北京正负电子对撞机,BEPC
1)BEPC北京正负电子对撞机
1.The Large-scale Scientific Facility and the National Goal:A Case Study onBEPC国家目标引导下的大科学工程——以北京正负电子对撞机为例
2.The multiwires proportional chambers (MWPCs) which localize the particles for the e/π test beam on Beijing electron and positron collider (BEPC) are described.描述了北京正负电子对撞机直线加速器附设e、π试验束描迹用的多丝正比室。
3.The Beijing Electron Positron Collider (BEPC) ended its running on July 4th , after 17 years running since the first collision in 1988.从1988年第一次成功对撞起,北京正负电子对撞机经过多年的改进和长达的运行,于 年7月4日正式停机。
英文短句/例句
1.Beijing Spectrometer (BES) is an experimental facility of high energy physics on Beijing Electron Positron Collider (BEPC) .北京谱仪是北京正负电子对撞机上的高能物理实验装置。
2.(Remarks made while inspecting the electron-positron collider in Beijing.)（这是邓小平同志视察北京正负电子对撞机工程时的讲话。）
3.Calculation of Gas Bremsstrahlung for Defense the BEPCII;北京正负电子对撞机气体轫致辐射的计算与防护
4.Study of the Beam Pipe and Its Thermal Controlling System in Beijing Electron Positron Collider;北京正负电子对撞机束流管及其热控制系统研究
5.The Large-scale Scientific Facility and the National Goal:A Case Study on BEPC国家目标引导下的大科学工程——以北京正负电子对撞机为例
6.large electron positron storage ring大型电子正电子对撞机
7.The engineering of the electron-positron collider that we have completed also ranks among the world"s most advanced technologies.我们的正负电子对撞机工程在全世界也是居于前列的。
8.As for the electron-positron collider, first I want to tell you a story.说起我们这个正负电子对撞机工程，我先讲个故事。
9.Research on Structure Design and Finite Element Analysis of the Vacuum Chamber for the Electron Positron Collider s Storage Ring;正负电子对撞机储存环真空室结构设计与有限元研究
10.an accelerator that collides electrons and positrons.正负电子相互碰撞的加速器。
11.proton electron positron colliding beams质子 电子 正电子碰撞束
12.pair attenuation coefficient正负电子对衰减系数
13.In an aerosol containing equal numbers of charged particles of both signs, the diffusive encounters for oppositely charged particles are more effective than for uncharged particles.若气溶胶中含有等量正负带电粒子，那么正负带电粒子间的扩散碰撞比非带电粒子更容易实现。
14.Search for charged Higgs boson at hadron colliders;强子对撞机上荷电Higgs玻色子的研究
15.Linear Dispersion Relation for Electron-positron Plasma in Relativistic Regime相对论正负电子对等离子体色散关系
16.One-loop Electroweak Corrections to Electron-positron Pair Production Via Two Photon Collisions in the SM;标准模型下双光子碰撞产生电子对的一圈弱电辐射修正
17.Beijing Machinery and Electric Equipment Corp.北京市机电设备公司
18.A brief exposition of the policy to be adopted by Beijing Municipal Government to promote the development of E-commerce;试论北京市电子商务发展中的政府对策
相关短句/例句
Beijing Electron Positron Collider北京正负电子对撞机
1.The shortcomings of the radiation monitoring system ofBeijing Electron Positron Collider and the improvements aimed at the shortcomings are summarized in this paper.介绍了北京正负电子对撞机辐射监测系统的改进情况。
2.This paper describes the improvement in the personnel security interlock system ofBeijing Electron Positron Collider.本文介绍北京正负电子对撞机人身安全联锁系统的改进，主要叙述了人身安全联锁的要求和新系统方案的确定。
3.Using BEPC (Beijing electron positron collider) high energy electron beam in Institute of High Physics, new progress in study of radiation hardness properties for detector material was introdviced in the paper.本文介绍了中国科学院高能物理研究所利用北京正负电子对撞机(BEPC)高能电子束对探测器材料抗辐照性能研究的最新进展。
3)BEPCⅡ北京正负电子对撞机
1.Radiation Dose Monitoring and Analysis for the Construction of the Upgraded Beijing Electron-Positron Collider(BEPCⅡ) During Its Storage Ring Operation;北京正负电子对撞机重大改造工程储存环调试运行期间辐射剂量监测与分析
4)BEPCII北京正负电子对撞机II
5)Beijing Electron Positron Collider II北京正负电子对撞机扩建工程(BEPCII)
6)BEPC Ⅱ第二代北京正负电子对撞机
1.The design of the cryogenic system for Beijing Electron Positron Collider Ⅱ (BEPC Ⅱ) has been carried out.低温超导技术将应用于第二代北京正负电子对撞机 (BEPC II)。
延伸阅读
正负电子对形成分子式：CAS号：性质：当光子能量大于两个电子的静止质量(即大于1.02MeV)时，它们与物质相互作用可产生一对正、负电子对，而光子本身则消失。此过程一般发生在原子核附近，有时也能发生在电子附近。负电子与正电子的运动方向差不多与入射光子的方向相一致。
