不稳定性

The coupled frequency equation is obtained by using double velocity potential functions.

因此，在某些条件下，流体可压缩性对R-T不稳定性的影响是不能忽略的。

This two-stream instability generates the energy exchange between the electron beams.

这种双流不稳定性导致两个电子束之间的能量交换，最后由输出腔变成微波放大输出。

According to RS model, radio radiation come from the coherent curvature radiation, and the coherent mechanism is the two-stream instability produced by that primary particles move through the second generation particle plasma.

根据RS模型，射电辐射来自于第二代粒子的相干曲率辐射，而相干机制则是原初粒子穿过第二代粒子组成的等离子体时形成的双流不稳定性。

The numerical results show the two-stream instability of two electron beams can produce Cherenkov radiation through the interaction between the fast space charge wave and the slow space charge wave, and the frequency of radiation can be above the plasma frequency.

通过快慢空间电荷波的相互作用，两电子注引起的双流不稳定性可以产生契伦柯夫辐射；当等离子体频率超过双注相互作用的频率范围后，可以大大加强和改善等离子体、两电子注三者之间的相互作用。

Using the two-stream fluid model, the linear dispersion relation is derived assuming a two-dimensional spatial geometry. Two cases are considered, one is that the 2D spatial geometry is defined by the plane containing the two counterstreaming electron populations and the perturbation wave vector , and the other is that the geometry is defined by the plane being vertical to the two counterstreaming electron populations .

对高能束流和电子回流构成的双流系统，建立冷等离子体流体模型，采用简正模分析方法，分别考虑扰动波矢在平行于电流传播方向的平面上和在垂直于电流传播方向的平面上这两种情况，推导了不稳定性的色散关系。

The region where it produces two-stream instability is encircles by three boundaries: the outer open field lines, the nearest distance where the instability could take place (corresponding the charactistical frequence is equal to the plasma frequence), and the largest distance where the instability could take place along field lines.

可以发生双流不稳的区域是由三个边界面围成的：一是最外的开场线。一是不稳定性可以发生的最近距离(对应于曲率光子特征频率等于等离子体频率的地方)，最后是沿磁力线能够激发起双流不稳性的最大距离。

Using the MAGIC PIC simulation program,the author simulated the S-band RTSA,studied the two-stream interaction mechanism and deeply understood the two-stream instability that generates the microwave amplification.

标 签 MAGIC 粒子模拟相对论双流放大器双流不稳定性 S波段 MAGIC PIC simulation Relativistic Two-Stream Amplifier two-stream instability S-band

These results indicate that short-penetrating irradiation can effectively trigger the plant genomic instability at the level of plant.

以上实验结果表明，低穿透能力的辐射能有效增加植物基因组的不稳定性。

And the methods for studying the nonlinear dynamical stability are applied to analyze the nonlinear thermal stability of the thrust bearing.

并用研究动力系统稳定性的方法对推力轴承系统的热不稳定性进行了非线性分析，研究了系统的热稳定性。

A computer simulation based on strong-weak model shows good agreement with the linear theory. The linear theory of the ion trapping instability caused by ions in equilibrium is also introduced in this paper.

包括不稳定性的增长率与中性化系数的关系、阈值与中性化系数的关系、束流的相干频率漂移和展宽、离子在空间的分布和尺寸、离子动态丢失的机制以及离子在储存环内积累的极限。

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％。