Dissertations / Theses on the topic 'Électromagnétique dans le domaine temporel'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Électromagnétique dans le domaine temporel.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Giraudon, Cyril. "Contribution à la simulation électromagnétique dans le domaine temporel : Approches électromagnétique et informatique." Limoges, 2002. http://www.theses.fr/2002LIMO0019.
Bonilla, Matthieu. "Contribution à l'étude des méthodes d'analyse électromagnétique temporelle des dispositifs micro-ondes et non linéaires." Paris 6, 2002. http://www.theses.fr/2002PA066043.
Auzereau, Lionel. "Prise en compte de circuits complexes non linéaires dans les codes différences finies dans le domaine temporel : Applications en compatibilité électromagnétique et dans le domaine des télécommunications." Limoges, 1997. http://www.theses.fr/1997LIMO0001.
Pernet, Sébastien. "Etude de méthodes d'ordre élevé pour résoudre les équations de Maxwell dans le domaine temporel : Application à la détection et à la compatibilité électromagnétique." Paris 9, 2004. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2004PA090031.
In this thesis, we are interested in the resolution of time-depending Maxwell's equations. To achieve this, we study two higher-order methods: The first one is a spectral finite elements method. A approximation space crafty chosen and a time-depending leapfrog scheme allows to result in a accurate and fast algorithm. Numerical experiments showed the effectiveness of the method. Unfortunately, the use of too shapeless meshes results in the apparition of parasitic waves which damage the solution. The second one is a hexahedral discontinuous Galerkin method with mass-lumping. The use of the same approximation space than as well as the use of a non-dissipative formalism lead to a method which needs a little storage and to a fast algorithm. We stress the disappearance of the parasitic waves and the gain of more storage and CPU time. We improve its speed thanks to a local time-step strategy and a parallelisation of the code
Agha, Mohammadi Farahnaz. "Contribution à la modélisation éléctrique et électromagnétique des circuits électroniques microondes basée sur une approche physique macroscopique dans le domaine temporel." Lille 1, 1998. http://www.theses.fr/1998LIL1A001.
Riboulet, Anne. "Conception et analyse de méthodes numériques performantes pour la propagation d'impulsions électromagnétiques dans le domaine temporel." Bordeaux 1, 1999. http://www.theses.fr/1999BOR10555.
Nezzari, Amar. "Mise en oeuvre de modèles électromagnétiques 2D et 3D utilisant la méthode des différences finies dans le domaine temporel (FDTD) dans l'optique d'études d'éléments de circuits pour l'intégration monolithique millimétrique." Lille 1, 1993. http://www.theses.fr/1993LIL10105.
Dans une troisième et dernière partie, nous décrivons les applications possibles des modèles mis en oeuvre dans l'état actuel de leur développement. Nous y insistons en particulier sur les méthodes adoptées pour résoudre les problèmes de conditions aux limites, conditions de raccordement, conditions aux limites absorbantes et excitation des structures étudiées. Ces modèles permettent actuellement de mettre qualitativement en évidence les phénomènes électromagnétiques dans des guides d'ondes métalliques et des structures de type lignes planaires, en régime d'oscillations entretenues et dans la gamme des longueurs d'ondes millimétriques. Il est d'autre part possible d'extraire différentes grandeurs physiques importantes, telles que l'impédance caractéristique, la longueur d'onde guidée, ou la puissance électromagnétique véhiculée dans la structure. Finalement, nous présentons une comparaison théorie-expérience, consacrée à l'étude d'une transition guide rectangulaire métallique-ligne microruban, à 60 ghz. Cette comparaison est satisfaisante. La validation de nos modèles et les résultats satisfaisants obtenus devraient permettre d'envisager leur application à l'étude de circuits plaques en vue de leur intégration monolithique
Moya, Ludovic. "Méthodes Galerkine discontinues localement implicites en domaine temporel pour la propagation des ondes électromagnétiques dans les tissus biologiques." Phd thesis, Université Nice Sophia Antipolis, 2013. http://tel.archives-ouvertes.fr/tel-00950386.
Visan, Silviu. "Simulation électromagnétique 3D basée sur la méthode des différences finies dans le domaine temporel : application à l'étude de structures planaires utilisées dans les circuits intégrés monolithiques microondes et millimétriques." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0014.
Finco, Cécile. "Étude de l’impact simultané des propriétés électriques, diélectriques et magnétiques du sous-sol sur la mesure géophysique par méthode électromagnétique inductive dans le domaine temporel (TDEM)." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS103.
