Rozprawy doktorskie na temat „Réseaux de zone de contrôleur”
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Vodinh-Lorang, Li Elisabeth. "Contrôle de la traînée dans la zone de paroi d'un canal plan turbulent à l'aide de réseaux de neurones". Paris 6, 2007. http://www.theses.fr/2007PA066672.
Pełny tekst źródłaKhatib, Natasha al. "Intrusion detection with deep learning for in-vehicle networks". Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAT009.
Pełny tekst źródłaIn-vehicle communication which refers to the communication and exchange of data between embedded automotive devices plays a crucial role in the development of intelligent transportation systems (ITS), which aim to improve the efficiency, safety, and sustainability of transportation systems. The proliferation of embedded sensor-centric communication and computing devices connected to the in-vehicle network (IVN) has enabled the development of safety and convenience features including vehicle monitoring, physical wiring reduction, and improved driving experience. However, with the increasing complexity and connectivity of modern vehicles, the expanding threat landscape of the IVN is raising concerns. A range of potential security risks can compromise the safety and functionality of a vehicle putting the life of drivers and passengers in danger. Numerous approaches have thus been proposed and implemented to alleviate this issue including firewalls, encryption, and secure authentication and access controls. As traditional mechanisms fail to fully counterattack intrusion attempts, the need for a complementary defensive countermeasure is necessary. Intrusion Detection Systems (IDS) have been thus considered a fundamental component of every network security infrastructure, including IVN. Intrusion detection can be particularly useful in detecting threats that may not be caught by other security measures, such as zero-day vulnerabilities or insider attacks. It can also provide an early warning of a potential attack, allowing car manufacturers to take preventive measures before significant damage occurs. The main objective of this thesis is to investigate the capability of deep learning techniques in detecting in-vehicle intrusions. Deep learning algorithms have the ability to process large amounts of data and recognize complex patterns that may be difficult for humans to discern, making them well-suited for detecting intrusions in IVN. However, since the E/E architecture of a vehicle is constantly evolving as new technologies and requirements emerge, we propose different deep learning-based solutions for different E/E architectures and for various tasks including anomaly detection and classification
Villain, Benjamin. "Nouvelle génération de contrôleur d'accès réseau : une approche par réseaux logiciels". Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066663/document.
Pełny tekst źródłaThis thesis presents the importance of cross-layer network information for network applications in the context of network access control. The dissertation exposes a novel architecture in which a network access controller is mutualized in the Cloud. This architecture allows to address a key market segment for clients unwilling to buy expensive hardware to control their network. Multiple challenges come into play when hosting the controller remotely. Indeed cross-layer information are no longer available which prevents the controller from correctly controlling users activity. A first implementation to share cross-layer information is presented in chapter 2. It leverages specialized session border controllers to send these data in the application protocol, here HTTP. Then chapter 3 presents an innovative solution for the cross-layering problem which allows to intrumentalize network flows with SDN protocols. The solution focuses on a web portal redirection but is extendable to any kind of protocols. The implementation permits to intercept and modify flows in order to input cross-layer data within another network protocol. This solution was implemented in the OpenDaylight OpenFlow controller and shows great results. The mutualized approach coupled with the SDN cross-layer framework allow to build flexible networks with almost no configuration of on-site equipments. The central network controller reduces the overal cost of the solution by being mutualized among multiple clients. Moreover, having the ability to intrumentalize network traffic in software allows to implement any kind of custom behavior on the runtime
Villain, Benjamin. "Nouvelle génération de contrôleur d'accès réseau : une approche par réseaux logiciels". Electronic Thesis or Diss., Paris 6, 2015. http://www.theses.fr/2015PA066663.
