查询词典 instability

However, operating of the high current, the output power, gain, and efficiency of gyro-TWT will be degraded where the absolute instability, gyrotron backward oscillation and reflective oscillation occur to cause mode competition. Stability issues comprise the key factors limiting the performance of the gyro-TWT.

对於高电流的影响，磁旋行波放大器将有可能引发绝对不稳定、磁旋返波振荡(gyrotron backward oscillation；gyro-BWO)及反射振荡，造成模式竞争而抑制原先操作模式的放大波，进而影响其输出功率、增益及效率。

The basicflows are computed by a low-dimensional Galerkin method.The results confirm thattwo times global mode switching occur with increasing Re up to which the Hopf bifur-cation occurs when the absolutely unstable region cover the whole reversed flow region,and the first explanation of this phenomenon with absolute/convective instability theoryis given.

结果证实了只有当绝对不稳定性区域完全覆盖了回流区才会形成整体的Hopf分叉，此前随着Re数的增加整体模态经历了两次跳跃；并首次用绝对/对流不稳定性理论解释了这一现象。

This paper, with the analysis of the propagation characteristics in a lossy cylindrical waveguide and using small-signal theoretical dispersion relation, presents study on the device stability with influence of the absolute instability and the backward wave oscillation in TE01-mode lossy dielectric-load gyrotron traveling wave amplifier.

摘要该文从分析损耗介质加载金属圆波导中电磁波传输特性出发，应用回旋行波管放大器小信号色散方程，研究损耗介质加载结构TE01模回旋行波管放大器绝对不稳定性振荡和回旋返波振荡对器件稳定性的影响。

The absolute/convective instability of incompressible swirling flows and the temporalinstability of compressible swirling flows have been fully explored, whereas the absolute/convectiveinstability of compressible swirling fl.

从N－S方程出发，通过正则模方法，研究了超声速尾涡的绝对／对流不稳定性性质。

However, operating of the high current, the output power, gain, and efficiency of gyro-TWT will be degraded where the absolute instability, gyrotron backward oscillation and reflective oscillation occur to cause mode competition. Stability issues comprise the key factors limiting the performance of the gyro-TWT, therefore physical origins of spontaneous oscillations in the gyro-TWT are analyzed and characterized.

然而受限於操作高电流，磁旋行波放大器可能引发绝对不稳定性、磁旋返波振荡(gyrotron backward oscillation；gyro-BWO)及反射振荡，造成模式竞争而抑制原先操作模式的放大波，进而影响其输出功率、增益及效率。

The appearance of stress peaks due to the material instability as the strain increases above acritical value is detailed.

详细考察了阶跃应变中由于材料不稳定性造成应变增加时出现的应力峰值。

You dare not, you cannot deny that you have been the principal, if not the only means of dividing them from each other, of exposing one to the censure of the world for caprice and instability, the other to its derision for disappointed hopes, and involving them both in misery of the acutest kind.

你不敢否认，而且也否认不了，把他们拆散，——即使不是你一个人干的，你也是主谋的事实。你让一个人受到世人的指责，说他三心二意，反复无常；而另一个人则成为笑柄，说她痴心妄想，你让他们俩都陷入了最深重的痛苦。

You dare not, you cannot deny that you have been the principal, if not the ssbbww.com means of dividing them from each other, of exposing one to the censure of the world for caprice instability, the other to its derision for disappointed hopes, involving them both in misery of the acutest kind.

说起他们俩的分离，即使不是你一个人造成的，也是8tt t 8。 com 你主使的，这你可不敢否认，也不能否认。你使得男方被大家指责为朝三暮四，使女方被大家嘲笑为奢望空想，你叫他们俩受尽了苦痛。

The above global instability and mechanism is confirmed in the adiabatic case.

上述的不稳定性及物理机制在绝热情形下得到了进一步的证实。

The boundary line between stability and instability is the dry adiabatic lapse rate line.

稳定的和不稳定的界限就是干的绝热垂直率线。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。