振

The fundamental principle of PML is briefly introduced. The main performance parameters of PML were determined, and the results were analyzed. The typical detected results of extinction characteristic of aerosols and the structure of cirri at Hefei(117.16°E, 31.90°N) are presented and discussed.

对偏振-米散射激光雷达的性能参数进行了测定，并对测定结果进行了分析与讨论，给出了偏振-米散射激光雷达对合肥市地区(117.16°E， 31.90°N)上空大气气溶胶的消光特性和卷云的结构、退偏振比垂直廓线以及光学厚度的典型探测结果，对这些结果进行了分析和讨论。

Therefore, established a finite element Stable response model of a horizontal whole string and carried out t the safety varied frequency of gas well after researched the natural seriously transversal vibration and compressional vibration frequency range of tubing string with packer and packerless, so that it make the tubing string to avert the covibration frequency range of natural gas excited.

本文认为以某井高产量稳产时，天然气对油管柱的外激励为简谐激振，因此研究中建立某水平井全井段油管柱稳态响应的有限元力学模型，并获得了在无封隔器和有封隔器情况下的油管柱发生严重横振和纵振的频率范围，提出了天然气安全调节频率范围，使油管柱避开可能引起严重破坏的天然气激励频率区域。

Lowest fixed frequency 2.0Hz,endwise and crosswise rate of damp respectively are 0.1~0.15,applying to passive vibration of precise apparatus and motor、compressor etc. With high vibration requirement and high resonance requirement in crosswise to do the active vibration.

型：最低固有频率2.0Hz，竖向和水平向阻尼比均为0.1~0.15，适用于精密仪器设备的被动隔振和发动机、压缩机等隔振要求较高、且对水平向抑制通过共振要求较严的设备作主动隔振

In order to understand the dynamic property of extradosed cable-stayed, built up its plane continous rigid-frame model and compared with each other, concluded that the former is more complex due to the remarkable coupling effect of cable, pylons and box-girder. The dynamic property of box-girder decide the dynamic property of the bridge, whose whole structure is comparative rigid. This paper indicated that the bridge is not attribute to flexible structure, because its basic free vibration cycle is more shorter than the cable-stayed bridge.

为了更好的理解矮塔斜拉桥的动力特性，还建立了平面梁单元的连续刚构模型，并与平面梁单元的矮塔斜拉模型进行了对比分析，结果表明，矮塔斜拉模型由于索、塔、梁的高阶振型耦合显著，其振型较连续刚构复杂，灵江大桥的动力特性主要由主梁的动力特性决定，其结构整体刚度较大，基本自振周期较斜拉桥短，不属于柔性结构。

The temperature can transmit between the operate and the quizzee through the manipulation. But maybe the vibrating manipulation has the thermal effect because this manipulation not only transmit the heat but also excitated the febrific mechanism. Maybe the appropriate time for vibrating manipulation is 3minutes at least.

推拿手法有一定的热传导作用，但振法产热不仅仅是热传导作用，还有可能是激发了受试者体内的某种产热机制；从空振试验模块推拿医师手部的升温现象分析，振法的持续操作时间至少应该达到90s，最佳操作时间可能在3min以上。

The experiment carried out on flexible rotor test bench for torsional vibration measurement shows that the DK-Ⅲ instrument is able to accomplish hish precise measurement.

在挠性转子实验台上的扭振测量实验表明，DK.III型扭振测量仪可实现轴系扭振的较高精度测量。

The analysis indicated that the vibration isolation system under the action of initiative control possesses controllable rigidity and damping characteristics; at the same time by comparing with other electromagnetic structure it was a kind of vibration isolation system with very small vibration isolative power consumption.

分析表明，主动控制作用下的隔振系统具有可控的刚度和阻尼特性，同时与其他电磁结构比较，其是一种隔振功耗很小的隔振系统。

After referencing the specification of the national standard GB/ T11648-89, according to the petroleum industry condition, the torsional vibration, pendular vibration, exciting force self-synchronizing and stability of synchronizing,the stability of vibrate synch ronous transmission of two and more long vibration motors are tested. All of above testing parameters will replenish the blank of both product development and quality test measure of this type of motors both here and abroad.

参阅国家标准GB／T11648-89的技术要求，并针对石油现场的实际条件，本课题对两台和多台隔爆长形振动电机的扭振、摆振、激振力大小，自同步性和同步状态稳定性，振动同步传动稳定性等技术参数进行了模拟动态测试，而这些新增设技术参数的测试均是填补国内外此种新型电机产品研制开发和质量检验测试的技术空白。

This method can make sure the structure radiant sound status in total noise and the detail phonate part quickly and correctly.(3) Study on the control mechanism of structure noise radiated from rotary machines, we build a common model of rotary machine structure noise analysis relied on the general characters of rotary machines. Based on this model, we analyzed various influence factors to structure radiant noise using the union of revolution and numerical calculation method. We found that the joint stiffness between the rotor and the frame is the most sensitive parameter of structure radiant noise by calculating and analyzing.

根据本文对于旋转机械结构噪声控制技术的研究结果和惯性振动筛工作的特殊要求，对有关参数的选择进行了讨论，并通过试验为降低惯性振动筛噪声找到了两个新的方法：即，在轴间相对运动要求不高的情况下，可以在激振器与筛体之间安装一组减振器，通过适当选取减振器参数，既可以使机体在工作频率附近获得稳定振幅，保证振动筛正常工作，又可以使机体的高频响应减小，降噪效果显著；反之，如果轴间相对运动精度要求(来源：1aABC论文网www.abclunwen.com)较高，可以采用空心滚动体轴承，在保证滚动体强度的条件下也可以获得较好的降噪效果。

In the other hand,Science had hastened Zheng Zhen Duo's literature research method,romantism had hastened Zheng Zhen Duo's literature ontology and independent literature thoughts.

另外科学主义催生了郑振铎的文学研究方法，浪漫主义则催生郑振铎的文学本体论和文学独立观，郑振铎还初步提出了文艺学学科的构想。

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