The geophysical electromagnetic inductive method in the time domain (TDEM) is used in fields such as hydrology or in mining exploration. It allows the establishment of electrical resistivity models of the subsurface. Using this methods with reduced acquisition loops with a width of only a few meters, makes the measurement more sensitive to additional parameters : the dielectric permittivity and the magnetic permeability. The present research work aims to acquire a small-loop TDEM sounding and to extract not only an electical resistivity model but also an estimation of the dielctric permittivity and of the magnetic viscosity. The acquisition of a small-loop TDEM sounding implies a increased sensitivity to the response from the acquisition system itself, in part because of the reduced distance between the transmission and reception loops. Simulations aiming to reproduce this system response have been carried out to be able to take it into account during the data processing step. A specific acquisition geometry is then proposed to ease the multi-parameter interpretation of the TDEM data. The effects from the electric, dielectric and magnetic properties of the ground are overlapping on the measurements in the central configuration. Using different geometry with lower sensivities to dielectric permittivity and magnetic viscosity should make the contribution of each parameter easier to isolate. These methological developments were then tested with field measurement on the test site of Garchy (Nièvre, France)
Etourneau, Pascal. "Modélisation électromagnétique des interconnexions par la méthode des différences finies dans le domaine temporel (F. D. T. D. ). Application à l'étude des techniques de report de circuits M. M. I. C. Dans le domaine des ondes millimétriques." Limoges, 1997. http://www.theses.fr/1997LIMO0053.
Poulin, Cyndie. "Etudes des matériaux, composants et systèmes dans le domaine térahertz par analogie aux méthodes optiques." Thesis, Ecole centrale de Marseille, 2018. http://www.theses.fr/2018ECDM0010/document.
The aim of my thesis is to extend the electromagnetic models already existing at the Institut Fresnel for the optical frequencies towards the terahertz (THz) range, to have a better knowledge of the physical phenomena involved in THz light-matter interactions. This understanding would allow to improve the analysis of the THz images acquired and to have a better definition of the optical systems configurations that we use. To achieve this work, we compare the results coming from the model with those from the experiments led by THz imaging by Terahertz Waves Technologies. In the future, the modelling could become a predictive tool for the characterization of materials in the THz domain.THz waves are located between far infrared and microwaves in the electromagnetic spectrum going from 0.01 mm to 3 mm (or 100 GHz to 30 THz). These waves benefit from advantages of the optical waves and from microwaves depending on used frequencies. THz imaging presents a high potential one for the characterization on the material, because these waves can penetrate a lot of materials which are opaque in the visible and the infrared lights. Detection of defects, delaminations, the presence of humidity, etc…, are examples of the problems which can be investigated with THz light.At first, I was able to model the optical response of planar, homogenous, isotropic and polymeric samples with good agreements between the calculation and the measurement. These results allowed to realize first modellings of images which are consistent with THz imaging. Therefore, the study is enlarged to anisotropic materials which exist in the current industrial environment as well as the objects of full cylindrical shape. The developed models consider the complex refractive index of a sample and its thickness, that is why a chapter is devoted to the method of estimation of these parameters from measurements coming from THz Time-Domain Spectrocopy signals which was implemented
Fluerasu, Anca. "Modélisation de champs dans le domaine spatio-temporel par une méthode de frame de Gabor : application à la caractérisation du canal indoor millimétrique." Université de Marne-la-Vallée, 2003. http://www.theses.fr/2003MARN0167.
The use of a Gabor frame based decomposition of source fields allows the representation of radiated fields as a superposition of shifted and rotated Gaussian beams. Their tracking through multiple reflexions and transmissions is straightforward owing to Gaussian beams asymptotic properties. Fields can then be evaluated by summation of analytic terms representing transformed Gaussian beams. The method is applied for indoor propagation channel characterization at 60 GHz. Simulations of amplitude-delay profiles are performed, and channel characteristics, such as mean excess delay and RMS delay spread, are extracted from these profiles. A measurement campaign has been carried out in order to validate the proposed method. A formulation in the time domain is proposed, where pulsed beams are launched from the source. Such a formulation should enhance computational efficiency for non stationary or ultra wide band channel characterizations
Petit, Frédéric. "Modélisation et simulation d'une chambre réverbérante à brassage de modes à l'aide de la méthode des différences finies dans le domaine temporel." Phd thesis, Université de Marne la Vallée, 2002. http://tel.archives-ouvertes.fr/tel-00003238.
