Academic literature on the topic 'Approches expérimentales et numériques'
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Journal articles on the topic "Approches expérimentales et numériques"
Studer, Etienne, Danièle Abdo, Sonia Benteboula, Gilles Bernard-Michel, Nadia Coulon, Frédéric Dabbene, Sergey Kudriakov, et al. "Sûreté des réacteurs : la connaissance du risque hydrogène enrichie de 20 ans de R&D." Revue Générale Nucléaire, no. 1 (January 2018): 48–53. http://dx.doi.org/10.1051/rgn/20181048.
Full textTalbot, Martin, Jean-François Laflamme, and Marc Savard. "Approches expérimentales et numériques pour l'analyse dynamique d'un pont routier." Revue Européenne de Génie Civil 9, no. 1-2 (January 2005): 187–214. http://dx.doi.org/10.1080/17747120.2005.9692750.
Full textTalbot, Martin, Jean-françois Laflamme, and Marc Savard. "Approches expérimentales et numériques pour l'analyse dynamique d'un pont routier." Revue européenne de génie civil 9, no. 1-2 (February 28, 2005): 187–214. http://dx.doi.org/10.3166/regc.9.187-214.
Full textInal, K., and J. L. Lebrun. "Approches numériques et expérimentales du passage micro-macro dans des aciers austéno-ferritiques." Le Journal de Physique IV 08, PR4 (June 1998): Pr4–69—Pr4–74. http://dx.doi.org/10.1051/jp4:1998408.
Full textLacaze, J. "Formation des structures dans les fontes ferrito-perlitiques à graphite sphéroïdal : approches expérimentales, modélisation et simulations numériques." Revue de Métallurgie 93, no. 5 (May 1996): 641–56. http://dx.doi.org/10.1051/metal/199693050641.
Full textAndreux, Régis, Miriam Akiki, and Guillaume Jeanne. "Formulation de milieux et solutions pour les procédés Pharmaceutiques : extrapolation par Computational Fluid Dynamics et validation expérimentale." MATEC Web of Conferences 407 (2025): 05003. https://doi.org/10.1051/matecconf/202540705003.
Full textParent, Éric, Jean-Jacques Boreux, Étienne Rivot, and Sophie Ancelet. "Une expérience ludique de capture-marquage-recapture pour l’initiation au raisonnement probabiliste indispensable au statisticien modélisateur." Statistique et société 8, no. 2 (2020): 9–31. https://doi.org/10.3406/staso.2020.1123.
Full textGoldspiegel, Fabien, Philippe Michel, Jean-Baptiste Blumenfeld, Jean-Baptiste Oszenda, and Katia Mocellin. "Influence des effets dynamiques et thermiques sur l’assemblage par clouage." Matériaux & Techniques 106, no. 3 (2018): 305. http://dx.doi.org/10.1051/mattech/2018049.
Full textNGU, Vincent, Claire DUMAS, Yan RAFRAFI, Jérôme MORCHAIN, and Arnaud COCKX. "Développement d’un procédé de méthanation biologique à l’aide d’une approche de modélisation multi-échelle." Techniques Sciences Méthodes, TSM 5/ 2024 (May 20, 2024): 47–63. http://dx.doi.org/10.36904/20240547.
Full textClaracq, Ingrid, Michel Fayol, and Bruno Vilette. "Réduire les inégalités en résolution de problèmes. Travailler la compréhension avant les données numériques." L’Année psychologique Vol. 124, no. 1 (March 11, 2024): 47–77. http://dx.doi.org/10.3917/anpsy1.241.0047.
Full textDissertations / Theses on the topic "Approches expérimentales et numériques"
Crambuer, Romain. "Contribution à l'identification de l'amortissement : approches expérimentales et numériques." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2013. http://tel.archives-ouvertes.fr/tel-00957320.
Full textRupin, Matthieu. "Cavité réverbérante et résonateurs sub-longueur d'onde : approches numériques et expérimentales." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENY082/document.
Full textThis thesis is divided into two parts. First, we present a new technique for focusing waves with one emitter in reverberant cavity (OCIF) inspired by inverse filter algorithm. Through the experimental study of reverberant cavities in the field of ultrasound, we demonstrate the ability of the OCIF to optimize the focusing no matter what type of cavity (ergodic type or not). In a second part, we investigate the propagation of elastic waves in a system formed by a set of aluminum rods glued to a thin plate of the same material. These rods form a set of quasi-punctual resonators in the propagation plane of waves. It is possible to arrange them periodically or randomly on a subwavelength scale. The metamaterial thus formed shows a complex wave field within it, including the presence of wide prohibited frequency ranges (bandgaps). The experimental and numerical approaches described in this manuscript show the existence of both flexural and compressional resonances in the resonators. Added to the presence of a conversion of a portion of the energy from the $A0$ Lamb mode to the $S0$ one in the plate, such a complexity makes this type of metamaterials, quite unusual objects at the mesoscopic scale
Guinot, Florent. "Interactions houle-courant en bathymétrie variable : approches numériques et expérimentales." Brest, 2010. http://www.theses.fr/2010BRES2069.
