Scattering by buried metal or dielectric objects have beensolved by the unimoment method and the T-matrix method. The T-ma-trix method is limited to inhomogeneity of the medium of the layeredvariety, so it cannot be applied to the partly buried scatterer. The uni-moment method, using finite element in the inhomogeneous part, solvesthe partly buried problemâ€¦ (More)

In this paper we present a new iterative technique for large and dense linear systems. This technique originally came from the MEI method in electromagnetic fields. The effectiveness of the new technique is safeguarded by a convergence theorem given here. Numerical experiments illustrate that the computed errors for the first approximation with initialâ€¦ (More)

The Measured Equation of Invariance (MEI) is a geometry-dependent Finite Difference equation that can be used to terminate a mesh extremely close to the object of interest. The mesh can be terminated much closer than what absorbing boundary conditions would allow, but still keeping the locality of the equations. In this paper, this new concept is applied toâ€¦ (More)

The measured equation of invariance (MEI) is a simple technique used to derive finite difference type local equations at mesh boundaries, where the conventional finite difference approach fails [1,2]. The equation is derived based on the fact that it is invariant to the incident fields. Finite difference and finite element equations are examples of suchâ€¦ (More)