振

Highly accurate calibration of a polarimeter of the type having at least four detectors involves using four known states of polarisation of an input light signal and at least one further state of polarisation.

具有至少四个检波器的类型的偏振仪的高精度校准涉及使用输入光信号的四个已知偏振态和至少一个其它偏振态。

The emulation result shows that the error of polarizer rotation angle almost does not influence nonlinearity when elliptic polarization of laser beams exists; when the error of rotation angle of polarizing beam splitter exists, the second-harmonic nonlinearity caused by the error of polarizer rotation angle will not increase, but the first-harmonic nonlinearity will increase greatly.

仿真结果表明，当存在激光束椭圆偏振时，检偏器旋转误差对非线性误差的影响很小；当存在偏振分光镜旋转误差时，检偏器旋转误差引起的非线性误差不增加二次谐波分量，但增大了非线性误差一次谐波分量，严重影响非线性误差的大小，当偏振分光镜旋转误差为3°时，检偏器旋转误差从0°增加到5°，非线性误差从0.14 nm增大到0.97 nm。

In response to the relationship between cavitations and wake gradient, this paper puts forward 3 kinds of calculating model of propeller exciting force , then puts the actual exciting force into pattern formula, and then obtains a new formula to predict propeller-induced hull surface pressure fluctuations by analyzing and calculating some actual ships.

在深入研究国内外螺旋桨激振力计算方法以及综合分析影响螺旋桨激振力的各种要素的基础上，根据空泡数和伴流梯度的关系，本文提出三种螺旋桨脉动压力的计算模型，将反推得到的实际激振力分别代入模型公式，应用数学统计方法对几条实船进行计算分析，得到用于预报螺旋桨表面力的新公式。

In this paper, the author sets up the dynamic model of the vibratory extracting-driving piling machine, and carries out the dynamic analysis, parameter calculation and Matlab's simulation for this model. Using the equation reciprocity law to carry out the calculation of soil parameter and simulation, and using the genetic algorithm to make optimization of the machine on the basis of the simulation, the author gets the optimum self-induced vibration frequencies of the machine changing with the depth of the pile and the optimization result of other parameters, thus reaching the conclusion that along with the increase of pile sinking depth, the optimum self-induced vibration frequency becomes bigger, and the vibration mass becomes smaller, hence deepening the knowledge of the dynamic performance of this system.

本文建立了振动沉拔桩机的动力学模型并对这一模型进行了动力学分析、参数计算和Matlab仿真，并利用方程对等法进行土壤参数的计算和仿真，又在仿真的基础上使用遗传算法对桩机进行了优化，从而得出了路基加固振动沉拔桩机随沉桩深度变化而改变的最佳激振频率以及其它参数的优化结果，并得出了随沉桩深度的增加，桩机的最佳激振频率由小变大，最佳参振质量由大变小的结论，深化了对该系统动力学性能规律的认识。

In this paper, the author sets up the dynamic model of the vibratory extracting-driving piling machine, and carries out the dynamic analysis, parameter calculation and Matlabs simulation for this model. Using the equation reciprocity law to carry out the calculation of soil parameter and simulation, and using the genetic algorithm to make optimization of the machine on the basis of the simulation, the author gets the optimum self-induced vibration frequencies of the machine changing with the depth of the pile and the optimization result of other parameters, thus reaching the conclusion that along with the increase of pile sinking depth, the optimum self-induced vibration frequency becomes bigger, and the vibration mass becomes smaller, hence deepening the knowledge of the dynamic performance of this system.

本文建立了振动沉拔桩机的动力学模型并对这一模型进行了动力学分析、参数计算和Matlab仿真，并利用方程对等法进行土壤参数的计算和仿真，又在仿真的基础上使用遗传算法对桩机进行了优化，从而得出了路基加固振动沉拔桩机随沉桩深度变化而改变的最佳激振频率以及其它参数的优化结果，并得出了随沉桩深度的增加，桩机的最佳激振频率由小变大，最佳参振质量由大变小的结论，深化了对该系统动力学性能规律的认识。

A general matrix perturbation method for complex modes using singular value decomposition;2. The modal character,the error of the substituting by real modes and the best way to extract real modes from complex modes are discussed.

建立运动方程，用第一振型将主体结构展开，针对非经典阻尼和非对称结构以及脉动风谱为非有理分式风谱的情况，运用复模态理论将所得方程进行解耦，获得了以第一振型表示的结构随机风振响应的解析解。

Through transforming the vibration isolation system differential combined equations to the state space equation,it is possible to facilitate the solution of vibration isolation coefficient curve of vibration isolation system by using the Matlab/Simulink module.

通过将隔振系统的微分方程组转化为状态空间方程，使用Matlab/Simulink模块可方便求解隔振系统的隔振系数曲线。

For those reasons being listed above , this paper presents a large set of spectral signatures of the polarized reflectance acquired over different agrotype about the soil type, soil granularity and soil water containing with bi-directional reflectance photometer which was invented by engineer Jin^Xinfeng.

文章的第一节是前言；第二节是国内外研究现状；第三节是选题的意义；第四节是仪器和样本介绍；第五节是干土及一定含水量土壤的偏振反射特征；第六节是不同含水量土壤的偏振反射特征研究；第七节是不同粒径土壤偏振反射特征研究；第八节是全文的总结。

The electromagnetic spring with tooth structure is adopted in this paper to adjust the stiffness of isolator, which make the isolator work with different stiffness in different excited frequencies. So the isolation performance is improved as the resonance frequency is eliminated in a broad band.

本文采用齿形结构的电磁弹簧来改变隔振器的刚度，使隔振器在不同外扰频率下变刚度运行，从而能实现在较宽的频带范围内无共振峰，改善隔振性能。

According to the lateral deflection equation of the wall frame-structure ,an exact flexibility matrix is developed first and, then, the natural period and vibration mode of the wall-frame structure is defermined in this paper. According to actual earthquake action, the structural response is calculated with statical analysis.

本文在框架-剪力墙侧移公式的基础上建立结构的柔度矩阵，确定结构的自振周期和振型，采用静力方法按实际的地震作用分布计算结构的作用效应，然后采用振型分解反应谱法对结构进行抗震分析。

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