Tesis sobre el tema "Modélisation et calage paramétrique"
Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros
Consulte los 50 mejores tesis para su investigación sobre el tema "Modélisation et calage paramétrique".
Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.
También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.
Explore tesis sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.
Brakna, Mohammed. "Sensor and actuator optimal location for dynamic controller design. Application to active vibration reduction in a galvanizing process". Electronic Thesis or Diss., Université de Lorraine, 2023. https://docnum.univ-lorraine.fr/ulprive/DDOC_T_2023_0152_BRAKNA.pdf.
Texto completoThe aims of the present PhD thesis are to determine a model that is both sufficiently accurate and numerically exploitable to propose optimal placement of sensors and actuators for active vibration control in a galvanizing line. A continuous hot-dip galvanizing process consists in covering a metal (here: a steel band) by a protective layer of zinc which avoids the corrosion due to the air. The thickness of this layer must be constant to guarantee the mechanical properties and surface condition of the product. In a galvanizing line, the moving steel strip is heated and then immersed in a liquid zinc bath before being wiped out by nozzles projecting air. The air flow, as well as the rotation of the driving rolls, among other things, creates vibrations affecting the wiping process and thus the regularity of the zinc deposit. Active control is therefore necessary, for example by means of electromagnets placed on either side of the moving steel strip. In a first step, a behavioral model of the steel strip taking into account the presence and propagation of vibrations was obtained by spatial discretization of a partial differential equation. This state space model was validated in simulation and experimentally on a pilot galvanizing line of ArcelorMittal Research in Maizières-lès-Metz. Once this model is established, the objective of the study is to find the optimal placement of sensors, to measure the vibrations of the strip as efficiently as possible, but also of actuators to minimize the amplitude of these vibrations by an appropriate control law. These problems of optimal placement are at the heart of the issues of active vibration control and are found in many fields of application. An optimal placement method based on Gramian maximization has been proposed in order to reduce the impact of disturbances on the system. Different control strategies have been considered such as (i) observed state feedback based on Kalman filter and LQ regulator; and (ii) extended observed state feedback to improve the results by also taking into account the disturbance estimation provided by a PI (proportional-integral) observer. Simulation and experimental results illustrate the thesis contributions
Gardet, Caroline. "Modélisation multi-échelles de réservoir et calage d'historique de production". Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066645/document.
Texto completoIn this manuscript, we propose two multiscale algorithms for the simulation of geological reservoir models.The first algorithm is based on two-points statistics methods. It is based upon the sequential Gaussian simulation with a secondary variable. In our multiscale approach, the scale of the secondary variable is considered as a second scale of coarser resolution. It represents the trend or the average of the primary variable. In the context of history-matching, it can be shown that adjusting the properties of the geological model at the coarse scale is more effective than doing the same at the fine scale provided a suitable parameterization technique is used. Our method holds for both continuous and discrete variables. The second algorithm is rooted in texture synthesis techniques developed in computer graphics and modified to cope with reservoir simulation. This is a multipoint simulation algorithm. As such, it requires the use of a training image. It permits to simulates complex geological objects like channels or networks of fractures. However, as all multipoint algorithms, it requires significant computation times. We show how the introduction of an intermediate scale reduces the computation time and improves the reproduction of large structures. We also test two techniques to further reduce the computation time: the partial scan of the training image and the preliminary organization of the information extracted from this image
Gardet, Caroline. "Modélisation multi-échelles de réservoir et calage d'historique de production". Electronic Thesis or Diss., Paris 6, 2014. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2014PA066645.pdf.
Texto completoIn this manuscript, we propose two multiscale algorithms for the simulation of geological reservoir models.The first algorithm is based on two-points statistics methods. It is based upon the sequential Gaussian simulation with a secondary variable. In our multiscale approach, the scale of the secondary variable is considered as a second scale of coarser resolution. It represents the trend or the average of the primary variable. In the context of history-matching, it can be shown that adjusting the properties of the geological model at the coarse scale is more effective than doing the same at the fine scale provided a suitable parameterization technique is used. Our method holds for both continuous and discrete variables. The second algorithm is rooted in texture synthesis techniques developed in computer graphics and modified to cope with reservoir simulation. This is a multipoint simulation algorithm. As such, it requires the use of a training image. It permits to simulates complex geological objects like channels or networks of fractures. However, as all multipoint algorithms, it requires significant computation times. We show how the introduction of an intermediate scale reduces the computation time and improves the reproduction of large structures. We also test two techniques to further reduce the computation time: the partial scan of the training image and the preliminary organization of the information extracted from this image
Boutin, Samuel. "Amplificateur paramétrique Josephson : limite quantique, modélisation et caractérisation". Mémoire, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/6984.
