Introduction Conclusions References

When for example a blood flow is measured by ultrasound Doppler tomography, part of the received data can be modelled as the Radon transform of the region of reflecting particles. The reconstruction problem thus consists of determining a homogeneous object (that is to determine a function only attaining the values 0 and 1) from Radon transform data. Standard inversion method for the Radon trans...

The Newton-Sabatier method for solving inverse scattering problem with fixed-energy phase shifts for a sperically symmetric potential is discussed. It is shown that this method is fundamentally wrong in the sense that its foundations are wrong: in general it cannot be carried through because its basic integral equation may be not solvable for some r > 0 and in this case the method breaks down; ...

This paper surveys the recent developments in the area of equalization of the wireless propagation channels. It focuses on a subclass of equalization algorithms that minimizes the Mean Square Error (MMSE) between the desired and estimated signal. The following aspects of the equalization problem are considered: system modeling, algorithm classification based on the availability of training sequ...

Using our semi-linear inversion method, we measure the mass profile of the lens galaxy in the Einstein ring system 0047−2808. The lens is modelled as a baryonic component following the observed light, embedded in a dark matter generalised NFW halo. The semi-linear method makes full use of the information content in the ring image. We determine an unevolved B-band mass to light ratio for the bar...

Acoustic-to-articulatory maps based on articulatory models have typically been evaluated in terms of acoustic accuracy, that is, the distance between mapped and observed acoustic parameters. In this paper we present a method that would allow for the evaluation of such maps in the articulatory domain. The proposed method estimates the parameters of Maeda’s articulatory model on the basis of elec...

The direct inversion method for data assimilation using isentropic tracer advection M. N. Juckes British Atmospheric Data Centre, SSTD, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, UK Received: 15 June 2005 – Accepted: 13 July 2005 – Published: 19 September 2005 Correspondence to: M. Juckes ([email protected]) © 2005 Author(s). This work is licensed under a Creative...

Algorithms for the rapid computation of the forward and inverse discrete Fourier transform for points which are nonequispaced or whose number is unrestricted are presented. The computational procedure is based on approximation using a local Taylor series expansion and the fast Fourier transform (FFT). The forward transform for nonequispaced points is computed as the solution of a linear system ...

This paper proposes a two-dimensional (2-D) VLSI architecture using a uni ed systolic array for fast computation of the discrete cosine transform/discrete sine transform/discrete Hartley transform (DCT/DST/DHT). The N -point discrete transform is decomposed into evenand oddnumbered frequency samples and they are computed independently at the same time. The proposed uni ed systolic array archite...