不稳定性

This paper uses the face-on radiography technology to investigate the Rayleigh-Taylor instability of sine modulated surface target at the Shengguang Ⅱ facility and gains vivid space and time resolution images.

在神光Ⅱ装置上，利用面向背光照相技术对正弦调制平面靶的瑞利-泰勒不稳定性增长进行了实验研究，得到了清晰的时空分辨图像；采用傅里叶变换取基模法和求波峰波谷差值法分析了实验结果；两种方法得到的靶扰动增长因子相同。

ABSTRACT Applications of natural potato starch and sweet potato starch are confined to a certain extent because of heat-resisting instabili...

天然马铃薯淀粉和甘薯淀粉由于其糊的热不稳定性、较弱的耐酸碱性和较差的冻融稳定性而限制了其使用范围。

The shear layer vortices dominate in the initial portion of the jet, which are a result of the K-H instability. The crossflow encounters an adverse pressure gradient ahead of the jet and separates to form horseshoe vortices under the pressure downstream, and they develop into the wake. The wake vorticity comes into being in the actions of an adverse pressure gradient and a wall-normal component of vorticity, which originates from the wall boundary and is entrained into the jet. The shear layer vortices encounter adverse pressure gradients in the lee of the jet and break down, leading to the formation of the CVP and the CVP is the most important characteristic of the jet in crossflow.

文中指出：剪切层涡源于射流与横流之间的K-H不稳定性；马蹄形涡的产生是由于射流喷口上游迎风侧的壁面边界层内存在逆压梯度，使流动发生了分离，在下游逆压梯度的挤压作用下，形成了马蹄形涡，马蹄形涡向下游发展，进入尾迹区；在逆压梯度和法向涡生成项的共同作用下产生了尾迹涡，尾迹涡源于壁面边界层，止于射流，并将部分涡量向上输运至射流内部的CVP；CVP是横向紊动射流的重要特征，剪切层涡破裂后，在逆压梯度的作用下CVP形成。

The technique of lag screw fixation is able to reduce and fix the unstable injuries in the posterior ring of pelvis perfectly and immediately after operation.

拉力螺钉固定技术可使不稳定性骨盆后环获得良好的即刻复位和固定，恢复骨盆环的稳定性，适用于骶髂关节脱位及骶骨骨折患者。

Result showed that TF55 could not help in improving thermostability of ligase at 85℃. The possible reason might be that at 85℃ in vitro, the chaperonin itself was denatured.

结果表明：在体外85℃时，分子伴侣未增加连接酶的热稳定性，可能的原因是在85℃体外状态下TF55本身就表现出不稳定性。

A code is written to simulate BBU in induction linac according to theoretic analysis.

在理论分析的基础上，开发了直线感应加速器束流崩溃不稳定性数值模拟程序。

They were all in SCOTT connection, and to avoid the academically foreseen instability problems ( due to decreasing melt resistance with increasing temperature ) every heating zones was equipped with power-constant regulation, as well as temperature control.

他们都是在斯科特方面，并应避免在学术上所预见的不稳定性的问题，（因降低熔体电阻随温度升高），每个采暖区配备了功率恒定的规管，以及温度控制。

The other factor making confinement improve is plasma rotation which is present in almost all current tokamaks It has been shown that the plasma rotation plays an important role in creating or maintaining transport barriers Some researcher have started considering the transport, the instability, and so on in the rotating plasma in the reversed shear configuration.

另外，早先发现等离子体旋转也是改善约束、输运垒形成的重要因素，一些人开始考虑在反磁剪切位形下旋转等离子体中的输运、不稳定性等问题。在本论文中我们把反磁剪切位形下有旋转的托卡马克等离子体理解为高约束先进托卡马克等离子体。

The first is that the effects of the magnetic curvature on the resistive interchange mode in tokamak plasmas.

首先是磁曲率对等离子体电阻性不稳定性的影响。

Objective To assess the efficacy and safety of intracoronary stenting in acute phase of unstable angina pectoris.

目的 观察冠状动脉内支架术治疗不稳定性心绞痛的疗效和安全性。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。