Pełny tekst źródłaThis thesis presents the importance of cross-layer network information for network applications in the context of network access control. The dissertation exposes a novel architecture in which a network access controller is mutualized in the Cloud. This architecture allows to address a key market segment for clients unwilling to buy expensive hardware to control their network. Multiple challenges come into play when hosting the controller remotely. Indeed cross-layer information are no longer available which prevents the controller from correctly controlling users activity. A first implementation to share cross-layer information is presented in chapter 2. It leverages specialized session border controllers to send these data in the application protocol, here HTTP. Then chapter 3 presents an innovative solution for the cross-layering problem which allows to intrumentalize network flows with SDN protocols. The solution focuses on a web portal redirection but is extendable to any kind of protocols. The implementation permits to intercept and modify flows in order to input cross-layer data within another network protocol. This solution was implemented in the OpenDaylight OpenFlow controller and shows great results. The mutualized approach coupled with the SDN cross-layer framework allow to build flexible networks with almost no configuration of on-site equipments. The central network controller reduces the overal cost of the solution by being mutualized among multiple clients. Moreover, having the ability to intrumentalize network traffic in software allows to implement any kind of custom behavior on the runtime
Liang, Man. "Optimisation du réseau de routes en zone terminale". Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30003/document.
Pełny tekst źródłaCongestion in Terminal Manoeuvring Area (TMA) at hub airports is the main problem in Chinese air transportation system. Facing extremely dense operations in complex TMA, we can consider reducing traffic complexity by solving all potential conflicts in advance with a feasible trajectory control for controllers, or automating a large proportion of routine operations, such as sequencing, merging and spacing. As parallel runways are a common structure of Chinese hub airports, in this thesis, we propose a novel system to integrated sequencing and merging aircraft to parallel runways. Our methodology integrates a Area Navigation (RNAV)-based 3D Multi-Level and Multi-Point Merge System (MLMPMS), a hybrid heuristic optimization algorithm and a simulation module to find good, systematic, operationally-acceptable solutions. First, a Receding Horizon Control (RHC) technique is applied to divide 24-hour traffic optimization problem into several sub- problems. Then, in each sub-problem, a tailored Simulated Annealing (SA) algorithm and a trajectory generation module worn together to find a near-optimal solution. Our primary objective is to rapidly generate conflict-free and economical trajectories with easy, flexible and feasible control methods. Based on an initial solution, we continuously explore possible good solutions with less delay and shorter landing interval on runway. Taking Beijing Capital International Airport (BCIA) as a case to study, numerical results show that our optimization system performs well. First, it has very stable de-conflict performance to handle continuously dense traffic flows. Compared with Hill Climbing (HC), the tailored SA algorithm can always guarantee a conflict-free solution not only for the mixed or segregated parallel approach (arrivals only) pattern, but also for the independent parallel operation (integrated departures and arrivals) pattern. Second, with its unique Multi-Level Point Merge (ML-PM) route network, it can provide a good trajectory control solution to efficiently and economically handle different kinds of arrival flows. It can realize a shorter flying time and a near-Continuous Descent Approach (CDA) descent for arrival aircraft, compared with baseline. It also realizes an easier re-sequencing of aircraft with more relaxed position shifting as well, compared with conventional sequencing method. Theoretically, the Maximum Position Shifting (MPS) can be up to 6 positions, overcoming the hard constraint of 3 position shifts (MPS <= 3). Third, it is efficient for the segregated parallel approach patterns. Compared with hard constrained position shifting, which is often used in current Arrival Manager (AMAN) system and controller's manual-control First Come First Served (FCFS) method, it can reduce the average delay, average additional transit time in super dense arrival situations. The average time flown level per flight is less than 12% of total transit time in TMA. Fourth, in independent parallel patterns, it can provide a range of useful information concerning the associated objective value, the average flying time, crossing trajectories in hot spots between arrivals and departures, the efficiency of using different designed sequencing legs in ML-PM route network
Votsis, Grégoire. "Spécifications système d'un circuit VLSI contrôleur d'accès pour les réseaux locaux temps réel". Paris 11, 1986. http://www.theses.fr/1986PA112294.
Pełny tekst źródłaChevobbe, Stéphane. "Unité de commande pour systèmes parallèles : contrôleur basé sur la mise en oeuvre dynamique de réseaux de Pétri". Rennes 1, 2005. http://www.theses.fr/2005REN1S173.
Pełny tekst źródłaDevapriya, Dewasurendra. "Un système d'intelligence distribuée pour le contrôle des systèmes manufacturiers intégrés : un noyau de contrôleur réseaux de Pétri". Grenoble INPG, 1992. http://www.theses.fr/1992INPG0089.
Pełny tekst źródłaGuyot, Dimitri. "Evaluation sur modèle de simulation thermique dynamique calibré des performances d’un contrôleur prédictif basé sur l’utilisation de réseaux de neurones". Thesis, Paris, HESAM, 2020. http://www.theses.fr/2020HESAC022.
