The levy stability is studied in e~+e~- collisions at Z~0 mass.
对正负电子对撞中Z0衰变能区产生的末态粒子系统的Levy稳定性问题进行了研究,计算出了Levy稳定性指数,得到了该系统自相似的广义分形维数和广义分形谱函数。
The bremsstrahlung in the Beijing Electron Positron Collider (BEPC) is one of the most important projects for the defense of beams in the synchrotron radiation facilities.
针对北京正负电子对撞机(BEPC和BEPCII)储存环直线节结构特点，分析其中残余气体产生的轫致辐射，计算该气体轫致辐射所产生的剂量并提出防护措施。
(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。）
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。
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。
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。
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
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
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
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
large electron positron storage ring
大型电子正电子对撞机
an accelerator that collides electrons and positrons.
正负电子相互碰撞的加速器。
proton electron positron colliding beams
质子 电子 正电子碰撞束
pair attenuation coefficient
正负电子对衰减系数
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。
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
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
An electron with a negative charge, as contrasted with a positron.
电子带有负电荷，与正电荷相反的电子
Electrons are negatively charged with electricity; protons are positively charged
电子带有负电荷，质子带有正电荷。
Electrons are negatively charged with electricity,protons are positively charged.
电子是带负电荷的,质子是带正电荷的。