Dissertations / Theses on the topic 'Systèmes adaptatifs (technologie) – Simulation, Méthodes de'
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Marques, Nicolas. "Méthodologie et architecture adaptative pour le placement efficace de tâches matérielles de tailles variables sur des partitions reconfigurables." Electronic Thesis or Diss., Université de Lorraine, 2012. http://www.theses.fr/2012LORR0139.
FPGA-based reconfigurable architectures can deliver appropriate solutions for several applications as they allow for changing the performance of a part of the FPGA while the rest of the circuit continues to run normally. These architectures, despite their improvements, still suffer from their lack of adaptability when confronted with applications consisting of variable size material tasks. This heterogeneity may cause wrong placements leading to a sub-optimal use of resources and therefore a decrease in the system performances. The contribution of this thesis focuses on the problematic of variable size material task placement and reconfigurable region effective generation. A methodology and an intermediate layer between the FPGA and the application are proposed to allow for the effective placement of variable size material tasks on reconfigurable partitions of a predefined size. To approve the method, we suggest an architecture based on the use of partial reconfiguration in order to adapt the transcoding of one video compression format to another in a flexible and effective way. A study on the reconfigurable region partitioning for the entropy encoder material tasks (CAVLC / VLC) is proposed in order to show the contribution of partitioning. Then an assessment of the gain obtained and of the method additional costs is submitted
Bruguier, Florent. "Méthodes de caractérisation et de surveillance des variations technologiques et environnementales pour systèmes reconfigurables adaptatifs." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2012. http://tel.archives-ouvertes.fr/tel-00965377.
Véjar, Andrés. "Génération de modèles de simulation adaptatifs, pilotée par les trajectoires produits." Electronic Thesis or Diss., Nancy 1, 2011. http://docnum.univ-lorraine.fr/prive/SCD_T_2011_0144_VEJAR.pdf.
This thesis work proposes a novel method for the automatic generation of simulation code of discrete event systems. This method uses the location information of the products during operation of the system. This flow, of tuples (product id, location, time) is the input of the proposed algorithm that generates a queueing-network simulation model. This type of approach can achieve a significant time gain for the design, maintenance and on-line reconfiguration of the model. The thesis is composed on five chapters. The first chapter poses the problem and fixes the theoretical framework of the thesis. The second chapter is a literature review of the broad sense of simulation and present works using the notion of trajectories for modeling. The third chapter is to highlight the proposal of the heart of this thesis. The fourth chapter describes the generator developed. The fifth and final chapter presents the experiments and the validation of the generator
Fourniols, Jean-Yves. "Contribution à l'étude des problèmes de compatibilité électromagnétique dans les systèmes micro-électroniques submicroniques." Toulouse, INSA, 1996. http://www.theses.fr/1996ISAT0003.
Louleh, Ziad. "Modélisation et conduite des réacteurs discontinus par analyse des flux thermiques." Toulouse, INPT, 1996. http://www.theses.fr/1996INPT037G.
Véjar, Andrés. "Génération de modèles de simulation adaptatifs, pilotée par les trajectoires produits." Phd thesis, Université Henri Poincaré - Nancy I, 2011. http://tel.archives-ouvertes.fr/tel-00670061.
Barbier, Magali. "Modélisation et conduite des systèmes de production d'assemblage." Toulouse, ENSAE, 1990. http://www.theses.fr/1990ESAE0004.
Persegol, Christian. "Modélisation et simulation de défaillances dans les systèmes de production discrets." Montpellier 2, 1990. http://www.theses.fr/1990MON20199.
Iris, Julien. "Contribution de la méthodologie et de la technologie décisionnelle pour l'aide à l'évaluation des risques naturels dans le secteur de l'assurance en France." Paris, ENMP, 2009. http://tel.archives-ouvertes.fr/tel-00383306.
