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Résultat de recherche 1977 2020

2013
17 Downloads (Pure)

Entends-tu cette main

Toint, P., 16 oct. 2013, 1 p. L'Arbre à paroles.

Résultats de recherche: Autre contribution

Accès ouvert
File
79 Downloads (Pure)

Nonlinear stepsize control, trust regions and regularizations for unconstrained optimization

Toint, P., 1 févr. 2013, Dans : Optimization Methods and Software. 28, 1, p. 82-95 14 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Step-size Control
Trust Region
Unconstrained Optimization
Nonlinear Control
Regularization
28 Downloads (Pure)

On the evaluation complexity of cubic regularization methods for potentially rank-deficient nonlinear least-squares problems and its relevance to constrained nonlinear optimization

Cartis, C., Gould, N. & Toint, P., 29 oct. 2013, Dans : SIAM Journal on Optimization. 23, 3, p. 1553-1574 22 p.

Résultats de recherche: Contribution à un journal/une revueArticle

Accès ouvert
File
Nonlinear Least Squares Problem
Regularization Method
Constrained Optimization
Nonlinear Optimization
Regularization
9 Downloads (Pure)
File
Penalized Least Squares
Nonlinear Least Squares Problem
Conjugate Gradient
Dual space
Preconditioning
161 Downloads (Pure)

Synthetic population generation without a sample

Barthelemy, J. & Toint, P., 1 mai 2013, Dans : Transportation Science. 47, 2, p. 266-279 14 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
aggregate data
Costs
Belgium
privacy
municipality
2012
22 Downloads (Pure)

A Model of Weekly Labor Participation for a Belgian Synthetic Population

Cirillo, C., Cornelis, E. & Toint, P., 1 mars 2012, Dans : Networks and Spatial Economics. 12, 1, p. 59-73 15 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Personnel
Industry
8 Downloads (Pure)

An adaptive cubic regularization algorithm for nonconvex optimization with convex constraints and its function-evaluation complexity

Cartis, C., Gould, N. & Toint, P., 1 oct. 2012, Dans : IMA Journal of Numerical Analysis. 32, 4, p. 1662-1695 34 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Convex Constraints
Nonconvex Optimization
Function evaluation
Evaluation Function
Regularization
26 Downloads (Pure)

Complexity bounds for second-order optimality in unconstrained optimization

Cartis, C., Gould, N. I. M. & Toint, P., 1 févr. 2012, Dans : Journal of Complexity. 28, p. 93-108 16 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Unconstrained Optimization
Optimality
Regularization
Global optimization
Trust Region Algorithm
24 Downloads (Pure)

Erratum: Nonlinear programming without a penalty function or a filter (Mathematical Programming (2010) 122 (155-196)

Gould, N. I. M. & Toint, P., 1 févr. 2012, Dans : Mathematical Programming. 131, 1-2, p. 403-404 2 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
39 Downloads (Pure)

Evaluation complexity of adaptive cubic regularization methods for convex unconstrained optimization

Toint, P., Cartis, C. & Gould, N., 1 avr. 2012, Dans : Optimization Methods and Software. 27, 2, p. 197-219 23 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Convex optimization
Unconstrained Optimization
Regularization Method
Newton-Raphson method
Convex Optimization

How much gradient noise does a gradient-based linesearch method tolerate ?

Gratton, S., Toint, P. & Tröltzsch, A., 2012, FUNDP. Namur center for complex systems. (NAXYS Technical Report; Vol 04-2012)

Résultats de recherche: Livre/Rapport/RevueAutre rapport

28 Downloads (Pure)

How much patience do you have? A worst-case perspective on smooth nonconvex optimization

Cartis, C., Gould, N. & Toint, P., 1 janv. 2012, Dans : Optima. 88, 1-10

Résultats de recherche: Contribution à un journal/une revueArticle

Accès ouvert
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Worst-case Analysis
Nonconvex Optimization
Complexity Analysis

Mobilité des Personnes: Tendances, réalisations et défis

Cornelis, E. & Toint, P., déc. 2012, Bruxelles: Conseil Central de l'Economie. (Lettre Mensuelle Socio-économique; Vol 186)

