查询词典 refracted ray

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。

Data in the gamma-ray band were acquired by the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope, while the radio rotational ephemeris used to fold gamma-rays was obtained using both the Green Bank Telescope and the Lovell telescope at Jodrell Bank.

伽玛波段的数据来自于Fermi伽玛射线空间望远镜上的大面积望远镜的观测，用于折叠伽玛射线数据的射电旋转周期数据来自于Green Bank望远镜和位于Jodrell Bank的Lovell望远镜的观测。

Microscopic characteristics of cladded crystal fiber are analyzed by X-ray diffraction, Laue X-ray diffraction and scanning electron microscopy, it is found that magnesium-ion indiffusion does not affect the single crystal structure and the domain structure of the magnesium diffused crystal fiber. It is found for the first time that MgO-rich layer in the magnesium diffused LiNbO〓 surface layer exhibits the crystal structure of an unknown compound from the Li-Mg-Nb-O ternary system and MgNb〓O〓. It is proposed for the first time that this unknown compound and MgNb〓O〓 in MgO-rich layer are the real sources of magnesium-ion indiffusion LiNbO〓. Their appearance indicate that MgNb〓O〓 is in the surface layer of MgO-rich layer, the unknown compound is in the subsurface layer and beneath where the MgNb〓O〓 is located, and these compounds have obviously preferred orientation.

通过镁离子内扩散法，首次在国内实现了具有阶跃和抛物折射率分布的c轴LiNbO〓单晶光纤和a轴Nd：MgO：LiNbO〓单晶光纤的芯—包层波导结构，为我国在该项目的研究填补了空白；建立了晶纤损耗的测量系统，提出了利用单模石英光纤作为晶纤入射光耦合器的思想；通过对晶纤损耗的测量，得到了包层晶纤比未包层晶纤损耗降低约14倍的好结果，并实现了低次模传输：对经镁离子内扩散实现包层后的晶纤的微观特性，利用X射线衍射，劳厄照相和扫描电镜表征发现，晶纤并不因镁离子的内扩散而影响其单晶结构和镁的扩散层畴的变化。

He then laid a photographic plate behind his wife's hand, and made the first X-ray photo.

那后他放了一张底片在他妻子的手后，制作出了第一张X光照片。

Allison Abbate, Colleen Atwood, John August, Rick Baker, Helena Bonham Carter, Felicity Dahl, Johnny Depp, Danny Devito, Danny Elfman, Carlos Grangel, Ray Harryhausen, Martin Landau, Rick Heinrichs, Christopher Lee, Lindsay Macgowan, Shane Mahan, Ian Mackinnon, Alex Mcdowell, Victoria Price, Ken Ralston, Paul Reubens, Deep Roy, Winona Ryder, and Richard Zanuck.

阿利森阿巴特，科琳阿特伍德，约翰奥古斯特，瑞科贝克，海伦娜邦汉卡特，富临达尔，约翰尼德普，丹尼德维托，丹尼叶夫曼，卡洛斯Grangel，雷·哈里豪森，马丁兰道，里克海因里希斯，克里斯托弗李，林赛麦高恩，巴蒂尔马汉，伊恩麦金农，亚历克斯道尔，维多利亚价格，拉尔斯顿，保罗鲁宾斯，深罗伊，薇诺娜瑞德，和理查德扎纳克。

Using X-ray ablative self-similiar solution, the scaling law for plasma expansion effect on transport is obtained.

利用X光烧蚀的自相似解，得到等离子体对输运产生影响的定标公式。

Objective:To improve the understanding of X-ray manifestations of chronic renal failure with heart abnormity.

目的 ：为了提高对慢性肾衰心脏异常X线表现的认识。

Continuously improve the production mechanism, to provide customers with better quality products and services.

不断的完善生产机制，给客户提供更优质的产品及服务。

B:Yes, he was the very prize-winner in the court tennis ten years ago?

是的，他是十年前的世界网球冠军。