The aim of the thesis is to evaluate the contribution of geodecisional approach for better analysing the problematic of natural disaster impacts on the French insurance market. An insurance company aims to get better insight on the natural disaster vulnerability. Two concerns have been identified: the first concern is “mutual” by reinforcing the efficiency of the public policy of natural disaster prevention, the second concern is “individual” by reinforcing the financial solidity of the company facing natural disaster event that could occur on their insurance portfolio. The offers in terms of tools and services to cover these requirements are limited for the French insurance market for two main reasons: first of all the French natural disaster indemnification system is based on a solidarity principle which has never encouraged the insurers to evaluate precisely the level of exposure of their clients to natural hazard, also, the second point is the heterogeneity of the spatial and non spatial data on the territory which has generated more complexity for the appropriation of the problematic by the French insurance companies. The thesis propose the “geodecisional approach” including a data modelling methodology (spatial multidimensional modelling) and technological components (for extraction, transformation, loading, restitution) in order to propose interface for exploring detailed and aggregated indicators combining spatial and non spatial analysis in a logical view according to the enterprise strategy. The idea is to adapt this approach to consolidate indicators for natural disaster vulnerability on the “mutual” and on the “individual” perspective. The different models are combining natural hazard maps like flood modellings, risk zoning maps in urbanism plans (“Plan de Prévention des Risques”) but also cadastral data and maps, geostatistical data about exposures and insurance data from an insurance company. The thesis will present the state of the art of the problematic and will propose a method for modelling and for implementing exploratory prototypes on case studies. The technology chosen to build the prototypes is Spatial OLAP developed at the Center of research in Geomatics at Laval University in Quebec
Broy, Perrine. "Evaluation de la sûreté de systèmes dynamiques hybrides complexes : application aux systèmes hydrauliques." Phd thesis, Université de Technologie de Troyes, 2014. http://tel.archives-ouvertes.fr/tel-01006308.
Bellot, Jean-Christophe. "Modélisation de la chromatographie préparative non-linéaire des biomolécules." Toulouse, INSA, 1994. http://www.theses.fr/1994ISAT0034.
Aouabdia, Nabila. "Etude d'un capteur à base de résonateur planaire pour applications au contrôle non destructif." Paris 6, 2012. http://www.theses.fr/2012PA066137.
The objective of this thesis is the study of a sensor based on a rectangular planar resonator (RPR) for applications to Non-destructive Evaluation (NDE). In this context, two approaches were defined. First one, conception, modeling, simulation and realization have been made on rectangular structures with an anisotropic substrate and an isotropic superstrate. An analytic model was developed by using the Moments Method (MoM) and validated with two electromagnetic commercial softwares (HFSS and CST). The second approach of this work was focused on the characterization of biological materials with the RPR prototypes used as an applicator for Non-destructive Evaluation in the medical domain. Our center of interest was oriented towards the measurements of dielectric properties of biological tissues replacing the superstrate in order to extract their complex permittivity. Measurements were made in the Laboratoire d'Électronique et Électromagnétisme (L2E) on several samples (liver, fat, chicken, butter, foie gras, etc…). Measurements associated with electromagnetic simulations have enabled to obtain microwave dielectric parameters of these materials
Peralta, Cortes Héctor. "Création de critères d'évaluation de dispositifs d'assistance pour personnes en situation de handicap." Versailles-St Quentin en Yvelines, 2009. http://www.theses.fr/2009VERS0026.
PLEIA project is a methodological platform of different software tools for the evaluation of different interfaces for persons with disabilities. This platform is based on different modules: PLEIA Functional awaking which is used to study the interactions between the interfaces peripheral and awaking systems (toys and robots), PLEIA Exercise which is based on the pointing devices for a personal computer, PLEIA Functional which is oriented to the command interfaces for the technical aids such as electric powered wheelchair. These modules are used by occupational therapists to create a basic evaluation. It tries to create tests with the integration of interfaces and performance analysis of patients. This thesis is based on PLEIA Exercise and Evaluation modules. The experimental results are shown for myopathic Children. The obtained results are promising
May, Jean-Philippe, and Fy Rakotoarivelo. "Étude des concepts de réalisation et de fonctionnement d'un simulateur de circuit analogique ouvert et structuré." Toulouse, INPT, 1991. http://www.theses.fr/1991INPT047H.
