Letteratura scientifica selezionata sul tema "Méthode des sauts de cycles"
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Articoli di riviste sul tema "Méthode des sauts de cycles"
BERTRAND, L., J. FACIONE-ROGER, J.-J. CHAPUS e D. LAGAUCHE. "Accidents traumatiques du membre supérieur chez les parachutistes militaires français. Une revue de 266 accidents sur l’École des troupes aéroportées de 2000 à 2007. (Article en langue anglaise)." Médecine et Armées Vol. 41 No. 2, Volume 41, Numéro 2 (1 aprile 2013): 183–89. http://dx.doi.org/10.17184/eac.6669.
Testo completoPopescu, Dragoş-Radu. "Une méthode d'énumération des cycles négatifs d'un graphe signé". Discrete Mathematics 150, n. 1-3 (aprile 1996): 337–45. http://dx.doi.org/10.1016/0012-365x(95)00198-6.
Testo completoBouabellou, A., V. N. Schemelev e I. R. Taguirov. "Détermination de l'épaisseur et de la concentration des couches minces épitaxiales Ga1−xAlxAs/GaAs par la méthode des sauts de la photoémission". Thin Solid Films 145, n. 1 (dicembre 1986): 51–59. http://dx.doi.org/10.1016/0040-6090(86)90250-6.
Testo completoGurycka, Antonina. "La Méthode des Cycles: Propositions des Psychologues pour les Educateurs". European Journal of Psychology of Education 3, S1 (gennaio 1988): 229–30. http://dx.doi.org/10.1007/bf03326368.
Testo completoBonin, Guy, e Josée Legault. "Comparaison de la Méthode des Constantes de Lyapunov et de la Bifurcation de Hopf*". Canadian Mathematical Bulletin 31, n. 2 (1 giugno 1988): 200–209. http://dx.doi.org/10.4153/cmb-1988-031-6.
Testo completoFouet, Monique. "1ère partie : La production manufacturière". Revue de l'OFCE 45, n. 3 (1 giugno 1993): 285–341. http://dx.doi.org/10.3917/reof.p1993.45n1.0285.
Testo completoSoustelle, C., G. Coddens, R. Bellissent e Y. Calvayrac. "Caractérisation des sauts atomiques ("Phasons") dans les quasicristaux parfaits AlFeCu : un exemple de la méthode de variation de contraste par substitution isotopique en diffusion inélastique de neutrons". Revue de Métallurgie 90, n. 9 (settembre 1993): 1119. http://dx.doi.org/10.1051/metal/199390091119.
Testo completoBancé, Augustin Z., P. A. Ouedraogo, Burkhard Bauer, Idrissa Kaboré e I. Sidibé. "Etude de deux méthodes d’application du triflumuron sur les mâles de Glossina palpalis gambiensis au laboratoire : impact sur la reproduction des femelles". Revue d’élevage et de médecine vétérinaire des pays tropicaux 56, n. 3-4 (1 marzo 2003): 149. http://dx.doi.org/10.19182/remvt.9857.
Testo completoBanjarnahor, Fitriyanti, Pengadilen Sembiring e Elvi Syahrin. "AMÉLIORATION DE LA COMPÉTENCE DE L’EXPRESSION ORALE EN UTILISANT LA MÉTHODE SHOW AND TEL CHEZ LES LYCÉENS DE SMA N 12 MEDAN". HEXAGONE Jurnal Pendidikan, Linguistik, Budaya dan Sastra Perancis 7, n. 2 (9 ottobre 2018): 567. http://dx.doi.org/10.24114/hxg.v7i2.10940.
Testo completoPalé, Sié, Farid Traoré, Joost Wellens, Cyrille Bassolo Baki, Aboubakar Sako e Bernard Tychon. "Estimation des surfaces irriguées ripariennes à l’aide de Earth Engine. Une étude de cas dans le sous-bassin versant de la Haute-Comoé, Burkina Faso". Cahiers Agricultures 33 (2024): 1. http://dx.doi.org/10.1051/cagri/2023023.
