振

A threshold current which brings about the transition to absolute instability was investigated.

分析表明，绝对不稳定性的起振存在一定阈值，起振电流对电子注参数和电路参数极其敏感，确定起振电流是稳定器件工作的前提条件。

The full text is as follows : Abstract Zhendong equipment maintenance group on the Hong Kong Container Terminal Zhendong Group affiliates (hereinafter referred to as "Zhendong Company") engineering technology an important subordinate of the team is to protect branches of production equipment efficient and safe operation of the key.

振东设备维修组是上港集团振东集装箱码头分公司（以下简称"振东公司"）工程技术部下的一个重要的班组，是保障分公司生产设备高效安全运行的关键。

Liquor-making enterprises in Sichuan had suffered great loss from May.12 Wenchuan Earthquake. The main reasons for distilleries' loss were analyzed and the following recommendations were put forward for the reconstruction and the restoration of the damaged distilleries: 1. layout design of workshops strictly followed relative national requirements and anti-earthquake grade of key workshop enhanced advisably; 2.the techniques of shock isolation, shock absorption and shock prevention etc. should be applied in...

在5·12汶川大地震中，四川白酒企业遭到了重大损失，分析了其主要原因，并建议白酒厂在新建、改建、扩建时满足以下条件：①严格按照国家有关规范中规定设计，对重点车间适当提高设防等级；②逐步将隔振、减振、制振等技术应用到白酒厂房屋设计与生产设备安置中；③贮存容器安置要科学合理，并采取适当的保护措施，大型贮存容器的设计要考虑底部抗压问题，以防止次生灾害的发生。

And then the partially polarized and coherent Gausian-Schell beam is taken as a numerical example to study the influence of the polarized grating TE and TM complex transmission and some parameters of the incident PGSM on the polarization degree of the diffraction field and the diffractive orders's angular correlation in details.

以部分偏振的高斯-谢尔模型光束为例，数值分析了偏振光栅TE和TM波的复振幅透过率、入射光束的光学参量对衍射场偏振度和场中各衍射级次的角相关的影响。

Correlation between spin angular momentum s and background angular momentums of planets;2. In the paper the principle of optical rotation due to the transfer of spin angular momentum from light to particles was discussed by analyzing the interaction between the beam of light and birefringent crystal particles, and then an optical tweezers was formed on nanometer optical tweezers system with a linearly polarized light beam (He-Ne laser 633 nm, 10 mW).

从理论上分析了偏振光束与双折射晶体粒子的相互作用过程，讨论了由于光束自旋角动量向晶体粒子的传递所导致的光致旋转效应的原理，并在纳米光镊装置上利用线偏振He Ne激光器(633 nm，10 mW)形成了光镊光阱，利用1/4波片来改变光镊光束的偏振状态，在不同的椭圆偏振状态下实现了直径约为几微米的CaCO3 晶体微粒的捕获和光致转动。

A 6-RSS parallel mechanism is used as the main mechanism of six-dimension vibration absorber bemuse of its advantage on simple structure,the compact type,the high precision, easy-to-control and so on.

基于并联机构的多维减振平台系统是多维减振领域里的新理念，新突破，在减振领域有着重要的应用前景和开发价值。

This paper discusses the work principle of elastic vibrating- rod sieve, and through the transformation of the existing circular sieve-shakers, illustrates the functions of elastic vibrating-rod sieve in the process of the fine screening of moist coal , and points out some existing problems and developing directions in the future.

论述了弹性振杆筛的工作原理，通过对现有圆振筛的改造，阐明了弹性振杆筛在解决湿煤细筛分过程中的作用，并指出了存在的问题及今后的努力方向。

Have different crystal forms, are more often the columnar crystal, as well as films with crystal, but function the same.

晶振也有不同的形态，有比较多见的柱型晶振，还有帖片晶振等，但功能作用是一样的。

Furthermore,the influence of parameters such as the horizontal power spectrum density, basic wind pressure,span and weight of the roof,damping ratio,terrain categories and support restraints,which are usually critical to the wind vibration factor,are also discussed.

本文基于随机振动理论利用有限元程序ANSYS对大跨度实腹式钢梁在频域内进行了风振分析，讨论了高阶振型、脉动风速谱、基本风压、屋盖重量、地貌种别、阻尼比和支座约束等相关参数对屋盖结构风振响应和风振系数的影响。

Test results show that the flowing resistance of ER fluid can be changed by varying its electric field,and then the damping force of ER shock absorber could be best controlled to meet the needs of vehicle's safety and comfort performance.

本文主要介绍ER流体在汽车减振器中的应用，即电流变减振器。传统的液压式减振器是一种被动形式的减振器，其阻尼力由节流阀压力产生。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