Sun, Qi. "Analyse de Performances de Régulateurs de Vitesse Adaptatifs Coopératifs." Thesis, Ecole centrale de Lille, 2016. http://www.theses.fr/2016ECLI0020/document.
This PhD thesis is dedicated to the performance analysis of Cooperative Adaptive Cruise Control (CACC) system for intelligent vehicle platoon with the main aims of alleviating traffic congestion and improving traffic safety. At first, the Constant Time Headway (CTH) spacing policy for vehicle platoon is introduced. Based on this spacing policy, a novel decentralized Two-Vehicle-Ahead CACC (TVACACC) system is proposed, in which the desired acceleration of two front vehicles is taken into account. Then the string stability of the proposed system is theoretically analyzed. It is shown that by using the multiple wireless communication among vehicles, a better string stability is obtained compared to the conventional system. Vehicle platoon in Stop-and-Go scenario is simulated with both normal and degraded communication.Secondly, a graceful degradation technique for CACC was presented, as an alternative fallback strategy when wireless communication is lost or badly degraded. The proposed strategy, which is referred to DTVACACC, uses Kalman filter to estimate the preceding vehicle’s current acceleration as a replacement of the desired acceleration. It is shown that the performance is maintained at a much higher level.Finally, a Reinforcement Learning (RL) approach of CACC system is proposed. The policy-gradient algorithm is introduced to achieve the longitudinal control. Then simulation has shown that this new RL approach results in efficient performance for CACC
Hoang, Thi Quynh Van. "Maillage cartésien non-conforme pour la méthode TLM : application à la conception de rectennas compactes." Nice, 2012. http://www.theses.fr/2012NICE4045.
The work presented in this thesis is divided into two parts. The first part is devoted to the development of a computational electromagnetic code based on the TLM method (Transmission Line Matrix) to simulate structures with multi-scale aspects, requiring multigrids-subgrids locally refined. This leads to solve a simultaneous spatial and time domain coupling problem. As it was proved to be very effective for spatial domain coupling, the technique using transformers introduced by Wlodarczyk is implemented. Actual work is focussed on the time domain coupling to allow using the maximum time step in each sub grid. Interpolation techniques such as Taylor second order and cubic Spline and also a prediction technique inspired from the Prony-Pisarenko method for power spectral density estimation were implemented and evaluated. The second part is devoted to the design of rectennas. Such non linear and multi-scale structures, integrating Schottky diodes, are key elements of wireless power transmission or energy harvesting systems. It is demonstrated that modelling rectennas with a global circuit-electromagnetic simulation tool in time domain as with TLM provides a substantial advantage compared to commercial simulation softwares that requires various experimental adjustments, rendering complex the design process. It becomes then possible to accurately predict the conversion efficiency of an entire rectenna. The design and complete experimental characterization of two compact rectennas operating at 2. 45GHz are finally presented
Martin, Michel Camille Eugène. "Pourquoi et comment rendre pédagogique la communication technique." Lille 1, 2003. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2003/50377-2003-35.pdf.
Boussier, Jean-Marie. "Modélisation de comportements dans les systèmes dynamiques : Application à l'organisation et à la régulation de stationnement et de déplacement dans les Systèmes de Trafic Urbain." Phd thesis, Université de La Rochelle, 2007. http://tel.archives-ouvertes.fr/tel-00411272.
Kaushik, Rituraj. "Data-Efficient Robot Learning using Priors from Simulators." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0105.
