Publications related to Laplace operator

Construction of Wavelet Bases That Mimic the Behaviour of Some Given Operator

Michaël Unser, Dimitri Nestor Alice Van De Ville, Thierry Blu, Ildar Khalidov

Probably the most important property of wavelets for signal processing is their multiscale derivative-like behavior when applied to functions. In order to extend the class of problems that can profit of wavelet-based techniques, we propose to build new fam ...

SPIE2007

Inversion de Fourier ponctuelle

Emanuel Enrico Seifert

Let f be an integrable function on RN, a a point in RN and B a complex number. If the mean value of f on the sphere of centre a and radius r tends to B when r tends to 0, we show that the Fourier integral at a of f is summable to B in Cesàro means of order ...

EPFL2007

Dense Disparity Estimation from Omnidirectional Images

Pascal Frossard, Zafer Arican

This paper addresses the problem of dense estimation of disparities between omnidirectional images, in a spherical framework. Omnidirectional imaging certainly represents important advantages for the representation and processing of the plenoptic function ...

2007

Modeling of Hysteresis Losses Applied to Slotless Permanent Magnet Motors

Yves Perriard, Miroslav Markovic, Pierre-Daniel Pfister

The paper presents a method to determine hysteresis losses in synchronous permanent magnet (M) slotless motors. The method comprises four steps: (1) experimental determination of the B-H loop, () analytical modeling of the B-H loop by applying different mo ...

2007

From Differential Equations to the Construction of New Wavelet-Like Bases

Michaël Unser, Ildar Khalidov

In this paper, an approach is introduced based on differential operators to construct wavelet-like basis functions. Given a differential operator L with rational transfer function, elementary building blocks are obtained that are shifted replicates of the ...

IEEE2006

Winding strings in AdS3

Correlation functions of one-unit spectral flowed states in string theory on AdS3 are considered. We present the modified Knizhnik-Zamolodchikov and null vector equations to be satisfied by amplitudes containing states in winding sector one and study their ...

2006

Numerical Evaluation of the Accuracy and Stability Properties of High-order Direct Stokes Solvers with or without Temporal Splitting

Michel Deville, Emmanuel Leriche

The temporal stability and effective order of two different direct high-order Stokes solvers are examined. Both solvers start from the primitive variables formulation of the Stokes problem, but are distinct by the numerical uncoupling they apply on the Sto ...

Springer, Kluwer Academic Publishers-Plenum Publishers2006

Electrochemical characterization of mechanically implanted boron doped diamond electrodes MI-BDD

Christos Comninellis, Rolf Wüthrich

A new, low production cost, technique for the preparation of boron-doped diamond electrodes (BDD) is presented. The technique is based on mechanical implantation of BDD particles into a titanium substrate. The electrochemical characterization of low covera ...

2006

Generalized L-Spline Wavelet Bases

Michaël Unser, Thierry Blu, Ildar Khalidov

We build wavelet-like functions based on a parametrized family of pseudo-differential operators

L _{ v }

that satisfy some admissibility and scalability conditions. The shifts of the generalized B-splines, which are localized versions of the Green func ...

SPIE2005

Fraud within Asymmetric Multi-Hop Cellular Networks

Gildas Avoine

At Financial Cryptography 2003, Jakobsson, Hubaux, and Buttyan suggested a lightweight micro-payment scheme aimed at encouraging routing collaboration in asymmetric multi-hop cellular networks. We will show in this paper that this scheme suffers from some ...

2005

Laplace operator

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Construction of Wavelet Bases That Mimic the Behaviour of Some Given Operator

Inversion de Fourier ponctuelle

Dense Disparity Estimation from Omnidirectional Images

Modeling of Hysteresis Losses Applied to Slotless Permanent Magnet Motors

From Differential Equations to the Construction of New Wavelet-Like Bases

Winding strings in AdS3

Numerical Evaluation of the Accuracy and Stability Properties of High-order Direct Stokes Solvers with or without Temporal Splitting

Electrochemical characterization of mechanically implanted boron doped diamond electrodes MI-BDD

Generalized L-Spline Wavelet Bases

Fraud within Asymmetric Multi-Hop Cellular Networks

Winding strings in AdS3

Inversion de Fourier ponctuelle

Modeling of Hysteresis Losses Applied to Slotless Permanent Magnet Motors

Construction of Wavelet Bases That Mimic the Behaviour of Some Given Operator

Electrochemical characterization of mechanically implanted boron doped diamond electrodes MI-BDD

Numerical Evaluation of the Accuracy and Stability Properties of High-order Direct Stokes Solvers with or without Temporal Splitting

Fraud within Asymmetric Multi-Hop Cellular Networks

Generalized L-Spline Wavelet Bases

Dense Disparity Estimation from Omnidirectional Images

From Differential Equations to the Construction of New Wavelet-Like Bases