électromagnétiques connaît une croissance sans précédent depuis quelques années, grâce
notamment au développement de la téléphonie mobile. La chambre réverbérante est un
moyen d'essais qui permet d'étudier l'influence de ces ondes électromagnétiques sur un
appareil électronique particulier. Cependant, le fonctionnement d'une chambre
réverbérante étant complexe, il est primordial de procéder à des simulations afin de
déterminer quels sont les paramètres cruciaux entrant en jeu.
Le travail de cette thèse consiste à modéliser et à simuler le fonctionnement d'une
chambre réverbérante à l'aide de la méthode des différences finies dans le domaine
temporel. Après une brève étude portant sur quelques résultats de mesures de champ et
de puissances effectuées dans une chambre réverbérante, le chapitre~2 aborde les
différents problèmes liés à la modélisation de la chambre. La notion de pertes étant
déterminante pour évaluer le fonctionnement d'une chambre réverbérante, deux méthodes
implémentant ces pertes sont aussi exposées dans ce chapitre. L'étude menée dans le
chapitre~3 consiste à analyser l'influence du brasseur sur les premiers modes propres
de la chambre, ceux-ci pouvant être décalés de plusieurs MHz. Le chapitre~4 présente
des résultats de simulations en hautes fréquences comparés à des résultats
statistiques théoriques. Le cas de la présence d'un objet au sein de la chambre
pouvant perturber le champ est aussi abordé. Enfin, le chapitre~5 montre une
comparaison des résultats statistiques dans le cas où l'on considère plusieurs formes
de brasseurs.
Silly-Carette, Jessica. "Modélisation avancée de l'absorption des ondes électromagnétiques dans les tissus biologiques : schémas en temps, approches adjointe et stochastique." Paris 6, 2008. http://www.theses.fr/2008PA066368.
Truong, Quoc Thanh. "Etude géophysique de l'aquifère peu profond du district rural de Cu Chi et de sa vulnérabilité, région de HoChiMinh City, Viet Nam." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALU005.
Ho Chi Minh City (HCMC) region in the south of Vietnam faces significant challenges from climate change and subsidence, with more frequent flooding, and threat of saltwater intrusion. As a proactive measure for future mitigation and development, particular attention is being paid towards sustainable groundwater resources. The northwest, characterized by high terrain and identified as the regional recharge area, is earmarked as a potential crucial groundwater reserve for the future.The primary objective of this research is to understand better shallow groundwater resources and their vulnerability to human practices. The second objective is to evaluate several geophysical methods for hydrogeology in the sedimentary geological context of the Saigon River area. An extensive geophysical field investigation was conducted using Time-Domain Electromagnetic (TDEM), Frequency Electromagnetic (FEM), and Electrical Resistivity Tomography (ERT) methods, being evaluated for their sensitivity to clayey layer detection using numerical modeling prior to the survey. These methods proved effective in characterizing the geometry of the aquifer and aquitard system to a depth of 150 meters for TDEM method, very sensitive to electrically conductive clayey layers. The research revealed that the absence of a surface clay layer thus facilitates groundwater recharge, posing a risk of surface pollutants easily infiltrating the aquifer. Moreover, deeper clay layers are discontinuous, increasing the vulnerability to the downward spread of contaminants. The research also points towards a new conceptual model of the aquifer involving geological transgression-regressions scenarios to explain the spatial distribution of the clayey aquitards, showing meanders and floodplains of the ancient Saigon River at depth.Innovatively, the Nuclear Magnetic Resonance (NMR) method was also employed at the laboratory scale to classify the aquifer using core extracted from boreholes tests. Coupled with grain size analysis, the results show that the shallow aquifer is fine-grained. As field-scale NMR was unsuccessfully applied due to high noise conditions, analyses with pumping and tracer tests gave additional data, leading to the conclusion that NMR results are still preliminary as several improvements have to be made regarding noise reduction and specific yield determination.For the future, the research paves the way for constructing 3D hydrodynamic models for sustainable exploitation. Vadose zone models will also facilitate the evaluation of pollution in the water table. Finally, this research highlights the efficiency of resistivity-based geophysical methods for sedimentary shallow aquifers characterization in Saigon River and HCMC regions. Combined with hydrogeological methods, future geophysical studies will help to address future groundwater challenges and contribute to the south of Vietnam’s resilience against climate change impacts
WANG, YI-DE. "Localisation de sources dans le domaine temporel." Rennes 1, 1989. http://www.theses.fr/1989REN10100.