Testo completoTesi sul tema "Méthode des sauts de cycles"
Cao, Jiangping. "Modélisation numérique des problèmes d'interfaces sable-pieu pour les très grands nombres de cycles : développement d'une méthode de sauts de cycles". Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10133/document.
Testo completoThis thesis deals with a numerical analysis of structure-soil interface under the cyclic loading by finite different method. The principal of this work relates to the development of a constitutive law, including the nonlinear kinematic hardening which allows to simulate the behavior of structure under the cyclic loading. Instead of using a method calculation cycle by cycle, we develop a method called « Cycles Skipped », which gives the possibility to reduce the computation time of the simulation. The thesis is organized as follow: The first chapter discusses about the synthesis bibliography of cyclic loading in geotechnical engineering. Based on the laboratory tests, some experimental observations are presented and analyzed in this chapter. Besides, the principal existed methods are presented to describe the behavior of elementary soil or interface under cyclic loading. The second chapter; from the laboratory and in-situ observations, the different models are presented to describe the behavior of structure under cyclic loading. Particularly, a cyclic constitutive law « Modjoin » in elastoplasticity model (Shahrour, 1997) is proposed and improved to decrease the ratchet phenomenon of cyclic loading for analyzing the behavior of structure under a very large number of cyclic loading (n>103). A deep study of its potential is realized and some numerical applications are presented in this chapter. The third chapter proposes a Modjoin modeling, which involves the validity of this model and the analysis of the behavior of structure under cycles load. Two modelings with thousand cycle loads are carried out to verify that the law is correctly implanted in finite difference code. The fourth chapter concerns about the development of a method « cycles skipped » which allows to estimate the structure behavior under a large number of loading cycles without calculating cycle by cycle. This method based on an extrapolation of plastic deformation which is injected into the model as the nodal forces. The extrapolation of plastic deformation consists of Taylor’s expansion and least squares regression. Finally, some calculations are performed and a comparison of results observed between different methods will be presented
Hendrycks, Baptiste. "Modélisation de l'assemblage roue/essieu ferroviaire et de sa tenue en fatigue sous chargement cyclique". Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILN049.
Testo completoThe objective of this thesis is to propose numerical models allowing a better understanding of the fatigue behavior of the railway wheel-axle assembly.A first model simulates the press fit operation in the assembly of a railway axle and wheel. A particular attention was paid to the friction between the wheel and the axle, which notably made it possible to show a dependence of the friction factor on the contact pressure. Also, the simulation highlights the creation of a geometric singularity at the start of the operation having an influence on the distribution of stresses in the structure.Then, a model simulates the multiaxial cyclic stress on a scale 1 test specimen wheel/axle assembly. A behavior model for the EA1N steel, used for the axles, was developed in order to be used for both monotonic and cyclic problems. This model, with a high loading level, shows a significant deformation of the wheel seat with the contact opening.The skipped cycles method was chosen in order to quickly calculate a stabilized mechanical state. The use of this method initially on a simplified wheel/axle assembly, then on a real case shows good precision of the results despite a dependence on local refinement and the developed material behavior which can constrain the calculation time.Finally, we calculate the fatigue strength of the structure with the application of a fatigue criterion. We also propose a discussion based on loading paths, in particular on the appearance of alternating shear on the wheel seat
Laporte, Francis. "Méthode d'inférence utilisant la vraisemblance empirique basée sur l'entropie pour les modèles de diffusion avec sauts". Master's thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/33909.
Testo completoWith the advent of increasingly sophisticated models for modeling stock market returns, the classical maximum likelihood method for inferring parameters is generally no longer applicable since, for example, the density function has no closed form or very difficult to calculate numerically. In the literature, inference by the method of moments (MM) is therefore generally suggested. In this master’s thesis, a more efficient inference method, the maximum empirical entropy likelihood (MEEL), is proposed for two particular cases of the Lévy process, namely the Merton and Tsay models. First, a review of some models developed in the past is done. The flaws of the geometric Brownian motion are presented to justify the use of more sophisticated models. Then, the two models, Merton and Tsay, and their properties are presented in more detail. Subsequently, there is a comparative analysis between the effectiveness of the MEEL and the MM; an example with real data is also presented. Finally, two approaches to pricing derivatives are presented.
