查询词典 ray of light

When propagating light\|ray passes through two fixed points in the gradient index mediums and a cuspidal variable\|point （at this point the trace equation of propagating light\|ray is non\|differentiable） at the borderline of two different GRIN mediums, the mathematical relationship, which the trace equation of propagating light\|ray and borderline equation of two different GRIN mediums should satisfy, is derived by the Fermat's principle and calculus of variation.

当光线通过梯度折射率介质中两个固定点和两个GRIN介质界线上的可动尖点（光线轨迹方程的不可微点）时，由费马原理和变分法运算推得传输光线的轨迹方程与两种不同GRIN介质的界线方程应满足的微分关系式。

Mainly deal with development and production of main diesel engine computer remote control pneumatic remote control electromechanical pneumatic remote control device engine roommouldilization "CAN" sit general circuit atandard communication computer alarm system fogwhistle controller Navigation light signal light controller pressure type liquid level gauge alarmdevice and steal belt type of ray communication level gauge digital display temperature pressure gauge with ray indication and pressure transducer.

上海利智船舶自动化设备技术有限公司是一家集科工贸为一体的高科技公司，主要从事开发，生产，主柴油机的微机遥控；气动遥控；机电气动遥控装置：机舱模块化CAN现场总线制通讯微机报警系统，主机测速装置；雾笛控制器；航行灯、信号灯控制器；压力型液位测量报警装置及测量钢带式光通讯液位仪；数字显示带光指示的温度，压力表及压力变送器等。

This project is to analyze the distribution of the light in the high-power laser system, it bases on principles of ray optical, use the paraxial ray trace and real ray trace , proposes a new data structure and way to simulate the light in the optical system in the computer.

本课题就是以含衍射元件的大功率激光装置中由于多次残余反射形成的鬼像为研究对象，从光线光学的基本原理出发，应用近轴光线与空间光线追迹相结合的技术路线，提出一种新型的分析方法和数据结构，开发出用于含衍射元件的高功率激光系统杂散光分析的软件。

Ray depth specifies the maximum number of times a light ray can be reflected and, or refracted and still cause an object to cast a shadow . Transparent objects between those points in which the ray changes direction will have no affect on the light ray's termination.

光线跟踪深度决定了一个光线在让一个物体产生阴影之前，可以被反射或者折射的最大次数，在光线改变方向的点之间，透明的物体将不会对光线的终止产生作用。

Observation using transmission electron microscopy found the irreversible centripetal movement of chloroplasts in chlorotic plants, as a result occurred in three sequential events:(1) chloroplast positions changed from face position (with long axis of chloroplasts at the cell walls perpendicular to light ray) to profile position (with long axis chloroplasts near the cell walls parallel to light ray),(2) chloroplast shapes changed from long elliptical to circular,(3) chloroplasts were separated from the cell wall and moved to the center of the cell.

透射电镜观察发现失绿叶片中的叶绿体发生不可逆的向心运动，整个过程大致经历以下几个阶段：(1)叶绿体从叶绿体长轴垂直于光线转变至叶绿体长轴平行于光线；(2)叶绿体的形状从椭圆形转变为圆形；(3)叶绿体脱离细胞壁向细胞中心运动。

The algorithm is applied in the segmentation of Magnetic Resonance Imaging of human brain for the 3D reconstruction on dependent of different human tissue structures, in which the problem on wraps between different tissues and fuzzy edges between the different regions in medical volume data may better be settled, which can not be well done by the typical"hard"segmentation using binary logical representation.(3) An accelerated algorithm of volume rendering with X-ray perspective and Phong shading effect based on textures mapping and blending is presented for realizing 3D reconstruction of medical volume data by 2D texture mapping and blending, in which the accelerated algorithm of window transformation is utilized to computing voxels' gray scales and opacities to produce X-ray perspective images, and Phone illumination model is used to import world light sources and an unit spherical surface under the same shading environment as the actual volume rendering is employed to simulate the real reflectional light of per-voxel so that 3D reconstruction possesses illumination effect in the world. Furthermore, 3D matrix transformations of degree rotation and other operations of 3D object are studied, and a fast equivalent method of corresponding shading correction is brought forward to improve its interaction speed in volume rendering process.

该方法利用体数据的窗口变换加速算法将医学体数据转换为计算机显示值，可以得到具有X光透视效果三维图像；该方法提出的Phong明暗处理加速算法利用Phong光照模型引入外部光源，使用一单位球面体来仿真体数据的法线矢量集所产生的反射光强，以快速得到每一个体素的反射光强度，使物体的三维重建达到现实世界中人眼直接观察的逼真效果；此外，还研究了三维重建物体的三维旋转等矩阵变换，提出了一种Phong明暗修正的快速算法来保证了体绘制中三维几何变换的多视角观察的交互速度。

The stabilities of the extract from sanguisorba under different pH, light, heat, ultraviolet ray, oxidant, reducing agent and additive agents were studied. It was indicated the products could widely used in the condition of weak acid or neutral, while they were not stable to heat and light, so they should be used without light and at low temperature. The products had a strong ability to withstand ultraviolet ray. They could easily be oxidized and degraded by oxidant while they were not easily affected by reducing agent and were almost not affected by additive agents. The extract from the stem of sanguisorba was analyzed by UV and FTIR, showing that the structures of the active components were not changed during ultrasonic wave extracting.

研究了pH值、光、热、紫外线、氧化剂、还原剂以及添加剂对地榆提取物稳定性的影响，结果表明地榆提取物适合弱酸或中性条件下使用，使用范围比较广；但对光热稳定性较差，适合在避光低温的环境；具有很强的抗紫外线能力；氧化剂对地榆提取物稳定性影响较大，会加速其降解，还原剂对地榆提取物影响不大；其他添加剂对其稳定性几乎没有影响；并通过UV和FTIR光谱分析，超声波浸提没有对地榆根茎中有效成分的结构发生改变。

The ray from the plasma lamp will go through into the light pipe with little incident angle after reflection by the reflector, and then the total reflection of the ray will occur among the prismatic reflecting films. Some ray may come to the end mirror and will be reflected back, and only a little of rays pass through the prismatic reflecting films, most of the rays will go forward by the action of the bottom light extracting surface and go out to be lighting.

等离子灯球发出的光线经过反射器反射后，以很小的入射角进入到导光管，光线在棱镜反光膜管子内进行全反射，到达丙烯酸树脂管端底镜面的光线，再反射回到管子内部，只有少量的光线透过棱镜反光膜出来，最终大部分光线通过管子底部的光线提取面引出管外，传送到所需要照明的宽广区域（见图7）。

If the belief is a ray of glimmer, we shall hold it in hand, and guard it till the dawn is coming; and if the cause is a blazing torch, we shall hold it up to light the world as a whole.

假如信念是一丝微弱的光芒，我们会锲而不舍的捧着它，守护到黎明；假如事业是一团熊熊燃烧的火焰，我们会高高的擎起它，照亮整个世界

Thirdly, on the basis of the refractive index function around a hot-rolling bar obtained from experiments, the law of the light-ray propagation traces and the light-ray deflection around a high-temperature bar (stationary and in motion, respectively) is studied by the numerical computing of the light-ray differential equations.

作者用光学干涉和热电偶测温法，系统地对直径从35-86mm、壁温从500-1170℃的水平圆柱在自然对流及受迫对流状态下、周围折射率场或温度场进行了实验研究，得到了高温差水平圆柱对流换热的实验关联式。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。