Full textMarais, Louise. "Caractérisation mécanique de la paroi artérielle pathologique : approches expérimentales et numériques." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC0084.
Full textVascular pathologies are generally accompanied by a remodeling of the arterial wall that may lead to modifications of its stiffness and mechanical behavior. The goal of this thesis is to propose methods of mechanical characterization allowing to detect the changes in arterial mechanical properties in the case of two pathologies: abdominal aortic aneurysm (AAA) and arterial hypertension (HTA). The first study consisted in evaluating in vitro the arterial functional modifications in the case of an AAA obtained by the rat xenograft model which reproduces several biological features of the human pathology and is used to develop cell therapies. First, the assessment of regional variations in mechanical properties of aneurysmal tissue was conducted by carrying out traction tests on rings from AAAs. Then, extension-inflation tests were conducted on the vascular structure for loading conditions replicating those observed in vivo. In each case, an inverse method associated with a numerical finite element model was developed to identify the material parameters of vascular tissue. In the second study, arterial stiffness was measured in vivo for a population of hypertensive patients and healthy subjects using two non-invasive methods which were developed and optimized: ultrafast imaging of the pulse wave and shear wave elastography of the arterial wall. These two methods are based on an ultrafast ultrasound scanner. Thus the local pulse wave velocity on a segment of the carotid artery was assessed, as well as the propagation speed of shear waves created in the arterial wall at several moments during the cardiac cycle. Both in vitro and in vivo approaches enabled to evaluate some changes in mechanical properties of the arterial wall in pathological cases. Although all the biological mechanisms of AAA and HTA are complex, this work provides a contribution to a better understanding of vascular pathologies and can thereby assist in the choice or development of adapted treatments, from both a pharmacological point of view, and within the context of new cell therapies
Nguyen, Tuan Anh. "Approches expérimentales et numériques pour l'étude des transferts hygroscopiques dans le bois." Thesis, Limoges, 2014. http://www.theses.fr/2014LIMO0034/document.
Full textIn civil engineering constructions, the development of timber structures requires today to managers works some diagnostic tools and monitoring systems to monitor pathologies (excessive deflections, cracks, biological attack, etc.) but also to control moisture content in the element sections. In the last context, the proposed work in this PhD thesis is the development of a tool for characterization of the moisture content map in the cross sections of structural elements. Studied method is based on the resistivity measuring, comprising a measuring head (resistivity meter) associated with many connected probes in a multiplexed system, and an inverse method implemented in a finite element software. In the first part, it is studied the techniques of characterization of diffusion properties in wood samples characterized by orthotropic and nonlinear behaviors according to average moisture content measurements (gravimetric method) and spatial profiles gamma densitometer measures. It is shown that the coupling of the two measurements provides the intrinsic properties with more reliability and more robustness. The second part deals with the development of an experimental protocol in order to achieve 1D and 2D mapping of the moisture content field in a cross section. The technique is based on the generalization of multiplexed resistivity geophysical methods used in the study of stratified soils with 2-dimensional geometries. The algorithm is based on the coupling between the resistivity measurements and an inverse multiplexed analysis implemented in a finite element code. The 1D solution provides spatial profiles which can replace gamma densitometer measures. For a selected section, 2D profiles allow estimating the moisture content field at any point and thus provide a time tracking of moisture profiles
Amaied, Emna. "Effet du vieillissement cutané sur la perception tactile : approches expérimentales et numériques." Lyon, Université de Lyon, 2016. http://www.theses.fr/2016LYSEE003.