Serafino, Aldo. "Méthode d'optimisation robuste multi-fidélité pour les cycles organiques de Rankine". Thesis, Paris, HESAM, 2020. http://www.theses.fr/2020HESAE055.
Testo completoRobust design optimization (RDO) is an important tool for the design of industrial products underuncertainty. It combines optimization algorithms and uncertainty quantification (UQ) techniques. Quantificationof uncertainties is generally too expensive for complex numerical models of engineering systems. With the aimof developing efficient RDO strategies designed for industrial applications, the coupling of parsimonious UQtechniques with a multi-objective genetic algorithm based on surrogate models (SMOGA) was studied. In thisregard, a promising RDO technique was used, based on the coupling of two nested surrogate models: the firstis used for UQ, while the response surface of the second is used to accelerate optimization; an infill criterion isused to update the surrogate model during optimizer convergence. Several UQ methods using information onthe gradients of the solution with respect to the uncertain variables were implemented and compared in termsof precision and computational cost. We then selected a so-called “low fidelity” UQ method, i.e. inexpensivebut not very accurate, and a “high fidelity” method in order to build a multi-fidelity surrogate model for robustoptimization. This model allows to have an accuracy close to the high fidelity model for a much lower computationcost. The methods under investigation were applied to the RDO of organic Rankine cycles (ORC) and to theshape optimization of an ORC turbine blade grid, with very promising results
Jraifi, Abdelilah. "Analyse numérique de modèles de diffusion-sauts à volatilité stochastique : cas de l'évaluation des options". Thesis, Valenciennes, 2014. http://www.theses.fr/2014VALE0002.
Testo completoIn the modern economic world, the options contracts are used because they allow to hedge against the vagaries and risks refers to fluctuations in the prices of the underlying assets. The determination of the price of these contracts is of great importance for investors.We are interested in problems of options pricing, actually the European and Quanto options on a financial asset. The price of that asset is modeled by a multi-dimentional jump diffusion with stochastic volatility. Otherwise, the first model considers the volatility as a continuous process and the second model considers it as a jump process. Finally in the 3rd model, the underlying asset is without jump and volatility follows a model CEV without jump. This model allow better to take into account some phenomena observed in the markets. We develop numerical methods that determine the values of prices for these options. We first write the model as an integro-differential stochastic equations system "EIDS", of which we study existence and unicity of solutions. Then we relate the resolution of PIDE to the computation of the option value. This link, which is based on the notion of infinitesimal generators, allows us to use different numerical methods. We therefore introduce the variational equation associated with the PIDE, and drawing on the work of Zhang [106], we show that it admits a unique solution in a weights Sobolev space We focus on the numerical approximation of the price of the option, by treating the problem in a bounded domain. We use the finite elements method of type (P1), and the scheme of Euler-Maruyama, for this serve, on the one hand the finite differences method in time, and on the other hand the method of Monte Carlo and the Quasi Monte Carlo method. For this last method we use of Halton sequences to improve the speed of convergence.We present a comparative study of the different numerical results in many different cases in order to investigate the performance and effectiveness of the used methods
Loulidi, Sanae. "Modélisation stochastique en finance, application à la construction d’un modèle à changement de régime avec des sauts". Thesis, Bordeaux 1, 2008. http://www.theses.fr/2008BOR13675/document.
Testo completoAbstract
Nguyen, Laurent. "Calibration de modèles financiers par minimisation d'entropie relative et modèles avec sauts". Phd thesis, Ecole des Ponts ParisTech, 2003. http://tel.archives-ouvertes.fr/tel-00005766.
Testo completoLa calibration de modèles financiers par minimisation de lentropie relative a été proposée récemment dans le cadre de la méthode de Monte Carlo. On a étudié la convergence et la stabilité de cette méthode et on a étendu les résultats à des critères plus généraux que lentropie relative. La prise en compte des contraintes sur le sous-jacent assurant labsence dopportunité darbitrage a été abordée sous langle dun problème de moments.
Dans la seconde partie, on a considéré un modèle simple du phénomène de krach en introduisant en particulier des sauts dans la volatilité du sous-jacent. On a calculé le risque quadratique et effectué un développement approché du smile utile pour la calibration.