Résultats de recherche: Livre/Rapport/RevueRapport commissionné

38 Downloads (Pure)

On the complexity of the steepest-descent with exact linesearches

Cartis, C., Gould, N. I. M. & Toint, P., 2012, FUNDP. Namur center for complex systems. (NAXYS Technical Report; Vol 16-2012)

Résultats de recherche: Livre/Rapport/RevueAutre rapport

Accès ouvert
File
13 Downloads (Pure)

On the oracle complexity of first-order and derivative-free algorithms for smooth nonconvex minimization

Cartis, C., Gould, N. I. M. & Toint, P., 1 janv. 2012, Dans : SIAM Journal on Optimization. 22, 1, p. 66-86 21 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Nonconvex Minimization
Derivative-free Methods
Derivative-free
First-order
Derivatives
7 Downloads (Pure)

Updating the regularization parameter in the adaptive cubic regularization algorithm

Gould, N., Porcelli, M. & Toint, P., 1 sept. 2012, Dans : Computational Optimization and Applications. 53, 1, p. 1-22 22 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Regularization Parameter
Updating
Regularization
Interpolation
Nonlinear Least Squares Problem
30 Downloads (Pure)

Using approximate secant equations in limited memory methods for multilevel unconstrained optimization

Gratton, S., Malmedy, V. & Toint, P., 1 avr. 2012, Dans : Computational Optimization and Applications. 51, 3, p. 967-979 13 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Limited Memory Method
Conjugate gradient method
Unconstrained Optimization
Newton-Raphson method
Chord or secant line
2011
20 Downloads (Pure)

Adaptive cubic regularisation methods for unconstrained optimization. Part I: Motivation, convergence and numerical results

Cartis, C., Gould, N. I. M. & Toint, P. L., 1 avr. 2011, Dans : Mathematical Programming. 127, 2, p. 245-295 51 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Unconstrained Optimization
Regularization Method
Convergence Results
Numerical Results
Lipschitz
32 Downloads (Pure)

Adaptive cubic regularisation methods for unconstrained optimization. Part II: Worst-case function- and derivative-evaluation complexity

Cartis, C., Gould, N. & Toint, P., 1 déc. 2011, Dans : Mathematical Programming. 130, 2, p. 295-319 25 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Unconstrained Optimization
Regularization Method
Derivatives
Iteration
Derivative
9 Downloads (Pure)

An active-set trust-region method for derivative-free nonlinear bound-constrained optimization

Gratton, S., Toint, P. & Tröltzsch, A., 1 août 2011, Dans : Optimization Methods and Software. 26, 4-5, p. 873-894 22 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Active Set Method
Derivative-free
Trust Region Method
Constrained optimization
Constrained Optimization
2 Downloads (Pure)

Approximating Hessians in multilevel unconstrained optimization

Malmedy, V. & Toint, P., 2011, Dans : Computational Optimization and Applications. 50, 1, p. 1-22 22 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Conjugate gradient method
Unconstrained Optimization
Newton-Raphson method
Quasi-Newton Method
Line Search
30 Downloads (Pure)

Approximating Hessians in unconstrained optimization arising from discretized problems

Malmedy, V. & Toint, P., 1 sept. 2011, Dans : Computational Optimization and Applications. 50, 1, p. 1-22 22 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Unconstrained Optimization
Newton-Raphson method
Finite difference method
Trust Region Algorithm
Large-scale Optimization
12 Downloads (Pure)

Fast regularized linear sampling for inverse scattering problems

Fares, M., Gratton, S. & Toint, P., 1 janv. 2011, Dans : Numerical Linear Algebra with Applications. 18, 1, p. 55-68 14 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Inverse Scattering Problem
Sampling Methods
Singular value decomposition
Numerical Procedure
Far Field
26 Downloads (Pure)

On the evaluation complexity of composite function minimization with applications to nonconvex nonlinear programming

Cartis, C., Gould, N. & Toint, P., 1 janv. 2011, Dans : SIAM Journal on Optimization. 21, 4, p. 1721-1739 19 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Nonconvex Programming
Function Minimization
Composite function
Function evaluation
Nonlinear programming

Optimal Newton-type methods for nonconvex smooth optimization problems

Cartis, C., Gould, N. & Toint, P., 2011, Namur: Namur center for complex systems.

