振

There are usually several vibration modes participating in heliostat's response to wind induction. The complete quadratic combination method can take the modes' coupling effect into account. The result is precise, however the computation work is heavy. Therefore, the proper orthogonal decomposing stochastic wind field was proposed to be applied in computation of heliostat's response to wind induction.

定日镜结构风振响应中有多个振型参与，利用完全二次型组合法可以考虑各振型间的耦合作用，得到精确结果，但计算量很大，因此提出将随机风场本征正交分解技术运用到定日镜结构响应计算中。

Its performance determines the security and cosiness of train. With the advancement of railway'speed, the self-made hydraulic damper can't satisfy the requirement of high performance hydraulic damper.

由于铁路的提速和城市轨道交通的迅速发展，凸显出对高性能液压减振器的需求，但国内生产的液压减振器还不能满足这种需求，这种状况是由于减振器试验设备落后造成的。

To compare with former works, it has following characters: 1. On the first time, theoretically analyze the principal and aspect of the depolarizer, which is an important component of D-IFOG.

与前人的工作相比，本文的特点在于： 1，首次利用Jones矩阵理论系统地研究了作为消偏干涉型光纤陀螺的关键器件的光纤消偏器的工作原理及工作特性，推导出偏振度与各有关参数之间的函数关系，明确了各参数在偏振度中所占的比重，首次设计出制作这一器件的实验系统，并制作出偏振度为1.0％的光纤消偏器。

By adding Polarization Maintaining Fiber on output terminal of SLD and Loyt depolarizer behind polarizer , the Degree of polarity can be reduced to 10 -3 ,and influence of outside conditions to light-wave′ state of polarization can be reduced too.

利用在光源出端加单段保偏光纤和在消偏器后端加Loyt消偏器，可以使进入光纤线圈的光的偏振度降到10-3数量级，降低了因外界因素对线圈中光偏振态的影响而产生的光纤陀螺偏振误差。

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Based on these, the polarization sensitivity model and software of space remote sensor are established, by using the method of polarization ray tracing. Applying the model and software, the linear polarization sensitivity of the Moderate Resolution Imaging Spectroradiometer and the dichroic system are calculated and analyzed.

在这个基础上，利用偏振光线追迹的方法，作者建立了航天遥感器的偏振灵敏度模型及相应的软件；并利用遥感器的偏振灵敏度模型及软件对中分辨率成像光谱仪总系统以及分色镜系统的线偏振灵敏度进行了计算和分析。

It introduces causes of formation of polarization mode dispersion、describing methods in internet and some important concepts about PMD,for example double refraction, coupling, primary polarization state and so on.

介绍了偏振模色散的成因、国际上常用的描述方法以及有关偏振模色散的一些重要概念，如：双折射，耦合，主偏振态等。

Within the 14th time window, all the three tides are generally elliptically rather than circularly or linearly polarized. However, both △(subscript φ24) and △(subscript φ12) in this window are quasi-quadrature at all heights while △(subscript φ8) are quasi-in-phase at 92.0 and 94.0 km.

在第14个时间窗内，三个潮汐一般表现为椭圆振而不是圆偏振或线偏振，但是△(下标φ24)和△(下标φ12)在三个连续的高度上准正交，而△(下标φ8)在92.0和94.0 km上准同相。

Comparing with FWM without dressing fields,the strength of the singly-dressing FWM signal is suppressed when the modulation-field is linear or elliptically polarized.

与非缀饰四波混频信号的强度相比，单缀饰光作用下的四波混频信号的强度在偏振调制光为线偏振及椭圆偏振的情况下受到了不同程度的抑制。

The air flow excitation force of leaf peak clearance evocable by impeller eccentricity is the important part of the air flow excitation force, so the research of it is very important too.

而由叶轮偏心引起的叶顶间隙气流激振是气流激振的一个重要方面，因此，加强透平机械中由叶轮偏心引起的叶顶间隙气流激振的研究也显得非常重要。

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