Full textThe aim of this thesis is to study the effect of aging on the viscoelastic properties of the finger and the tactile perception. The understanding of tactile perception related to age requires further development of experimental and Numerical approaches. The skin tissue as sensory organ is presented. To asses the effect of age and gender effect, an xperimental device designed and producted in the laboratory is used. This device allows soliciting the skin of the finger in vivo, with a controlled air pressure and identifying the viscoelastic parameters. This expérimental study allowed calculating of the mechanical properties of the finger pad. The experimental study is accompanied with a multilayer axisymmetric two-dimensional FEM model of the human finger developed to reproduce the test creep. This model was used to calculate the instantaneous modulus of elasticity of each layer of the finger by a reverse approach. An experimental study of tactile acuity was conducted of the human finger. This shows a deficit of tactile acuity of aged subjects. This study identified the threshold of tactile acuity in each age group and allowed the understanding of the interactions of the sensory receptors with the stimulus. The study of the effect of aging on the active touch with an experimental approach was conducted. An innovative device developped in the laboratory, was used to quantify vibrations induced when a human finger explores a textured surface. These vibrations are the source of excitation of sensory receptors and have a big role in the sensation of active touch. The effect of age shows a significant decrease in vibration level. The numerical study in the last chapter was used to study for the first time the deficit due to aging in terms of vertical and special resolutions of textured surfaces
Sinou, Jean-Jacques. "Dynamique non-linéaire des structures complexes, fixes et tournantes. Approches théoriques, numériques et expérimentales." Habilitation à diriger des recherches, Ecole Centrale de Lyon, 2007. http://tel.archives-ouvertes.fr/tel-00260913.
Full textDans une première partie, le rôle joué par les phénomènes non-linéaires en dynamique des structures et le développement de méthodes non-linéaires sont illustrés à travers trois axes de recherche.
Le premier axe porte sur la stabilité et la dynamique non-linéaire des systèmes frottants. On se propose de déterminer les zones stables et instables, ainsi que les niveaux vibratoires lorsque le système dynamique non-linéaire est sujet à une instabilité de type flottement. Pour ce faire, des approches se basant sur des réductions et/ou approximations des solutions sont développées et validées sur des exemples industriels (freins automobile et aéronautique).
Le deuxième axe se focalise sur la détection des fissures dans les systèmes tournants et cherche à définir des critères de détection des fissures se basant sur les réponses dynamiques non-linéaires (résonances sous-harmoniques, ordres, orbites, interaction fissure-balourds,...). Des approches théoriques, numériques et expérimentales sont menées en parallèle afin de statuer sur la pertinence et la robustesse des critères proposés.
Le troisième axe s'intéresse à la problématique de la dynamique non-linéaire des systèmes mono et bi rotor à travers des approches numériques et expérimentales. Ces recherches proposent de statuer sur la prise en compte des phénomènes non-linéaires et de la modélisation des organes associés lors du dimensionnement des systèmes tournants à partir de l'étude du comportement vibratoire (diagramme de Campbell, réponses non-linéaires et orbites, évolution des ordres,...).
Dans un second temps, l'accent est porté sur les perspectives de recherches et sur les ouvertures scientifiques envisageables sur des thématiques transversales.
Compère, Fabrice. "Transport et rétention de particules argileuses en milieu poreux saturé : approches expérimentales et numériques." Poitiers, 1999. http://www.theses.fr/1999POIT2301.
Full textDiouf, Abdou khadre. "Approches numériques et expérimentales pour l’étude des écoulements dans les laboratoires géologiques sur puce (GLoCs)." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0951/document.
Full textThis thesis work is included within the ANR CGS µLab projet, which aims to understand thefundamental mechanisms involved in the deep storage processes of CO2 from on-chip geological laboratories(GLoCs - geological labs on chip) to reproduce the pressure and temperature conditionsof deep geological environments. Besides experimental understanding, the contribution of numericalmodeling approaches appears essential in order to define models allowing to predict in particularthe maximum storage capacities based on the characteristics of the reservoirs (porosity, permeability,temperature, pressure, geochemistry), and the injection process (flow rate, composition). In thiscontext, this work has two main goals : (i) to associate experimental imaging and numerical modelingto simulate non-reactive flows in model porous media on chip ; and (ii) to follow experimentally thestructural evolution of a 3D porous medium undergoing a reactive flow. In order to address to thesegoals, the approach we have proposed is divided into two parts. In the first part, we carried out the3D modeling of the permeabilities of GLoCs by taking volume averaging. To do this, we first verifiedthe behavior of a GLoC according to its number of plots rows by studying a diffusion problem ona nested mesh that we have implemented from a GLoC binary image to reduce computation time.Then, we updated our permeability code, which solves the closure problem of flow, by analyticallycalculating in 3D the stability criterion that takes into account the anisotropy of GLoC geometry. Wethen processed the 2D digital images of the GLoCs before proceeding with the generation of their3D representative elementary volumes. Finally, we have simulated the permeabilities of GLoCs beforecomparing them with the experimental results and those obtained with the PHOENICS software. In asecond part, we have developed an experimental set-up to recreate 3D reactive porous media within amicrofluidic channel (fixed packed bed of calcium carbonate - CaCO3 microparticles). Using the X-raylaminography of the ESRF line ID19, we have observed on reconstructed 2D images the dissolutionphenomena occurring during the successive injection of constant volumes of non-equilibrium solution.This proof of concept has opened new possibilities for using this methodology to acquire kinetic dataon reactive front phenomena in porous media
Jaisle, Nicolas. "Contraindre la fusion partielle dans les intérieurs planétaires en combinant les approches numériques et expérimentales." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALU013.