Alestra, Stéphane. "Problème inverse dans le domaine temporel pour des milieux stratifiés." Paris 13, 1997. http://www.theses.fr/1997PA132020.
Smail, Mohamed. "Identification des paramètres des structures vibrantes dans le domaine temporel." Châtenay-Malabry, Ecole centrale de Paris, 1994. http://www.theses.fr/1994ECAP0354.
Degerine, Serge. "Fonction d'autocorrélation partielle et estimation autorégressive dans le domaine temporel." Grenoble 1, 1988. http://tel.archives-ouvertes.fr/tel-00243761.
Degerine, Serge. "Fonction d'autocorrélation partielle et estimation autorégressive dans le domaine temporel." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37613056x.
Degerine, Serge Le Breton Alain Van Cutsem Bernard. "Fonction d'autocorrélation partielle et estimation autorégressive dans le domaine temporel." S.l. : Université Grenoble 1, 2008. http://tel.archives-ouvertes.fr/tel-00243761.
Volpert, Thibault. "Étude d'un schéma différences finies haute précision et d'un modèle de fil mince oblique pour simuler les perturbations électromagnétiques sur véhicule aérospatial." Thesis, Toulouse, ISAE, 2014. http://www.theses.fr/2014ESAE0042/document.
This thesis is about the study of a high spatial finite element method whichcan be assimilated at an extension of the Yee schema. In the next, this method is also called high order finite difference method. In the first chapter, we give a non exhaustive recall of the major methods used to treat EMC problems and we show the necessity to have this kind of schema to simulate efficiently some EMC configurations. In the second chapter, the principle of the numerical method is presented and a stability condition is given. A numerical study analysis of the schema convergence is also done. Next, we show the interest to have the possibility to use local spatial order by cell in each direction of the computational domain. Some canonic examples are given to show the advantages interms of CPU time and memory storage of the method by comparison with Yee’s scheme and DG approach. In the third chapter, we define and validate on several examples,some physical models as thin wire, materials and perfectly metallic ground in presence of a plane wave, to have the possibility to treat EMC problems. The fourth chapter is about a hybridization strategy between our high order FDTD method and a DG schema.We focalize our study on a hybrid method which provides an energy conservation of the continuous problem. A numerical example is given to validate the method. Finally, in the last chapter, we present some simulations on industrial problems to show the possibility of the method to treat realistic EMC problems
Théodore, Antoine. "Actions du vent sur les ouvrages souples dans le domaine temporel." Thesis, Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAX009.
Flexible structures such as cable-stayed bridges are subject to dynamic wind loads. These are usually divided into two categories, flutter which is a motion-induced load and buffeting, which is generally considered as an uncoupled load. When these two phenomena are intertwined, it becomes difficult to use spectral methods and time simulation represents a relatively new and promising alternative.The most difficult challenge is to simulate the torsional stall flutter caused by additionnal damping. However, this phenomenon, which was responsible for the collapse of Tacoma narrow bridge, is still central to the design of civil engineering structures. This study is based on the development of a new temporal formulation of the motion-induced pitch moment, which can be easily combined with representations of the unsteady effects of wind. The construction of the new aeroelastic model is based on the introduction of a time delay between the instantaneous position of the studied deck and the aerodynamic forces.The validation of the model is provided by wind tunnel tests. They are carried out with elastically supported sectional models, subject to the effects of a steady wind, those of a gust, as well as those of a highly turbulent wind. Three sections are considered, stable or unstable: the Millau Bridge, the Tacoma Bridge and a NACA-4412 airfoil
KIEN, DANY PENN. "Etude dans le domaine temporel de la dynamique cristalline d'oxydes ferroelectriques." Paris 7, 1994. http://www.theses.fr/1994PA077258.
Lasota, Henryk. "Etude du champ acoustique des sources planes dans le domaine temporel." Valenciennes, 1985. https://ged.uphf.fr/nuxeo/site/esupversions/fee89b5a-c7ee-4e72-afcc-954bb74cb0a2.
Cacoveanu, Corneliu-Remus. "Développement de la méthode TLM : simulation des pertes dans le domaine temporel." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0167.
