In this paper, the aberration theory of electron image forming systems in the combined focusing and deflecting field has been researched using the technology of numerical simulation.
本文利用数值仿真技术对复合场中电子成像系统的像差理论做了研究。
The magnetic field associated with these particles helps protect the Earth from cosmic rays by deflecting them from the planet.
地磁场同这些粒子相结合令宇宙射线发生弯曲，从而帮助地球避开来访的宇宙射线。
A method of designing slowly-scanning circuits is described and a new type of deflection coil that can offer a uniform deflecting magnetic field is proposed.
本文叙述了慢扫描电路的设计方法，提出了一种新型偏转线圈结构，它能获得均匀的偏转磁场。
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