Full textThe study of partial melting processes in planetary interiors is of prime importance to understand planetary evolution mechanisms. This is even more true when considering the increasing number of exoplanetary discoveries which likely acknowledged a high variety of histories. A main experimental tool for to study deep planetary interior conditions is the diamond anvil cell (DAC), allowing to raise pressures on micron-sized samples up to hundreds of GPa and at temperatures up to thousands of Kelvins. The study of sample’s physical properties such as their phase change pressures and temperatures (P,T) can be analyzed in X-ray generating synchrotron facilities, using the X-ray diffraction (XRD) properties of minerals. Those experiments may yet suffer from the continuous laser heating technique which generates strong temperature gradients within the samples and may lead to chemical migration in the heated zone. The sample in-situ analysis is then achieved on a composition diverging from the initial one which does not necessarily correspond to what was intended to be measured. This thesis suggests a new experimental approach consisting in using a short and intense (250 ns) laser heating pulse in order to limit that chemical migration. This experimental setup was tested on iron alloys of the Fe-Si-O ternary system, results on such compositions being for instance applicable on in the context of Earth’s liquid outer core crystallization. Our experiments are run at the European X-ray Free Electron Laser (EuXFEL) facility which generates a high brilliance pulsed X-ray source (series of 30 fs pulses at frequencies up to 4.5 MHz (one pulse each 221.5 ns). Combined to the µs fraction laser heating, the EuXFEL experiments allow to obtain a temporal resolution of the sample evolution during its cooling, allowing to observe crystallization sequences. A streak optical pyrometry (SOP) surface temperature measurement is achieved simultaneously to the XRD with time resolution below the µs-scale. However, measurements achieved at the EuXFEL do not allow to fully resolve the extent of the phenomena occurring during experiments. To compensate this lack of information, we developed a numerical model based on the finite element method (FEM) to reproduce the achieved experiments. This model uses the material properties (such as ρ, K, G, κ, Cp and latent heat) at the experimental pressure and temperature conditions including their P,T dependencies when available. Equations of state (EoS) related variations where included in the model for the related parameters. To reproduce the experiments, the model values are adjusted by minimizing the mean error compared to the SOP data. Combining experimental XRD with best-fitting model temperatures, it is possible to get back to the P, T conditions during the samples phase change. In addition, the FEM furnishes temperature and pressure maps highlighting e.g. sample internal gradients and allowing to evaluate the degree of homogeneity of P and T, both assumed to be critical parameter in chemical migration. Models allow as well to calculate the constraint distribution in the DAC assemblage which can be an important factor in certain conditions. Finally, experiments directly using X-rays to heat the sample were achieved, analyzed and reproduced by modelling. Using the models, the possibility of deducing material properties such as thermal conductivity from best fits to experimental data are explored
Books on the topic "Approches expérimentales et numériques"
Association canadienne-francaise pour l'avancement des sciences. Congrès. Les techniques d'intelligence artificielle appliquées aux technologies de l'information: Réflexions sur les approches neuroniques, symboliques et numériques appliquées à la vision, l'écrit, la parole et le biomédical : actes du Colloque multidisciplinaire L'intelligence artificielle dans les technologies de l'information tenu dans le cadre du Congrès de l'Acfas à Montréal en mai 1996. Montréal: ACFAS, 1997.
Find full textNevejans, Nathalie. Données et technologies numériques: Approches juridique, scientifique et éthique. MARE MARTIN, 2021.
Find full textCaen, Université de, ed. Approches spatialisées et analyses expérimentales des phénomènes de ruissellement et d'érosion des sols: Application aux systèmes de production agricole du Calvados. 1992.
Find full textBook chapters on the topic "Approches expérimentales et numériques"
Savatovsky, Dan, and Thị Kiều Ly Phạm. "Maurice Grammont et la musique du cochinchinois : les débuts de la tonétique expérimentale." In Documenter et décrire les langues d’Asie : histoire et épistémologie, 137–64. Paris: Société d’histoire et d’épistémologie des sciences du langage, 2025. https://doi.org/10.4000/138nc.
