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Статті в журналах з теми "Méthode du domaine fréquentiel"
Andrieu, Nadine, Eduardo Chia, and Eric Vall. "Recherche et innovations dans les exploitations de polyculture-élevage d’Afrique de l’Ouest Quelles méthodes pour évaluer les produits de la recherche ?" Revue d’élevage et de médecine vétérinaire des pays tropicaux 64, no. 1-4 (January 1, 2011): 7. http://dx.doi.org/10.19182/remvt.10116.
Повний текст джерелаNakbi, Khédija. "La rédactologie : domaine, méthode et compétences." ASp, no. 37-38 (December 30, 2002): 15–26. http://dx.doi.org/10.4000/asp.1428.
Повний текст джерелаTalbot, Robert W. "Méthode d’évaluation pour l’amélioration desperformances dans l’enseignement postsecondaire." Articles 18, no. 2 (November 2, 2009): 217–35. http://dx.doi.org/10.7202/900731ar.
Повний текст джерелаSerratrice, Jean-François. "Une méthode d'interprétation des essais effectués sur site sur des boulons à ancrage réparti sollicités en traction." Revue Française de Géotechnique, no. 171 (2022): 4. http://dx.doi.org/10.1051/geotech/2022005.
Повний текст джерелаGuérin, Hubert. "Régime alimentaire de ruminants domestiques (bovins, ovins, caprins) exploitant des parcours naturels sahéliens et soudano-sahéliens. 1. Rappels bibliographiques sur les objectifs et les méthodes d’étude de la composition botanique des régimes ingérés au pâturage." Revue d’élevage et de médecine vétérinaire des pays tropicaux 41, no. 4 (April 1, 1988): 419–26. http://dx.doi.org/10.19182/remvt.8666.
Повний текст джерелаReliquet, Gabriel, Marie Robert, Lionel Gentaz, and Pierre Ferrant. "Simulations de l'interaction entre le catamaran Delft 372 et la houle à l'aide du couplage SWENSE-Level Set." La Houille Blanche, no. 5-6 (December 2019): 59–66. http://dx.doi.org/10.1051/lhb/2019030.
Повний текст джерелаJerbi, T., V. Burdin, C. Roux, and E. Stindel. "Recalage 2D-3D dans le domaine fréquentiel pour l’étude du mouvement en condition quasi-statique : étude pilote sur l’articulation du genou." IRBM 33, no. 1 (February 2012): 18–23. http://dx.doi.org/10.1016/j.irbm.2011.12.001.
Повний текст джерела-PETIT, Jérôme. "Nouvelle méthode de contrôle dimensionnel dans le domaine de la microélectronique." Revue de l'Electricité et de l'Electronique -, no. 08 (2004): 50. http://dx.doi.org/10.3845/ree.2004.082.
Повний текст джерелаBironneau, Laurent, Dominique Philippe Martin, and Gilles Parisse. "Fiabiliser les données d’un système d'information de gestion par la méthode AMDEC : principes et études de cas." Revue Française de Gestion Industrielle 29, no. 1 (March 1, 2010): 87–108. http://dx.doi.org/10.53102/2010.29.01.620.
Повний текст джерелаMarion, Normand. "La méthode juridique en histoire selon Walter Ullmann (1910-1983)." Les Cahiers de droit 38, no. 4 (April 12, 2005): 919–44. http://dx.doi.org/10.7202/043469ar.
Повний текст джерелаДисертації з теми "Méthode du domaine fréquentiel"
Bonnasse-Gahot, Marie. "Simulation de la propagation d'ondes élastiques en domaine fréquentiel par des méthodes Galerkine discontinues." Thesis, Nice, 2015. http://www.theses.fr/2015NICE4125/document.
