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Статті в журналах з теми "Modélisation de distorsion"
Alliau, Damien, Sébastien Roux, and Léa Parelle. "Apports de la modélisation physique avec distorsions pour l'analyse des cours d'eau sableux : exemple de la Loire aval." La Houille Blanche, no. 2 (April 2020): 14–33. http://dx.doi.org/10.1051/lhb/2020013.
Повний текст джерелаDecaluwé, Bernard, André Lemelin, David Bahan, and Nabil Annabi. "Taxation et mobilité partielle du capital dans un modèle d'équilibre général calculable statique birégional du Québec et du reste du Canada." Articles 87, no. 2 (January 20, 2012): 175–203. http://dx.doi.org/10.7202/1007620ar.
Повний текст джерелаLacambre, M. "Clinique et prise en charge des Auteurs de Violences Sexuelles." European Psychiatry 29, S3 (November 2014): 635. http://dx.doi.org/10.1016/j.eurpsy.2014.09.150.
Повний текст джерелаДисертації з теми "Modélisation de distorsion"
Béra, Jean-Christophe. "Produits de distorsion acoustiques auditifs : modélisation cochléaire et mesure." Ecully, Ecole centrale de Lyon, 1993. http://www.theses.fr/1993ECDL0023.
Повний текст джерелаCherif, Iheb. "Modélisation et validation expérimentale de la distorsion de plaques usinées." Thesis, Paris, ENSAM, 2019. http://www.theses.fr/2019ENAM0040.
Повний текст джерелаHeat exchangers used in new nuclear power generation plants are made of AISI 316L stainless steel plates stacked in order to improve their efficiency and compactness. During the plates production, residual stresses appear and could cause distortion. To ensure the assembly, this distortion must be controlled and minimized, mainly by controlling the evolution of the residual stress field. Residual stresses generated by manufacturing processes preceding machining were measured using various methods. Then, the obtained residual stresses distributions were integrated into a developed model to predict part distortion, considering the clamping and machining sequence effects. Experimental validation was carried out using a smart experimental device with force sensors integrated in a clamping system was developed. The influence of machining conditions on the plate distortion was also studied using this set-up. Finally, the developed model was used to optimize the machining strategy in order to minimize the distortion
Kassab, Rabih Kamal. "Modélisation par la méthode des éléments finis des distorsion dues au soudage d'un joint en T." Mémoire, École de technologie supérieure, 2007. http://espace.etsmtl.ca/231/1/KASSAB_Rabih_Kamal.pdf.
Повний текст джерелаDolganov, Rostislav. "Développement d'un modèle LES basé sur la théorie de la distorsion rapide." Phd thesis, Ecole Centrale de Lille, 2009. http://tel.archives-ouvertes.fr/tel-00577098.
Повний текст джерелаColin, Yann. "Simulation numérique de la distorsion générée par une entrée d'air de moteur civil par vent de travers." Toulouse, ISAE, 2007. http://www.theses.fr/2007ESAE0013.
Повний текст джерелаBelhadj, Youssef Nesrine. "Modélisation et commande des redresseurs triphasés fonctionnnant à haut rendement et à faible taux de distorsion harmonique : application au redresseur triphasé de Vienne." Mémoire, École de technologie supérieure, 2007. http://espace.etsmtl.ca/244/1/BELHADJ_YOUSSEF_Nesrine.pdf.
Повний текст джерелаSchaefer, Pierre-Loup. "Reconstruction de la déformée d’une aiguille instrumentée." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAS025/document.
Повний текст джерелаMost of navigation system dedicated to interventional radiology make the assumption that needles stay straight during insertions in tissues. In practice, this hypothesis is not verified as the interactions between needles and surrounding tissues cause the needles to bend, resulting in a loss of accuracy. My PhD thesis is a part of the national projet GAME-D whose goal is to solve that problem by developing and studying instrumented needles which should eventually provide 3D deformed shape of the needle to clinicians in real-time. My reasearch work focus on reconstruction of deformed needle shape from its strain sensors data. Precision needed for clinical use faces technical limitations which restraint number of sensors embedded on the needle. Methods developped to adress this issue fall into one of these two categories: sensors data retrieving and sensors data processing. Use of beam theory to study sensors deformations gives strain information such as torsion. It also allows to develop reconstruction methods able to use these informations to gain accuracy. An optimization method of the sensors positions based on needle insertions experimental data is proposed. Sensors optimal positions make sensors data much more significant. A statistical processing of experimental data is performed to extract deformation features of needles in tissue. It is further used in a a specially built reconstruction method. Representativeness of these features improve the reconstrution of the deformed shape of the needle
Reveyrand, Tibault. "Conception d'un système de mesure d'enveloppes temporelles aux accès de modules de puissance : application à la mesure du NPR et à la modélisation comportementale d'amplificateurs." Limoges, 2002. http://www.theses.fr/2002LIMO0013.