Finalement, dans la troisième partie, on utilise lentropie relative pour calibrer lintensité des sauts dun modèle de diffusion avec sauts et volatilité locale. La stabilité de la méthode a été prouvée grâce à des techniques de contrôle optimal ainsi quau théorème des fonctions implicites.
Suparman, Suparman. "Problèmes de choix de modèles par simulation de type Monte Carlo par chaînes de Markov à sauts réversibles". Toulouse 3, 2003. http://www.theses.fr/2003TOU30005.
Testo completoRoche, Sébastien. "Méthodes de poursuite de phase pour signaux GNSS multifréquence en environnement dégradé". Thesis, Toulouse, ISAE, 2013. http://www.theses.fr/2013ESAE0047/document.
Testo completoThis thesis aims at introducing multifrequency phase tracking algorithms operating in low C/N0environment. The objective is to develop new structures whose tracking limits are lower than thatof current algorithms used in mass market receivers. Phase tracking suffers from a lack of robustnessdue to the cycle slip phenomenon. Works have thus been focused on elaborating new phaseunwrapping systems. To do so, two different tracking approaches were studied. First, we have developed new monofrequency tracking loops based on a conventional DPLL. These structures aimat predicting the discriminator output by analyzing, thanks to a polynomial model, the last outputsamples of either the discriminator or the loop filter. Once the discriminator output is predicted,the estimated value is pre-compensated so that the phase dynamics to be tracked is reduced aswell as the cycle slip rate. Then, the unwrapping structure analyzing the loop filter outputs hasbeen extended to multifrequency signals. Using a data fusion step, the new multifrequency structuretakes advantage of the frequency diversity of a GNSS signal (i.e., proportionality of Dopplerfrequencies) to improve the tracking performances. Secondly, studies have been focused on developing a new multifrequency tracking algorithm using variational Bayesian filtering technique.This tracking method, which also uses the GNSS frequency diversity, assumes a Markovian phasedynamics that enforces the smoothness of the phase estimation and unwraps it
Tounsi, Abdelmajid. "Cycles repère : de l'espace scénique à l'espace écranique". Thesis, Université Laval, 2009. http://www.theses.ulaval.ca/2009/26332/26332.pdf.
Testo completoLibri sul tema "Méthode des sauts de cycles"
1957-, Peters John, e Howard Keith, a cura di. The management of a student research project. 3a ed. Aldershot, Hants, England: Gower, 2002.
Cerca il testo completoRavichandran, G. Finite Element Analysis of Weld Thermal Cycles Using ANSYS. Taylor & Francis Group, 2020.
Cerca il testo completoRavichandran, G. Finite Element Analysis of Weld Thermal Cycles Using ANSYS. Taylor & Francis Group, 2020.
Cerca il testo completoRavichandran, G. Finite Element Analysis of Weld Thermal Cycles Using Ansys. Taylor & Francis Group, 2020.
Cerca il testo completoFinite Element Analysis of Weld Thermal Cycles Using ANSYS. Taylor & Francis Group, 2020.
Cerca il testo completoRavichandran, G. Finite Element Analysis of Weld Thermal Cycles Using Ansys. Taylor & Francis Group, 2022.
Cerca il testo completoBenton, Celia. How a Frog Grows. Capstone, 2003.
Cerca il testo completoBenton, Celia. How a Frog Grows: Set B (Phonic Readers). Compass Point Books, 2003.
Cerca il testo completoBenton, Celia. How a Frog Grows. Capstone, 2003.
Cerca il testo completoBenton, Celia. How a Frog Grows. Capstone, 2003.
Cerca il testo completoCapitoli di libri sul tema "Méthode des sauts de cycles"
MOËS, Nicolas. "Méthodes des éléments finis étendus (XFEM) et des level sets épaisses (TLS)". In Modélisation numérique en mécanique fortement non linéaire, 275–307. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9081.ch6.
Testo completoABANADES, Stéphane. "Production de carburants solaires par dissociation thermochimique de l’eau et du CO2". In Le solaire à concentration, 331–58. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9079.ch11.
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