Texto completoM'Sirdi, Kouider Nacer. "Modélisation paramétrique adaptative et application à l'analyse spectrale". Grenoble INPG, 1988. http://www.theses.fr/1988INPG0088.
Texto completoKomine, Vadim. "Etude d'un oscillateur paramétrique à quartz : conception, modélisation et réalisation". Besançon, 2003. http://www.theses.fr/2003BESA2006.
Texto completoThe phenomenon of parametric resonance has been theoretically studied just from the beginning of the twentieth century. Its applications in electronics are restricted to low noise HF amplifiers. In this work the application of parametric resonance is extented to the case of RF oscillators. The first chapter is dedicated to a theoretical review and principles of operation of existing parametric devices. It it shown how an electronic parametric oscillator can work when pumping a variable reactance and how this can be applied to quartz crystal oscillators. This type of oscillator is first analysed before being simulated. This theoretical approach is then applied to a 10 MHz quartz crystal resonator inserted in a parametric loop which is modulated with a pump signal whose frequency is twice the loop resonant frequency. Experimental results of this Parametric Quartz Crystal Oscillator (PXO) are discussed in the last chapter. Resulting data are compared with the theoretical ones. The PXO is also caracterized especially in terms of phase noise and frequency stability. Its encouraging features open up possibilities of future developments described in the conclusion
Gillet, Mathieu. "Analyse de systèmes intumescents sous haut flux : modélisation et identification paramétrique". Phd thesis, Université d'Angers, 2009. http://tel.archives-ouvertes.fr/tel-00465240.
Texto completoTaramasco, Ollivier. "Modélisation non paramétrique du comportement des cours boursiers". Grenoble 1, 1993. http://www.theses.fr/1993GRE10038.
Texto completoFischer, Richard. "Modélisation de la dépendance pour des statistiques d'ordre et estimation non-paramétrique". Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1039/document.
Texto completoIn this thesis we consider the modelling of the joint distribution of order statistics, i.e. random vectors with almost surely ordered components. The first part is dedicated to the probabilistic modelling of order statistics of maximal entropy with marginal constraints. Given the marginal constraints, the characterization of the joint distribution can be given by the associated copula. Chapter 2 presents an auxiliary result giving the maximum entropy copula with a fixed diagonal section. We give a necessary and sufficient condition for its existence, and derive an explicit formula for its density and entropy. Chapter 3 provides the solution for the maximum entropy problem for order statistics with marginal constraints by identifying the copula of the maximum entropy distribution. We give explicit formulas for the copula and the joint density. An application for modelling physical parameters is given in Chapter 4.In the second part of the thesis, we consider the problem of nonparametric estimation of maximum entropy densities of order statistics in Kullback-Leibler distance. Chapter 5 presents an aggregation method for probability density and spectral density estimation, based on the convex combination of the logarithms of these functions, and gives non-asymptotic bounds on the aggregation rate. In Chapter 6, we propose an adaptive estimation method based on a log-additive exponential model to estimate maximum entropy densities of order statistics which achieves the known minimax convergence rates. The method is applied to estimating flaw dimensions in Chapter 7
Picard, Marie-Hélène. "Comportement et modélisation p-y des argiles sensibles du Québec : études expérimentale et paramétrique". Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/28732/28732.pdf.
Texto completoMarquot, Aurélien. "Modélisation du traitement de l'azote par boues activées en sites réels : calage et évaluation du modèle ASM1". Pau, 2006. http://www.theses.fr/2006PAUU3016.
Texto completoWastewater treatment by activated sludge was progressively improved in order to remove not only carbonaceous pollutants but also nitrogen and phosphorus. In parallel, mathematical models were developed to represent the complex processes resulting from the biomass activity. This led to the complete description of carbon and nitrogen removal by the Activated Sludge Model n°1 (ASM1, 1987). This model, and all the following ones, are nowadays implemented in simulation software and used as design and operation support tools. Nevertheless the use of simulation in the wastewater treatment field requires high expertise. Furthermore, research must be continued on both models development and protocol for their calibration. In this context the PhD was carried out with the goals of updating Cemagref's recommendations for design and operation of French wastewater treatment plants, and participating to the international research presently carried out by the IWA task group “Guidelines for Use of Activated Sludge Models”. This document first introduces nitrogen removal by activated sludge and the corresponding models. ASM1 was selected for a full-scale survey. This 22-month study aimed at obtaining a calibration of the model parameters. Site characteristics have strongly influenced the development of monitoring methods and calibration/validation procedures adapted for intermittent aeration system. In parallel, laboratory experiments were performed to determine additional model parameters. The results allowed the evaluation of both the model robustness through several calibration campaigns and its capacity to represent real operation of the plant, especially under strong constraints such as nitrification inhibition. This modelling experience with full-scale data was used to simulate “advanced scenarios”. These scenarios aimed at understanding the advantages of simulation compared to conventional design methods. They also allowed deeper assessment of the model mechanisms and limitations. Finally, prospective scenarios compare several design and operation strategies when facing crisis event, such as erratic sludge wastage, rain events, or inhibition of nitrification
LAROUK, PROIETTI AICHA. "Interférométrie ultrasonore et sédimentation de particules : modélisation paramétrique et traitement par déconvolution des signaux reçus". Paris 12, 1998. http://www.theses.fr/1998PA120011.