Повний текст джерелаThis work deals with the characterization and the analysis of envelope distortions due to power amplifiers when they are driven by complex modulations
Hamoud, Houssam Eddine. "Linéarisation par pré-distorsion numérique d'amplificateurs de puissance pour les nouvelles générations des systèmes de télécommunications." Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0110.
Повний текст джерелаModern communications systems converge towards multi-standard operation combined with high PAPR modulation formats where the power amplifier must first be optimized in efficiency and where linearity will then be corrected by adding a predistorter. If this solution seems functional, it seems inadequate and ineffective on 5G systems where the targeted bandwidths pose both architectural problems (complexity of the observation path) and problems of accuracy of the usual behavioural models based on a simplification of the Volterra series in its discrete form (GMP, DDR) in the face of exacerbated memory effects but also of energy efficiency of the linearized system (DPD+PA). In this context, it becomes necessary to move towards a predistorter model less dependent on the characteristics of the signal to be linearized, in particular by the TPM (Two path Memory) model developed at XLIM, based on a simplification of the Volterra series in its continuous form, is independent of the characteristics of the signal to be linearized.Our work focused on evaluating the linearity performance of the classical models (GMP, DDR) and the TPM model on different power amplifiers either from simulations or from physical measurements of the PA. To do this, we have set up a simulation environmentand an evaluation bench for predistortion models with physical PA in order to quantify ACPR performance according to the variation in signal characteristics (power, frequency, statistics). All these experiments made it possible to verify, on the one hand,the poor robustness of traditional approaches (GMP/DDR) and, on the other hand, the stability of the performance of the TPM approach, whatever the scenario envisaged. This study therefore paves the way for a new generation of pre-distributor which, if extracted once and for all, would only require an update on slow dynamic phenomena (ageing) and would make it possible to consider a simplified architecture of the DPD observation path; thus improving the overall energy efficiency of the linearizedsystem
Chouman, Mehdi. "Plasticité cyclique et phénomène de rochet : amélioration de la prédiction de l’ovalisation des tubes en acier durant le cintrage cyclique par modélisation de la distorsion de la surface de charge." Paris 13, 2010. http://www.theses.fr/2010PA132015.
Повний текст джерелаThe reel-lay installation process of offshore pipelines requires their transport in the form of reels. The cyclic reeling-straightening of these pipes induces an accumulation of ovalisation which decreases their resistance to collapse. This accumulation being a phenomenon of ratcheting, two possibilities were explored to improve its prediction: the law of kinematic hardening and the yield criterion. The capacity to predict the ovalisation was evaluated for several models of kinematic hardening coupled with the von Mises yield criterion. These models largely overpredict the ovalisation of the tubes. The influence of the yield criterion was evaluated by using the non quadratic yield function of Bron and Besson which has a set of « shape parameters ». The implementation of this model in the code Abaqus had highlighted a larger influence of the yield surface on the ovalisation. The use of this criterion improves the prediction of the ovalisation but insufficiently. This is due mainly to the invariant shape of the yield surface. Thus, we have proposed a phenomenological elastoplastic model describing distortion of yield surface based on Bron and Besson criterion: the distortion is modelled by varying the most influential parameter on the ovality according evolution laws depending on the strain path. The identification of the parameters of this model for the X60 and St52 steels shows its great capacity to predict the evolution of the ovality of the tube, as well as the strain (ratcheting) measured during the cyclic reeling test
Звіти організацій з теми "Modélisation de distorsion"
Meloche, Jean-Philippe, Jérôme Dupras, Andrew Gonzales, Justin Leroux, and François Vaillancourt. Étude sur la mise en œuvre d’outils d’écofiscalité au service de la conservation et de l’adaptation aux changements climatiques dans les basses-terres du Saint-Laurent. CIRANO, June 2023. http://dx.doi.org/10.54932/kgdx2810.
Повний текст джерелаMeloche, Jean-Philippe, Cédric Bourbonnais, Arnaud Dragicevic, Tejasvi Hora, Noémie Lacroix, Julie Lebert, Justin Leroux, et al. Étude sur la mise en œuvre d’outils d’écofiscalité au service de la conservation et de l’adaptation aux changements climatiques dans les basses-terres du Saint-Laurent. CIRANO, June 2023. http://dx.doi.org/10.54932/momv7435.
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