Academic literature on the topic 'Systèmes de faible dimension'
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Journal articles on the topic "Systèmes de faible dimension"
Bigsby, Hugh. "Le modèle spatial de rendement est-il une solution plus pertinente pour l¿exploitation des forêts tropicales ?" BOIS & FORETS DES TROPIQUES 314, no. 314 (December 1, 2012): 57. http://dx.doi.org/10.19182/bft2012.314.a20491.
Full textBONNEAU, M., J. Y. DOURMAD, B. LEBRET, M. C. MEUNIER-SALAÜN, S. ESPAGNOL, Y. SALAÜN, P. LETERME, and H. VAN DER WERF. "Evaluation globale des systèmes de production porcine et leur optimisation au niveau de l’exploitation." INRAE Productions Animales 21, no. 4 (September 27, 2008): 367–86. http://dx.doi.org/10.20870/productions-animales.2008.21.4.3413.
Full textRhaiem, H. Ben, D. Tessier, and Ch H. Pons. "Comportement hydrique et évolution structurale et texturale des montmorillonites au tours d'un cycle de dessiccation-humectation: partie I. Cas des montmorillonites calciques." Clay Minerals 21, no. 1 (March 1986): 9–29. http://dx.doi.org/10.1180/claymin.1986.021.1.02.
Full textLecrubier, Y. "Schizophrénie : La prescription des neuroleptiques antiproductifs et antidéficitaires en France." Psychiatry and Psychobiology 1, no. 2 (1986): 139–49. http://dx.doi.org/10.1017/s0767399x00003229.
Full textBENOIT, M., and G. LAIGNEL. "Analyse sur le long terme de systèmes d’élevage ovins allaitants en France.Quelles trajectoires et quels facteurs de réussite économique ?" INRAE Productions Animales 24, no. 3 (July 7, 2011): 211–20. http://dx.doi.org/10.20870/productions-animales.2011.24.3.3256.
Full textSraïri, Mohamed Taher. "Repenser le modèle de développement agricole du Maroc pour l’ère post Covid-19." Cahiers Agricultures 30 (2021): 17. http://dx.doi.org/10.1051/cagri/2021003.
Full textCOLSON, F., and V. CHATELLIER. "Les exploitations bovines selon leur niveau de chargement : diagnostic et perspectives face à la réforme de la PAC." INRAE Productions Animales 7, no. 5 (November 27, 1994): 327–42. http://dx.doi.org/10.20870/productions-animales.1994.7.5.4178.
Full textPelletier, Jean-François, Denis Pouliot-Morneau, Janie Houle, Julie Bordeleau, Sébastien Laroche, and Michael Rowe. "Évaluation d’une intervention de promotion de la citoyenneté : le Projet citoyen de l’Université du rétablissement." Santé mentale au Québec 42, no. 1 (June 14, 2017): 205–22. http://dx.doi.org/10.7202/1040251ar.
Full textGuillotin-Plantard, Nadine. "Sur la convergence faible de systèmes dynamiques échantillonnés." Comptes Rendus de l'Académie des Sciences - Series I - Mathematics 333, no. 6 (September 2001): 583–88. http://dx.doi.org/10.1016/s0764-4442(01)02102-4.
Full textGuillotin-Plantard, Nadine. "Sur la convergence faible des systèmes dynamiques échantillonnés." Annales de l’institut Fourier 54, no. 1 (2004): 211–33. http://dx.doi.org/10.5802/aif.2016.
Full textDissertations / Theses on the topic "Systèmes de faible dimension"
Ligarius, Philippe. "Observateurs de systèmes bilinéaires à paramètres répartis : application à un échangeur thermique." Rouen, 1995. http://www.theses.fr/1995ROUE5041.
Full textVaccarelli, Ornella. "Exotic phenomena in the new frustrated spin ladder Li2Cu2O(SO4)2." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS117.
Full textThe study of frustrated spin-1/2 ladder systems is a fundamental task in condensed matter physics, as they fulfill all the requirements favouring the emergence of new and exotic phenomena. However, despite decades of theoretical work devoted to the study of these spin ladders, real material realizations of such systems still remain limited. In this thesis, we investigate the magnetic properties of a new compound Li2Cu2O(SO4)2. This system appears as a very rare realization of a S=1/2 frustrated two-leg spin ladder in its high-temperature tetragonal structure, where geometrical frustration arises from competing interactions along the legs. Moreover, temperature dependent neutron and X-ray diffraction reveal the presence of a structural phase transition occurring at around 125 K. Combining the experimental and theoretical approaches, we demonstrate that this weak and progressive distortion, while maintaining the global geometry of a ladder, induces the formation of a staggered dimer structure through a large magnetoelastic coupling, removing most of the magnetic frustration. Furthermore, we present the first detailed investigation of the low-temperature magnetic excitations of Li2Cu2O(SO4)2 combining magnetic susceptibility, infrared spectroscopy and inelastic neutron scattering measurements. Experimental observations are qualitatively explained by exact diagonalization and higher-order perturbation calculations carried out on the basis of the dimerized geometry derived from first principle calculations
Launay, Pascaline. "Le paramétrage : une dimension de l’utilisation d’un dispositif permettant au sujet d’agir sur ses possibilités de faire : le cas du paramétrage de l’aide à la navigation automobile." Paris 8, 2007. http://www.theses.fr/2007PA083775.
