Publications related to Decentralized consensus optimization with asynchrony and delays

Blocked algorithms for the reduction to Hessenberg-triangular form revisited

We present two variants of Moler and Stewart's algorithm for reducing a matrix pair to Hessenberg-triangular (HT) form with increased data locality in the access to the matrices. In one of these variants, a careful reorganization and accumulation of Givens ...

2008

Exact and Efficient Signal Reconstruction in Frequency-Domain Optical-Coherence Tomography

Michaël Unser, Rainer Leitgeb, Chandra Sekhar Seelamantula

We address the problem of tomogram reconstruction in frequency-domain optical-coherence tomography. We propose a new technique for suppressing the autocorrelation artifacts that are commonly encountered with the conventional Fourier-transform-based approac ...

OSA2008

A monotonic evaluation of lower bounds for inf-sup stability constants in the frame of reduced basis approximations

Jan Sickmann Hesthaven, Yvon Maday

For accurate a posteriori error analysis of the reduced basis method for coercive and non-coercive problems, a critical ingredient lies in the evaluation of a lower bound for the coercivity or inf-sup constant. In this short Note, we generalize and improve ...

ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER2008

A novel optimization approach for minimum cost design of trusses

Abhinav Gupta

This paper describes new optimization strategies that offer significant improvements in performance over existing methods for bridge-truss design. In this study, a real-world cost function that consists of costs on the weight of the truss and the number of ...

2007

$ H _{ 2 } $ O: Reversible Hexagonal-Orthogonal Grid Conversion by 1-D Filtering

Dimitri Nestor Alice Van De Ville

In this work, we propose a new grid conversion algorithm between the hexagonal lattice and the orthogonal (a.k.a. Cartesian) lattice. The conversion process, named

H _{ 2 }

O, is easy to implement and is perfectly reversible using the same algorithm to ...

IEEE2007

Optimal maneuvering of seismic sensors for localization of subsurface targets

Volkan Cevher

We consider the problem of detecting and locating buried land mines and subsurface objects by using a maneuvering array that receives scattered seismic surface waves. We demonstrate an adaptive system that moves an array of receivers according to an optima ...

Institute of Electrical and Electronics Engineers2007

ODPOP: An algorithm for Open/Distributed Constraint Optimization

Boi Faltings, Adrian Petcu

We propose ODPOP, a new distributed algorithm for \textit{open multiagent combinatorial optimization} \cite{Faltings2005c}. The ODOP algorithm explores the same search space as the dynamic programming algorithm DPOP~\cite{Petcu2005} or the AND/OR search al ...

2006

Two Stage Estimation for the Echo Paths in Stereophonic Acoustic Echo Cancellation

Martin Vetterli, Christof Faller

A novel algorithm is introduced for estimating the echo path responses for stereophonic acoustic echo cancellation. When the Wiener solution for the echo path responses is non-unique, the echo paths are estimated in two stages. In a first stage, one of the ...

2006

Global mixed-integer dynamic optimization

Benoît Chachuat

Recent advances in process synthesis, design, operations, and control have created an increasing demand for efficient numerical algorithms for optimizing a dynamic system coupled with discrete decisions; these problems are termed mixed-integer dynamic opti ...

2005

Gracefully Degrading Fair Exchange with Security Modules

Rachid Guerraoui, Marko Vukolic, Gildas Avoine

The fair exchange problem is key to trading electronic items in systems of mutually untrusted parties. In modern variants of such systems, each party is equipped with a security module. The security modules trust each other but can only communicate by exch ...

2005

Decentralized consensus optimization with asynchrony and delays

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Blocked algorithms for the reduction to Hessenberg-triangular form revisited

Exact and Efficient Signal Reconstruction in Frequency-Domain Optical-Coherence Tomography

A monotonic evaluation of lower bounds for inf-sup stability constants in the frame of reduced basis approximations

A novel optimization approach for minimum cost design of trusses

$ H _{ 2 } $ O: Reversible Hexagonal-Orthogonal Grid Conversion by 1-D Filtering

Optimal maneuvering of seismic sensors for localization of subsurface targets

ODPOP: An algorithm for Open/Distributed Constraint Optimization

Two Stage Estimation for the Echo Paths in Stereophonic Acoustic Echo Cancellation

Global mixed-integer dynamic optimization

Gracefully Degrading Fair Exchange with Security Modules

ODPOP: An algorithm for Open/Distributed Constraint Optimization

Optimal maneuvering of seismic sensors for localization of subsurface targets

Exact and Efficient Signal Reconstruction in Frequency-Domain Optical-Coherence Tomography

Blocked algorithms for the reduction to Hessenberg-triangular form revisited

A monotonic evaluation of lower bounds for inf-sup stability constants in the frame of reduced basis approximations

$ H _{ 2 } $ O: Reversible Hexagonal-Orthogonal Grid Conversion by 1-D Filtering

A novel optimization approach for minimum cost design of trusses

Two Stage Estimation for the Echo Paths in Stereophonic Acoustic Echo Cancellation

Gracefully Degrading Fair Exchange with Security Modules

Global mixed-integer dynamic optimization