查询词典 cathode ray

The former consists of LaBe crystal cathode, Wehnelt grid and an accelerating anode, and the latter is comprised of two equal radius concentrating cylinder electrodes.Its well known that the x-ray radiation emitted by electron-beams acting on metal target surface has well developed for about 100 years.

LaB_6电子枪发射的电子束经过静电聚焦系统，被会聚为微米级的电子束斑，该微束斑电子束与固体金属靶相互作用，产生出微束斑的X射线，从而形成微束斑X射线源。

The fabric after arranging applies function test to make clear, absorbefacient has the ultraviolet ray of preparation to prevent ultraviolet sex admirably to be able to be mixed be able to bear or endure catharsis function, via 50 catharsis hind, of fabric fight ultraviolet exponential reservation leads prep above 90%, and the change of physical machinery performance that arranges around fabric is minor, for absorbefacient of a kind of admirable reactivity ultraviolet ray.

整理后织物应用性能测试表明，制备的紫外线吸收剂具有优良的防紫外线性能和耐洗涤性能，经50次洗涤后，织物的抗紫外指数保留率高于90%，且整理前后织物的物理机械性能变化较小，为一种优良的反应性紫外线吸收剂。

To make paper more systematic and practical, this paper has first introduced the development history of CT equipment, then, elaborate construction of system and theworking principle of CT equipment systematically, including the property of X-ray, the absorption law of X-ray for materials, the reconstruction principle of CT image, the structure of software and hardware for CT equipment. Finally, with 2 CT systems that we used, statistic and analysis of all the malfunctions which have carried out in passed 10 years was given, and according to the systematic parts of fault located, classify the malfunctions, then elaborate their working principle one by one, analyze the regularity and the characteristic of each malfunction, and put forward specific prevention method and measure for the malfunction.

为了使论文更具系统性和实用性，本论文首先介绍了CT设备的发展史，然后比较系统地阐述CT设备的工作原理及系统结构，包括X射线的特性和物质对x射线的吸收规律，CT图像的重建原理，CT设备的软、硬件结构等，最后以我们所使用的2台CT为例，对10余年来所出现的故障进行了全面的统计分析，并按故障所处的系统部件进行分类，然后逐个阐述其工作原理，分析其故障的特点和规律，并就这些故障提出具体的预防方法和措施。

This method is based on the Snell law of acoustic propagation in water. Different velocity gradients among linear layers in water are utilized to draw the sound ray chart, and a mathematical model of the geometric operational range is built. Furthermore, the geometric homing range is predicted with sound ray density, a prediction system of geometric operational range for acoustic homing torpedo is designed and the function of the system is realized through a system software. The sea trial demonstrates the prediction validity of the system.

该方法基于声波在水中传播的Snell定律，利用水中各线性分层间不同的声速梯度，绘制声线图，建立了几何自导作用距离的数学模型，并通过声线密度对几何作用距离进行预报，设计了声自导鱼雷几何作用距离预报系统，并通过系统软件实现了其功能，经测试，该系统在海上试验中取得了良好效果。

When surface alpha ray flux of granite are higher than 0.0052Bqcm〓, radionuclides gamma ray analyses must be done to determine if their internal and external indexes are in the range of'A'limits of national criteria of China.

3.1 花岗石的表面α筛选值本论文得到的花岗石的表面α水平与外照射指数的拟合关系为： I〓=0.2802+181.3α-1614α〓从拟和曲线可得：当花岗石的表面α水平低于0.0052 Bqcm〓时，内外照因子都在国家标准GB 6566-2001对A类饰材的的限制以内。

It is important that studying gamma ray spectrometry of field rocks and soil in the earth抯 crust. Their energy range are mainly 30-3000keV, they contain abundant information of natural radioactive nuclides, such as uranium, thorium, potassium, etc, and of artificial radioactive nuclides from nuclear engineering activity, such as cesium, americium, cobalt, etc, and of the results in interaction between gamma ray and earth抯 crust.

国外近年已经生产出大于256道的伽玛射线能谱仪，但由于仪器应用滞后于仪器研究，且仪器稳谱未完全解决，获取全谱信息困难，加之对低能谱段的认识不足等原因，致使野外应用仍然滞留在仅限于测定铀钍钾含量的伽玛能谱测量水平上。

With authorised promulgation of V-Ray for Amerind in August 2009 V-Ray performance solutions addicted their ikon of vital agency that is ever there support artists alter modify the most enterprising fictive visions into actuality for both inferior instance and modify outlay without sacrificing quality.

Vray Maya在2009年8月Vray渲染解决方案，确认了他们不可缺少的工具，就是始终有帮助艺术家转化为更少的时间和更低的成本，即使是最雄心勃勃的梦想变为现实的创造性不牺牲质量的图像。

The unit cell parameter of polypropylene crystallized with different method and condition was studied:curves of wide angle X-ray diffraction are determined by stepwise scanning method,X ray multi peaks resolution program and simulation program of unit cell parameter developed by the general inverse matrix method are used as data processing of determined results.

研究了不同方式和条件下形成的等规聚丙烯结晶的晶胞参数，用步进扫描测定试样的宽角X-射线衍射，用广义逆矩阵法编的计算机分峰程序和晶胞参数拟合计算程序对测定结果进行计算和数据处理。

Refraction regularity of extraordinary ray in uniaxial crystal with arbitrarily oriented optical axis;2. In the case of optical axis of uniaxial crystal being parallel with the incident plane, the angle of refraction of extraordinary ray are calculated by using Fermat's principle.

在单轴晶体的光轴与入射面平行的情形下用费马原理计算非寻常光光线的折射角，然后就怎样定义非寻常光作些讨论，最后在单轴晶体的光轴任意取向的普遍情形下给出计算非寻常光光线折射方向的公式。

Detailed contents are given as follows:(1)In views of the x-ray laser target chamber on the SG-II high-power laser facility and the experimentally physical demands, the key influencing factors, such as the elliptical eccentricity and the spectral detection angle, on the angular dispersion, the spectral resolution,and the photometric parameter were studied by the elliptical self-focusing geometric principle. In order to increase the spectral and spatial resolution, using ray tracing code and optical path function, optimization calculation was carried out for an elliptical crystal spectrometer.

进一步以此为核心开发出了一种新型的X射线测量与诊断系统，取得了一些新的科研成果，可为王王淦淦昌昌院士、王大珩院士二老倡导研制成的用于国防科研、激光惯性约束聚变、强激光与物质相互作用、X射线激光等物理研究的大型钕玻璃高功率"神光II"激光装置上的物理实验提供更有效的诊断X射线谱手段，扩充了其应用范围，也对激光等离子体辐射keV以上能区段的X光发射和吸收的原子物理过程与机制、占据动力学、谱形态结构等方面做了深入一步的理论和实验研究。

The quality of both red and white wine depends very much on the wine maker talent and on the quality of the grapes.

他的红酒和白酒的品质，根据酿造者的能力和葡萄的质量，各有差异。

No, I don't want to get drunk before my next match.

" "不，我不想让我的下一场比赛前喝醉了。