文章基于Mie 全波散射理论，建立了石墨烯包裹介电纳米线平行排布在介质中的复合结构的有效介质理论.在长波 极限下，我们得到了石墨烯包裹介电(GCD)纳米线结构的等价(EQ)介电常数和磁导率.通过分析比较远场散射谱，我们发现 相同尺寸的等价电磁结构可以和原复合结构进行有效的拟合;此外，由于介电颗粒及石墨烯参数的可调性，我们得到了该复 合体系可调的隐身及共振散射.进一步研究发现，该复合体系还可以实现可调的法诺共振.

Based on the full wave scattering theory，we establish the effective media theory for the composite system，where graphene-coated nanowires are parallel to each other and randomly embedded in the host medium.Under the long-wave limit，we achieve the equivalent (EQ) permittivity and permeability of the graphene-coated dielectric (GCD) nanowire，and we demonstrate that the far-field scattering spectrum of the electromagnetic structure with equivalent parameters matches well with the one of the composite system. Besides，we find that it is possible to realize tunable invisibility and resonance by varying the permittivity of the dielectric nanowires or the chemical potential of the coated graphene. With further study，we prove that there also exists tunable Fano-resonance in such composite system.