A new method of measurement on near field electromagnetic radiation of printed circuit boards is described with the basic principle of its operation discussed.

文中主要阐述了一种测量印刷电路板近场电磁辐射的新方法，讨论了此种方法的基本工作原理。

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Various kinds of transmission lines can not be avoided for us when carrying out field electromagnetic measurement and may even affect earthquake station observation.

目前的野外电磁测量已很难回避各种输电线的干扰，且有时各种输电线已影响到地震台站的电磁测量。

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Then the derivation of local illumination source is reported, the near-field electromagnetic scattering characteristics of some electrically large structures are calculated and analyzed.

论文在推导出实现局部照射的激励源的基础上，计算并分析一些电大结构的近场局部照射下的电磁散射特性。

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The Earth's core is important because it generates the planet's electromagnetic field - which seems to be weakening.

BBC: Planet Earth

It uses an electromagnetic field, rather than carbon brushes, to accelerate from standstill to up to 100, 000 revolutions per minute within 0.7 seconds.

BBC: Dyson launches all-in-one hand-drying Airblade water tap

Using a conductive capacitor that is integrated as part of the pen, it connects to an electromagnetic field generated by an excitation coil in the digitizer.

ENGADGET: N-trig's Digital Pencil plays pen and fingertip roles, claims mastery of both