Pełny tekst źródłaThe development of machine learning techniques, particularly neural networks, combined with the development of new information and communication technologies, is shaking up our societies through technological advances in a variety of sectors. The building sector is not spared, so these techniques may represent an interesting opportunity in a context where greenhouse gas emissions must be drastically reduced. The objective of this work is to assess the interest of these techniques in the field of building energy, with the aim of reducing energy consumption and improving thermal comfort. In addition, we ensure that this evaluation is carried out with a global vision, by placing the possible advantages in front of the different needs relating to the development of these technologies. This thesis work is organized in three parts preceded by a detailed introduction intended to give the reader an overview of the various contextual elements, thus allowing the thesis work to be placed in perspective. We then give in the first part the theoretical framework needed to understand the problems encountered during the elaboration and creation of neural networks for building energy applications. Then, a bibliographical study giving the reader a broad overview of the various applications of neural networks in the field of building energy is presented. The second part is devoted to the calibration of the building model that is then used to test and evaluate a predictive controller implementing neural networks. After an explanation of the method used and a detailed presentation of the model, a complete analysis of the calibration results is carried out. We conclude this part with observations and recommendations regarding the standard calibration guidelines recommended by three international organizations. Finally, a practical application using neural networks for the predictive control of indoor temperature is presented in the third part. After a theoretical introduction concerning predictive control, we detail the method employed to train the neural networks used. The results obtained in simulation with a predictive controller are then analyzed and compared with those obtained with two reference controllers for various simulation hypothesis. The predictive controller is thus tested in several scenarios, ranging from an ideal situation to more realistic operating conditions, including two different types of heat emitters, namely radiant ceilings and underfloor heating
Pecqueur, David. "Rôle des protozoo-et virioplancton dans le contrôle des bactérioplancton et phytoplancton en zone côtière Méditerranéenne". Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20149.
Pełny tekst źródłaThe aims of this thesis work were to shed new lights on the functioning of the microbial food web (MFW) in the Thau coastal lagoon through a “global approach” that permit us to study simultaneously the entire MFW components (21 groups) from viruses to microzooplankton. Growth and mortality of microorganisms were studied experimentally along seasons and during a mesocosm experiment. We particularly focus on mortality due to microzooplankton (<200µm) grazing and viral lysis. Responses of the different components of the MFW under a typical Mediterranean forcing, flash flood, was also studied during an in situ monitoring and a mesocosm experiment in the Thau Lagoon.In conclusion, it appears that heterotrophic bacteria show the highest growth rates (until 2.18 day-1). Growth rates of pico- and nanophytolankton groups were always lower than 1.5 day-1. The major cause of mortality of the different group studied, reaching on average 90%, was due to the predation by the microzooplankton. Mortality due to viral lysis appeared to be a “sporadic processes”, less important than microzooplankton grazing indeed. In addition, the observed grazing rates or bacterivory were close to growth rates of microorganisms, suggesting an efficient trophic transfer of the microbial biomass towards higher trophic levels.River flash flood; an important forcing in the Mediterranean coastal zone; triggered on a short time scale, a decrease in growth and grazing rates of microorganisms whereas viral lysis was enhanced. However, the important dynamics of this studied MFW allowed the rapid reestablishment of growth and grazing rates, indicating a strong resilience capability of this system
Arnold, Jean-François. "Proposition d’une stratégie de contrôle à base de logique floue pour la commande d’un circuit d’air d’un moteur Diesel". Rouen, 2007. http://www.theses.fr/2007ROUES004.
Pełny tekst źródłaThe evolution of the anti-pollution standards has led car manufacturers to insert innovative actuators in the air system of diesel engines. In addition to the throttle, engines are now systematically equipped with exhaust gas recirculation valve and variable geometry turbine. These actuators have increased the difficulty to manage the intake manifold pressure and the air flow simultaneously. The strategies currently proposed in the literature do not seem to satisfy correctly all constraints imposed by large-scale production : engine parametric disparity, limited control-unit power, available sensor set, etc. In this context a new strategy based on fuzzy control is proposed. Its first interest is the lack of internal model. In order to test this strategy, a mean-value model of diesel engine was developed and validated experimentally. Using this model, the behaviour of a given diesel engine has been simulated during the Standard Euro Cycle. The simulation results show that the approach proposed is more efficient than strategies currently embedded in cars. Moreover, it is particularly robust in stability and easy to tune regarding the parameters considered. The implementation of the fuzzy controller in an electronic control unit has shown that the proposed strategy can operate in real-time
Levavasseur, Florent. "Structure du paysage et fonctionnement hydrologique : application aux réseaux de fossés en zone viticole méditerranéenne". Thesis, Montpellier, SupAgro, 2012. http://www.theses.fr/2012NSAM0021/document.
