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Focusing properties of elegant cosh square Gaussian and Sinh square Gaussian beams through a thin lens are studied in detail. And intensity distribution on the axis and focusing intensity distribution are analyzed. Also focal shift of Sinh square Gaussian beams are studied.

详细研究了复宗量双曲余弦平方-高斯光束和双曲正弦平方-高斯光束通过薄透镜时的聚焦特性，分析了光束的轴上光强分布和聚焦场的光强分布，讨论了双曲正弦平方-高斯光束的焦移。

First we studied the effect of skatole on activity of a-amylase pepsin and trypsin, then we studied the effect of skatole on structure of three important digestive enzymes by UV spectra and fluorescence spectra.

本文首先研究了粪臭素对α-淀粉酶、胃蛋白酶及胰蛋白酶活性的影响，接着通过紫外光谱法和荧光光谱法进一步研究了粪臭素对这三种重要消化酶结构的影响。

It was in America that I studied English and it was also in America that I studied Spanish.

我是在美国学的英文，也是在美国学的西班牙文。

The following are the major work in this thesis which has been studied and still needs to be studied further in the future: 1 An improved adjoint variational method is developed, thus it can be applied to the LAGFD-WAM Wave Numerical Model for data assimilation; 2 A linear evolution equation of spectral perturbation is derived in order to analyze its increasing or decreasing mechanism.

本论文主要完成了以下几个方面的研究： 1）建立了推广形式的共轭变分同化方法，使之能够应用于LAGFD-WAM海浪数值模式； 2）导出了扰动谱线性演化方程，分析了扰动谱增长、衰减机制，考察了涌浪情况下扰动谱的持续时效问题及风浪情况下扰动的演变过程； 3）利用波谱共轭方程初步分析了同化模型中距离泛函的敏感性及敏感区域空间分布； 4）将推广的共轭变分方法应用于海浪谱能量平衡方程，建立了连续形式的海浪同化模型，特别是严格导出了风输入、破碎、底摩擦、波波非线性相互作用和波流相互作用各源函数的共轭源函数表示式； 5）分别进行了波谱层次上和有效波高层次上的同化试验，并对数值结果进行了分析。

Its dispersive mechanism was studied briefly with infrared spectrography. The effects of different pH value and SAF dosage on the sedimentation behavior of SiC in the slurry were studied using 10﹪ polyvinyl alcohol water solution as a medium.

通过红外光谱，简要分析了SAF的分散机理，并以含10﹪聚乙烯醇水溶液作为分散介质，研究了不同用量SAF和不同pH值对体系沉降性的影响。

On the basis of the FEM simulation results, the forming mechanism of tube stagger spinning is studied. The studied mainly include the stress and strain distribution law, the influence of key process parameters on the spinning forces and diameter dimensions, and the main simulation defects.

主要的工作包括：应力应变分布规律研究；关键工艺参数对旋压力、内径尺寸精度的影响规律研究；以及对旋压模拟中的损伤缺陷、不贴芯模缺陷和隆起缺陷的产生原因和防上措施的研究。

Combined with the financial futures theory , accounting of corporation engaged in IRFs is further discussed .And four kinds of IRFs transaction including speculation , spread , arbitrage and hedge are studied in detail. Accounting of arbitrage and accounting of spread , which are often ignored by most research on the derivative financial instruments accounting , are also studied .

对利率期货投资企业会计，在现有衍生金融工具会计的研究中，大多对套利交易、套购交易会计问题采取存而不论的态度，本文按照交易方式将利率期货交易进一步分为利率期货纯粹投机交易、套利交易、套购交易和套期保值交易四部分进行了尝试性的讨论。

The changes of morphology and mass in the process of pretreatment, the morphology and the phase constitution of chemical conversion film formed by stannate were studied using scanning electron microscope, X-ray diffraction and the mass loss method. The corrosion resistance of film were studied by salt spay test and damp test.

利用扫描电镜、X射线衍射和质量损失等手段，研究预处理前后的表面形貌及质量变化和锡酸盐化学转化膜层表面形貌及其相组成，采用盐雾和湿热实验箱检验膜层的抗腐蚀性能。

The fluorescence properties of DAKGM solutions were studied in detail.The fluorescence properties of DAKGM solutions were studied via steady fluorescence spectra. Two emission peaks appeared at 425 and 465 nm, respectively.

过渡金属离子Fe3+和Cu2+能显著降低KGM的荧光强度，根据Stern-Volmer方程得到了Fe3+和Cu2+对KGM的淬灭常数分别为203.8 L/mol和171.0 L/mol.3、系统地研究了醛基葡甘聚糖溶液的荧光光谱特性。

The main content of this thesis is as follows: 1The structures of EPS are analyzed. The main components of EPS are introduced in detail. Then the distributed torque in EPS is analyzed and the control system model is set up. 2Three control modes are discussed and the control strategy of EPS is studied in detail. Three principal modules in the control strategy are discussed—the predicted module which predicts motor rotational speed and steering rotational speed, the power-assistant module and the return control module. 3The assistant torque curves of the motor are designed by using the B-spline, so that any kind of custom-built assistant torque curves can be designed according to different kinds of automobiles. 4The hardware frame of EPS is studied. The developed controller based on 8-bit MCU MC68HC908MR8 is introduced and many related circuit units are designed, including the control circuit, the driver control circuit and so on. The software structure is discussed, then the steering control program flowchart is given.

本文的主要工作有： 1分析了EPS 的总体构成，对EPS 的各个部件作了详细的介绍，并在此基础上分析了EPS 的受力情况，建立了控制系统模型，并研究了EPS 的安全性能； 2讨论了EPS 的三种控制方式，提出了控制策略，并讨论了其中三个关键模块的作用：预估模块包括对电机转速和方向盘角速度的预估，助力控制模块以及回正模块； 3用B 样条插值方法进行EPS 助力曲线的设计，可按照用户的要求设计任意形状的助力曲线，以满足不同车型和不同用户的要求； 4研究了控制系统的硬件结构，以MC68HC908MR8 为核心设计了控制器，详细讨论了控制器的控制电路、驱动电路等；设计了控制系统的软件，给出了控制程序流程图，并对要点进行了详细的说明。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了