Publications associées à A Fourier-accelerated volume integral method for elastoplastic contact

Fourier modeling of the BOLD response to a breath-hold task: Optimization and reproducibility

João Pedro Forjaco Jorge, Patricia Figueiredo, Inês Nunes de Sousa

Cerebrovascular reactivity (CVR) reflects the capacity of blood vessels to adjust their caliber in order to maintain a steady supply of brain perfusion, and it may provide a sensitive disease biomarker. Measurement of the blood oxygen level dependent (BOLD ...

Elsevier2016

An Improved Approach for the Calculation of the Transient Ground Resistance Matrix of Multiconductor Lines

The general integral expressions for the elements of the ground impedance matrix do not have an analytical inverse transform in the time domain. Therefore, the ground transient resistance of a multiconductor line is commonly evaluated in the time domain by ...

Ieee-Inst Electrical Electronics Engineers Inc2016

Effective a posteriori Co-Phasing of Interferometric Fringe Data

Ferréol Arnaud Marie Soulez

We have recently shown that a posteriori co-phasing of multi-spectral interferograms was possible.(1) In this contribution, we extend our approach so that it can be applied to actual data as provided by AMBER(2) or MATISSE instruments. The main advantage o ...

SPIE2016

Closed fringe demodulation using phase decomposition by Fourier basis functions

Pramod Rastogi, Rishikesh Dilip Kulkarni

We report a new technique for the demodulation of a closed fringe pattern by representing the phase as a weighted linear combination of a certain number of linearly independent Fourier basis functions in a given row/column at a time. A state space model is ...

2016

A vector field method on the distorted Fourier side and decay for wave equations with potentials

Joachim Krieger, Roland Donninger

We study the Cauchy problem for the one-dimensional wave equation

\partial_t^2 u(t,x)-\partial_x^2 u(t,x)+V(x)u(t,x)=0.

The potential

V

is assumed to be smooth with asymptotic behavior

V(x)\sim -\tfrac14 |x|^{-2}\mbox{ as } |x|\to \infty.

...

2016

Learning-Based Compressive Subsampling

Volkan Cevher, Jonathan Mark Scarlett, Ilija Bogunovic, Yen-Huan Li, Luca Baldassarre, Baran Gözcü

The problem of recovering a structured signal

\mathbf{x} \in \mathbb{C}^p

from a set of dimensionality-reduced linear measurements

\mathbf{b} = \mathbf {A}\mathbf {x}

arises in a variety of applications, such as medical imaging, spectroscopy, Fourier o ...

Ieee-Inst Electrical Electronics Engineers Inc2016

Stable Simulation of Nonlinearly Loaded Lossy Transmission Lines with Time Marching Approach

Akiyoshi Tatematsu

A stable method for the analysis of lossy transmission lines with nonlinear loads is presented. The simulation employs the time marching (TM) method for solving the convolution equations in the time domain. To cope with the late-time instability of the TM ...

Ieee2016

A Novel Preprocessing Tool to Enhance ECG R-wave Extraction

Jean-Marc Vesin, Sasan Yazdani

Various approaches have been proposed to detect the R-waves in the ECG. From the derivative-based to more complicated wavelet transform methods, the main goal of these approaches is to extract the R-waves from the perturbations present in the ECG. Our stud ...

2016

Extension of Fourier-based techniques for ultrafast imaging in ultrasound with diverging waves

Jean-Philippe Thiran, Rafael Eduardo Carrillo Rangel, Adrien Georges Jean Besson, Olivier Bernard, Damien Garcia

Ultrafast ultrasound imaging has become an intensive area of research thanks to its capability in reaching high frame rates. In this paper, we propose a scheme which allows the extension of the current Fourier-based techniques derived for planar acquisitio ...

Institute of Electrical and Electronics Engineers2016

Numerical approximation of the fractional Laplacian via hp-finite elements, with an application to image denoising

Jan Sickmann Hesthaven, Paolo Gatto

The fractional Laplacian operator (−∆)s on a bounded domain Ω can be realized as a Dirichlet-to-Neumann map for a degenerate elliptic equation posed in the semi-infinite cylinder Ω × (0,∞). In fact, the Neumann trace on Ω involves a Muckenhoupt weight that ...

Springer Verlag2015

A Fourier-accelerated volume integral method for elastoplastic contact

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Fourier modeling of the BOLD response to a breath-hold task: Optimization and reproducibility

An Improved Approach for the Calculation of the Transient Ground Resistance Matrix of Multiconductor Lines

Effective a posteriori Co-Phasing of Interferometric Fringe Data

Closed fringe demodulation using phase decomposition by Fourier basis functions

A vector field method on the distorted Fourier side and decay for wave equations with potentials

Learning-Based Compressive Subsampling

Stable Simulation of Nonlinearly Loaded Lossy Transmission Lines with Time Marching Approach

A Novel Preprocessing Tool to Enhance ECG R-wave Extraction

Extension of Fourier-based techniques for ultrafast imaging in ultrasound with diverging waves

Numerical approximation of the fractional Laplacian via hp-finite elements, with an application to image denoising

Numerical approximation of the fractional Laplacian via hp-finite elements, with an application to image denoising

An Improved Approach for the Calculation of the Transient Ground Resistance Matrix of Multiconductor Lines

Fourier modeling of the BOLD response to a breath-hold task: Optimization and reproducibility

A vector field method on the distorted Fourier side and decay for wave equations with potentials

Learning-Based Compressive Subsampling

Stable Simulation of Nonlinearly Loaded Lossy Transmission Lines with Time Marching Approach

Effective a posteriori Co-Phasing of Interferometric Fringe Data

Extension of Fourier-based techniques for ultrafast imaging in ultrasound with diverging waves

Closed fringe demodulation using phase decomposition by Fourier basis functions

A Novel Preprocessing Tool to Enhance ECG R-wave Extraction