Namur Institute for Complex Systems

  • 5000

    Belgium

Research Output 1977 2020

2020

Adaptive regularization algorithms with inexact evaluations for nonconvex optimization

Bellavia, S., Gurioli, G., Morini, B. & Toint, P., 2 Jan 2020, In : SIAM Journal on Optimization. 29, 4, p. 2881-2915

Research output: Contribution to journalArticle

Open Access
File
Nonconvex Optimization
Adaptive algorithms
Regularization
Derivatives
Derivative
3 Downloads (Pure)

An algorithm for the minimization of nonsmooth nonconvex functions using inexact evaluations and its worst-case complexity

Gratton, S., Simon, E. & Toint, P., 2 Jan 2020, (Accepted/In press) In : Mathematical Programming. to appear, 19 p.

Research output: Contribution to journalArticle

Open Access
File
Derivatives
Evaluation
Adaptive algorithms
Nonconvex Minimization
Inexact Methods
Open Access
File
Phase Plane
Limit Cycle
Curvature
Damping
Periodic Solution

Global and local information in structured derivative free optimization with BFO

Porcelli, M. & Toint, P., 15 Jan 2020, Arxiv, 27 p.

Research output: Working paper

File
Derivatives
Constrained optimization
Interpolation

High-Order Evaluation Complexity for Convexly-Constrained Optimization with Non-Lipschitzian Group Sparsity Terms

Chen, X. & Toint, P., 2020, (Accepted/In press) In : Mathematical Programming. 1902.10767, p. 1-27 27 p.

Research output: Contribution to journalArticle

Constrained optimization
Constrained Optimization
Sparsity
Higher Order
Evaluation

Sharp worst-case evaluation complexity bounds for arbitrary-order nonconvex optimization with inexpensive constraints

Toint, P., Cartis, C. & Gould, N. I. M., 2020, (Accepted/In press) In : SIAM Journal on Optimization. 31 p.

Research output: Contribution to journalArticle

Open Access
File
Nonconvex Optimization
Derivatives
Evaluation
Arbitrary
Derivative
2019

A dynamic network analysis of emergent grammar

Ibbotson, P., Salnikov, V. & Walker, R., 1 Dec 2019, In : First Language. 39, 6, p. 652-680 29 p.

Research output: Contribution to journalArticle

network analysis
grammar
community
language
cultural system
9 Downloads (Pure)
Open Access
File
genetic algorithms
engineering
mutations
optimization
escape
3 Downloads (Pure)
File
Rain
Weather forecasting
Costs
6 Downloads (Pure)

A note on using performance and data profiles for training algorithms

Porcelli, M. & Toint, P. L., 1 Jan 2019, In : ACM Transactions on Mathematical Software. 45, 2, a20.

Research output: Contribution to journalArticle

File
Training Algorithm
Derivatives
Derivative-free
Integer
Benchmarking
Evolutionary algorithms
Decomposition
Costs
3 Downloads (Pure)
Open Access
File
wire
news
completeness
linear systems
electronics
Neurosciences
Causality
Mental Health
Research Personnel
6 Downloads (Pure)

Classes of random walks on temporal networks with competing timescales

Petit, J., Lambiotte, R. & Carletti, T., 1 Dec 2019, In : Applied Network Science. 4, 1, p. 1-20 20 p., 72.

Research output: Contribution to journalArticle

Open Access
File
Random walk
Time Scales
Stationary States
Mathematical Analysis
Coexistence

CMB-HD: An Ultra-Deep, High-Resolution Millimeter-Wave Survey Over Half the Sky

Sehgal, N., Aiola, S., Akrami, Y., Basu, K., Boylan-Kolchin, M., Bryan, S., Clesse, S., Cyr-Racine, F-Y., Di Mascolo, L., Dicker, S., Essinger-Hileman, T., Ferraro, S., Fuller, G., Han, D., Hasselfield, M., Holder, G., Jain, B., Johnson, B. R., Johnson, M., Klaassen, P. & 20 others, Madhavacheril, M., Mauskopf, P., Meerburg, D., Meyers, J., Mroczkowski, T., Münchmeyer, M., Naess, S. K., Nagai, D., Namikawa, T., Newburgh, L., Nguyen, N., Niemack, M., Oppenheimer, B. D., Pierpaoli, E., Schaan, E., Slosar, A., Spergel, D., Switzer, E., van Engelen, A. & Wollack, E., 2019, In : American Astronomical Society. Bulletin. 51, 7, p. 6 23 p.

