The Institute of Physics ( IOP ) по журналам "Inverse Problems"
Отображаемые элементы 120 из 848

(20001001)In this paper we address one of the most challenging problems of electromagnetic (EM) geophysical methods: threedimensional (3D) inversion of EM data over inhomogeneous geological formations. The difficulties in the ...

(19980201)This paper considers the problem of vector tomography on an arbitrary bounded domain in three dimensions. The probe transform of a vector field is the inner product of the Radon transform of a vector field with a unit ...

(19901201)The author derives an estimatemaximize formulation of a Bayesian superresolution algorithm for reconstructing scattering cross sections from coherent images. He generalizes this result to obtain an 'autofocus/superresolution' ...

(19941201)A simple algebraic mapping, when applied to linear PDES, yields 'Cintegrable' nonlinear PDES. Some examples are exhibited.

(19850801)A class of integrable dynamical systems is exhibited. A system of n coupled nonlinear ordinary differential equations for n dependent variables.

(19971201)This paper describes a simple algorithm for reconstructing the complex index of refraction of a bounded object immersed in a known background from a knowledge of how the object scatters known incident radiation. The method ...

(19850201)It has recently been shown that the physical properties of a layered ocean floor may, in principle, be determined from an analysis of the resonances in frequency, or in the angle of incidence, which appear in bottomreflected ...

(20001201)This paper considers the determination, from scattered sound, of a distributed inhomogeneity in a shallow, twodimensional, ocean with a thin ice cap. Assuming that we know the acoustic properties of the ice cap, we determine ...

(19900401)The authors extend and apply the inverse scattering techniques of Colton and Monk (1987) to twodimensional bodies with sharp corners and concavities. In particular they study how the functional representation of the unknown ...

(19910601)Acoustic scattering allows the authors to obtain the values of parameters which characterize the solid layers of a plane structure composed of three layers: a first plastic elastic layer, a thin water layer and a second ...

(19940401)The adaptive (online) estimation of parameters for a class of secondorder distributed parameter systems is considered. This class of systems, which includes abstract wave and beam equations with a variety of forms of ...

(19941001)A general algorithm for the direct inversion of data to yield unknown functions entering physical systems is presented. Of particular interest are linear and nonlinear dynamical systems. The potential broad applicability ...

(19961201)Motivated by electromagnetic wave propagation in media where permittivity varies in two dimensions, we address the problem of wave scattering for twodimensional (2D) media having variable speed. Wave speed variations are ...

(19951001)We consider the inversion of the threedimensional (3D) Xray transform with a limited data set containing the line integrals which have two intersections with the lateral surface of a cylindrical detector. The usual ...

(19850501)The inverse scattering problem for the Schrodinger equation in R3 is solved by applying a Marchenko procedure in the Faddeev method. The characterisation is formulated as a Hilbert transform and yields a simple formula for ...

(19961001)We present a Lax representation for a family of finitedimensional integrable Hamiltonian systems (FDIHS). Their classical Poisson structures are constructed. The associated rmatrices depend not only on the spectral ...

(19971001)An ndimensional (n = 2,3) inverse problem for the parabolic/diffusion equation , , , is considered. The problem consists of determining the function a(x) inside of a bounded domain given the values of the solution u(x,t) ...

(19961001)In this paper we present a new method for solving inverse obstacle scattering problems where the far field for many incident plane waves is known. The main idea of the method is to approximate point sources by a superposition ...

(19910401)The twodimensional layered volume conductor forward and inverse problems are solved by modelling the medium as an equivalent twodimensional filter relating the source and measured potentials. This extends previous results ...

(19991001)The paper considers the Galerkin finiteelement approximation of the Boltzmann transport equation for charged particles. The aim is to model the electron transport in biological tissue for the dose calculation and to apply ...
Отображаемые элементы 120 из 848