Le, Roux Erwan. "Identification des excitations aéroacoustiques par problème inverse vibratoire dans le domaine temporel." Electronic Thesis or Diss., Le Mans, 2023. http://www.theses.fr/2023LEMA1036.
Qualifying the acoustic performances of structures that are submitted to a boundary layer excitation is a complex and expensive process. In order to make it more accessible and reproducible, the VIRTECH project aims to identify the acoustic pressure that is generated by such excitation. As it is difficult to discriminate the acoustic part from the aerodynamic part with a direct measurement, an inverse vibration method has to be used, that can analyze the response in vibration of a structure submitted to boundary layer excitation. The Corrected Force Analysis Technique (CFAT), has already been successfully used to identify such pressure field in the frequency domain. Here, a time domain application is proposed, as well as another variant of the method, that could potentially be used to identify excitation on more complex structures, such as plane shells
Oustinov, Dimitri. "Etude de lasers à cascade quantique par spectroscopie térahertz dans le domaine temporel." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2011. http://tel.archives-ouvertes.fr/tel-00601157.
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.
Bouchard, Christian. "Imagerie radar ISAR avec algorithmes haute-résolution dans le domaine temporel, appliqués en portée." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq33579.pdf.
Allali, Anthony. "Algorithme de reconstruction itératif pour tomographie optique diffuse avec mesures dans le domaine temporel." Mémoire, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/8909.
Kabani, Fayçal. "Etude des approximations paraxiales : 15 degrés de l'équation des ondes dans le domaine temporel." Paris 9, 1986. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1986PA090050.
Kabani, Fayçal. "Etude des approximations paraxiales 15 degrés de l'équation des ondes dans le domaine temporel." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37598617c.
PODOLAK, PETIT CHRISTINE. "Potentiels tardifs ventriculaires et blocs de branche : etude dans le domaine temporel et frequentiel." Amiens, 1993. http://www.theses.fr/1993AMIEM021.
Laisné, Alexandre. "Etude d'antennes à résonateur diéléctrique à l'aide de la FDTD (Méthode des Différences Finies dans le Domaine Temporel) et de la MR/FDTD (Méthode des Différences Finies dans le Domaine Temporel à régions multiples." Rennes, INSA, 2002. http://www.theses.fr/2002ISAR0003.
Besse, Olivier. "Contribution à l'étude de la propagation électromagnétique en zone urbaine dans le domaine millimétrique." Limoges, 2000. http://www.theses.fr/2000LIMO0016.
Nair, Raji sasidharan. "Contribution au développement de tags chipless et des capteurs à codage dans le domaine temporel." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00841376.
Thibault, Karl. "Corrélateur courant-courant dans le domaine temporel d'une jonction tunnel mesuré par spectroscopie micro-onde." Mémoire, Université de Sherbrooke, 2014. http://savoirs.usherbrooke.ca/handle/11143/5351.
Ferrari, Philippe. "Analyse de réseau dans le domaine temporel : méthodes de calibrage d'un système de réflectométrie rapide." Grenoble INPG, 1992. http://www.theses.fr/1992INPG0131.
Bouchard, Jonathan. "Conception d'un système d'acquisition pour la tomographie optique diffuse à mesures dans le domaine temporel." Mémoire, Université de Sherbrooke, 2017. http://hdl.handle.net/11143/11243.
Nair, Raji Sasidharan. "Contribution au développement de tags chipless et des capteurs à codage dans le domaine temporel." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENT008/document.
Chipless RFID tags, owing to their low cost, have opened a new way to the identification systems. Chipless RFID tags operating in the time domain have the advantage of being compatible with large reading distances of the order of a few meters, and also can operate in the ISM frequency bands. However, time domain tags developed until now offer poor coding capacity. This thesis proposes a new method to increase the coding capacity of tags operating in time domain by using C-sections, i.e. the transmission lines are folded so as to have tightly coupled zones that give them a dispersive nature. Another approach based on a multi-layer technique was also introduced, in order to increase the coding capacity considerably. Finally, the proof of concept of a humidity sensor tag based on silicon nanowires is also presented
Sifi, Nedjem-Eddine. "Caractérisation de dispositifs microondes dans le domaine temporel par identification à des modèles électriques équivalents." Grenoble INPG, 1995. http://www.theses.fr/1995INPG0092.
Retailleau, Clémence. "Développement de nouveaux matériaux polymères chargés pour le blindage électromagnétique dans le domaine de l'aéronautique." Electronic Thesis or Diss., Lyon, 2020. http://www.theses.fr/2020LYSE1059.