Pełny tekst źródłaThe impact of ditch networks on runoff, soil erosion and pollutant transfer is well known at local scale. However, the spatio-temporal variability of ditch networks and the impact of this variability on hydrological processes has not been quantified. The aim of this thesis is thus to quantify the relation between the spatial configuration of ditch networks and the hydrological functioning of Mediterranean vineyards.First, the variability of ditch network density and the extent to which this density depends on the landscape attributes are analyzed. Then, a network simulator is used with a hydrological model to quantify the impact of ditch network density on runoff. In relation to the role of ditch networks in the interception of runoff on hillslopes, the protection against soil erosion procured by ditch networks is studied thanks to geomorphological indicators.Secondly, the spatio-temporal evolution of vegetation covers in ditch networks and its impact on the transfer of pesticides is analyzed. The ditch management regimes and their impact on ditch vegetation are simulated. Thanks to several indicators, it is shown that current management regimes are not optimal in view of pesticide retention.This thesis shows the interest in using a landscape structure model and a landscape functioning model. This allowed to quantify the impact of ditch networks on hydrological processes
Hassan, Khaldon. "Architecture De Contrôleur Mémoire Configurable et Continuité de Service Pour l'Accès à la Mémoire Externe Dans Les Systèmes Multiprocesseurs Intégrés à Base de Réseaux Sur Puce". Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00656470.
Pełny tekst źródłaKhaldon, Hassan. "Architecture de contrôleur mémoire configurable et continuité de service pour l'accès à la mémoire externe dans les systèmes multiprocesseurs intégrés à base de réseaux sur puce". Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENT051/document.
Pełny tekst źródłaThe ongoing advancements in VLSI technology allow System-on-Chip (SoC) to integrate many heterogeneous functions into a single chip, but still demand, because of economical constraints, a single and shared main off-chip SDRAM. Consequently, main memory system design, and more specifically the architecture of the memory controller, has become an increasingly important factor in determining the overall system performance. Choosing a memory controller design that meets the needs of the whole system is a complex issue. This requires the exploration of the memory controller architecture, and then the validation of each configuration by simulation. Although the architecture exploration of the memory controller is a key to successful system design, state of the art memory controllers are not as flexible as necessary for this task. Even if some of them present a configurable architecture, the exploration is restricted to limited sets of parameters such as queue depth, data bus size, quality-of-service level, and bandwidth distribution. Several classes of traffic co-exist in real applications, e.g. best effort traffic and guaranteed service traffic, and access the main memory. Therefore, considering the interaction between the memory subsystem and the interconnection system has become vital in today's SoCs. Many on chip networks provide guaranteed services to traffic classes to satisfy the applications requirements. However, very few studies consider the SDRAM access within a system approach, and take into account the specificity of the SDRAM access as a target in NoC-based SoCs. This thesis addresses the topic of dynamic access to SDRAM in NoC-based SoCs. We introduce a totally customizable memory controller architecture based on fully configurable building components and design a high level cycle approximate model for it. This enables the exploration of the memory subsystem thanks to the ease of configuration of the memory controller architecture. Because of the discontinuity of services between the network and the memory controller, we also propose within the framework of this thesis an Extreme End to End flow control protocol to access the memory device through a multi-port memory controller. The simple yet novel idea is to exploit information about the memory controller status in the NoC. Experimental results show that by controlling the best effort traffic injection in the NoC, our protocol increases the performance of the guaranteed service traffic in terms of bandwidth and latency, while maintaining the average bandwidth of the best effort traffic
Assala, Assala Noël. "Sur le couplage contrôleur-observateur des systèmes non linéaires commandés. Application aux réacteurs de polymérisation, aux réseaux de cinétique chimique et au traitement des eaux usées". Rouen, 1996. http://www.theses.fr/1996ROUES030.
