Namur Institute for Complex Systems

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Research Output 1977 2019

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2019
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A concise second-order evaluation complexity for unconstrained nonlinear optimization using high-order regularized models

Cartis, C., Gould, N. I. M. & Toint, P., 1 Oct 2019, (Accepted/In press) In : Optimization Methods and Software. to appear

Research output: Contribution to journalArticle

Function evaluation
Unconstrained Optimization
Adaptive algorithms
Nonlinear Optimization
Tensors

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
5 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
4 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
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

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

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
22 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
11 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
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

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

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

Optimality of orders one to three and beyond: Characterization and evaluation complexity in constrained nonconvex optimization

Cartis, C., Gould, N. I. M. & Toint, P., 10 Aug 2019, In : Journal of Complexity. 53, p. 68-94 32 p.

Research output: Contribution to journalArticle

Open Access
File
Nonconvex Optimization
Constrained optimization
Constrained Optimization
Optimality
Criticality
3 Downloads (Pure)

Patterns of non-normality in networked systems

Muolo, R., Asllani, M., Fanelli, D., Maini, P. & Carletti, T., 7 Nov 2019, In : Journal of Theoretical Biology. 480, p. 81-91 11 p.

Research output: Contribution to journalArticle

Open Access
File
Non-normality
diffusivity
Turing Instability
Directed Network
Pattern Formation

Periodic DFT Study of the Effects of Co‐Crystallization on a N‐Salicylideneaniline Molecular Switch

Quertinmont, J., Leyssens, T., Wouters, J. & Champagne, B., 2 Oct 2019, ChemPhysChem, 20, 19, p. 2434-2442 9 p.

Research output: Contribution to specialist publicationArticle

Discrete Fourier transforms
Hydrogen bonds
Switches
Halogens
Wave functions

Racing thoughts revisited: A key dimension of activation in bipolar disorder

Weiner, L., Ossola, P., Causin, J. B., Desseilles, M., Keizer, I., Metzger, J. Y., Krafes, E. G., Monteil, C., Morali, A., Garcia, S., Marchesi, C., Giersch, A., Bertschy, G. & Weibel, S., 1 Aug 2019, In : Journal of affective disorders. 255, p. 69-76 8 p.

Research output: Contribution to journalArticle

Bipolar Disorder
Depression
Anxiety
Aptitude
Surveys and Questionnaires

RankMerging: a supervised learning-to-rank framework to predict links in large social networks

Tabourier, L., Bernardes, D. F., Libert, A. S. & Lambiotte, R., 14 Oct 2019, In : Machine Learning. 108, 10, p. 1729-1756 28 p.

Research output: Contribution to journalArticle

Supervised learning
Robustness (control systems)
Parameter estimation
Feature extraction
Computational complexity
12 Downloads (Pure)

Reactive explorers to unravel network topology

Adam, I., Fanelli, D., Carletti, T. & Innocenti, G., 1 May 2019, In : European Physical Journal B. 92, 5, 99.

Research output: Contribution to journalArticle

Open Access
File
Relocation
Network Topology
topology
Topology
Modulation
23 Downloads (Pure)

Resilience for stochastic systems interacting via a quasi-degenerate network

Nicoletti, S., Fanelli, D., Zagli, N., Asllani, M., Battistelli, G., Carletti, T., Chisci, L., Innocenti, G. & Livi, R., 1 Aug 2019, In : Chaos: an interdisciplinary journal of nonlinear science. 29, 8, 11 p., 083123.

Research output: Contribution to journalArticle

Open Access
File
resilience
Stochastic systems
Resilience
Stochastic Systems
Amplification
Open Access
Random walk
Random processes
Dynamic Contact
Waiting Time Distribution
Random process

Simplicial complexes and complex systems

Salnikov, V., Cassese, D. & Lambiotte, R., 1 Jan 2019, In : European Journal of Physics. 40, 1, 014001.

Research output: Contribution to journalArticle

complex systems
cavities
interactions

Stressor fluxes alter the relationship between beta-diversity and regional productivity

De Raedt, J., Baert, J. M., Janssen, C. R. & De Laender, F., 1 Jul 2019, In : OIKOS. 128, 7, p. 1015-1026 12 p.

Research output: Contribution to journalArticle

herbicides
algae
productivity
ecosystems
organisms

Temporal Sequence of Retweets Help to Detect Influential Nodes in Social Networks

Bhowmick, A. K., Gueuning, M., Delvenne, J. C., Lambiotte, R. & Mitra, B., 1 Jun 2019, In : IEEE Transactions on Computational Social Systems. 6, 3, p. 441-455 15 p., 8692729.