Texto completoYousuf, Muhammad Amir. "Modélisation paramétrique des petits terminaux et antennes multi-bandes ou ultra large bande". Phd thesis, Télécom ParisTech, 2011. http://pastel.archives-ouvertes.fr/pastel-00634866.
Texto completoMolinaro, Franck. "Caractérisation temps-fréquence et modélisation paramétrique du cliquetis moteur : application à la détection". Toulouse, INPT, 1992. http://www.theses.fr/1992INPT020H.
Texto completoBouchet, Geneviève. "Modélisation paramétrique des amplificateurs industriels hautes fréquences à triode et fonctionnant en classe C". Nancy 1, 1999. http://www.theses.fr/1999NAN10003.
Texto completoSanches, Leonardo. "Résonance sol des hélicoptères : modélisation dynamique, analyse paramétrique de la robustesse et validation expérimentale". Toulouse, ISAE, 2011. http://www.theses.fr/2011ESAE0014.
Texto completoRipert, Pierre-Jean. "Modélisation et identification paramétrique de l'effort de contact pneumatique/sol pour la dynamique véhicule". Nantes, 2006. http://archive.bu.univ-nantes.fr/pollux/show.action?id=7dfc229e-6ee9-466d-bbe3-ca82178b642c.
Texto completoThis work deals with improvement of tire correlation between real tests and simulations. Two ways are used: in one hand parametric identification methodology and in another hand tire model. Parametric identification methodology is said “guaranteed” because it is designed in a criticism way. Thus with all kind of excitations (from test bench or passenger car), structure model and parameters can be obtained robustly. Tire model is based on the robotic formalism and on empirical specification model of tire/ground interaction forces. The obtained model can be used to specify or to predict tyre static force behaviours and first order dynamics. The developed parametric identification methodology and the tire model are combined to characterise few tires with the PSA Peugeot Citroën test bench. Pertinent and observable behaviours are so deduced. The methodology is applied to cornering force and self aligning torque models dedicated to steering handling. At the end the method is applied to real running car measurements to identify cornering force. It proves the validity of the method both for test bench data and for running car data
Clavel, Arnaud. "Modélisation et identification paramétrique de systèmes hystérétiques : application à la suspension des véhicules routiers". Rennes 1, 2002. http://www.theses.fr/2002REN10053.
Texto completoMoudden, Yassir. "Estimation de paramètres physiques de combustion par modélisation du signal d'ionisation et inversion paramétrique". Paris 11, 2003. http://www.theses.fr/2003PA112004.
Texto completoThe work described in this thesis investigates the possibility of constructing an indirect measurement algorithm of relevant combustion parameters based on ionization signal processing. Indeed, automobile manufacturers are in need of low cost combustion diagnoses to enhance engine control. Because of the extreme complexity of the physical phenomena in which the ionization signal originates, the traditional model-based approach appeared unrealistic and did not bring about conclusive results. We hence turned to performing a blind statistical analysis of experimental data acquired on a test engine. The analysis of high dimensional data being notoriously awkward, it is necessary to first reduce the apparent dimension of the signal data, keeping in mind the necessity of preserving the information useful in terms of our estimation problem. The usual techniques such as Principal Component Analysis, Projection Pursuit, etc. Are used to form and detect relevant variables. Further, a procedure for high dimensional data analysis derived as an extension of Exploratory Projection Pursuit, is suggested and shown to be a profitable tool. With this method, we seek interesting projections of high dimensional data by optimizing probabilistic measures of dependence such as Mutual Information, Hellinger divergence, etc. Finally, results are presented that demonstrate the quality and the stability of the low complexity in-cylinder peak pressure position estimators we derived, for a wide range of engine states
Nico, Fabiola. "Modélisation couplée tridimensionnelle des bassins de lagunage : méthode numérique, calage, validation : application à l'étude des performances et des processus de stratification et de mélange". Montpellier 2, 2007. http://www.theses.fr/2007MON20146.
