For plasma torus with elliptical cross-section, a feedback system with conducting shell and active control coils has been suggested.

我们取等离子体截面为椭圆，反馈系统由导壳和主动反馈线圈构成。

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The method for measuring the penetration time constant of a step vertical or horizontal magnetical field through a resistive conducting shell is described.

本文叙述了测量阶跃脉冲垂直磁场和水平磁场渗透hl - 1装置各种比例导体壳时间常数的方法。

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By using a concise method, the charge distribution on the surface of a thick spherical conducting shell revolving in a homogeneous magnetic field is obtained.

用简单方法求出了在均匀磁场中旋转的导体厚球壳上电荷的分布，证明了在磁场中转动的导体表面电荷分布无普遍公式。

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The company is most likely not conducting active operations (a shell) but continues to file statements to keep it in compliance (financials, required reporting forms, etc.).

FORBES: Fraud In Chinese Reverse Mergers on American Exchanges -- And We're Surprised?

Shell has been relentlessly conducting its own PR campaign to distort the truth about what the company is doing in the Arctic.

CNN: Shell Oil's multibillion dollar Arctic hoax