Full textCombernoux, Alice. "Détection et filtrage rang faible pour le traitement d'antenne utilisant la théorie des matrices aléatoires en grandes dimensions." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLC016/document.
Full textNowadays, more and more applications deal with increasing dimensions. Thus, it seems relevant to exploit the appropriated tools as the random matrix theory in the large dimensional regime. More particularly, in the specific array processing applications as the STAP and MIMO-STAP radar applications, we were interested in the treatment of a signal of interest corrupted by an additive noise composed of a low rang noise and a white Gaussian. Therefore, the aim of this thesis is to study the low rank filtering and detection (function of projectors) in the large dimensional regime for array processing with random matrix theory tools.This thesis has three main contributions in the context of asymptotic analysis of projector functionals. Thus, the large dimensional regime first allows to determine an approximation/prediction of theoretical non asymptotic performance, much more precise than the literature in the classical asymptotic regime (when the number of estimation data tends to infinity at a fixed dimension). Secondly, two new low rank adaptive filters and detectors have been proposed and it has been shown that they have better performance as a function of the system parameters, in terms of SINR loss, false alarm probability and detection probability. Finally, the results have been validated on a jamming application and have been secondly applied to the STAP and sparse MIMO-STAP processings. Hence, the study highlighted a noticeable difference with the jamming application, related to the covariance matrix models concerned by this thesis
Rivas, Mendoza Angel E. "Ondas de densidad de espin en el compuesto casi-2D CuFeTe2 : evidencia directa de la coexistencia de los estados normal y condensado." Toulouse 3, 2005. http://www.theses.fr/2005TOU30010.
Full textIn this thesis work we achieved a rigorous study, by means of different experimental techniques, of the magnetic and electric behavior of the layered compound CuFeTe2. Five samples have been analyzed: four have been prepared by standard melt and anneal techniques and one of them by the Bridgman vertical growth technique. A study of the chemical composition by the EDX technique shows that one of the samples is stoichiometric. The results of X-ray diffraction confirm the tetragonal layered structure of the compound. The magnetic measurements results, performed in a Faraday balance (78-350 K, under a magnetic field of 0. 28 T) and in a SQUID magnetometer (2-320 K, under fields of 35 and 70 G), indicate the appearance of an antiferromagnetic order below about 300 K, with a Pauli paramagnetic behavior above this temperature. This behavior is attributed to the formation of a Spin Density Wave (SDW) state in CuFeTe2. Another element in favor of the existence of the SDW is given by the Mössbauer effect measurements: In the temperature range 2-310 K a variety of spectra are observed, going from an incommensurate magnetic structure, to whom is superposed a non magnetic contribution as temperature raises, until the complete disappearance of the first one. To confirm the itinerant character of the observed magnetism, a spectrum recorded under a magnetic field of 6. 5 T shows that iron doesn't hold a magnetic moment. .
Pontes, Duff Pereira Igor. "Approximation des systèmes dynamiques à grande dimension et à dimension infinie." Thesis, Toulouse, ISAE, 2017. http://www.theses.fr/2017ESAE0001/document.