Texto completoDoucet-Généreux, Pierre-Louis. "Simulation des débits d'étiage dans un contexte de changements climatiques : incertitude liée au choix du modèle et au critère de calage". Mémoire, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/8057.
Texto completoBaudin, Olivier. "Schéma de compression adaptative d’image : Modélisation paramétrique et classification, quantification et codage, évaluation. Application en imagerie médicale". Lyon, INSA, 1996. http://www.theses.fr/1996ISAL0024.
Texto completoThis work concerns the study and the realization of a medical (static) image compression algorithm. The method integrates a learning phase during which image data bases of given medical modalities are analyzed in order to adjust and adapt the compression scheme to the local caracteristics of the images. The quality of the reconstructed images is evaluated using an ROC protocol
Villemur, Charles. "Modélisation paramétrique et classification automatique de signaux de forme transitoire : application au contrôle non-destructif". Toulouse, INPT, 1988. http://www.theses.fr/1988INPT082H.
Texto completoAgbodan, Dago. "Nomination persistante dans un modèle paramétrique : identification non-ambigue͏̈ et appariement générique d'entités topologiques". Poitiers, 2002. http://www.theses.fr/2002POIT2313.
Texto completoParametric models have a dual structure where an abstract representation (the parametric specification) references an explicit representation (the geometry). The persistent naming problem is to maintain the references between these two representations in order to be able to reevaluate the second starting from the first, in spite of modifications. The problem is to identify an entity in an initial model, then to find it in a reevaluated model. We propose to represent evolutions of the shells and faces of the modeled objects in a graph. Each entity referenced by the specification is characterized in terms of the graph nodes, and by a link to the current geometry. Matching the initial graph and a reevaluated graph throughout a revaluation, and then, searching common elements in these graphs, allows us to interpret the references and thus to maintain the link between the parametric specification and the geometry in the reevaluated object, ensuring a persistent naming
Barry, Ugo. "Comportement du procédé R3F en nitrification : suivi, modélisation dynamique et limites du procédé". Phd thesis, AgroParisTech, 2013. http://pastel.archives-ouvertes.fr/pastel-00925421.
Texto completoGriffon, Jérôme. "Modélisation et caractérisation multi-paramétrique ultrasonore pour l'évaluation in vivo de l'hétérogénéité tumorale et son influence sur l'évolution thérapeutique". Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS123.
Texto completoIntratumor heterogeneity influencing therapy efficiency, the goal of this thesis is, by the combination of parameters extracted from three ultrasound imaging techniques (contrast enhanced, shear wave elastography and quantitative ultrasound), to characterize tumor evolution and its heterogeneity. Three preclinical experiments carried out in two murine tumor models using three different therapies indicated that ultrasonic parameters provided complementarity information on tumor changes during growth. When evaluated on the entire imaged tumor cross section (global scale), mutiparametric correlations between the parameters from the three imaging modalities differed as a function of the tumor model and the treatment. For a given tumor type and therapy, the multiparametric correlations were modified when considered for more local, homogeneous zones of the tumor in superpixel-based zones (locale scale). This suggests that correlations on the local scale are sensitive to spatial repartition of the different parameters within the tumor that cannot be considered at global scale. Finally, certain contrast enhanced ultrasound parameter were correlated to the future tumor growth evolution. This suggests that integration of contrast enhanced ultrasound based information into mathematical models for tumor growth could help to better model and predict the tumor evolution. The results of this work show the interest of a more localized and multiparametric analysis to better interpret modifications in tumors over time
Smiej, Mohammed Faouzi. "Estimation et modélisation paramétrique de l'onde glottique en vue de la caractérisation objective de la voix pathologique". Nancy 1, 1991. http://docnum.univ-lorraine.fr/public/SCD_T_1991_0020_SMIEJ.pdf.
Texto completoMoreau, Sandrine. "Contribution à la modélisation et à l'estimation paramétrique des machines électriques à courant alternatif : application au diagnostic". Poitiers, 1999. http://www.theses.fr/1999POIT2327.
Texto completoBoitard, Philippe. "Dynamique des véhicules industriels : modélisation non-linéaire pour l'application à la sécurité active et à l'identification paramétrique". Lyon, INSA, 1999. http://www.theses.fr/1999ISAL0081.
