A uniformly charged ring is a basic model in electromagnetics and applications, and it is important to study spatial distribution of electric field and electric potential generated by it.
均匀带电细圆环是电磁学理论及应用中的基本模型，研究其产生的电场在空间的分布具有重要意义。
Considering complex geoelectric model, the study of 3-d inversion approaches of borehole-to-surface electric data is always a challenge.
针对复杂地电模型的井地电法三维反演方法研究一直是一个具有挑战性的课题。
There are two main kinds of CAD method to study the property of PDP cell now, the fluid model and the equivalent electric circuit model.
目前PD P放电单元工作特性的CAD研究方法主要有两类，流体力学模型法和等效电路模型法。
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