With the tremendous technological developments related to the accelerated growth in the field of telecommunications, our society is increasingly facing the problem of electromagnetic pollution. The electromagnetic pollution, expected to grow even faster in the coming years, leads to electromagnetic interference phenomena which disturb instruments and systems, and is therefore an important risk for industrial applications and human beings. Developing materials to protect people, instruments and systems from electromagnetic interference phenomena and, furthermore, to reduce the electromagnetic pollution in the environment becomes thus a major challenge in our society. The goal of our study is to respond to this challenge by developing composite materials with an enhanced shielding efficiency of electromagnetic radiation. In this work, the relationship between shielding efficiency at low frequencies and the electrical properties of a material was analyzed first. After that, the shielding performance has been systematically evaluated as a function of the nature (Carbon Black, Carbon nanotubes, Nickel coated Graphite, Silver coated Aluminum particles and silver coated glass fibers) and the volume fraction of conductive fillers. Furthermore, the impact of processing on the final performance of materials, representing a crucial aspect for many industrial applications, has been investigated by employing ionic liquids as processing aids. The guideline of this project was to systematically investigate the main factors that play an important role in enhancing the shielding effectiveness of composite materials. Finally, higher performance composite materials have been developed to address industrial issues
Madéo, Julien. "Spectroscopie dans le domaine temporel et non-linéarités optiques résonantes des lasers à cascade quantique térahertz." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2011. http://tel.archives-ouvertes.fr/tel-00661325.
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.
Bodi, Geoffroy. "Débruitage, déconvolution et extraction de caractéristiques de signaux dans le domaine temporel pour imagerie biomédicale optique." Mémoire, Université de Sherbrooke, 2010. http://savoirs.usherbrooke.ca/handle/11143/1588.
Ducos, Lionel. "Contribution aux méthodes d'étalonnage en réflectométrie optique dans le domaine temporel. Mesure précise des faibles réflectances." Limoges, 1994. http://www.theses.fr/1994LIMO0021.
BEGASSAT, YANN. "Elaboration d'un simulateur electromagnetique global base sur la methode des differences finies dans le domaine temporel." Rennes, INSA, 1996. http://www.theses.fr/1996ISAR0007.
Ezzine, Montassar. "Observation et commande des systèmes linéaires dans les domaines temporel et fréquentiel." Electronic Thesis or Diss., Nancy 1, 2011. http://www.theses.fr/2011NAN10055.
In this dissertation, we investigated the problems of the estimation but also the controller based-observer design in the time and frequency domains, for both standard linear systems and more general systems algebro-differentials ones also called singular systems. The goal of our approach is to propose easily implementable results and to cover the largest possible class of linear systems. So, we began to propose methods for unknown inputs observers design for linear systems without and with delay, subject to unknown inputs which can result from noise, sensors and actuators faults ... We search here to decouple the unknown inputs and the dynamics of the observation error. The time domain method is based on LMIs permitting to find the gain matrix implemented in the observer matrices. The LMI approach is deduced from various bounded lemmas which themselves are based on Lyapunov approach. The frequency domain synthesis is derived from time domain results by defining suitable MFDs and using the factorization approach. We then propose, filters that permits to ensure, in addition to the stability, an H-infinity performance criteria, i.e we search to attenuate the perturbations effect, supposed unknown but of bounded energy, on the dynamics of the estimation error. One of the main contributions of our work, is to propose a new writing of the error dynamics in a singular form in order to avoid the time derivative of the disturbance in the error dynamics. So, the constraints that generally exist on the matrices of synthesized unbiased filters can be relaxed, i.e filters, that they do not depend explicitly on the state x(t) of the system and on the input u(t). The frequency method is deduced from time domain approach by using the factorisation approach. It should be noted that this frequency domain description, (input-output) representation, may allow an easy implementation in the frequency domain when it is recommended. Finally, we apply the proposed estimation methods to control purpose. In fact, in a first part, we propose a new direct synthesis of a controller based on a H-infinity filter directly in the frequency domain for standard linear systems. Then, we focus our attention on singular systems for both continuous and discrete cases and we propose to search for a linear control law using a functional filter which ensures an H-infinity performance criteria. Our approach is obtained into two steps. In fact, first, we search for a linear control law which ensures some specifications for the closed loop system (stability,...). The state feedback is seen as a functional of the state and is then estimated using our previous results on the H-infinity filtering