In designing left-handed metamaterials composed of magnetic resonators and electric resonators,two design principles,that is,the single-loop mirror-symmetry design principle and double-loop(quadruple-loop) mirror-symmetry design principle,were respectively proposed for the design of magnetic resonators and electric resonators.

With the methods of Navier-Stokes equation and the symmetrical mirror image, the numerical simulation is carried out about the three-dimensional fluent field produced by the low-level wind shear nearby airports; According to the computational results, the prediction about the location and the intensity of the wind shear can be made out.