Texto completoIn a context of shortening the times of development, it becomes essential for the car manufacturers, to use data-processing simulation like prediction and development tools. In order to study the heavy vehicle handling, a modeling was developed. A mathematical translation of the model was carried out thanks to a program especially developed for this application. This tool is based on symbolic mathematical software called Maple. A data processing environment of simulation was conceived. It uses the modularity of the Matlab / Simulink environment. From an experimental point of view, a parametric identification method is presented. This one is used to parameterise and contribute to the correlation of the models. A comparison between calculation and measurement is carried out on a vehicle of the Renault Midliner type. An example of simulation is presented in the case of a braking in curve and rollover maneuvers
Delrue, Florian. "Modélisation du procédé bioréacteur à membranes immergées : calage et validation du modèle ASM1 sur un site réel : étude des interactions boues activées, conditions opératoires et membrane". Thesis, Bordeaux 1, 2008. http://www.theses.fr/2008BOR13760/document.
Texto completoMembrane bioreactors (MBRs) are becoming increasingly popular for the treatment of municipal wastewater especially when land is limited or when the treatment requirements are high. Nevertheless, the operation of these plants and in particular the fouling of the membrane are still difficult to manage for the operators. Modelling is an efficient tool, which has already been successfully used on conventional activated sludge processes, for the operation and the understanding of the process using Activated Sludge Models (ASM). Biological treatment and membranes filtration capacity (fouling) are two aspects that can be modeled on MBRs. In this work, three full-scale plants were investigated and one of them was chosen for the ASM1 calibration. The usual methodology was adapted to the MBR specificities and to the modeled wastewater treatment plant in particular (wastewater fractionation, oxygen calibration) and a new set of ASM1 parameters was estimated. The influence of the sludge properties and the operating conditions on the membrane filtration capacity is still the subject of numerous studies, generally on pilot-scale MBRs, and modelling is in its early stages. The objective of this work regarding membrane filtration was to characterize the “membrane/sludge” system by studying the interactions between the sludge properties, the operating conditions and the filtration parameters (membrane permeability and fouling rate) and to compare them with the results from the literature. The two studied MBRs showed quite different behaviors and correlations between parameters, validating the statement that the interactions between membranes, sludge and operating conditions are very complex
Pugsley, Gareth. "Modélisation paramétrique non linéaire des machines asynchrones et démarche d'optimisation associée : application au dimensionnement dans les véhicules hybrides". Phd thesis, Grenoble INPG, 2004. http://tel.archives-ouvertes.fr/tel-00408322.
Texto completoPinard, Maxime. "Méthode de modélisation numérique et étude paramétrique de la performance sismique des piliers de ponts typiques du Canada". Mémoire, Université de Sherbrooke, 2014. http://hdl.handle.net/11143/6637.
Texto completoFromantin, Jonathan. "Modélisation hybride temporelle et analyse par contraintes des réseaux de régulation biologiques". Ecole Centrale de Nantes, 2009. http://www.theses.fr/2009ECDN0009.
Texto completoTraore, Mamadou. "Explosions de poussières et de mélanges hybrides : étude paramétrique et relation entre la cinétique de combustion et la violence de l'explosion". Thesis, Vandoeuvre-les-Nancy, INPL, 2007. http://www.theses.fr/2007INPL019N/document.
Texto completoDust explosions risks linked with their occurrence and their gravity are very high. In consequence, we try to understand this phenomenon by studying the influence of various parameters on the dust inflammability (minimum inflammation concentration, temperature and energy) and dust explosivity (maximum overpressure and rate of pressure rise) for both metallic (aluminium) and organic (icing sugar and polyethylene) dusts. Concentration, particle size distribution, water and solvent (hybrid mixtures) contents influences on dust explosion sensibility and severity have been studied. For example, we observed an increase of dust explosivity in the presence of solvent. Thanks to these parametric studies, we initiated a dust explosion modelling by linking combustion kinetic and explosion violence
Maurel-Pantel, Aurelien. "Etude expérimentale et modélisation par éléments finis du procédé de fraisage : Applications à l'identification paramétrique des lois de comportement". Phd thesis, Université de Franche-Comté, 2009. http://tel.archives-ouvertes.fr/tel-00561446.
Texto completoLiu, Weiping. "Contribution au diagnostic de l'isolation statorique des machines électriques par modélisation et identification paramétrique dans le domaine haute-fréquence". Nantes, 2008. http://www.theses.fr/2008NANT2074.