Pełny tekst źródłaGuenounou, Ouahib. "Méthodologie de conception de contrôleurs intelligents par l'approche génétique : application à un bioprocédé". Toulouse 3, 2009. http://thesesups.ups-tlse.fr/546/.
Pełny tekst źródłaIn this work, the problem of design of fuzzy controllers is studied. In a first part, we present a state of art on the techniques used, namely the genetic algorithms and its various alternatives, the neural networks, fuzzy logic and their hybridizations. Taking support on this state of art, we propose a first design method of the fuzzy controllers of Mamdani by simple genetic algorithms. Thereafter, this method is improved by the use of the hierarchical genetic algorithms. These algorithms allow, by the means of the structure of their chromosomes, a better optimization of the controller parameters while eliminating the incoherent rules which can arise, as well as for the first method, at the end of the optimization process. The last method suggested relates to the synthesis of the fuzzy controllers of Sugeno. It is based on a hybrid procedure of training which proceeds in two stages. During the first stage, the fuzzy controller is represented in the form of a network of multi-layer neural networks, whose parameters are optimized by the algorithm of retro propagation. In the second phase, the parameters obtained at the end of the first phase are extracted and optimized by the NSGA-II according to a coding arranged hierarchically. These methods are applied for control of an alcoholic fermentation process in continuous mode
Le, Van Viet. "Optimisation temporelle des réseaux programmables à base de LUT". Phd thesis, Grenoble INPG, 1996. http://tel.archives-ouvertes.fr/tel-00345358.
Pełny tekst źródłaZouaoui, Wael. "Synthèse de commande pour des réseaux de communication énergétiquement performants". Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30002/document.
Pełny tekst źródłaThe computer tools (as the routers and calculators among others) present a high energy consumption. This problem has been already included in mobile networks. The question of energy is just beginning to be considered for "fixed" large-scale systems that reach nowadays high sizes. The objective of this thesis is to address the problem of energy consumption in wired communication networks: provide a certain level of quality of service (QoS) with respect to the packet lost, response speed and robustness with respect to different sampling periods while controlling power consumption of the system. The goal is to design a method from the theory of control, which guarantees these QoS. This technique is applied locally to a network equipment (router, switch ...) and the control law used to distribute temporally the traffic through a controlled node in the wired communications networks. In this work, we considere that the communication between nodes are performed by routers ALR type. In order to deal with energy reduction problem, we propose an extended ALR energy model adapted to control theory. For this model, we need to choose two parameters (ß, ?) allowing to choose the queue length reference, qref, and the related update time-window, Tqref. These parameters have been chosen after performing some simulations with different combinations of parameters (ß, ?). We have seen that the variation of these two parameters provide an impact over the QoS as well as the energy reduction. The theoretical results are then tested in Matlab-Simulink as well as some experiments under the simulator NS-2. Simulations showed that the energy consumption in communications networks is reduced while ensuring a certain level of QoS
Plassart, Loïc. "Contribution à l'optimisation de performances de systèmes de production flow-shop coordonnés par un contrôleur central : propositions pour un ordonnancement efficace de l'activité d'une ressource partagée". Brest, 2008. http://www.theses.fr/2008BRES2054.
Pełny tekst źródłaThe works presented in this thesis consist in organizing the activity of a central controller in charge of the coordination of the production machines of a flow-shop system. The controller reacts to the machine requests by processing the messages it receives and by sending back response messages. The aimed objective consists in optimizing the performances of the considered production systems, notably by minimizing the makespan. We can express the associated scheduling problem by F, C1/pmtnc, permu, block, rj/Cmax according to the Graham’s notation and some extensions we introduce to take into account the specificities of the studied systems. A configurable model built with the formalism of the timed colored Petri nets and its execution allowed us to simulate numerous configurations of controlled flow-shop systems. The impact of the controller on performances of the studied systems is shown by the analysis of the simulation results. Its influence varies according to the dispatching rule used to select the request message to process all the time. Then, we establish a control hound which shows that, in certain cases, the central controller becomes the critical resource of the production system and thus constitutes the bottleneck. After a study of the atteignability conditions of the optimal production rate, we formulate propositions for an efficient on-line scheduling of the controller activity from dispatching rules based on the EDF and LLF algorithms and what we respectively name EoDF and LoLF
Achour, Zied. "Contribution à la synthèse des contrôleurs des systèmes à événements discrets partiellement observables". Metz, 2005. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2005/Achour.Zied.SMZ0503.pdf.
