## Search

Now showing items 1-10 of 77

#### Fast multipole method in layered media: 2-D electromagnetic scattering problems

(IEEE, 1996)

In this study, the Fast Multipole Method (FMM) is extended to layered-media problems. As an example, the solution of the scalar Helmholtz equation for the electromagnetic scattering from a two-dimensional planar array of ...

#### The discrete fractional Fourier transformation

(IEEE, 1996)

Based on the fractional Fourier transformation of sampled periodic functions, the discrete form of the fractional Fourier transformation is obtained. It is found that only for a certain dense set of fractional orders such ...

#### A wavelet based recursive reconstruction algorithm for linear measurements

(IEEE, 1996)

A recursive algorithm is proposed to obtain an efficient regularized least squares solution to large linear system of equations which arises in many physical measurement models. The algorithm recursively updates the solution ...

#### Fast direct (noniterative) solvers for integral-equation formulations of scattering problems

(IEEE, 1998)

A family of direct (noniterative) solvers with reduced computational complexity is proposed for solving problems involving resonant or near-resonant structures. Based on the recursive interaction matrix algorithm, the ...

#### Automated detection and enhancement of microcalcifications in mammograms using nonlinear subband decomposition

(IEEE, 1997)

In this paper, computer-aided detection and enhancement of microcalcifications in mammogram images are considered. The mammogram image is first decomposed into subimages using a `subband' decomposition filter bank which ...

#### An efficient algorithm to extract components of a composite signal

(IEEE, 2000)

An efficient algorithm is proposed to extract components of a composite signal. The proposed approach has two stages of processing in which the time-frequency supports of the individual signal components are identified and ...

#### Fast processing techniques for accurate ultrasonic range measurements

(Institute of Physics Publishing, 2000)

Four methods of range measurement for airborne ultrasonic systems - namely simple thresholding, curve-fitting, sliding-window, and correlation detection - are compared on the basis of bias error, standard deviation, total ...

#### An O(n1/3) algorithm for distributed mutual exclusion

(Elsevier, 1998)

In this paper, a distributed algorithm is proposed that realizes mutual exclusion among n nodes in a computer network. No common or global memory is shared by the nodes and there is no global controller. The nodes of the ...

#### Solving maximum clique problem by cellular neural network

(The Institution of Engineering and Technology, 1998-07-23)

An approximate solution of an NP-hard graph theoretical problem, namely finding maximum clique, is presented using cellular neural networks. Like the existing energy descent optimising dynamics, the maximal cliques will ...

#### Multilevel physical optics algorithm for fast solution of scattering problems involving nonuniform triangulations

(IEEE, 2007)

This paper shows the computational efficiency of the multilevel physical optics (MLPO) algorithm can be further increased by employing nonuniform triangulations of the target surface so that the triangle size is not nearly ...