Résultats de recherche: Livre/Rapport/RevueAutre rapport

45 Downloads (Pure)

Range-space variants and inexact matrix-vector products in Krylov solvers for linear systems arising from inverse problems

Gratton, S., Toint, P. & Tshimanga Ilunga, J., 1 janv. 2011, Dans : SIAM Journal on Matrix Analysis and Applications. 32, 3, p. 969-986 18 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Cross product
Matrix Product
Inverse Problem
Data Assimilation
Linear Systems
135 Downloads (Pure)

Stopping rules and backward error analysis for bound-constrained optimization

Gratton, S., Mouffe, M. & Toint, P., 1 sept. 2011, Dans : Numerische Mathematik. 119, 1, p. 163-187 25 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Backward Error Analysis
Stopping Rule
Constrained optimization
Constrained Optimization
Error analysis
2010
70 Downloads (Pure)

Approximate invariant subspaces and quasi-Newton optimization methods

Gratton, S. & Toint, P. L., 1 août 2010, Dans : Optimization Methods and Software. 25, 4, p. 507-529 23 p.

Résultats de recherche: Contribution à un journal/une revueArticle

Accès ouvert
File
Quasi-Newton Method
Invariant Subspace
Optimization Methods
Chord or secant line
Newton-Raphson method
18 Downloads (Pure)

A retrospective trust-region method for unconstrained optimization

Bastin, F., Malmedy, V., Toint, P., Tomanos, D. & Mouffe, M., 1 juin 2010, Dans : Mathematical Programming. 123, 2, p. 395-418 24 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Trust Region Method
Unconstrained Optimization
Iterate
Update
Global Convergence
227 Downloads (Pure)

Convergence of a regularized Euclidean residual algorithm for nonlinear least-squares

Bellavia, S., Morini, B., Cartis, C., Gould, N. I. M. & Toint, P. L., 1 janv. 2010, Dans : SIAM Journal on Numerical Analysis. 48, 1, p. 1-29 29 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Nonlinear Least Squares
Nonlinear equations
Euclidean
Convergence Properties
System of Nonlinear Equations
39 Downloads (Pure)

Estimating nonparametric random utility models with an application to the value of time in heterogeneous populations

Bastin, F., Cirillo, C. & Toint, P., 1 nov. 2010, Dans : Transportation Science. 44, 4, p. 537-549 13 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
interpretation
Belgium
Distribution functions
time
present
4 Downloads (Pure)

Formulation and solution strategies for nonparametric nonlinear stochastic programmes with an application in finance

Bastin, F., Cirillo, C. & Toint, P., 1 avr. 2010, Dans : Optimization. 59, 3, p. 355-376 22 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Finance
Distribution functions
Cumulative distribution function
Stochastic programming
Formulation
63 Downloads (Pure)

Nonlinear programming without a penalty function or a filter

Gould, N. & Toint, P., 1 mars 2010, Dans : Mathematical Programming. 122, 1, p. 155-196 42 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Nonlinear programming
Penalty Function
Nonlinear Programming
Filter
Trust Region
5 Downloads (Pure)

Numerical experience with a recursive trust-region method for multilevel nonlinear bound-constrained optimization

Gratton, S., Mouffe, M., Sartenaer, A., Toint, P. & Tomanos, D., 1 juin 2010, Dans : Optimization Methods and Software. 25, 3, p. 359-386 28 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Trust Region Method
Recursive Method
Constrained optimization
Constrained Optimization
Trust Region Algorithm
8 Downloads (Pure)

On the complexity of steepest descent, Newton's and regularized Newton's methods for nonconvex unconstrained optimization problems

Cartis, C., Gould, N. & Toint, P., 1 janv. 2010, Dans : SIAM Journal on Optimization. 20, 6, p. 2833-2852 20 p.

Résultats de recherche: Contribution à un journal/une revueArticle

Accès ouvert
File
Nonconvex Optimization
Steepest Descent
Unconstrained Optimization
Newton-Raphson method
Newton Methods

Optimization theory and methods, by Wenyu Sun and Ya-Xiang Yuan

Toint, P., 2010, Dans : Optimization Methods and Software. 25, 2, p. 333-334 2 p.

