Three-Dimensional Metacomposite Based on Different Ferromagnetic Microwire Spacing for Electromagnetic Shielding

An electromagnetic shielding metacomposite based on the absorbing mechanism was prepared by weaving ferromagnetic microwires into the three-dimensional(3D)fabric.The influence of the ferromagnetic microwire spacing on electromagnetic shielding performance and the electromagnetic shielding mechanism of 3D metacomposites were studied.The total electromagnetic shielding performance increases with the increase of electromagnetic wave frequency.3D metacomposites based on the absorbing mechanism can avoid the secondary pollution of electromagnetic waves,and have great potential in military,civil,aerospace and other fields.

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过去,人们都称读书人为书生。在那些文化不发达的年代里,读书尚是一件比较高雅,且成本代价比较高昂的事情,因此,读书几乎只是少数贵族或有钱人的专利。当然,随着开科取士的推行,也有一些贫寒之士进入读书人行列。不管怎么说,读书人只是少数。于是乎,书生在普通人的眼中便成了特殊的人群。由于书生在行为举止上。