查询词典 gammar radiation

Anti-nuclear groups held protest vigils for the 30th anniversary of America's worst nuclear power plant accident. A small amount of radiation was released into the air of Three Mile Island in 1979. No nuclear power plants have been built in the US since then.

为了纪念美国30年前最严重的核电厂事故，反核能组织举行了一场通宵抗议活动。1979年，少量的放射性物质泄露到Three Mile Island空气中，自从那次事件之后，美国再没有建造任何核电厂。

Radiation from a fiber coupled diode (core diameter 0.4 mm, N.A. 0.3) is coupled into Tm5% at.,Ho(0.5% at.∶GdVO4 crystal by a pair of achromatic lens for end pumping. Output power of 3.6 W at 2.048 μm is obtained under pump power of 14 W and emission wavelength of 794 nm. The optical-optical conversion efficiency is 25.7% and slope efficiency is 26.6%.

在液氮制冷晶体条件下，利用光纤耦合激光二极管及消色差光学耦合系统端面泵浦双掺5％Tm，0.5％Ho∶GdVO4晶体，在泵浦功率14 W、泵浦波长794 nm时，实现了2.048 μm激光输出，连续运转输出功率3.6 W，相应的光光转换效率为25.7％，斜率效率26.6%。

Objective To probe into the feasibility of synthesizing acetylsalicylic acid under mcrowave radiation condition.

作者：作者：安琳，刘毅，张晓萸作者单位：徐州医学院药学院，江苏徐州221004 来源：医学期刊/大学学报收藏本文章

Methods According to the theory of Cerenkov radiation, different counting medium and condition on 32 P were studied.

方法根据契伦科夫辐射的原理，对各种有闪烁液和无闪烁液测量介质和测量条件进行对比实验研究。

A beam profile diagnostic system of high current, short pulse electron based on Cerenkov radiation is introduced.

介绍了一套基于切伦科夫辐射的、用于强流短脉冲电子束束剖面测量的装置。

Cerenkov radiation ;"double imaging" method ; RMS emittance ; image processing ; computer simulation

切伦科夫辐射；&双成像法&；均方根发射度；图像处理；计算机模拟

Cerenkov radiation signals produced by thin quartz foil placed in the beam path are detected with streak camera.

装置利用扫描相机记录背面打毛的石英玻璃薄片中产生的切伦科夫光信号。

Experiments confirming Cerenkov radiation and time resolved beam profile measurement are realized with this system on the 2MeV injector of CAEP.

使用该装置，在中国工程物理研究院流体物理研究所的2MeV注入器上进行了切伦科夫光的验证实验和时间分辨的束剖面测量实验。

It is because of Cerenkov effect "electromagnetic radiation emitted when a charged particle passes through an insulator at a speed greater than the speed of light in that medium"

正是因为切伦柯夫效应&当带电粒子穿过透明介质时，如果它的速度超过了光在介质中的速度时，会沿一定方向发射可见光。&

Such distinct constitutive parameters have brought the medium several quite unique electromagnetic properties, such as negative refraction, reversed Doppler effect, reversed Cerenkov radiation, etc.

其独特的本构参数给予了这种介质独特的电磁特性，比如负折射、逆多普勒效应、逆？

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。