Résultats de recherche: Contribution à un journal/une revueCritique de livre/film/article

61 Downloads (Pure)

Self-correcting geometry in model-based algorithms for derivative-free unconstrained optimization

Scheinberg, K. & Toint, P., 1 janv. 2010, Dans : SIAM Journal on Optimization. 20, 6, p. 3512-3532 21 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Derivative-free Optimization
Unconstrained Optimization
Interpolation
Interpolate
Model-based

Solving structured nonlinear least-squares and nonlinear feasibility problems with expensive functions

Kaiser, M., Klamroth, K., Thekale, A. & Toint, P., 2010, Namur: FUNDP. Namur center for complex systems. (NAXYS Technical Report; Vol 07-2010)

Résultats de recherche: Livre/Rapport/RevueAutre rapport

Nonlinear Least Squares
Derivative-free
Evaluation Function
Derivative
Trust Region Method

Towards microsimulation of passenger and freight transport competition: Advances in synthetic population generation and simulation of the behaviour of freight actors

Barthelemy, J., Cornelis, E., Jourquin, B., Piotte, J. & Toint, P., 2010, (Non publié) Proceedings of the WCTR 2010 (electronic version).

Résultats de recherche: Contribution dans un livre/un catalogue/un rapport/dans les actes d'une conférenceChapitre

Personnel
2009
114 Downloads (Pure)

A multilevel algorithm for solving the trust-region subproblem

Toint, P., Tomanos, D. & Weber Mendonca, M., 1 avr. 2009, Dans : Optimization Methods and Software. 24, 2, p. 299-311 13 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Trust Region Subproblem
Newton-Raphson method
Discretization
Modified Newton Method
Trust Region
12 Downloads (Pure)

How much do approximate derivatives hurt filter methods?

Sainvitu, C. & Toint, P., 1 juil. 2009, Dans : RAIRO - Operations Research. 43, 3, p. 309-329 21 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Filter Method
Derivatives
Trust Region Algorithm
Derivative
Trust Region Method

Optimisation numérique appliquée, Le design des lentilles progressives

Toint, P. & Tomanos, D., 2009, Dans : Tangente. 126, p. 48-50 3 p.

Résultats de recherche: Contribution à un journal/une revueArticle

25 Downloads (Pure)

Recognizing underlying sparsity in optimization

Kim, S., Kojima, M. & Toint, P., 1 juil. 2009, Dans : Mathematical Programming. 119, 2, p. 273-303 31 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Sparsity
Linear transformations
Optimization
Combinatorial optimization
Heuristic algorithms
21 Downloads (Pure)

SVD-tail: A new linear-sampling reconstruction method for inverse scattering problems

Fares, M., Gratton, S. & Toint, P., 1 janv. 2009, Dans : Inverse Problems. 25, 9, p. 1-19 19 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Inverse Scattering Problem
Singular value decomposition
Far Field
Tail
Scattering
6 Downloads (Pure)

Trust-region and other regularisations of linear least-squares problems

Cartis, C., Gould, N. & Toint, P., 1 mars 2009, Dans : BIT Numerical Mathematics. 49, 1, p. 21-53 33 p.

Résultats de recherche: Contribution à un journal/une revueArticle

File
Secular Equation
Trust Region
Least-squares Solution
Linear Least Squares
Least Squares Problem
2008

A recursive trust-region method in infinity norm for bound-constrained nonlinear optimization

Gratton, S., Mouffe, M., Toint, P. & Weber Mendonca, M., 2008, (Non publié) Dans : IMA Journal of Numerical Analysis. 28, 4, p. 827-861 35 p.

Résultats de recherche: Contribution à un journal/une revueArticle

Trust Region Method
Recursive Method
Constrained Optimization
Nonlinear Optimization
Infinity

A recursive ℓ-trust-region method for bound-constrained nonlinear optimization

Gratton, S., Mouffe, M., Toint, P. & Weber-Mendona, M., 1 oct. 2008, Dans : IMA Journal of Numerical Analysis. 28, 4, p. 827-861 35 p.

Résultats de recherche: Contribution à un journal/une revueArticle

Trust Region Method
Recursive Method
Constrained Optimization
Nonlinear Optimization
Trust Region

Optimization Methods & Software: Preface

Toint, P. & Yuan, Y., 1 avr. 2008, Dans : Optimization Methods and Software. 23, 2, p. 175-176 2 p.

Résultats de recherche: Contribution à un journal/une revueArticle