Search Results - "Webb, J P"

Partially oxidised organic components in urban aerosol using GCXGC-TOF/MS by Hamilton, J. F., Webb, P. J., Lewis, A. C., Hopkins, J. R., Smith, S., Davy, P.

“…Partially oxidised organic compounds associated with PM2.5 aerosol collected in London, England, have been analysed using direct thermal desorption coupled to…”
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A p-Adaptive Scheme for Scalar Fields, Using High-Order, Singular Finite Elements by Webb, J. P.

“…For problems with sharp edges, where the electric or magnetic field is singular, p -adaptive finite-element analysis loses some of its effectiveness. This can…”
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Optimization of microwave devices using 3-D finite elements and the design sensitivity of the frequency response by Nair, D., Webb, J.P.

“…Direct optimization of microwave devices is more efficient if sensitivities of the cost function are available. An earlier method for finding sensitivities of…”
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Singular Tetrahedral Finite Elements of High Order for Scalar Magnetic and Electric Field Problems by Webb, J.P.

“…Two series of high-order tetrahedral finite elements are proposed for better representation of the scalar potential near sharp edges and corners. The new…”
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A FLAME Molecule for 3-D Electromagnetic Scattering by Pinheiro, H., Webb, J.P.

“…The flexible local approximation method has been shown to be an effective computational technique for solving problems involving large numbers of similar…”
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A Rational Approach to B - H Curve Representation by Diez, Patrick, Webb, J. P.

“…This paper introduces an approach to construct a rational function that fits the finite set of data points on the B-H plane representing the non-linear…”
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Design sensitivity of frequency response in 3-D finite-element analysis of microwave devices by Webb, J.P.

“…The finite-element method is an established computational tool for analyzing three-dimensional microwave devices. It can also provide, at little additional…”
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Design sensitivities for scattering-matrix calculation with tetrahedral edge elements by Akel, H., Webb, J.P.

“…The rates of change of the scattering matrix of a microwave device with respect to geometric or material parameters are of interest to designers, and useful in…”
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Antenna Modeling Using an Iterative Absorbing Boundary Condition and High-Order Finite Elements by Paul, P., Webb, J.P.

“…The iterative absorbing boundary condition (IABC) is a flexible and accurate way of truncating the computational domain for finite-element analysis of…”
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Balancing Boundary and Discretization Errors Using an Iterative Absorbing Boundary Condition by Paul, P., Webb, J.P.

“…An iterative scheme is described for solving unbounded electromagnetic scattering problems using the finite-element method. The scheme starts with elements of…”
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Finite-Element Simulation in Bioelectromagnetics Without the Need for Modeling and Meshing by Gu, H., Gotman, J., Webb, J.P.

“…Biological data often takes the form of regular grids of samples, e.g., obtained by magnetic resonance imaging (MRI). When the finite-element method is used to…”
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Flexible Local Approximation Models for Wave Scattering in Photonic Crystal Devices by Pinheiro, H., Webb, J.P., Tsukerman, I.

“…The dominant mode of a photonic crystal (PC) waveguide is computed by an eigenvalue formulation of the flexible local approximation method (FLAME). The…”
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Reducing the Computational Cost of Inverse Scattering Problems With Evolutionary Algorithms by Paul, P., Guimaraes, F.G., Webb, J.P.

“…In an inverse scattering problem, the constituent parameters of a scatterer are identified from the scattered field. In this paper, we use the real-coded…”
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A Rational Approach to Curve Representation by Diez, Patrick, Webb, J. P.

“…This paper introduces an approach to construct a rational function that fits the finite set of data points on the [Formula Omitted]-[Formula Omitted] plane…”
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Polygonal Finite Elements of Arbitrary Order by Mukherjee, T., Webb, J. P.

“…Finite elements with the shape of arbitrary polygons have been previously described. Originally they were first-order, i.e., able to represent exactly all…”
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Using adjoint solutions to estimate errors in global quantities by Webb, J.P.

“…Adjoint solutions are widely used in computational electromagnetics to provide sensitivities of global quantities to variation in design parameters. They can…”
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Construction of device performance models using adaptive interpolation and sensitivities by Tsao, D., Webb, J.P.

“…The performance of a device can be obtained as a continuous function of design parameters by repeated finite element analysis (FEA) followed by interpolation…”
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Accuracy-Controlled Combined Adaption- Optimization Scheme for Finite-Element Analysis of 3-D Microwave Devices by Nair, D., Webb, J.P.

“…Greater reliability and large computational savings can be achieved by linking the adaptive iteration of a computational analysis with the outer, optimization…”
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Edge elements and what they can do for you by Webb, J.P.

“…The various types of edge elements and their useful properties are reviewed. Continuity, singularities, and separation are discussed, with particular reference…”
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Scattering from dielectric and metallic bodies using a high-order, Nystrom, multilevel fast mutipole algorithm by Rawat, V., Webb, J.P.

“…The multilevel fast multipole algorithm (MLFMA) is an established way to accelerate the solution of the integral equations governing scattering of…”
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