifurcation of a neural network model described by a delay differential equation are investigated.

中文摘要：本文研究了一类具时滞效应的神经网络模型的平衡点的稳定性以及平衡点失稳后产生的Hopf分岔。

The above research results provide a solid basis for prediction and control of large-scale destabilization in the mine.

研究结果为6m厚煤层一次采全厚形成的大尺度采空区大范围失稳的预报与最终安全控制提供了定性和定量化依据。

For coalescence is one of the main ways which leads to destabilization of emulsion, it has been intensively studied by the academy and industrial researcher.

乳液粒子间的聚并是乳液主要的失稳方式之一，在近几十年来受到了学术界和企业研究人员的重视。

Coal crack and destabilization quantitative experiment is a fundamental study on forecast dynamic hazard of gob area.

煤岩破裂与失稳的定量化实验是准确预测预报采空区动力学灾害的基础研究。

By discussing the eigenvalue relation of the coefficient ,λ and η in Mathieu equation, means determining the boundary lines between the steady and unsteady solution areas of Mathieu equation, the criterion equation of the problem is presented here.

通过具体算例，给出了四边固定载流矩形薄板的磁弹性动力失稳临界状态与相关参量之间的关系曲线，并对计算结果及其变化规律进行了分析讨论。

The combined effect of the tensile stress and seeped water is the direct cause of dilapidation of this silty clay slope.

张应力和水的共同作用，是导致了边坡失稳的直接原因。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。