COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 12 Issue 1

MODELLING AND ANALYSIS OF THE ELECTRIC FIELD FOR A CANONICAL PROBLEM IN EDM

H. GAN, P.L. LEVIN, C.A. BROWN

We present two models of the electric field for a canonical problem in electric discharge machining. In particular, an analytical solution based on optimal parameter estimation is…

COMPARISON OF DIRECT DIFFERENTIATION AND ADJOINT VARIABLE METHOD FOR ELECTRICAL IMPEDANCE IMAGING

S.‐Y. HAHN, I.‐H. PARK, H.‐K. JUNG, J. SIKORA

In the shadow of X‐ray tomography and nuclear magnetic resonance tomography a new tomographic technique based on low‐frequency electric currents has been successfully developed in…

SOME ASPECTS OF OPTIMUM DESIGN OF ELECTROMAGNETIC DEVICES

J. SIKORA, W. KWIATKOWSKI, H. KRAUS

A new method of designing electromagnetic devices especially high‐voltage ones, is presented. As a result of applying a sequential quadratic programing algorithm and a very…

ACCURATE CUBIC SPLINE INTERPOLATION OF MAGNETIZATION TABLES

E.A. BADEA, S. PISSANETZKY

The accurate interpolation of magnetization tables is of paramount importance in the design of high‐precision magnets used for particle accelerators or for magnetic resonance…

HIGH‐ORDER POSITIVE, MONOTONE AND CONVEX MULTIGRID INTERPOLATIONS

W. JOPPICH, R.A. LORENTZ

We develop new high‐order positive, monotone and convex interpolations, which are to be used in the multigrid context. This means that the value of the interpolant is calculated…

STATIONARY SOLUTIONS OF HYDRODYNAMIC MODELS FOR SEMICONDUCTOR DEVICE SIMULATION

A. MAJORANA, G. RUSSO

Two hydrodynamic models of a semiconductor device are considered. The first takes into account thermal and collisional effects, while neglecting viscous terms, which are included…