Повний текст джерелаThe scientific context of this thesis is seismic imaging which aims at recovering the structure of the earth. As the drilling is expensive, the petroleum industry is interested by methods able to reconstruct images of the internal structures of the earth before the drilling. The most used seismic imaging method in petroleum industry is the seismic-reflection technique which uses a wave equation model. Seismic imaging is an inverse problem which requires to solve a large number of forward problems. In this context, we are interested in this thesis in the modeling part, i.e. the resolution of the forward problem, assuming a time-harmonic regime, leading to the so-called Helmholtz equations. The main objective is to propose and develop a new finite element (FE) type solver characterized by a reduced-size discrete operator (as compared to existing such solvers) without hampering the accuracy of the numerical solution. We consider the family of discontinuous Galerkin (DG) methods. However, as classical DG methods are much more expensive than continuous FE methods when considering steady-like problems, because of an increased number of coupled degrees of freedom as a result of the discontinuity of the approximation, we develop a new form of DG method that specifically address this issue: the hybridizable DG (HDG) method. To validate the efficiency of the proposed HDG method, we compare the results that we obtain with those of a classical upwind flux-based DG method in a 2D framework. Then, as petroleum industry is interested in the treatment of real data, we develop the HDG method for the 3D elastic Helmholtz equations
Demailly, David. "Etude du comportement non-linéaire dans le domaine fréquentiel --- Application à la dynamique rotor." Phd thesis, Ecole Centrale de Lyon, 2003. http://tel.archives-ouvertes.fr/tel-00587168.
Повний текст джерелаBloch, M. "Algorithme de réconciliation et méthodes de distribution quantique de clés adaptées au domaine fréquentiel." Phd thesis, Université de Franche-Comté, 2006. http://tel.archives-ouvertes.fr/tel-00373723.
Повний текст джерелаBloch, Matthieu. "Algorithme de réconciliation et méthodes de distribution quantique de clés adaptées au domaine fréquentiel." Phd thesis, Université de Franche-Comté, 2006. http://tel.archives-ouvertes.fr/tel-00203634.
Повний текст джерелаNous avons proposé un système de distribution quantique de clés par photons uniques exploitant un véritable codage en fréquence de l'information. Cette nouvelle méthode de codage permet de s'affranchir de dispositifs interférométriques et offre donc une grande robustesse. Un démonstrateur basé sur des composants optiques intégrés standard a été réalisé et a permis de valider expérimentalement le principe de codage. Nous avons ensuite étudié un système mettant en oeuvre un protocole de cryptographie quantique par « variables continues », codant l'information sur l'amplitude et la phase d'états cohérents. Le dispositif proposé est basé sur un multiplexage fréquentiel du signal porteur d'information et d'un oscillateur local.
Les débits atteints par les systèmes de distribution de clés ne sont pas uniquement limités par des contraintes technologiques, mais aussi par l'efficacité des protocoles de réconciliation utilisés. Nous avons proposé un algorithme de réconciliation de variables continues efficace, basé sur des codes LDPC et permettant d'envisager de réelles distributions de clés à haut débit avec les protocoles à variables continues.
Ezzine, Montassar. "Observation et commande des systèmes linéaires dans les domaines temporel et fréquentiel." Phd thesis, Université Henri Poincaré - Nancy I, 2011. http://tel.archives-ouvertes.fr/tel-00653058.
Повний текст джерелаHamitou, Okba. "Efficient preconditioning method for the CARP-CG iterative solver for the solution of the frequency-domain visco-elastic wave equation." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAM087/document.