As soon as the robots step out in the real and uncertain world, they have to adapt to various unanticipated situations by acquiring new skills as quickly as possible. Unfortunately, on robots, current state-of-the-art reinforcement learning (e.g., deep-reinforcement learning) algorithms require large interaction time to train a new skill. In this thesis, we have explored methods to allow a robot to acquire new skills through trial-and-error within a few minutes of physical interaction. Our primary focus is to incorporate prior knowledge from a simulator with real-world experiences of a robot to achieve rapid learning and adaptation. In our first contribution, we propose a novel model-based policy search algorithm called Multi-DEX that (1) is capable of finding policies in sparse reward scenarios (2) does not impose any constraints on the type of policy or the type of reward function and (3) is as data-efficient as state-of-the-art model-based policy search algorithm in non-sparse reward scenarios. In our second contribution, we propose a repertoire-based online learning algorithm called APROL which allows a robot to adapt to physical damages (e.g., a damaged leg) or environmental perturbations (e.g., terrain conditions) quickly and solve the given task. In this work, we use several repertoires of policies generated in simulation for a subset of possible situations that the robot might face in real-world. During the online learning, the robot automatically figures out the most suitable repertoire to adapt and control the robot. We show that APROL outperforms several baselines including the current state-of-the-art repertoire-based learning algorithm RTE by solving the tasks in much less interaction times than the baselines. In our third contribution, we introduce a gradient-based meta-learning algorithm called FAMLE. FAMLE meta-trains the dynamical model of the robot from simulated data so that the model can be adapted to various unseen situations quickly with the real-world observations. By using FAMLE with a model-predictive control framework, we show that our approach outperforms several model-based and model-free learning algorithms, and solves the given tasks in less interaction time than the baselines
Marpinard, Alain. "Effets des mécanismes d'exception sur la structure des logiciels : Application aux systémes ADA sûrs de fonctionnement." Toulouse, INSA, 1993. http://www.theses.fr/1993ISAT0004.
Fragne, Didier. "Proposition de l'architecture de l'agent gestionnaire du modèle de l'apprenant dans un système tuteur multi-agents en apprentissage de la lecture : contribution au projet AMICAL." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2009. http://tel.archives-ouvertes.fr/tel-00449160.
Marques, Nicolas. "Méthodologie et architecture adaptative pour le placement efficace de tâches matérielles de tailles variables sur des partitions reconfigurables." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0139/document.
FPGA-based reconfigurable architectures can deliver appropriate solutions for several applications as they allow for changing the performance of a part of the FPGA while the rest of the circuit continues to run normally. These architectures, despite their improvements, still suffer from their lack of adaptability when confronted with applications consisting of variable size material tasks. This heterogeneity may cause wrong placements leading to a sub-optimal use of resources and therefore a decrease in the system performances. The contribution of this thesis focuses on the problematic of variable size material task placement and reconfigurable region effective generation. A methodology and an intermediate layer between the FPGA and the application are proposed to allow for the effective placement of variable size material tasks on reconfigurable partitions of a predefined size. To approve the method, we suggest an architecture based on the use of partial reconfiguration in order to adapt the transcoding of one video compression format to another in a flexible and effective way. A study on the reconfigurable region partitioning for the entropy encoder material tasks (CAVLC / VLC) is proposed in order to show the contribution of partitioning. Then an assessment of the gain obtained and of the method additional costs is submitted
Lalanne, Felipe. "Modeling and methodologies for the test of IMS services." Phd thesis, Institut National des Télécommunications, 2012. http://tel.archives-ouvertes.fr/tel-00787566.
Aouag, Sofiane. "Individualisation de l'apprentissage dans un Système Tuteur Intelligent : cas de l'apprentissage de la lecture dans un système AMICAL." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2010. http://tel.archives-ouvertes.fr/tel-00658846.
Ochoa, Ruiz Gilberto. "A high-level methodology for automatically generating dynamically reconfigurable systems using IP-XACT and the UML MARTE profile." Phd thesis, Université de Bourgogne, 2013. http://tel.archives-ouvertes.fr/tel-00932118.