查询词典 x-rays

In a camera, light rays pass through a series of lenses that focus images onto film.In a healthy eye, light rays pass through the cornea and lens, which focuses images onto the retina, a layer of light-sensing cells lining the back of the eye.

在照相机中，光线经过一系列的透镜，把图像聚焦在胶片上，在健康的眼睛中，光线通过角膜和透镜，把图像聚焦到视网膜上，而视网膜是一层排列在眼底的光敏单元。

The dose enhancement effects and decreasing effects caused by material inhomogeneity were studied quantitatively with a parameter named Dose Perturbation Factor, which was the ratio of the dose at a point in the heterogeneous phantom to the dose of the same spatial location point in the homogeneous phantom. It was showed that the degrees of the dose enhancement or decreasing depended on the energy of radiation, field sizes of the beamlets and compositions of the media. The dose perturbation for high energy X rays is greater than that for low energy X rays. At the same energy condition, the dose perturbation decreased when the field size increased. And the relationship between them was not linear.

模拟结果表明：在小射野情况下，异质组织界面处出现了较大的剂量跃变，剂量扰动效应的强弱程度取决于射线的能量、射野的大小和模体介质的不同等多种因素，高能X射线条件下的剂量扰动效应大于低能X射线条件下的剂量扰动；在入射X射线能量相同的条件下，剂量扰动效应随射野尺寸的减小而增强，并呈现一种非线性关系。

The pupil diameter of different diopters changes greatly under different rays, and it is a very important parameter to measure the pupil diameter in different diopter under different rays before the refractive surgery.

不同屈光度在不同光线下瞳孔直径有很大的变化；不同屈光度在不同光线下的瞳孔直径是屈光手术前评估的一个重要参数。

The maximum entropy principle is utilized to calculate the probability of stochastic rays undergoing k reflections.Finally,the applications of stochastic rays are investigated: the...

最后介绍使用随机射线建模超宽带室内信道的多径传播轨，在此基础上可以得到信道特性建模的基本随机变量，以及无线电波传播的概率模型等应用。

It can also occur if the radiation is in the wavelength range of ultraviolet radiation, X rays, or gamma rays.

如果辐射的波长范围是紫外辐射、X射线或γ射线，也可以发生光电效应。

Rays striking the earth at an angle have to plough through many more miles of atmosphere than rays coming straight down from overhead.

斜射在地球上的光要比头上直射下来的光多经过许多英里的大气层。

The paper presents a new filling-sample method by which the sample quantity filled in a box depends on the energies of γ-rays to be measured. The detection efficiencies of HPGe detector were calculated by using Monte-Carlo method for various γ-ray energies and at various soil sample quantities in a box, and the optimal filling-sample quantities for different-energy γ-rays from radioactive nuclides of 238U, 232Th, 226Ra, 40K, are respectively obtained.

本文提出了样品装量与待测γ射线能量有关联的装样方法，并用蒙特卡罗方法模拟计算了不同能量γ射线的探测效率与样品装量之间的关系，得到用HPGe γ谱仪分析238U、232Th、226Ra和40K等放射性核素活度各自的最佳装样量。

Among all sorts of radiotherapy equipments, linear accelerator fundamentally takes use of electronics rays and X-rays to treat an illness.

在常用的治疗设备中，直线加速器主要是利用电子线和X射线照射靶区来达到治病的目的。

The first profile encloses a Master card that generates between two and six infrared rays and transmits them to a Slave card, placed inside the second profile that has the task of retransmitting the rays received to the Master card, acting as a kind of "electronic mirror".

一侧嵌入发射器，在两侧之间产生六道红外线，投射向安装在另一侧的接收器，再经其返回发射器，类似一种&电子反射镜&。

The Cherenkov telescopes do not actually detect the gamma rays directly but instead detect the flashes of visible light produced when gamma rays are absorbed by the Earth's atmosphere.

只有10 ％的伽玛射线源的非瞬态来源。这些稳定的伽玛射线发射器包括脉冲星，中子星和黑洞的候选人，如活动星系核。

This immediately brings us to the next part of this article: creating an output "replace function".

下面进入文章的第二部分：建立一个"缓存处理函数"。

He was elected as an International Ornithological Committee member in 2002 during the 24th IOC held in Beijing.

现为中国鸟类学会理事和WPA 专家组成员。2002年被推选为国际鸟类委员会委员。