Texto completoThe stator winding insulation faults are one of the major failure sources in electrical machines. However, the current methods of diagnosis all are based on two phenomena: either the insulating material polarization, whose dynamics is very slow, or the partial discharges, which have a spectral signature in very high frequency. In fact, there exists a frequency domain not yet exploited for the diagnosis: it corresponds to the propagation of the voltage wave in the insulating system, which can be considered as a multiconductor transmission line. It is the underlying idea of our work. We first review the constitution of winding insulation system. Then, we present an experimental test bench developed to study its step response: a high voltage pulse generator with very fast commutations allows to excite the system with a sufficiently rich spectrum for its identification. In parallel, a simulation model of the insulating system is developed in the Matlab/Simulink environment. It allows to study the diffusion phenomena of the voltage wave and to qualitatively simulate the influence of the end-windings contamination and the ageing of the insulating material. Experimental and simulation signals are exploited to study the potentialities of two structures of diagnosis model. This exploratory work shows the possibility to discriminate the evolution of the inner capacitance of the windings, which is mainly dependent of the dielectric ageing, and the capacitance between the windings and the magnetic circuit, which is also affected by the pollution of the end-windings. So, these primary results valid the proposed approach
Maurel-Pantel, Aurélien. "Etude expérimentale et modélisation par éléments finis du procédé de fraisage : applications à l'identification paramétrique des lois de comportement". Besançon, 2009. http://www.theses.fr/2009BESA2017.
Texto completoMilling is among machining processes one of the most frequently used, but although milling processes operations are very used in mechanical engineering industries and as a lot of experimental results are avail-able, some essential physical phenomena present difficulties of understanding. In-deed milling is a very complex process with physical interactions between shearing, compression, ploughing, friction, very high strain rate, thermal effects and failure. Actually the machining industry needs to use new methodologies to optimise milling operations, investigations relate three main activities : in this context, a three dimensional finite element model of milling process, using an explicit commercial code, was developed in the proposed works. The workpiece material behaviour is in a first approach described using a Johnson-Cook constitutive law. In the same time, milling tests have been conducted to furnish cutting forces data in a shoulder milling configuration. In this way, a milling machine has been instrumented with a dynamometer linked to a specific real-time data acquisition system in order to measure milling cutting forces curves. Then, a confrontation has been led between the numerical and the experimental results. These experimental and numerical methods are here applied for a 304L stainless steel. Finally a behaviour model parameters identification procedure has been set up with the correlation of numerical and experimental results. Ail results are furnished by an analytical of finite element models of milling and by the experimental measure directly in milling process. The final consist to obtain predictive models on a wide working zone
Amai, Nikabou. "Contribution à la modélisation paramétrique en transmission mécanique : le modèle ARMAX entre l'erreur de transmission et le bruit d'engrènement". Lyon, INSA, 1998. http://www.theses.fr/1998ISAL0118.
Texto completoDesign of gear power transmissions moves towards reduction of vibration and noise pollution after have improving geometry. Since several years, transmission error is recognised as the main measurable excitation of the gearing mechanisms. In this work, we have chosen to introduce an experimental model of transfer between transmission error and acoustic effects on a one-stage gearing system, taking into account real operating conditions. From the available structures of parametric model, only the ARMAX model seems to be a reliable description of transfer function with a low number of parameters. These models nevertheless require signal modifications and an analysis by frequency bands. The presented study is essentially concerned with mesh frequency. The physical interpretation of the models runs though establishment of the differential equation which governs the concerned system. This first approach shows that the excitation is described by a combination of transmission error and its first time derivative. A parametric study, with the help of experimental design, leads to the conclusion that load is not the most influent factor and that geometric factors are associated with operating factors. These factors change the mechanism of gear noise generation. Taking these modifications into account on differential equation coefficients permits to propose a complex hybrid model of the transfer between transmission error and gearing noise. This modelisation method can be used on entire gearing power transmissions like automotive gearbox
Fromentin, Jonathan. "Modélisation hybride temporelle et analyse par contraintes des réseaux de régulation biologiques". Phd thesis, Ecole centrale de nantes - ECN, 2009. http://tel.archives-ouvertes.fr/tel-00443781.
Texto completoCattaneo, David. "Modélisation graphique et simulation en traitement d'information quantique". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAM076/document.
Texto completoGraph States formalism consist in using graphs to model quantum states. This formalism allows us to use notion and tools of graph theory (e.g. flow, domination, probabilistic methods) in quantum information processing. Last years, this combinatorial modelisation had lead to many decisiv breakthroughs, in particular (i) in the comprehension of the quantum entranglement properties (ii) in very promising in term of physical implementation quantum calculus model, and (iii) in the analysis and construction of quantum cryptography protocols. The goal of this thesis is to study the graphic properties emerging of those quantum information processing problematics, especially for quantum simulation. In particular, the properties of causality and locality in graph states, by extanding for exemple the existing notion of causality flows to a notion integring the locality constraints, would allow new perspectives for the quantum system simulation using graphs states. Formal connections with noisy quantum cellular automata would emerge from this study
Hobon, Mathieu. "Modélisation et optimisation de la marche d'un robot bipède avec genoux anthropomorphiques". Phd thesis, Paris, ENSAM, 2012. http://pastel.archives-ouvertes.fr/pastel-00832164.