Research output: Contribution to journalArticle

millimeter waves
sky
deserts
high resolution
astrophysics
2 Downloads (Pure)

Complexity of partially separable convexly constrained optimization with non-Lipschitzian singularities

Chen, X., Toint, P. & Wang, H., 15 Apr 2019, In : SIAM Journal on Optimization. 29, 1, p. 874-903 30 p.

Research output: Contribution to journalArticle

Open Access
File
Constrained optimization
Constrained Optimization
Singularity
Objective function
Regularization

Coupling between the spin precession and polar motion of a synchronously rotating satellite: application to Titan

Baland, R-M., Coyette, A. & Van Hoolst, T., 1 Feb 2019, In : Celest. Mech. & Dyn. Astr.. 131, 11

Research output: Contribution to journalArticle

Open Access
polar motion
Titan
precession
Rotating
Satellites
Serine
Enzymes
Phosphoserine
Molecular Dynamics Simulation
Glycine

Developing and deploying a taxi price comparison mobile app in the wild: Insights and challenges

Noulas, A., Salnikov, V., Hristova, D., Mascolo, C. & Lambiotte, R., 31 Jan 2019, Proceedings - 2018 IEEE 5th International Conference on Data Science and Advanced Analytics, DSAA 2018. Eliassi-Rad, T., Wang, W., Cattuto, C., Provost, F., Ghani, R. & Bonchi, F. (eds.). Institute of Electrical and Electronics Engineers Inc., p. 424-430 7 p. 8631455. (Proceedings - 2018 IEEE 5th International Conference on Data Science and Advanced Analytics, DSAA 2018).

Research output: Contribution in Book/Catalog/Report/Conference proceedingConference contribution

Application programs
Driver
Pricing
Mobile Applications
Costs

DEVICES FOR THE DIRECTIONAL EMISSION AND RECEPTION OF GRAVITATIONAL WAVES

Füzfa, A., 4 Jul 2019, IPC No. H02N 11/ 00 A I, Patent No. WO2019129745, Priority date 27 Dec 2017, Priority No. EP20170210675

Research output: Patent

gravitational waves
electromagnets
inventions
magnetic fields
electromagnetic radiation

Dictionary learning in Extended Dynamic Mode Decomposition using a reservoir computer

Gulina, M. & Mauroy, A., 19 Mar 2019, 38th Benelux Meeting on Systems and Control: Book of Abstracts. p. 42 211 p.

Research output: Contribution in Book/Catalog/Report/Conference proceedingConference contribution

Glossaries
Nonlinear systems
Decomposition

Driving white dwarf metal pollution through unstable eccentric periodic orbits

Antoniadou, K. & Veras, D., 2019, In : Astronomy and Astrophysics. 629, A126

Research output: Contribution to journalArticle

Dynamical exploration of the repertoire of brain networks at rest is modulated by psilocybin

Lord, L. D., Expert, P., Atasoy, S., Roseman, L., Rapuano, K., Lambiotte, R., Nutt, D. J., Deco, G., Carhart-Harris, R. L., Kringelbach, M. L. & Cabral, J., 1 Oct 2019, In : NeuroImage. 199, p. 127-142 16 p.

Research output: Contribution to journalArticle

Psilocybin
Brain
Mental Processes
Hallucinogens
Functional Neuroimaging

Editorial: Novel Technological and Methodological Tools for the Understanding of Collective Behaviours

Tuci, E., Trianni, V., King, A. & Garnier, S., 2019, In : Frontiers in Robotics and AI. 3 p.