Pełny tekst źródłaIn this work, we present control synthesis approaches for discrete events systems with partial observation. According to the used model, we propose two types of contributions. A first contribution is an extension of the supervisory control based on the Petri net (PN) models and the theory regions by integrating the observation constraint of the events. The second interesting contribution relates to the development of a formal method of control synthesis starting from a Grafcet control plant while being based on a new interpretation of the theory of regions. For the plant modelled with Petri nets, we propose two approaches of control synthesis. These approaches solve the forbidden states problem characterised by a set of General Mutual Exclusion Constraints (GMEC) by exploiting the structural properties of the marked graphs. Structural properties are proposed to perform the worst-case analysis for each GMEC specification with any given initial marking when uncontrollable and/or unobservable transitions are allowed. Efficient solutions are proposed for the determination of the maximal uncontrollably reachable marking of any critical place. Second approach resolves the forbidden state-transition problems (FSTP). The developed synthesis approach integrates the concept of liveness with uncontrollable / unobservable transitions. The suggested approach determines the maximum permissive PN controller, when it exists. The necessary conditions for the existence of the PN controller for the partially observable DES are established. The second contribution of this work relates to the use of the theory of regions to synthesis a supervisor from a Grafcet control plant model for forbidden state specifications and integrating the reversibility aspect of the plant. For this, a new interpretation of the theory of regions was developed to formally determine a set of control variables to integrate into the initial Grafcet control model which constitutes the supervisor
Albaradeyia, Issa. "Modélisation de l'érosion en zone montagneuse semi-aride". Lille 1, 2007. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2007/50376-2007-Albaradeyia.pdf.
Pełny tekst źródłaGuenounou, Ouabib. "Méthodologie de conception de contrôleurs intelligents par l'approche génétique. Application à un bioprocédé". Phd thesis, Université Paul Sabatier - Toulouse III, 2009. http://tel.archives-ouvertes.fr/tel-00392473.
Pełny tekst źródłaLucas, Pierre-Yves. "Modélisations, Simulations, Synthèses pour des réseaux dynamiques de capteurs sans fil". Thesis, Brest, 2016. http://www.theses.fr/2016BRES0114/document.
Pełny tekst źródłaThe integration of environment and information systems is progressing quickly since 10 years. This allows to monitor natural, physical or societal evolutions; to capture their logic and sometimes to control their effects. This integration is feasible thanks to many technical and scientific progresses: sensors, wireless communications, system on chips, batteries, distributed systems and geo-localization. The benefits are important for climate change monitoring and resource savings.In this context, we have firstly achieved a learning of technologies and several practical system realizations. We have produced a navigation software (QuickMap) allowing to interface gis databases and tile servers similar to OpenStreetMap, taking care of sensor locations and outputs. QuickMap is also a nice frontend to produce cellular systems oriented to physical simulations.Using the NetGen platform, we have produced a simulation framework allowing to schedule mobile moves with sensor field activities. A case study was leo satellites visiting remote sensor systems, with investigations on two algorithms suitable for data collection and control.Finally we have addressed the question of observation system virtualization by using an high level, process oriented virtual machine (tvm) to control the wireless link, a step forward to make the distributed and local behaviours homogeneous in terms of programming and simulation.Many of our developments are currently involved in active projects.This thesis was funded by a grant of Brest Metropole Oceane (BMO) and was achieved in a wireless research group at University of Brest, Lab-STICC laboratory
Wang, Peng. "Active vibration control in a specific zone of smart structures". Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEC007/document.
