The #ModConFlex researcher team is finally complete.

To meet all our researchers, visit https://modconflex.uni-wuppertal.de/de/modconflex-researchers/

#HorizonEU
#MSCA

New paper by #ModConFlex researcher Zhuo Xu on the robustness of a fluid-particle interaction system.

"A distinctive feature, not yet considered in the ISS literature, is that our system involves a free boundary. More precisely, the fluid is described by the viscous Burgers equation, and the motion of the particle obeys Newton second law. ... The proof is based on the construction of a Lyapunov functional derived from a special test function."

https://arxiv.org/abs/2505.08393

#PDE

#MSCA
#HorizonEU

#ModConFlex researcher Vicente Ocqueteau co-authored a study of small oscillations of a floating cylinder:

"On an Initial Value Problem Describing the Small Oscillations of a Floating Cylinder" (V.Ocqueteau and M.Tucsnak) establishes #existence, #uniqueness and #regularity results for the #solutions of the governing #equations.

https://arxiv.org/abs/2504.20523

#wellposedness
#waterwaves
#floatingbodies
#floatingWindTurbines

#MSCA #HorizonEU

Several PhD students and supervisors from the #ModConflex #EUhorizon #MSCA project met at the Spring School on Theory and Applications of Port-Hamiltonian Systems (PHS2025) last week.

The PhD students presented and discussed posters of their work. The supervisors presented, too, and the project coordinator was also involved in the organisation.

For program details and some more photos, see https://www.epc.ed.tum.de/rt/phs2025/

Paper on global #exponential #stabilization (including the position of the particle) for fluid-particle interaction system: design of a PD control acting on the particle.

by #ModConFlex researcher Zhuo Xu and his supervisor Marius Tucsnak.

#globalStabilization
#globalWellPosedness

https://arxiv.org/abs/2501.11446

As of today, we have 12 papers by #ModConFlex researchers on our website.

That is on average one paper every two months since the start of our #MSCA project - great. Thanks to everyone for their contribution!

https://modconflex.uni-wuppertal.de/en/publications

#HorizonEU

How can a central server effectively use a limited reward budget to motivate distributed clients to cooperate?

*A Potential Game Perspective in Federated Learning* explores this multi-agent interaction and decision-making problem through economic and game-theoretic perspectives:

https://arxiv.org/abs/2411.11793

#gametheory
#federatedlearning

#ArtificialIntelligence
#MachineLearning

#HorizonEU
#ModConFlex

Useful e.g. to build data-driven floating wind turbine models from distributed data.

The first #ModConFlex network meeting took place in November 2023 @utwente .

12 freshly hired Researchers (PhD students) and their supervisors plus a few more project participants met for the first time at the University of Twente.

After a day of meetings with lively discussions also during the breaks the day was concluded by a cozy dinner at the conference venue.

The Researchers stayed on for five additional days of learning.
Videos / slides available:

https://modconflex.uni-wuppertal.de/de/teaching-modconflex

#HorizonEU

Last 2024 publication within the #ModConFlex project:

"LQR control for a system describing the interaction between a floating solid and the surrounding fluid" on #mathematics of #solid moving on the #sea and #control acting on the solid.

Co-authored by #ModConFlex #MSCA researcher Zhuo Xu and published in Mathematical Control and Related Fields:

https://www.aimsciences.org//article/doi/10.3934/mcrf.2024039

Congratulations to Zhuo for his first #publication !

#controltheory

#offshorewind
#floatingwindfarms

"FedADMM-InSa: An inexact and self-adaptive ADMM for federated learning" by Yongcun Song, Ziqi Wang and Enrique Zuazua is published in the Jan 2025 edition of #NeuralNetworks.

#FederatedLearning
#ADMM
#InexactnessCriterion
#ClientHeterogeneity

Congratulations!

#EUhorizon
#MSCA
#ModConFlex

https://www.sciencedirect.com/science/article/pii/S0893608024006968

#ModConFlex researcher Alan Valadez co-authored *stability analysis for multi-machine power systems with constant power loads*.

It provides valuable tools to analyze systems with distributed loads and advances understanding of dynamic models in modern power systems. Findings can be applied to, e.g., distributed power systems of offshore wind, offering insights into stability and operation.

#PowerSystems #StabilityAnalysis #HorizonEU #EnergyResearch #OffshoreWind

https://ieeexplore.ieee.org/document/10667373

We had an inspiring and productive annual Network and Training meeting at Anglet, France, in June:

https://www.uni-wuppertal.de/en/news/detail/start-of-international-training-programme-for-young-researchers-officially-confirmed/

#HorizonEU
#MSCA
#ModConFlex

Congratulations to #MSCA-Researcher Maddalen Irigoien, the winner of the #ModConFlex presentation prize 2024!

Maddalen's research focus is on modelling floating wind turbines. She started with the #mathematical groundwork in December 2023.

All #ModConFlex Researchers delivered excellent presentations at our 2024 #NetworkMeeting and we are happy to have such promising researchers on board of our #HorizonEU project.

#ControlTheory

#OffshoreWind
#OffshoreWindEnergy
#FloatingWindFarms

New paper on #mathematics of #solid moving on the #sea and #control acting on the solid. Co-authored by #ModConFlex #MSCA researcher Zhuo Xu: "LQR control for a system describing the interaction between a floating solid and the surrounding fluid".

#WindEnergy
#floatingwindfarms
#offshorewind
#offshorewindenergy

https://modconflex.uni-wuppertal.de/en/publications
https://arxiv.org/abs/2406.08072

#ModConFlex Researcher Kaja Khrač co-authored a paper on #PortHamiltonian systems with #EnergyPorts and #PowerPorts.

#EnergyPorts are conjugated variables with respect to the canonical symplectic form, whereas #PowerPorts are dual variables. Introducing port-Hamiltonian systems with energy ports allows us to treat constrained and input-output Hamiltonian systems under the same hat. 

https://arxiv.org/abs/2405.01241

#ModConFlex #MSCA researcher Ziqi Wang is a co-author of "FedADMM-InSa: An Inexact and Self-Adaptive ADMM for Federated Learning" Federated learning (FL) emerges as a promising framework for #Learning from #DistributedData while preserving privacy. It is useful in the #WindEnergy sector. For instance, it enables #CollaborativeTraining of #WindPower #ForecastingModels among multiple #WindFarms, overcoming challenges associated with #DataPrivacy and #CommercialCompetition.

https://arxiv.org/pdf/2402.13989.pdf

A subgroup of the #ModConFlex project gathered at the workshop of the French-Dutch-German Doctoral College on Port-Hamiltonian Systems at Toulouse.

#MSCA Researcher Kaja Krhač presented her research on the #PortHamiltonian system defined with energy ports.

Hans Zwart from utwente@social.edu.nl gave a talk on the Riesz basis for port-Hamiltonian systems and Birgit Jacob from Wuppertal uni introduced the Topical Activity Group on Dissipative and #PortHamiltonian Systems of the @EuroMathSoc