查询词典 light-year

If two nondiffracting beams with small difference of convergence angle and common axis exist at same time, they will interference with each other to form a light field structure that varies periodically along the propagation direction. It is a new kind of space distribution of light beam.

如果两束汇聚角略有不同的同轴无衍射光同时存在，则它们相互之间叠加干涉后产生一种纵向呈周期变化的光场结构，这是一种新的光束空间分布，这种光束在横向仍是一种同心环光斑，可用于精密对准。

The lens has a section in a plane normal to a longitudinal axis of the lens, in which a surface of the lens facing the light source has a curved line that expands or is convexly facing toward the light source.

所述透镜在与透镜的纵向方向垂直的平面上具有截面，在该截面中，透镜的面向线光源的表面具有朝向光源扩张的曲线。

Some key problems of line structured light sensor is given comprehensive studies theoretically and practically, which include the analysis of sensor's mathematic model; the improvement of the key parts of the sensor, the light source and imageforming system; the method of on-line measurement and the evaluate of BGA coplanarity. These studies are supported by corresponding satisfactory experiments. This dissertation covers the following aspects concerning the main work and creative research in the subject: 1. The operating theories and features of pattern measuring methods are systematically introduced.

本文成功地将线结构光传感器应用于BGA芯片管脚共面性的在线测试，并针对线结构光传感器测量的一些关键问题进行了深入细致的研究和探讨：建立了线结构光传感器的模型并对结构参数进行了详细的分析，针对传感器的关键环节—光源和成象系统的改进都提出了创新性的理论和方法，对管脚形状比较复杂的BGA芯片球栅阵列的在线测试方法和评定方法进行了理论研究和实验分析，并获得了满意的结果。

This paper indicates,through talking about the historical process and debates of the establishment of light corpuscle theory and light fluctuation theory,that physical hypothesis plays a pioneering,bridging and promoting function.

通过评价对光微粒说及光波动说建立的历史过程及它们的争论，说明物理假说在物理学发展过程中的先导和桥梁作用以及推动作

Bradley explained this effect in the context of Newton's corpuscular theory of light, by showing that the aberration angle was given by simple vector addition of the Earth's orbital velocity and the velocity of the corpuscles of light (just as vertically falling raindrops strike a moving object at an angle).

布拉德利解释这种效应的背景下，牛顿corpusculartheoryoflight，经表明像差角度作了简单的载体，增加了地球的轨道速度与速度段体轻(就像垂直下落雨滴罢工运动物体的夹角)。

I should like to see how your theory, even if we waive the difficulties, explains those phenomena which are so clear and understandable in the light of the corpuscular theory. Take, for example, the fact that light rays travel in vacuo or in air along straight lines.

即使我们撇开那些困难，我还想知道你的理论如何去解释那些被微粒说解释得很明白而容易理解的现象，例如光线沿直线在"真空"或空气中通过的情况。

First of all, this paper selected a wide range of spectral response, short response time, photoelectric conversion efficiency, pn junction area of silicon photovoltaic cells, as the light meters photoelectric conversion of the probe, and it creates a separate probe light and increase to the filter and cosine amended, and separated from the fuselage, better adapted to the cosine law and improve the measurement accuracy and scope.

首先，本文选用了光谱响应范围宽，响应时间短，光电转换效率高、pn结面积大的硅光电池作为光照度计的光电转换的探头，并把它做成一个单独的光探头，并加了以v滤光器和余弦修正器，与机身分离，更加适应余弦定律，提高了测量的精度和范围。

The melting is done by raising the frequencies of light to the level of Solar Aqualene Light energy, Cosmic Energy and Star Dust Energy.

熔化是通过提高频率的光的水平太阳能Aqualene光能，宇宙能量和星除尘能量。

"They'll still be out there," says cosmologist Professor Lawrence Krauss of Case Western Reserve University ."But space will be expanding faster than the speed of light," and so the light from those galaxies will never reach us again.

凯斯西储大学的宇宙学家劳伦斯·克劳斯教授说："那些星系团还在，但是空间膨胀的速度比光速还快，因此那些星系团的光线将永远无法到达我们地球。"

The spectral and intensity reaction from the cotton boll worm moth were measured by using phototaxis behaviour method, at 14 monochromatic light selected through 340nm to 605nm and white light.

运用室内行为实验方法研究了不同波长单色光和白光刺激的棉铃虫HelicoverpaarmigeraH櫣bner）］成虫趋光、避光反应及其与光强度之间的相互关系？

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。