Research output: Contribution to journalArticle

Social Networks
social network
Vertex of a graph
Anchors
twitter

The 3D secular dynamics of radial-velocity-detected planetary systems

Volpi, M., Roisin, A. & Libert, A-S., 2019, In : Astronomy and Astrophysics. 626, id.A74, 10 p.

Research output: Contribution to journalArticle

The dimensionality of stability depends on disturbance type

Radchuk, V., Laender, F. D., Cabral, J. S., Boulangeat, I., Crawford, M., Bohn, F., Raedt, J. D., Scherer, C., Svenning, J. C., Thonicke, K., Schurr, F. M., Grimm, V. & Kramer-Schadt, S., 1 Apr 2019, In : Ecology Letters. 22, 4, p. 674-684 11 p.

Research output: Contribution to journalArticle

disturbance
ecosystems
ecological stability
species diversity
ecosystem

Towards more predictive and interdisciplinary climate change ecosystem experiments

Rineau, F., Malina, R., Beenaerts, N., Arnauts, N., Bardgett, R. D., Berg, M. P., Boerema, A., Bruckers, L., Clerinx, J., Davin, E. L., De Boeck, H. J., De Dobbelaer, T., Dondini, M., De Laender, F., Ellers, J., Franken, O., Gilbert, L., Gudmundsson, L., Janssens, I. A., Johnson, D. & 25 others, Lizin, S., Longdoz, B., Meire, P., Meremans, D., Milbau, A., Moretti, M., Nijs, I., Nobel, A., Pop, S., Puetz, T., Reyns, W., Roy, J., Schuetz, J., Seneviratne, S. I., Smith, P., Solmi, F., Staes, J., Thiery, W., Thijs, S., Vanderkelen, I., Van Landuyt, W., Verbruggen, E., Witters, N., Zscheischler, J. & Vangronsveld, J., 28 Oct 2019, In : Nature Climate Change. 9, 11, p. 809-816 8 p.

Research output: Contribution to journalArticle

climate change
environmental constraint
ecosystem
experiment
experimental design
1 Downloads (Pure)

Universal regularization methods: varying the power, the smoothness and the accuracy

Cartis, C., Gould, N. I. & Toint, P. L., 1 Jan 2019, In : SIAM Journal on Optimization. 29, 1, p. 595-615 21 p.

Research output: Contribution to journalArticle

Open Access
File
Regularization Method
Smoothness
Convergence of Algorithms
Trust Region
Nonconvex Optimization

Un langage pour décoder le monde

Lambert, D., Sep 2019, In : La Recherche. 31, p. 15-19

Research output: Contribution to journalArticle

Well-posedness of infinite-dimensional linear systems with nonlinear feedback

Hastir, A., Califano, F. & Zwart, H., Jun 2019, In : Systems and Control Letters. 128, p. 19-25 7 p.

Research output: Contribution to journalArticle

Nonlinear feedback
Closed loop systems
Partial differential equations
Linear systems
Hamiltonians
2018
10 Downloads (Pure)
Open Access
File
group velocity
electromagnetic fields
photonics
Maxwell equation
crystals
9 Downloads (Pure)

A minimally invasive neurostimulation method for controlling abnormal synchronisation in the neuronal activity

Asllani, M., Expert, P. & Carletti, T., 9 Jul 2018, In : PLOS Computational Biology. 14, 7, 18 p., e1006296.

Research output: Contribution to journalArticle

Open Access
File
Synchronization
brain
Neuron
neurons
group process
10 Downloads (Pure)

A multi-scale fine-grained LUTI model to simulate land use scenarios in Luxembourg

Gerber, P., CARUSO, G., Cornelis, É. & MÉDARD de CHARDON, C., 22 Feb 2018, In : Journal of Transport and Land Use. 11, 1, p. 255-272 17 p.

Research output: Contribution to journalArticle

Open Access
File
Luxembourg
Land use
land use
scenario
real estate market
6 Downloads (Pure)

A note on preconditioning weighted linear least-squares with consequences for weakly constrained variational data assimilation

Gratton, S., Selime, G., Simon, E. & Toint, P., Apr 2018, In : Quarterly Journal of the Royal Meteorological Society. 144, 712, p. 934-940 7 p.

Research output: Contribution to journalArticle

File
Data Assimilation
Linear Least Squares
Weighted Least Squares
Preconditioning
data assimilation