Publications

• Pré-publication, Document de travail

Asymptotic analysis for covariance parameter estimation of Gaussian processes with functional inputs

Lucas Reding, Andrés Felipe López-Lopera, François Bachoc

We consider covariance parameter estimation for Gaussian processes with functional inputs. From an increasing-domain asymptotics perspective, we prove the asymptotic consistency and normality of the maximum likelihood estimator. We extend these theoretical guarantees to encompass scenarios…

2024. ⟨hal-04559892⟩

• Pré-publication, Document de travail

Estimation of subcritical Galton Watson processes with correlated immigration

Landy Rabehasaina, Yacouba Boubacar Mainassara

We consider an observed subcritical Galton Watson process $\{Y_n,\ n\in \mathbb{Z} \}$ with correlated stationary immigration process $\{\epsilon_n,\ n\in \mathbb{Z} \}$. Two situations are presented. The first one is when $\mbox{Cov}(\epsilon_0,\epsilon_k)=0$ for $k$ larger than some $k_0$: a…, Nous considérons un processus observé de Galton Watson $\{Y_n,\ n\in \mathbb{Z} \}$ avec immigration modélisé par un processus corrélé $\{\epsilon_n,\ n\in \mathbb{Z} \}$. Nous présentons des résultats d’estimation du taux de reproduction et l’espérance de l’immigration dans deux situations. La…

2024. ⟨hal-04549758⟩

• Poster de conférence

Processus de fabrication de pièces céramiques piézoélectriques par FDM, Piezoelectric ceramic parts manufacturing process by FDM

Soufyane Satha, Aymen Mohamed Ben achour, Mohamed Rguiti, Christian Courtois

L'objectif de notre étude est la fabrication de structures piézoélectriques complexes en 3d en céramiques et composites sans plomb, pour des applications capteurs et transducteurs à l’aide de la technique fused deposition modeling “FDM”. Cette technique consiste en l’extrusion à chaud d’un…, The objective of our study is the fabrication of complex 3D piezoelectric structures in lead-free ceramics and composites, for sensor and transducer applications using the fused deposition modeling “FDM” technique. This technique consists of the hot extrusion of a thermoplastic filament consisting…

Mardi des chercheurs 2024, Mar 2024, Mons, Belgique. ⟨10.1016/j.scriptamat.2024.115994⟩. ⟨hal-04544805⟩

• Pré-publication, Document de travail

Frequency-explicit stability estimates for time-harmonic elastodynamic problems in nearly incompressible materials

Théophile Chaumont-Frelet, Serge Nicaise

2024. ⟨hal-04500252⟩

• Article dans une revue

Virome release of an invasive exotic plant species in southern France

Oumaima Moubset, Denis Filloux, Hugo Fontes, Charlotte Julian, Emmanuel Fernandez, Serge Galzi, Laurence Blondin, Sélim Ben Chehida, Jean-Michel Lett, François Mesléard, Simona Kraberger, Joy M Custer, Andrew Salywon, Elizabeth Makings, Armelle Marais, Frédéric Chiroleu, Pierre Lefeuvre, Darren P Martin, Thierry Candresse, Arvind Varsani, Virginie Ravigné, Philippe Roumagnac

The increase in human-mediated introduction of plant species to new regions has resulted in a rise of invasive exotic plant species (IEPS) that has had significant effects on biodiversity and ecosystem processes. One commonly accepted mechanism of invasions is that proposed by the enemy release…

Virus Evolution, 2024, 10 (1), pp.veae025. ⟨10.1093/ve/veae025⟩. ⟨hal-04562106⟩

• Article dans une revue

Densification of hydroxyapatite through cold sintering process: Role of liquid phase chemistry and physical characteristic of HA powder

Muthusundar Kumar, Mohamed Aymen Ben Achour, Marie Lasgorceix, Paulo Quadros, Rosica Mincheva, Jean-Marie Raquez, Anne Leriche

Hydroxyapatite is a well-known bioactive material widely employed in bone regeneration applications. Densifying hydroxyapatite at the nanoscale remains challenging with conventional sintering methods. This investigation focuses on the densification of commercially available nano-hydroxyapatite…

Open Ceramics, 2024, 17, ⟨10.1016/j.oceram.2024.100566⟩. ⟨hal-04542434⟩

• Pré-publication, Document de travail

Sur les suites des descendants d'un polygone

Aziz El Kacimi Alaoui, Abdellatif Zeggar

Soient P = [A_1 , ..., A_n ] un n-polygone (avec n ≥ 4) du plan euclidien E et λ un réel dans l'intervalle ]0, 1[. On note P_1 = [A′_1 , • • • , A′_n ] le n-polygone dont les sommets A′_1 , • • • , A′_n sont les λ-barycentres A′_k = (1-λ)A_k + λA_{k+1} , avec 1 ≤ k ≤ n et A_{n+1} = A_1 ; on…

2024. ⟨hal-04444952⟩

• Article dans une revue

Goal-oriented error estimation based on equilibrated flux reconstruction for the approximation of the harmonic formulations in eddy current problems

Emmanuel Creusé, Serge Nicaise, Zuqi Tang

In this work, we propose an a posteriori goal-oriented error estimator for the harmonic A/Phi formulation arising in the modeling of eddy current problems, approximated by nonconforming finite element methods. It is based on the resolution of an adjoint problem associated with the initial one. For…

IMA Journal of Numerical Analysis, 2024, ⟨10.1093/imanum/drad107⟩. ⟨hal-03954215v2⟩

• Poster de conférence

Control of the preferential orientation of the growth of Sr2TiSi2O8 crystals in glass ceramics obtained by crystallization of parent glasses from the SrO – TiO2 – SiO2 – K2O – Al2O3 system

Oussama Zwein, Maurice Gonon, Marc Duquennoy, Rıdvan Yildiz, Sandra Abdelouhab

Belgian Ceramic Society (BCERS) day, Dec 2023, Louvain (Leuven), Belgium. ⟨hal-04429470⟩

• Communication dans un congrès

Cold Sintering Process for developing hydroxyapatite ceramic and polymer composite

Muthusundar Kumar, Mohamed Aymen Ben Achour, Marie Lasgorceix, Rosica Mincheva, Jean-Marie Raquez, Anne Leriche

Cold sintering process (CSP) is a non-conventional, low-energy sintering technique that promotes the densification of ceramics in the presence of transient liquids under low temperatures (≤300°C) and pressures (≤500 MPa). Additionally, it provides a new strategy for the co-sintering of ceramic and…

BioCAM Workshop, Dec 2023, Mons, Belgium. ⟨hal-04393180⟩