查询词典 Devil ray

The compound high-energy X-ray lens is a kind of novel refractive X-ray optical device.

高能X射线组合透镜是一种基于折射效应的新型X射线光学元件。

The X-ray compound lens is a novel optical device that focuses X-ray radiation by refraction effect.

X射线聚焦组合透镜是一种利用折射效应对 X射线辐射聚焦的新型元件。

The X-ray compound lens is a novel refractive X-ray optical device.

X射线组合透镜是一种利用折射效应对 X射线聚焦成像的新型元件。

The compound X-ray lens is a novel refractive X-ray optical device.

铜材料 X射线聚焦组合透镜是一种基于折射效应的 X射线聚焦元件。

We firstly studied the material feature in X-ray band. Base on this, we defined the diffractive screen function. Subsequently, by using diffraction theory, it studied the focus performance and transmission efficiency of X-ray compound lens.

1理论研究。首先研究了X射线波段的材料特性，并据此得出了物面的衍射屏函数，然后利用衍射理论研究了X射线组合透镜的聚焦性能和透射效率。

Then the experimental setup for the focusing performance is described, and the focusing performance of the PMMA compound high-energy X-ray lens is tested under the inradiation of the 8 keV monochromatic X-ray.

最后给出8 keV单色X射线辐射下，PMMA材料X射线组合透镜的聚焦性能的测试结果，对实际测试结果进行了分析和讨论，得出结论，焦距等参量与理论计算结果基本吻合。

This paper introduces the studies of the ultra-short Thomson scattering X-ray source at the accelerator laboratory of Tsinghua University in recent years. Properties such as the photon yield,the pulse length and time jitter of the produced photon pulse were predicted theoretically from the parameters of the electron bunch and the laser pulse,and the scattering angle. Preliminary experiments were successfully carried out with a 16 MeV backward-traveling-wave accelerator and the ns-Q switched laser provided by China Academy of Engineering Physics. This paper also introduces the 1.6-cell electron gun that was fabricated on site and the experiment with high RF power including the measurement of the electron bunche parameters. Based on these,we have designed an X-ray source,which is now under construction.

介绍了清华大学加速器实验室近年来关于汤姆逊散射超短X射线源的研究工作；研究了在任意散射角度下电子束参数和激光束参数对散射光子参数的影响，给出了散射光子的参数如光子产额、脉冲长度、时间抖动等与电子束参数、激光束参数和散射角度的关系；利用实验室已有的16 MeV反波行波加速器与中国工程物理研究院激光聚变研究中心提供的ns调Q激光搭建了汤姆逊散射初步实验平台并开展了实验研究；加工了1.6-cell光阴极微波电子枪，搭建了高功率实验平台，对产生的电子束参数进行了初步测量；对汤姆逊散射超短X射线源进行了设计并开展了相关的平台建设工作，对产生的X射线脉冲参数进行了模拟。

Recently, its research and development projects consist of the production of CT X Ray tubes and high speed rotating anode x ray tubes.

上海医疗器械九厂近期开发与技术改造项目有：研制全身 CTX线管填补空白l(2)研制高速旋转阳极X线管。

Its main products include: medical X ray tubes, image intensifier tubes and rotating anode X ray tubes etc., which are all in conformity with the national standards and registered with the "Yuan Xing" trade mark.

主要产品有：医用X射线管、影像增强管、下球管等，均执行国家技术标准，以&元星牌&为注册商标。

Using the Fermat's principle,the paper presented a fast and effective ray tracing method-ray tracing with minimum time.

石油地球物理勘探，2 0 0 2 ，37(5 )：4 5 5～ 4 5 9 本文利用费马原理提出了一种快速、有效的射线追踪方法——最小时间射线追踪方法。

He became prime minister in 1997 and won international acclaim for his role in the Northern Ireland peace process.

他在1997年成为总理，并且因为在北爱尔兰的和平进程中发挥的作用受到国际社会的赞许。

Mixed Page Sorting Method Using the cuttable user model, this thesis proposes a mixed page sorting method by using cutted user model in server-side and complete user model in client-side.

隐私分级利用的混合式页面排序方法针对个性化搜索中搜索结果排序的问题，本文利用隐私可控开放的用户偏好模型，提出一个在客户端和服务器端分步进行的隐私分级利用的混合式页面排序方法。