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- The design of the BPL 750keV beam transport system and the study of beam space charge effect in this system are descried. 本文阐述了北京质子直线加速器(BPL)750 keV束流输运系统的物理设计和束流空间电荷效应的研究.
- First, without the consideration of the space charge effect, the process of longitudinal direction beam bunching in MPG is given. 在不考虑空间电荷效应的情况下，模拟了在微脉冲电子枪中电子纵向聚束的过程。
- Second, the formation of the saturation current affected by the space charge effect and bunching effect is studied in details. 进而详细研究了在空间电荷效应作用及相聚过程共同作用下形成饱和电流的过程。
- The structure and configuration of the porous minerals were discussed, and the porthole effect and surface charge effect were mainly illuminated. 对多孔矿物材料的孔道结构和形态进行了分析,然后对多孔矿物材料的孔道效应和表面荷电效应进行了重点介绍。
- The space charge effect (SCE) of static induction transistor (SIT) that occurs in high current region is systematically studied. 摘要研究了静电感应晶体管(SIT)在大注入情况下出现的空间电荷效应，分析了空间电荷效应的物理机制。
- The nonlinear space charge effect due to the nonuniform particle density distribution in bunched beam of a linac is discussed. 提出了在强流直线加速器中,由空间电荷束团的密度分布所引起的非线性效应。
- However, the space charge effect seriously limits the direct extraction a low-energy ion beam containing industrially-satisfied high current. 然而，由于空间电荷的累积效应，严重地限制了引出一具有高电流的低能量离子束。
- Setting Cathode Ray Tube (CRT) as an example, this paper gives an overview on how space charge effect influences electron beam spot size on the screen with respect to different cathode current. 以阴极射线管(CRT)为例,研究了在不同发射电流下空间电荷效应对荧光屏上电子束点大小的影响。
- With Klein-Gordon equation,one can obtain Planck spectrum of thermal radiation coming from the event horizon, which shows electric charge effect and rotation effect of the black hole. 如果进而讨论Klein-Gordon方程;则能得到热辐射谱;以及电荷与转动附加在热谱上的特征.
- Space charge effect is harmful for DC HV and EHV plastic power cable.In this paper, metallocene catalyzed polyethylene(MPE) acting as a nucleator, was blended into low-density polyethylene(LDPE). 普通低密度聚乙烯以其优良的综合性能在高压和超高压电线电缆领域得到了广泛的应用，研究其存在的空间电荷效应具有重要的意义。
- The influence of space charge effect on the beams was considered to optimize the axial injection system.An injection system for a 100 MeV cyclotron with high intensity and efficiency was designed. 摘要针对空间电荷效应对束流的影响，对注入系统进行优化设计，减少了传输过程中的粒子损失，建立了一个高效率的强流回旋加速器注入系统。
- Avoid high temperatures and the sun to recharge areas, high temperature will affect the charging effect. 避免在温度高，太阳晒到的地方充电，温度过高会影响充电效果。
- The disease is still in its primary stage. 这疾病仍然在初发阶段。
- Piezoelectric or stored charge effects: the creation of charge unbalances (and thus current flow or voltage shift) due to mechanical stress. 压电或储存电荷效应：由于机械应力产生的电荷不平衡（从而产生了电流或电压偏置）。
- Wang T H, Li H W, Zhou J M. Charging effect in InAs selfassembled quantum dots [ J] .Appl Phys Lett, 2001, 79(10): 1537. 王太宏;李宏伟;贾海强等.;纳米结构的制备及单电子器件研究[J]
- The little boy left primary school at eleven. 这个小男孩十一岁时小学毕业。
- Sure. We are friends since primary school. 当然，我们从小学就是朋友了。
- I started primary school when I was 5 years old. 我五岁时开始读小学。
- A primary cause of Tom's failure is his laziness. 懒惰是汤姆失败的主要原因之一。
- Primary school teachers use a lot of visual aids. 小学教师使用大量的视觉教具。
