查询词典 optics

Scanning with optics microscope,it was found that only the tips of the needle-shaped steel was destroyed.

电子束质量的好坏对高功率微波源的束波转换效率、微波输出功率和微波脉宽有着重要的影响，评价电子束质量好坏的标准之一是电子束发射的均匀性。

Atmospheric optics ; Aerosol optical characteristics ; Visibility sensor ; Integrating nephelometer

大气光学；气溶胶光学特性；能见度仪；积分浊度计

The numerical simulation of the detection signal was implemented with the theory of diffraction optics, and the numerical simulation of the wavefront reconstruction was realized with Green function algorithm under Neumann boundary conditions.

根据衍射光学理论，对其探测信号进行数值模拟，并利用Neumann边界条件的Green函数法对其波前重构进行数值模拟。

Nanomaterials have many new characterizes which different from the normal materials for their small size, big surface area ratio and quanta dimension domino effect, for examples, the metal with good conductor will be turned into nonmetal when the size is reduced tonanometer levels; the resistance of originally nonconductor will be descended greatly when its size is reduced several nanometers or so, and loss the nonconductor property; the general solid is steady under certain conditions, while under nanometer conditions, the capabilities will be effected greatly by the granule sizes, the newness characteristics made nanomaterials have great appliance foreground on catalyze, optics, and industry produce and so on, therefore the nanomaterials have been the hotspot for materials science, chemistry science and so on.

纳米材料由于尺寸小、比表面积大和量子尺寸效应使它具有不同于常规固体材料的新的特征，如原来是良导体的金属，当尺寸减小到纳米量级时就变成非金属型；原来是绝缘体的物质，当尺寸减小到几纳米或几十纳米时电阻大大下降，失去了绝缘体特性；常规固体在一定条件下物理性能是稳定的，在纳米状态下，颗粒尺寸对性能产生强烈的影响等等，这些新奇的特点使得纳米材料在催化、光学、工业生产等各个方面都有着广阔的应用前景，因此，纳米材料目前已经成为材料科学、物理学及化学等学科的前沿热点。1990年7月在美国巴尔基摩召开了国际第一届纳米科学技术会议，正式把纳米材料科学作为材料科学的一个新的分支公布于世。

The ray theory of geometric optics was applied to visually investigate the propagation of quasi stationary waves in time mean basic flow and interpret the zonal nonhomogeneity.

应用几何光学中的射线理论，直观地讨论了准定常波在时间平均基流中的传播，解释了定常波传播的纬向非均匀性。

The structure of the condenser for soft X-ray normal incidence microscopic optics was completed considering the reflective performance of materials and the techniques of the condenser.

在考虑材料反射特性和实际制作椭球面镜方法的同时，确定了要研制的高分辨率显微成像系统用聚光镜的结构参数。

Laser optics ; smoke screen interference ; numerical simulation ; extinction coefficient

激光光学；烟幕干扰；数值模拟；消光系数

The image collecting parts mainly complete the conversion of the optics photograph to the image that can be treated by the computer. In this step, the pictures of teeth are shot by CCD and store in the compute at the aid of the video collecting cards. The image processing parts realize the geometric transformation, color adjusting, enhancement, measurement and some specially good effects of the collected images. And at the assist of the image processing, the more image information of dental images is exploited, so that the odontologist can diagnose more accurately.

牙科图像数字化主要完成从光学图像到计算机可处理图像的转换，为系统提供可操作的对象，其基本过程可描述为：通过CCD摄像镜头，对实物进行拍摄，由视频采集卡以信息流的形式对信号实时采集、捕捉，以帧的形式缓存，以静态的图像格式存储在计算机中；牙科图像处理部分不仅实现了图像的几何变换、色彩调整、图像增强以及一些特效，而且对牙齿病变部位进行测量，通过这些操作，能够获得更多的图像信息，提高了医生对病情诊断的科学性；牙科病例数据库部分能够浏览病人的基本信息及牙科图片，实现患者病历的添加、删除、修改等操作，建立患者牙科图像档案的图文数据库。

In this paper, a dynamic photoelastic method is applied to investigating the stress wave propagation of projectile ogive under impact load, the dynamic stress state is analyzed, and the dynamic stress values are obtained by applying stress optics law.

用动光弹实验方法研究了冲击荷载作用下穿甲弹风帽模型的应力波的传播过程，对其受冲击后的动应力状态进行了分析，用应力光学定律得到了模型内的动应力值。

The study was published in the May issue of Ophthalmic and Physiological Optics.

该研究在五月出版的《眼科与生理光学》上发表。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。