L. Borcea et Gc. Papanicolaou, NETWORK APPROXIMATION FOR TRANSPORT-PROPERTIES OF HIGH-CONTRAST MATERIALS, SIAM journal on applied mathematics, 58(2), 1998, pp. 501-539
We show that the effective complex impedance of materials with conduct
ivity and dielectric permittivity that have high contrast can be calcu
lated approximately by solving a suitable resistor-capacitor network.
We use variational principles extensively for the analysis and we asse
ss the accuracy of the network approximation by numerical computations
.