Texto completoBoulanger, Jérôme. "Estimation non-paramétrique et contributions à l'analyse de séquences d'images : modélisation, simulation et estimation du trafic intra-cellulaire dans les séquences de vidéo-microscopie". Rennes 1, 2007. ftp://ftp.irisa.fr/techreports/theses/2007/boulanger.pdf.
Texto completoIn this document, the problem of the restauration of videomicroscopy image sequences is first analyzed using an adaptive non-parametric estimation approach. A sequence of growing neighborhoods is thus design to control the bias-variance tradeoff of our estimator based on a weighted average of the data in a adapted neighborhood at the considered location. This procedure allows us to minimize the local quadratic risk in order to select the optimal extent of the neighborhood. The estimator selects points in this neighborhood using a similarity measure based on a distance computed between patches provides a way to better preserve the structures of the image. The analysis and the modelisation of the intracellular membrane trafficking is latter discussed distinguishing the slowy moving component and fast moving component of the sequence. A model based on the analogy between intracellular traffic and communication networks is used to capture the dynamic of the transport intermediates
Kodjo, Vidjannagni. "Évaluation et modélisation des dispositifs de retenue pour motards". Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1141/document.
Texto completoIn France, in 2015,motorcyclists represent 43% of seriously injured accident victims in road traffic. At the same time, even though motorcyclists impact crashes against the road restraint systems represent on average 10% of accidents in road traffic, motorcyclists present a risk of death from30 to 80 times upper than the risk of death for users of vehicles involved in the same type of accidents. To enhance the safety of motorcyclists, Vehicle Restraints Systems (VRS) arefitted to the lower part of restraint systems for motorcyclists. Motorcyclist’s Restraint Systems (MRS) are designed to absorb shocks gradually and to preventmotorcyclists to pass through the lower part of VRS, to hit a post and be severely injured. Before being installed on the roadsides, MRS have to be crash-tested according to standards in order to evaluate their safety and ensure motorcyclists safety. However, there are only normative procedures to testMRS, the LIER procedurein the French context and the procedure EN1317-8 in the European context. To assess both normative procedures and propose new provisions which can be used as normative procedure more advanced on the protocol of MRS performances evaluation tests, numerical simulations were performed. A numerical model of MRS was developed and correlated on one real impact test on other device of same type. Once correlated, the model was used to conduct a parametric study on the test conditions and thematerialsmechanical properties of the MRS. Finally, a new demarche of MRS performances evaluation was developed
Jabloun, Meryem. "Modélisation de signaux fortement non stationnaires à phase et à amplitude locales polynomiales". Phd thesis, Grenoble INPG, 2007. http://www.theses.fr/2007INPG0077.
Texto completoThis work concentrates on the estimation and reconstruction of highly non-stationary signals having both non-linear amplitude and frequency modulations. We propose a new method for estimating the above mentioned signals with high additive noises. Most of the previously published work in this domain is plagued by shortcomings and at times even fails to address the problem of estimation. We have shown that by using a local approach, which provides flexibility to fit to the local variations of the instantaneous amplitude and frequency, the estimation results are improved significantly. The novelty of the presented work consists in the use of parametric models well-adapted and defined on short time segments. We have also proposed a new technique for obtaining short time segments from the entire signal. Finally, we propose a merging strategy to reconstruct the entire signal along with its modulations. The proposed estimation approach is great interest as it does not require a higher order model to estimate the entire signal. Initially, we validate the estimation effeciency of the local model considering a short time segment. This local model uses polynomial approximations of both local instantaneous amplitude and frequency, decomposed using a discrete orthonormal base which we derived. We also affirm that this base reduces the coupling of model parameters. Hence, the estimation accuracy is enhanced. Furthermore, we have compared two techniques to estimate the model parameters. The first approach is based upon the maximization of the likelihood function by means of an optimization stochastique technique named Simulated Annealing. The second approach uses the MCMC methods with Metropolis-Hastings algorithm. We demonstrate using simulations and real applications that the proposed approach improves both performance and robustness of signal estimation as compared to the existing Higher Ambiguity function based technique
Jabloun, Meryem. "Modélisation de signaux fortement non stationnaires à phase et à amplitude locales polynomiales". Phd thesis, Grenoble INPG, 2007. http://tel.archives-ouvertes.fr/tel-00176079.
Texto completoet de reconstruction de signaux fortement non-stationnaires, modulés non-linéairement à la fois
en amplitude et en fréquence. L'estimation de tels signaux dans un contexte trés bruité est un problème
délicat et les méthodes existantes de la littérature présentent plusieurs inconvénients dans ce cas.