Повний текст джерелаA robust and efficient wave modeling method is the cornerstone of high resolution seismic inversion methods such as the frequency-domain Full Waveform Inversion (Virieux, 2009). After discretization, frequency-domain wave modeling amounts to the solution of large (up to several billion of unknowns for realistic case studies), sparse, indefinite and ill-conditioned linear systems. Furthermore, seismic inversion methods require the solution of this problem for numerous sources (from several thousands up to tens of thousands). In the acoustic approximation, 3D real case studies can be handled efficiently using direct solvers. However because of their tremendous intrinsic memory requirements, they are not yet adapted to the solution of the 3D elastodynamics equations. Iterative solvers provide an alternative to direct solvers. However, they require a preconditioning strategy to ensure convergence for the frequency-domain wave equation. Besides, multiple right-hand sides linear systems are not treated as efficiently as direct solvers do.In this thesis, we are interested in the use of a robust iterative solver adapted to the solution of these systems called CARP-CG (Gordon, 2010). The CARP-CG method has shown robust convergence properties for 2D and 3D elastic problems in highly heterogeneous media compared to standard Krylov methods such as GMRES or Bi-CGSTAB which require the use of a preconditioner to ensure convergence (Li, 2015). Despite the good convergence properties of CARP-CG, the latter still requires a large number of iterations to reach sufficient accuracy. I introduce an efficient preconditioning strategy adapted to the CARP-CG method and the frequency-domain wave problem. This preconditioner is computed as a sparse approximate inverse of a strongly damped wave propagation operator. The computation of the preconditioner is performed in a massively parallel algorithm for distributed memory architectures.The efficiency of the preconditioner is evaluated on several case studies. First, applications are performed on realistic synthetic models in the 2D visco-acoustic approximation (up to $40$ Hz) and the 2D visco-elastic approximation (up to $20$ Hz). These studies show that the CARP-CG method together with the preconditioning strategy is robust and efficient. The number of iterations is significantly reduced (up to a factor $9$) enabling a speedup in the computation time by a factor up to $3.5$. Second, this method is investigated in the 3D elastic approximation on a realistic synthetic case study on the range of frequencies 1.25 to 7.5 Hz. Very encouraging results are obtained with a significant reduction in the number of iterations. A slow increase of the number of iterations with respect to the frequency is noted.This preconditioning strategy adapted to the CARP-CG method implies larger memory requirements. However, this extra memory cost remains one order lower compared to direct solver memory requirement, and should be affordable on standard HPC facilities. The main bottleneck preventing from the possible use of this iterative solver for 3D elastic FWI remains the computation time for the wave equation solves
Villemin, Guilhem. "Caractérisation de sources large bande dans le domaine temporel sans contraintes sur le nombre de capteurs." Phd thesis, Ecole centrale de Marseille, 2013. http://tel.archives-ouvertes.fr/tel-00927102.
Повний текст джерелаRouchon, Amélie. "Analyse et développement d’outils numériques déterministes et stochastiques résolvant les équations du bruit neutronique et applications aux réacteurs thermiques et rapides." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS232/document.
Повний текст джерелаNeutron noise analysis addresses the description of small time-dependent flux fluctuations induced by small global or local perturbations of the macroscopic cross-sections. These fluctuations may occur in nuclear reactors due to density fluctuations of the coolant, to vibrations of fuel elements, control rods, or any other structures in the core. In power reactors, ex-core and in-core detectors can be used to monitor neutron noise with the aim of detecting possible anomalies and taking the necessary measures for continuous safe power production. Thus, neutron noise techniques are more and more used by the nuclear industry for non-invasive monitoring, control and detection of anomalies in nuclear power plants. They are also applied to the measurement of the properties of the coolant, such as speed and void fraction, or of global dynamic properties such as the moderator temperature coefficient of a pressurized water reactor.The general noise equations are obtained by assuming small perturbations around a steady state in the neutron field and by subsequently taking the Fourier transform in the frequency domain. The analysis is performed based on the neutron kinetic equations including the coupling with neutron precursors. For each frequency, the outcome