Full textDettling, Valentin, Marion Voillot, Lisa Jacquey, and Laboratoire Psitec. "La petite enfance au prisme du divers." In La petite enfance au prisme du divers, 143–60. Presses universitaires de Grenoble, 2024. http://dx.doi.org/10.3917/pug.azaou.2024.01.0143.
Full textGIGLIOTTI, Marco, Yannick PANNIER, and Jean-Claude GRANDIDIER. "Vieillissement thermo-oxydant de matériaux composites pour applications aéronautiques." In Vieillissement des polymères industriels 2, 131–47. ISTE Group, 2025. https://doi.org/10.51926/iste.9190.ch7.
Full textAMBROSANIO, Michele, Martina Teresa BEVACQUA, Tommaso ISERNIA, and Vito PASCAZIO. "Imagerie électromagnétique des données GPR : théorie et expériences." In Radar à pénétration de sol, 9–40. ISTE Group, 2025. https://doi.org/10.51926/iste.9157.ch1.
Full textCHATELIN, Simon, Philippe GARTEISER, and Bernard E. VAN BEERS. "Biomécanique du foie : caractérisations, modélisations et applications cliniques." In Mécanique des tissus vivants, 27–59. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9160.ch1.
Full textGAILLER, Lydie, Jean-François LÉNAT, and Philippe LABAZUY. "Surveillance électrique et électromagnétique des volcans." In Aléas et surveillance de l’activité volcanique 3, 263–83. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9046.ch5.
Full textTHOURET, Jean-Claude, and Sylvain CHARBONNIER. "Évaluation, zonage et modélisation des aléas volcaniques." In Aléas et surveillance de l’activité volcanique 1, 159–92. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9043.ch3.
Full textBARATS, Christine, and Julia BONACCORSI. "Du Web à l’observable complexe : approches sémio-discursives." In Analyses des sites web, 39–65. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9103.ch2.
Full textVERRIER, Nicolas, Matthieu DEBAILLEUL, Bertrand SIMON, and Olivier HAEBERLÉ. "Microscopie tomographique diffractive en transmission." In Imageries optiques non conventionnelles pour la biologie, 143–75. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9132.ch5.
Full textWEBER, Harald. "La contribution des technologies numériques à l’accessibilité des environnements d’apprentissage." In L’accessibilité ou la réinvention de l’école, 123–43. ISTE Group, 2021. http://dx.doi.org/10.51926/iste.9011.ch6.
Full textConference papers on the topic "Approches expérimentales et numériques"
Pons, Frédéric, François Sabatier, Jean-Michel Tanguy, and Adrien Lambert. "Morphodynamiques des dunes sous l'effet du vent : approches expérimentales et numériques." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2002. http://dx.doi.org/10.5150/jngcgc.2002.020-p.
Full textLubin, Pierre, Stéphane Vincent, Sthéphan T. Grilli, Richard W. Gilbert, Déborah Drevard, Vincent Rey, Philippe Fraunié, et al. "Simulations numériques et expérimentales d’un soliton se propageant sur une plage inclinée." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2004. http://dx.doi.org/10.5150/jngcgc.2004.049-l.
Full textBENOIT, Michel, Alexis BEUDIN, Julien DALLE, Olivier KIMMOUN, Fabien REMY, Benoit WAELES, and Philippe BLANC. "Etudes expérimentales et numériques de la propagation des vagues à travers un réseau de cylindres verticaux en vue de la conception d'un système atténuateur de houle inspiré des racines de mangrove." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2020. http://dx.doi.org/10.5150/jngcgc.2020.044.
Full textReports on the topic "Approches expérimentales et numériques"
Hearson, Martin, Philip Mader, Mary Abounabhan, Marco Carreras, Awa Diouf, Adrienne Lees, Hannelore Niesten, Fabrizio Santoro, and Christopher Wales. Taxer l’argent mobile en Afrique : risques et avantages. Institute of Development Studies, September 2024. http://dx.doi.org/10.19088/ictd.2024.094.
Full textLanglais, Pierre-Carl. Bibliométrie. Comité pour la science ouverte, 2024. https://doi.org/10.52949/74.
Full textNaffi, Nadia, Ann-Louise Davidson, and Didier Paquelin. Perturbation dans et par les bureaux de soutien à l’enseignement pendant la pandémie COVID-19: Innover pour l'avenir de l'enseignement supérieur. Observatoire international sur les impacts sociétaux de l’intelligence artificielle et du numérique, September 2020. http://dx.doi.org/10.61737/dmbr6218.
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