Research output: Contribution to journalEditorial

Open Access
File

Electromagnetic probes of primordial black holes as dark matter

Primordial Black Holes, 2019, In : American Astronomical Society. Bulletin. 51, 3, p. 51

Research output: Contribution to journalArticle

dark matter
electromagnetism
probes

Evaluation complexity bounds for smooth constrained nonlinear optimization using scaled KKT conditions and high-order models

Cartis, C., Gould, N. I. M. & Toint, P., Jun 2019, Springer Optimization and Its Applications: Algorithms, Complexity and Applications. Demetriou, I. & Pardalos, P. (eds.). Springer Heidelberg, p. 5-26 22 p. (Springer Optimization and Its Applications; vol. 145).

Research output: Contribution in Book/Catalog/Report/Conference proceedingChapter

KKT Conditions
Constrained Optimization
Nonlinear Optimization
Higher Order
Derivatives
4 Downloads (Pure)

Exploiting variable precision in GMRES

Gratton, S., Simon, E., Titley-Peloquin, D. & Toint, P., Jul 2019, 19 p.

Research output: Working paper

File
GMRES
Digital arithmetic
Arnoldi
Iterative Solver
Floating-point Arithmetic
1 Downloads (Pure)

Fitness differences, not niche differences, limit species richness

Spaak, J. W., Carpentier, C. & Laender, F. D., 30 Oct 2019, In : bioRxiv. 6 p.

Research output: Contribution to journalArticle

File
niches
species diversity
ecology

Food web uncertainties influence predictions of climate change effects on soil carbon sequestration in heathlands

Reyns, W., Rineau, F., Spaak, J., Franken, O., Berg, M., Van der Plas, F., Bardgett, R., Beenaerts, N. & De Laender, F., 25 Oct 2019, In : Microbial Ecology. p. 1-8 8 p.

Research output: Contribution to journalArticle

Open Access
heathland
heathlands
soil carbon
carbon sequestration
food webs

From networks to optimal higher-order models of complex systems

Lambiotte, R., Rosvall, M. & Scholtes, I., 1 Apr 2019, In : Nature Physics. 15, 4, p. 313-320 8 p.

Research output: Contribution to journalArticle

complex systems
interactions

Global stability analysis

Mauroy, A., Sootla, A. & Mezić, I., 2019, (Accepted/In press) The Koopman Operator in Systems and Control: Theory, Numerics, and Applications. Springer

Research output: Contribution in Book/Catalog/Report/Conference proceedingChapter (peer-reviewed)

Horizontal and vertical diversity jointly shape food web stability against small and large perturbations

Zhao, Q., Van den Brink, P. J., Carpentier, C., Wang, Y. X. G., Rodríguez-Sánchez, P., Xu, C., Vollbrecht, S., Gillissen, F., Vollebregt, M., Wang, S. & De Laender, F., 1 Jul 2019, In : Ecology Letters. 22, 7, p. 1152-1162 11 p.

Research output: Contribution to journalLetter

Open Access
food webs
food web
perturbation
trophic level
biodiversity
25 Downloads (Pure)

Identification of the invasive form of Corbicula clams in Ireland

Sheehan, R., Etoundi, E., Minchin, D., Van Doninck, K. & Lucy, F., 1 Aug 2019, In : Water (Switzerland). 11, 8, 1652.

Research output: Contribution to journalArticle

Open Access
File
Corbicula
Bivalvia
clams
Ireland
Microsatellite Repeats
astrophysics
injection
vacuum
LIGO (observatory)
sensitivity
14 Downloads (Pure)

Influence of fake news in Twitter during the 2016 US presidential election

Bovet, A. & Makse, H. A., 2 Jan 2019, In : Nature Communications. 10, 1, p. 7 7 p., 7.

Research output: Contribution to journalArticle

Open Access
File
Spreaders
news
Information Services
Causality
outlets

In Memoriam of Andy Conn

Toint, P., 19 Nov 2019, In : SIAG/ OPT Views-and-News. 27, 2, p. 9-10 1 p.

