查询词典 geometrical optics

In order to overcome this problem, in this paper, the surface electric current of the conducting sea surface and the first-order scattering from the conducting plate are obtained by employing Physic Optics method. The backscattering field of the time-dependant sea surface is calculated by using Kirchhoff Approximation. Meanwhile, taking the advantage of a newly developed technique that utilizes the reciprocity theorem, the difficulty in formulating the secondary scattered fields from the composite target is reduced. The dependences of the backscattered field on the parameters, such as the wind speed and the sizes of the plate are discussed.

为了克服这一问题，本文应用物理光学近似求解了导体海面表面电流及导体平板的一阶散射场，应用基尔霍夫近似给出了海面的后向散射场，同时借助互易性定理降低了求解平板和海面之间二次耦合散射场的难度，讨论了平板尺寸、风速等对后向复合散射场的影响。

Based on the above results, the problems of the electromagnetic interaction between a perfect conducting plate and 1-D/2-D conducting slightly random rough surface and the problems of the electromagnetic interaction between a dielectric spherical particle and dielectric slightly random rough surface are investigated. By using the reciprocity theorem, Small Perturbation Method and Physical Optics approximation, the solution for the composite scattering field from the composite target is derived and evaluated, and the numerical results are discussed and analyzed.

在此基础上，用互易性原理分别研究了一维、二维导体微粗糙面与其上方金属导体平板目标的复合电磁散射及介质粗糙面与其上方球形粒子的复合电磁散射，结合互易性原理和粗糙面散射微扰法及物理光学近似导出了复合散射场的计算公式并进行了数值计算，对计算结果进行了讨论和分析。

Based on the vector law of refection in optics, the scanning error′s academic formula is educed.

分析表明，用激光及其扫描装置建立光学基准面时，扫描误差是不可避免的，这种误差不加补偿，则最终将引入基准光学平面影响基准精度，进而降低参数的评定精度；借助于所推导的误差补偿公式，是可以补偿这种误差的，这对于建立高精度的扫描基准平面具有理论指导意义。

Newton invented calculus, gave the general formulation of the laws of mechanics that today carry his name, discovered the law of universal gravitation, solved the dynamical problem of planetary motion, invented the reflecting telescope, and made the first systematic investigations in optics and spectroscopy.

牛顿发明微积分；他赋予力学定律普遍公式，至今仍沿用他的名字来称呼；他发现万有引力定律，解答行星运动的动力学问题，发明反射望远镜，并且是首位有系统的探究光学与光谱学的人。

This is piece of thesis involves the lightweight technology of space optics reflector.

这是一篇涉及空间光学反射镜轻量化技术的论文。

With the development of Tissues Optics, the concept of refractive index of biological tissues also evolved continuously.

随着组织光学研究的深入，生物组织折射率的概念也在不断地完善和发展。

The relationship between residual servo variance and control bandwidth of an adaptive optics system is discussed.

分析自适应光学系统的控制残余方差与控制带宽的关系。

Analysis of the residual servo variance for an adaptive optics system.

自适应光学系统的控制残余方差分析。

The conductivity and respire intensity of mycelium treated by T. aureoviride metabolite were also changed. Changes of mycelium and cell wall of the pathogen were observed through optics microscope and TEM.

经黄绿木霉菌代谢产物处理的菌丝电导率与呼吸强度均发生变化，在光学显微镜与透射电镜下观察到病原菌菌丝体发生变化，细胞壁有所改变。

The company has an advanced ophthalmic optics and optical examination apparatus cold, copy reticle design and development team.

公司拥有一支先进的眼科光学诊察器械及光学冷加工、分划板复制设计开发队伍。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。