of the Fourier transform analysis is a fixed-source equation for the perturbed neutron field, which can then be solved so as to predict noise measurements at detector locations.The objective of this thesis is to develop techniques for neutron noise analysis and especially to implement a neutron noise solver in the deterministic transport code APOLLO3® developed at CEA.First, we studied and analyzed the traditional neutron noise theory. In order to take into account the action of the regulating system which cancel the time-averaged reactivity added by a perturbation in a core, we found that it is preferable to choose as steady-state operator the time-averaged of the kinetic operator rather than the stationary Boltzmann operator. This new steady-state operator has been developed for the linear and the non-linear full theory.Then, we have implemented a neutron noise solver in diffusion and transport theory for a simple “rod” geometry in multigroup. A non-linear neutron noise solver has been also implemented in diffusion theory for this rod geometry in order to analyze the limits of the linear theory. Moreover, two Monte Carlo methods that solve the transport equations for the neutron noise in the frequency domain have been implemented for this rod geometry: one recently developed in the literature and a new Monte Carlo algorithm that we have developed so as to improve the latter. This new algorithm is supposed to be implemented in the reference Monte Carlo code TRIPOLI-4® developed at CEA. In addition, a new one-dimension vibration model has been developed and tested for the rod geometry in order to simulate a periodic vibration of a mechanical element and to determine the neutron noise generated by this perturbation.Lastly, a neutron noise solver has been implemented in diffusion and transport theory in the deterministic transport code APOLLO3® (IDT lattice solver). In order to test this new solver, we have performed neutron noise simulations in a large pressurized water reactor with heavy baffle in two and three dimensions. Thus, we have concluded our work by analyzing the neutron noise induced by different noise sources, an oscillation or a vibration of one assembly for example, in a case as realistic as ones used in stationary calculations. These simulations have been performed in diffusion and transport theory with two energy groups
Gangnant, Claude. "Contribution à l'étude de la cartographie et la statistique du champ électromagnétique dans une Chambre Réverbérante à Brassage de Modes par une méthode hybride FDFD/développement modal." Limoges, 2008. https://aurore.unilim.fr/theses/nxfile/default/5a61755e-92c2-4b28-870c-9eaedbc7ac44/blobholder:0/2008LIMO4069.pdf.
Повний текст джерелаThis thesis has for objective the writing of a data-processing code allowing the determination of the electromagnetic field in a Reverberation Chamber (RC), using harmonic mode. The principal difficulty in this project is the quantity of useful data-processing resources, especially in the used frequencies range. The developed method is a hybridization using the FDFD/Waveguide mode expansion. The interest of hybridization is to net only part of the interior zone of the enclosure. In the diffraction zone, the finite difference in frequency domain (FDFD) is applied, whereas the electromagnetic field is expanded on a basis of functions in the measurement zone. We define a scalar product utilizing only the longitudinal component of the field, in a cross-section of the cavity. We show that the basic functions then define an orthogonal basis. The originality lies in obtaining the basic functions by numerical calculation (in opposition to analytical), in cases of section of an unspecified form. The validations are carried out by comparison with the analytical ones (without stirrer) and by rebuilding of field cartographies, this for enclosures with rectangular and circular section. The carried out code makes it possible to obtain the weights of the various modes. When the stirrer is present, the validation is statistical and we confirm the laws followed by the various rectangular components and the modules of the field. We note the fundamental role of the losses, defined by the quality factor of the CR for the statistical laws verification
Aliferis, Ioannis. "Imagerie microonde d'objets enterrés : modélisations numériques bidimensionnelles et étude de l'extension tridimensionnelle." Phd thesis, Université de Nice Sophia-Antipolis, 2002. http://tel.archives-ouvertes.fr/tel-00165785.
Повний текст джерелаКниги з теми "Méthode du domaine fréquentiel"
Panopoulos, Georgios. Une méthode de délimitation du domaine d'application du droit privé communautaire: Étude de droit international privé. Bruxelles: Bruylant ; Athènes : Sakkoulas, 2009.
Знайти повний текст джерелаBrügemann, Hans. Méthode de diagnostic et de la thérapie dans le domaine de la bioénergie ultra-fine: Une documentation théorique et pratique. Liège: Marc Pietteur, 1987.
