下半空间 meaning in Chinese

lower half-space

With the study of boundary condition of vector potentials and the application of image method and sommerfeld integrals , this thesis deduces the vector potentials of vertical and horizontal dipoles near an interface ( both above and below the interface )
本文通过磁矢位边界条件的研究，应用镜象法和索末菲积分，推导出半空间界面附近(包括上、下半空间中)的垂直电偶极子和水平电偶极子的磁矢位。