Pełny tekst źródłaThis research aims at solving a particular vibration control problem of smart structures. We aim at reducing the vibration in a specific zone of the smart structure under the disturbance that covers a wide frequency band. Moreover, at this specific zone, neither actuation nor sensing is possible.Here we face several main challenges. First, we need to control the vibration of a specific zone of the structure while we only have access to measurements at other zones. Second, the wide bandwidth of the disturbance implies that numerous modes should be controlled at the same time which requires the use of multiple actuators and sensors. This leads to a MIMO controller which is difficult to obtain using classical controller design methods. Third, the so-called spillover problem must be avoided which is to guarantee the closed-loop stability when the model-based controller is applied on the actual setup. To tackle these challenges, we investigate two control strategies: the centralized control and the distributed control.For centralized control, we propose a methodology that allows us to obtain a simple MIMO controller that accomplishes these challenges. First, several modeling and identification techniques are applied to obtain an accurate low-order model of the smart structure. Then, an H_∞ control based synthesis method with a particularly proposed H_∞ criterion is applied. This H_∞ criterion integrates multiple control objectives, including the main challenges. In particular, the spillover problem is transformed into a robust stability problem and will be guaranteed using this criterion. The obtained H_∞ controller is a standard solution of the H_∞ problem. The final controller is obtained by further simplifying this H_∞ controller without losing the closed-loop stability and degrading the performance. This methodology is validated on a beam structure with piezoelectric transducers and the central zone is where the vibration should be reduced. The effectiveness of the obtained controller is validated by simulations and experiments.For distributed control, we consider the same beam structure and the same control objectives. There exist methods aiming at designing distributed controllers of spatially interconnected system. This research proposes a FEM based method, combined with several model reduction techniques, that allows to spatially discretize the beam structure and deduce the state-space models of interconnected subsystems. The design of distributed controllers will not be tackled in this research
Nasri, Ridha. "Paramétrage Dynamique et Optimisation Automatique des Réseaux Mobiles 3G et 3G+". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2009. http://tel.archives-ouvertes.fr/tel-00494190.
Pełny tekst źródłaDarnaude, Audrey. "Apports fluviaux en zone côtière et réseaux trophiques marins benthiques : Transfert de matière organique particulaire terrigène jusqu'aux poissons plats au large du Rh^one". Aix-Marseille 2, 2003. http://www.theses.fr/2003AIX22025.
Pełny tekst źródłaBerviller, Yves. "Détection d'éléments en approche dans une zone mobile par vision artificielle et applications". Nancy 1, 1998. http://www.theses.fr/1998NAN10001.
Pełny tekst źródłaQuincey, Sylvio. "La supervision bancaire dans l'Union Européenne : essai de contribution pour une zone de supervision optimale". Thesis, Lyon 3, 2015. http://www.theses.fr/2015LYO30063.
Pełny tekst źródłaFor the supervisor, an historical approach of banks allows to better assimilate its ways of functioning. She also serves to better understand why her actors, always endowed of the confidence to develop business, sometimes, show an over-optimism leading to their ruin. The mobilization of the law guides the action of the banking control. The 2007-2008 crisis has provoked awareness in Europe: the impossibility for every member state of the Union to exercise individually an effective supervision without a total harmonization. So was born the construction of the MSU. Located in Frankfurt, the “supervision unique” has been working since November 4th, 2014. But the road map assigned to the supervision a new and more diversifiable field. For sure, the MSU is skilled enough, but is there a will to change the European Union into a “zone de supervision optimale”?
Hillah, Lom Messan. "Intégration des méthodes formelles au développement dirigé par les modèles, pour la conception et la vérification des systèmes et applications répartis". Paris 6, 2009. http://www.theses.fr/2009PA066267.
Pełny tekst źródłaBoumezzough, Ali. "Contribution à la connaissance des invertébrés ripicoles épigés et endogés en zone méditerranéenne : étude des peuplements ripicoles de deux réseaux hydrographiques du Haut-Atlas marocain". Aix-Marseille 3, 1988. http://www.theses.fr/1988AIX30021.
Pełny tekst źródłaRachedi, Abderrezak. "Contributions à la sécurité dans les réseaux mobiles ad Hoc". Phd thesis, Université d'Avignon, 2008. http://tel.archives-ouvertes.fr/tel-00683602.
Pełny tekst źródłaArguence, Olivier. "Modélisation des ilots non-intentionnels et caractérisation des méthodes passives de détection d’ilotage". Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAT045/document.