Research output: Contribution to journalArticle

Interaction of POPC, DPPC, and POPE with the μ opioid receptor: A coarse-grained molecular dynamics study

Angladon, M-A., Fossépré, M., Leherte, L. & Vercauteren, D., 1 Mar 2019, In : PLoS ONE. 14, 3, p. e0213646 19 p., e0213646.

Research output: Contribution to journalArticle

Open Access
molecular dynamics
narcotics
Opioid Receptors
Molecular Dynamics Simulation
Molecular dynamics

Introduction to the Koopman operator in systems and control theory

Mauroy, A., Susuki, Y. & Mezić, I., 2019, (Accepted/In press) The Koopman Operator in Systems and Control: Theory, Numerics, and Applications. Springer

Research output: Contribution in Book/Catalog/Report/Conference proceedingChapter (peer-reviewed)

Investigation of Cyclic Ligand Inhibiting CD2-CD58 Interactions Using Molecular Dynamics and Molecular Docking Approaches - COMP579

Vercauteren, D., Leherte, L., Laurent, A. & Jacquemin, D., Apr 2019, Abstracts of the 2557th Annual Meeting and Exposition of the American Chemical Society.

Research output: Contribution in Book/Catalog/Report/Conference proceedingConference contribution

Open Access
File
24 Downloads (Pure)

Koopman-based lifting techniques for nonlinear systems identification

Mauroy, A. & Goncalves, J., 2019, In : IEEE Transactions on Automatic Control. 16 p.

Research output: Contribution to journalArticle

Open Access
File
Nonlinear systems
Identification (control systems)
Sampling
Derivatives
9 Downloads (Pure)

Light scattering spectroscopy combined with Principal Component Analysis for animal species identification in historical parchments

Fernandez Alvarez, A. M., Mayer, A. & Deparis, O., 2019, Proceedings of OSA Advanced Photonics Congress. OSA - The Optical Society, 2 p. NoT2B.4

Research output: Contribution in Book/Catalog/Report/Conference proceedingConference contribution

Open Access
File
light scattering
spectroscopy
principal component analysis
animals
methodology

Modeling the Sensitivity of Aquatic Macroinvertebrates to Chemicals Using Traits

Van Den Berg, S. J. P., Baveco, H., Butler, E., De Laender, F., Focks, A., Franco, A., Rendal, C. & Van Den Brink, P. J., 21 May 2019, In : Environmental Science and Technology. 53, 10, p. 6025-6034 10 p.

Research output: Contribution to journalArticle

Open Access
macroinvertebrate
modeling
ecotoxicology
Life cycle
Animals

Multi-scale Anomaly Detection on Attributed Networks

Gutiérrez-Gómez, L., Bovet, A. & Delvenne, J-C., 2019, (Accepted/In press).

Research output: Contribution to conferencePaper

Open Access
Polynomial approximation
Metadata
Scalability
Signal processing
Economics

Multiscale dynamical embeddings of complex networks

Schaub, M. T., Delvenne, J. C., Lambiotte, R. & Barahona, M., 20 Jun 2019, In : Physical Review E. 99, 6, 18 p., 062308.

Research output: Contribution to journalArticle

Complex Networks
embedding
Control Theory
control theory
Vertex of a graph

Network analysis of whole-brain fMRI dynamics: A new framework based on dynamic communicability

Gilson, M., Kouvaris, N. E., Deco, G., Mangin, J. F., Poupon, C., Lefranc, S., Rivière, D. & Zamora-López, G., 1 Nov 2019, In : NeuroImage. 201, 116007.

Research output: Contribution to journalArticle

Magnetic Resonance Imaging
Brain
Neuroimaging
1 Downloads (Pure)

Numerical testing by a transfer-matrix technique of Simmons' equation for the local current density in metal-vacuum-metal junctions

Mayer, A., Mousa, M., Hagmann, M. & Forbes, R., 1 Jan 2019, In : Jordan Journal of Physics. 12, 1, p. 63-77 15 p.

Research output: Contribution to journalArticle

Open Access
File
current density
vacuum
potential energy
metals
Wentzel-Kramer-Brillouin method
Open Access
universe
big bang cosmology
gold
Jordan
axioms