Знайти повний текст джерелаTaane, E. L'Explication de texte: Méthode et pratique : (domaine anglais). Hachette, 1997.
Знайти повний текст джерелаMEURANT and G. Meurant. Computer Solution of Large Linear Systems. North Holland, 1999.
Знайти повний текст джерелаЧастини книг з теми "Méthode du domaine fréquentiel"
ENJOLRAS, Manon, Daniel GALVEZ, and Mauricio CAMARGO. "Les premières phases de conception de produit : une application de AHP." In La décision en innovation, 59–95. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9089.ch2.
Повний текст джерелаLONGUET, Claire, and Jean GUILMENT. "La spectroscopie proche infrarouge." In Spectroscopies vibrationnelles, 85–108. Editions des archives contemporaines, 2020. http://dx.doi.org/10.17184/eac.4198.
Повний текст джерелаENJOLRAS, Manon, Daniel GALVEZ, and Mauricio CAMARGO. "La construction d’un portefeuille de projets cohérent : une application de MAUT." In La décision en innovation, 131–59. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9089.ch4.
Повний текст джерелаCupers, Jean-Louis. "Chapitre 2. Ébauche d’une méthode : les grandes lignes du domaine musico-littéraire." In Euterpe et Harpocrate ou le défi littéraire de la musique, 33–38. Presses de l’Université Saint-Louis, 1988. http://dx.doi.org/10.4000/books.pusl.25885.
Повний текст джерелаCoqueugniot, Hélène. "Paléo-imagerie par rayons X : une méthode d’exploration transdisciplinaire, de l’archéologie à la chirurgie Hélène." In Regards croisés: quand les sciences archéologiques rencontrent l'innovation, 139–56. Editions des archives contemporaines, 2017. http://dx.doi.org/10.17184/eac.3794.
Повний текст джерелаJAVERLIAT, Pascal, Frank PIZON, and Laurent GERBAUD. "La modélisation des conceptions en santé." In Revue Education, Santé, Sociétés, Vol. 7, No. 2, 85–100. Editions des archives contemporaines, 2021. http://dx.doi.org/10.17184/eac.4672.
Повний текст джерелаADENIYA, Jihane kèmi. "Le numérique à l’ère de la Covid-19 : quelles conséquences pour le monde du droit ?" In Les épidémies au prisme des SHS, 183–90. Editions des archives contemporaines, 2022. http://dx.doi.org/10.17184/eac.6004.
Повний текст джерелаТези доповідей конференцій з теми "Méthode du domaine fréquentiel"
ADNAOUI, Khalid, Nourdine TOUNSI, Mohamed CHAGDALI, and Soumia MORDANE. "Méthode de décomposition du domaine pour la modélisation numérique d’un jet par la méthode particule-maillage." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2014. http://dx.doi.org/10.5150/jngcgc.2014.002.
Повний текст джерелаMORDANE, Soumia, Khalid ADNAOUI, Mohamed LOUKILI, Noureddine TOUNSI, and Mohamed CHAGDALI. "La méthode de décomposition du domaine : Application à un problème de soutirage." In Conférence Méditerranéenne Côtière et Maritime - Coastal and Maritime Mediterranean Conference. Editions Paralia, 2015. http://dx.doi.org/10.5150/cmcm.2015.063.
Повний текст джерелаCatros, S. "A quoi servent les Bio-Imprimantes 3D ?" In 66ème Congrès de la SFCO. Les Ulis, France: EDP Sciences, 2020. http://dx.doi.org/10.1051/sfco/20206601012.
Повний текст джерелаЗвіти організацій з теми "Méthode du domaine fréquentiel"
Bhakta, Amita. Mettre en lumière les réalités du secteur de l’EAH grâce à PhotoVoice. The Sanitation Learning Hub, Institute of Development Studies, June 2020. http://dx.doi.org/10.19088/slh.2021.003.
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