Full textIn the engineering area (e.g. aerospace, automotive, biology, circuits), dynamical systems are the basic framework used for modeling, controlling and analyzing a large variety of systems and phenomena. Due to the increasing use of dedicated computer-based modeling design software, numerical simulation turns to be more and more used to simulate a complex system or phenomenon and shorten both development time and cost. However, the need of an enhanced model accuracy inevitably leads to an increasing number of variables and resources to manage at the price of a high numerical cost. This counterpart is the justification for model reduction. For linear time-invariant systems, several model reduction approaches have been effectively developed since the 60’s. Among these, interpolation-based methods stand out due to their flexibility and low computational cost, making them a predestined candidate in the reduction of truly large-scale systems. Recent advances demonstrate ways to find reduction parameters that locally minimize the H2 norm of the mismatch error. In general, a reduced-order approximation is considered to be a finite dimensional model. This representation is quite general and a wide range of linear dynamical systems can be converted in this form, at least in principle. However, in some cases, it may be more relevant to find reduced-order models having some more complex structures. As an example, some transport phenomena systems have their Hankel singular values which decay very slowly and are not easily approximated by a finite dimensional model. In addition, for some applications, it is valuable to have a structured reduced-order model which reproduces the physical behaviors. That is why, in this thesis, reduced-order models having delay structures have been more specifically considered. This work has focused, on the one hand, in developing new model reduction techniques for reduced order models having delay structures, and, on the other hand, in finding new applications of model approximation. The major contribution of this thesis covers approximation topics and includes several contributions to the area of model reduction. A special attention was given to the H2 optimal model approximation problem for delayed structured models. For this purpose, some new theoretical and methodological results were derived and successfully applied to both academic and industrial benchmarks. In addition, the last part of this manuscript is dedicated to the analysis of time-delayed systems stability using interpolatory methods. Some theoretical statements as well as an heuristic are developed enabling to estimate in a fast and accurate way the stability charts of those systems
Graces, Erwan. "Hiérarchie mémoire reconfigurable faible consommation pour systèmes enfouis." Phd thesis, Université Rennes 1, 2010. http://tel.archives-ouvertes.fr/tel-00554158.
Full textGrâce, Erwan. "Hiérarchie mémoire reconfigurable faible consommation pour systèmes enfouis." Phd thesis, Université Rennes 1, 2010. http://tel.archives-ouvertes.fr/tel-00783898.
Full textD'Andrea, Fabio. "La variabilite atmospherique a basse frequence comme probleme de faible dimension." Paris 6, 1999. http://www.theses.fr/1999PA066012.
Full textToulet, Anne. "Classifications des systèmes intégrables en dimension 2." Montpellier 2, 1996. http://www.theses.fr/1996MON20113.
Full textBooks on the topic "Systèmes de faible dimension"
Vaniscotte, Francine. Les écoles de l'Europe: Systèmes éducatifs et dimension européenne. Toulouse: IUFM Toulouse, 1996.
Find full textOutil d'évaluation des systèmes de contrôle des aliments: Dimension A – Intrants et ressources. FAO et OMS, 2020. http://dx.doi.org/10.4060/ca5336fr.
Full textOutil d'évaluation des systèmes de contrôle des aliments: Dimension B – Fonctions de contrôle. FAO et OMS, 2020. http://dx.doi.org/10.4060/ca5346fr.
Full textOutil d'évaluation des systèmes de contrôle des aliments: Dimension C - Interactions avec les parties prenantes. FAO, 2020. http://dx.doi.org/10.4060/ca5348fr.
Full textOutil d'évaluation des systèmes de contrôle des aliments: Dimension D – Fondement scientifique, base de connaissances et amélioration continue. FAO et OMS, 2020. http://dx.doi.org/10.4060/ca5404fr.
Full textBook chapters on the topic "Systèmes de faible dimension"
Vaillant, Jean. "Systèmes Uniformément Diagonalisables, Dimension Réduite et Symétrie II." In Partial Differential Equations and Mathematical Physics, 195–223. Boston, MA: Birkhäuser Boston, 2003. http://dx.doi.org/10.1007/978-1-4612-0011-6_16.
Full textAudin, Michèle. "Topologie des systèmes de Moser en dimension quatre." In The Floer Memorial Volume, 109–22. Basel: Birkhäuser Basel, 1995. http://dx.doi.org/10.1007/978-3-0348-9217-9_7.
Full text"A. Convergence faible." In Théorie ergodique et systèmes dynamiques, 177–80. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0996-7-017.
Full text"A. Convergence faible." In Théorie ergodique et systèmes dynamiques, 177–80. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0996-7.c017.
Full text"III. Systèmes dynamiques en basse dimension." In Théorie des systèmes dynamiques, 55–84. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-1050-5-004.
Full text"III. Systèmes dynamiques en basse dimension." In Théorie des systèmes dynamiques, 55–84. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-1050-5.c004.
Full text"Algèbres de dimension 0." In Introduction à la résolution des systèmes polynomiaux, 77–104. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71647-1_4.
Full text"CHAPITRE III. SYSTÈMES QUANTIQUES A UNE DIMENSION." In Tome 1, 65–96. De Gruyter, 1995. http://dx.doi.org/10.1515/9783112327005-008.
Full text"Dimension et degré d'une variété algébrique." In Introduction à la résolution des systèmes polynomiaux, 49–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71647-1_3.
Full textMathonnat, Jacky. "54. Systèmes de santé et accès aux soins dans les pays à faible revenu." In Traité d'économie et de gestion de la santé, 494–504. Presses de Sciences Po, 2009. http://dx.doi.org/10.3917/scpo.bras.2009.01.494.
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