目的设计磁聚焦电导率成像系统硬件，实现数据采集。
Objective to design a system of conductivity tomography using focused magnetic fields for data acquisition.
本文探讨了在某种特定磁场分布下带电粒子流的磁聚焦问题。
In this paper, the authors explore the problem of magnetic focusing of charged-particle flow in some specific distribution of magnetic fields.
通过对磁聚焦系统进行优化设计，外层电子注轨迹得到明显改善。
Optimization of the magnetic focusing system can decrease the radial magnetic induction and improve the electron beam quality.
得到了这种材料磁聚焦参数随器件长度和激励磁场(电流)变化的实验结果。
Experimental results of dependences of the concentration parameter on device length and excited field (current) were obtained, respectively.
推导了三铁块磁聚焦孔道聚焦参数的计算公式，其计算结果与实测作了比较。
The formulations for the calculation of focussing parameters of the three iron bar-magnetic focussing channel are derived in this paper. The calculation results are consistent with the measurement.
磁线圈将电子束聚焦成细小的点。
他们使用了经颅磁刺激(TMS)技术，用紧密聚焦的磁场来使大脑的局部地区暂时失去功能。
They achieved this using transcranial magnetic stimulation (TMS), a technology that USES a tightly focused magnetic field to temporarily disable individual regions of the brain.
分析了磁光盘驱动器聚焦与循轨数字伺服系统各组成部分的原理，并设计和实现了一套基于DSP的数字伺服控制系统。
The paper analyzes the principle of components of magneto optical disk driver focusing and tracking servo system, then designs and realizes a DSP based digital servo control system.
质谱分析仪器有限公司(微星)专门从事高性能磁业双聚焦质谱仪仪器。
Mass Spectrometry Instruments Ltd (MSI) specializes in high performance magnetic sector double focusing mass spectrometer Instruments.
结论：多信道经颅磁刺激线圈阵列在人体头部产生的电磁场可控性强，聚焦性能强，而且可同时刺激不同的靶目标。
Conclusion: the magnetic and electric fields produced by transcranial brain multichannel magnetic stimulation are easy to focus and control, and they can focus on two or more targets simultaneously.
通过两种磁线圈电场强度三维分布的仿真，确定了磁刺激的效果和影响磁刺激聚焦性和深度的因素。
By 3 D simulation of the induced electric field of two kinds of coils, the effect of magnetic stimulation can be demonstrated and the factors influencing stimulating focality and depth are identified.
通过两种磁线圈电场强度三维分布的仿真，确定了磁刺激的效果和影响磁刺激聚焦性和深度的因素。
By 3 D simulation of the induced electric field of two kinds of coils, the effect of magnetic stimulation can be demonstrated and the factors influencing stimulating focality and depth are identified.
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