Nous avons montré comment une approche locale permet une meilleure adaptabilité du modèle à la
nature des variations locales des amplitudes et des fréquences instantanées. Les résultats de l'estimation
sont par conséquent améliorés. L'originalité de la méthode proposée tient à l'application de modèles paramétriques bien adaptés sur des segments temporels de courtes durées extraits du signal étudié. Nous
avons proposé une stratégie de segmentation puis une stratégie de fusion des segments estimés permettant
la reconstruction du signal dans la totalité de sa durée. L'approche proposée permet de s'affranchir d'un
modèle global du signal requérant un ordre d'approximation élevé.
La validation de l'efficacité de l'estimation a été effectuée au préalable sur un segment temporel court.
Le modèle considéré localement consiste en une approximation polynomiale de la fréquence et de l'amplitude
exprimée dans une base polynomiale discrète et orthonormale que nous avons calculée. Cette base
permet de réduire le couplage entre les paramètres du modèle. Nous proposons et comparons deux techniques
différentes pour estimer ces derniers. La première est fondée sur la maximisation de la fonction
de vraisemblance en utilisant la technique d'optimisation stochastique le recuit simulé. Tandis que la
deuxième se base sur une approche Bayésienne employant les méthodes MCMC simulées par l'algorithme
de Metroplois-Hastings.
Nous montrons, sur des simulations et également sur des signaux réels, que l'approche proposée fournit
de bons résultats d'estimation par comparaison à celles de la HAF.
Fernandez, Charles. "Modélisation et validation expérimentale des complexes insonorisants pour la prévision vibroacoustique numérique basse et moyenne fréquences des automobiles". Phd thesis, Université Paris-Est, 2008. http://tel.archives-ouvertes.fr/tel-00470535.
Texto completoMoretti, Paul. "Performances, modélisation et limites d'un procédé à lit fluidisé associant culture libre et fixée (IFAS) pour le traitement du carbone et de l'azote des eaux résiduaires". Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10214/document.
Texto completoMotivated by the increasingly demanding discharge consents and by the need to improve overall treatment capacity, water authorities are uninterruptedly examining better performing and more compact wastewater treatment technologies. Thanks to its compactness and to its capacity to treat both organic matter and nitrogen at an affordable cost, the IFAS process represents an attractive addition to improve retrofitting-activated sludge plants performance. The main objective of this thesis is to optimize IFAS process with regards to key operation parameters such as dimensioning, F/M ratio by combining experimental and mathematical modelling approaches. A 3 m3 pilot IFAS fed with raw wastewater was operated at the experimental hall of La Feyssine wastewater treatment plant, Villeurbanne, for a period of 2 years. The IFAS process was separated in 3 tanks to treat organic matter and total nitrogen separately (anoxic/aerobic, suspended/aerobic IFAS). The experimental study was divided in 7 periods with different steady state operation conditions each. The feasibility of nitrification at steady F/M ratios (between 0,1S to 0,30 kgBODS/kgMLVSS/d), at constant temperatures (between 10 - 22°C) and at different oxygen supply rates was investigated. TSS in mixed liquor were maintained at 2,3 gMLTSS/L and oxygen concentration between 2 to 6 mgO2/L. Biofilm mass and combined nitrification capacity of biofilm and mixed liquor (NPRmax) were measured on a weekly basis. The removal performance was up to 90% for nitrogen and carbon treatment with a maximal F/M ratio of 0,30 kgBODS/kgMLVSS/d between 16°C to 24 °C. The biofilm was able to nitrify 0,90 gN/m2/d (NPRmax) depending on the oxygen concentration in the mixed liquor (diffusional limitation). Under the operating conditions tested in this study, biofilm was responsible for 40 to 70% of NOx-N production in IFAS reactor during nitrification. Decreasing the MLSRT to less than 4 days limits the growth of autotrophic bacteria in the mixed liquor but does not halt it completely
Hostache, Renaud. "Analyse d'images satellitaires d'inondations pour la caractérisation tridimensionnelle de l'aléa et l'aide à la modélisation hydraulique". Phd thesis, ENGREF (AgroParisTech), 2006. http://pastel.archives-ouvertes.fr/pastel-00002016.
Texto completoCoron, Laurent. "Les modèles hydrologiques conceptuelssont-ils robustes face à un climat en évolution ? Diagnostic sur un échantillon de bassins versants français et australiens". Phd thesis, AgroParisTech, 2013. http://pastel.archives-ouvertes.fr/pastel-00879090.
Texto completoDumont, Thierry. "Contributions à la localisation intra-muros. De la modélisation à la calibration théorique et pratique d'estimateurs". Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00795685.
Texto completo