不稳定性

While Japan contributes the least to export instability, and Japan can obviously smoothen other markets' fluctuation on export instability.

而日本对出口不稳定性的贡献最小，且日本明显能平抑其他市场的波动对出口不稳定性的影响。

The paper also conducts experimental investigation and theoretical analysis of static instability, such as subcool boiling instability, intermittent boiling instability and geyser instability.

通过微小偏差法将非线性的液钠两相流动的基本方程组线性化和无量纲化，应用系统控制理论建立液钠沸腾流动不稳定性的理论分析模型，可以对液钠沸腾发生两相流动不稳定性进行预测计算。

In contrast to that seoondary instabilities of the fundamental mode occur in a wide scope of spanwise wavenumber We have found so called' translative instability'at β=0 and bifurcation phenomenon for am...

与之相反，基本模式的三维扰动在很大的波数范围内存在不稳定性，证明β＝0时存在&转移&不稳定性；当KH波的幅值A≥0.06时出现分叉现象。

The real tangential velocity fluctuation indicated that there existed an instability of swirling flow in the cyclone.This instability resulted in the rotation center of the swirling flow deviating from the geometric center of the cyclone,which produced the quasi-periodic oscillation of swirling flow and gave the real tangential velocity fluctuation.

瞬时切向速度的变化反映了旋风分离器内旋转流的不稳定性，这种不稳定性导致了旋风分离器内旋转流的旋转中心与几何中心不重合，旋转中心围绕着几何中心摆动，由此造成了瞬时切向速度随时间的类周期的波动变化。

However, the X-ray radiation power increases as the load current. The MARED code is found able to reproduce the primary dynamic characteristics of the Z-pinch implosions, and the development of the instability qualitatively agrees with the simplified instability theoretical analysis and experimental results.

MARED程序能够较好的反映Z箍缩内爆动力学过程，特别是不稳定性发展的二维图像，能够给出与不稳定性简化模型的理论分析及实验结果定性一致的演化规律。

These conclusion are of important significance in selecting fiber parameters and initial lanched power reasonably to use MI to realize the production of the high speed soliton with narrower width.

研究发现，五阶非线性下的调制不稳定性不仅可在异常色散区产生，而且也可在正常色散区产生，据此提出了利用正常色散区的调制不稳定性产生暗孤子的方法。

Simulations of the full system demonstrate that the development of the MI in the former regime leads to the establishment of a regular or chaotic array of pulses if the MI saturates, or a chain of well-separated peaks with continuously growing amplitudes if the instability does not saturate.

系统仿真结果表明：如果充分考虑调制不稳定性，则该系统将产生规则或者不规则的脉冲序列。反之，如果不考虑调制不稳定性它将产生一连串具有连续增长振幅的离散峰。

Firstly, we simulate the influence of pump waves on two-stream instability occurred at heights of equatorial ionospheric E region. The simulation results show that pump waves can control the two-stream instability, that's to say, pump radio can stabilized or unstabilized this instability.

首先，模拟了加热泵波对赤道电离层E区双流不稳定性的影响，模拟结果定性地表明，在一定条件下，加热泵波对发生在该区域的双流不稳定性有很好的致稳或不稳作用。

Are given out, and then a survey and review of the literature up to 1980 is given of the linear theory of the ideal and resistive hydromagnetic instability of tokamak. Some important characteristics of MHD instabilities are discussed in more details. Since sawtooth oscillation is discovered in ST tokamak, many theory models are proposed to explain the disruptive part of sawtooth, however, there is no satisfactory theory of the internal disruption.

本论文对锯齿振荡和L-H转换作了研究，主要开展的工作如下：在论文的开始部分，给出了基本的MHD方程，对至1980年文献水平的托卡马克中理想和电阻性情况下的磁流体不稳定性的线性理论作了简要回顾，讨论了某些重要的不稳定性特征。

Collisinal Rayleigh-Tailor instability in the ionospheric F region of lowand mid-latitudes is discussed.

讨论了中低纬度电离层F区中有碰撞的Rayleigh-Taylor不稳定性的线性增长率，着重考察背景中性风对增长率的影响，首先建立了适合于描述中低纬地区R-T不稳定性的基本方程，其中包括背景中性风和电场。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。