An Efficient Hybrid Method for 3D Scattering from Inhomogeneous Object Buried beneath a Dielectric Randomly Rough Surface

Table 1

Comparisons of the computing resource for different methods.

Method	Number of unknowns	Memory requirement (G)	Solving; time (s)
FEM/MoM	83836	107.34	3807
New method	12186	1.43	127

Calculated by a computer with a 2.8 GHz processor (AMD Opteron (tm) Processor 4280), RAM 128 GB.