Pełny tekst źródłaUnintentional islands might appear when a subpart of the grid is disconnected from the power system and keeps working because of local generation. These events are unwanted: their behavior is not controlled and leads to potential risks for people and for electric equipment. Unintentional islanding is a complex phenomenon and badly understood. Nowadays it is considered to be rare, but a priori its occurrence probability is currently steadily increasing. This rising is the consequence of several phenomena: firstly, the development of distributed generation of small and average size directly connected to the distribution grid; secondly, the enlargement of frequency thresholds used by isolating protections; and thirdly, the implementation of power regulations of active and reactive power in the generation unit. Within this context, the Smart Grid chair of Enedis financed this PhD thesis in order to better characterize these islanding phenomena and to improve their detection.To achieve these targets, a first priority of the PhD was to improve the comprehension of unintentional islanding through symbolic calculation. This approach makes it possible to solve a simple model and to explain the evolution of the frequency during an island. These results are completed with several laboratory experiments and by numeric simulations. Models are designed based on a thorough bibliography, in particular for load modeling.A second priority of the PhD was to estimate the efficiency of anti-islanding protections through the computation of non-detection zone (NDZ). The impact of several loads on the NDZ is analyzed to improve the understanding of unintentional islanding, which is a complex phenomenon. The efficiency of new anti-islanding protections using thresholds on the rate of change of frequency (ROCOF) is also thoroughly evaluated. It is shown that the computation method used by the protection plays a key role. At last, the calculation methods of the NDZ is improved regarding previous methods. Among other things, it allows to radically change the estimations of the impact of new power regulations P(f) and Q(U)
Bou-Rouphaël, Johnny. "A new role for Barhl1 in a cerebellar germinative zone as inhibitor of T-cell factors transcriptional activity". Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS009.
Pełny tekst źródłaThe human cerebellum hosts more than 50% of all brain neurons. Cerebellar granule neurons are the smallest and most abundant neurons. atonal homologue 1 (Atoh1)-expressing granule neuron progenitors (GNPs) emerge from the upper rhombic lip (URL), a germinative zone located in the cerebellar primordium and displaying features of a niche of neural stem cells. GNPs proliferate, migrate, and differentiate to settle into the internal granule layer. These processes are tightly regulated by a number of transcription factors and signaling pathways. T-Cell Factor/Lymphoid Enhancer-binding Factor (Tcf/Lef) are transcriptional effectors acting downstream of Wnt/β-catenin signaling. Although Tcf is transcriptionally active in the URL, neither its function(s) nor its developmental regulator(s) have been addressed in this area. The transcription factor BarH-like 1 (Barhl1) is expressed in committed GNPs located in areas devoid of Tcf transcriptional activity. The aims of this thesis were to investigate the functions of Tcf and of Barhl1 as regulators of GNPs development using amphibian as experimental model. The data presented in this work encompass a thorough analysis of the spatial and temporal expressions of key markers involved in GNP development in amphibian, and an investigation of Barhl1 and Tcf functions in this developmental process. Our gain and loss of function experiments, together with the transcriptomic analysis of Barhl1 depletion in the rhombomere 1 validate a key role for Tcf as a transcriptional activator of atoh1 and as an inducer of the URL territory, and for Barhl1 as a developmental inhibitor of Tcf activity allowing GNPs to exit the URL. We identified key genes inhibited by Barhl1 and involved in the maintenance of URL germinative zone
Masclaux, Hélène. "Diversité des interactions trophiques à l'interface microorganismes - microcrustacés dans une zone littorale à macrophytes : conséquences sur le transfert des acides gras essentiels". Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2011. http://tel.archives-ouvertes.fr/tel-00673430.
Pełny tekst źródłaPascal, Pierre-Yves. "Devenir des bactéries dans les réseaux trophiques des vasières intertidales : le cas de Brouage (Baie de Marennes-Oléron)". Phd thesis, Université de La Rochelle, 2008. http://tel.archives-ouvertes.fr/tel-00293510.
Pełny tekst źródłaBernier, Mahana. "solutions smart grid innovantes pour l’intégration massive de la production photovoltaïque au réseau public de distribution en zone rurale". Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAT036.
Pełny tekst źródłaDistribution grids are evolving and facing new challenges, including the massive insertion of distributed energy resources and the modification of consumer uses. These paradigm shifts are creating new constraints that affect the design and operation of electricity grids, as well as the planning and interconnection studies. We are now moving towards more instrumented and intelligent networks called Smart Grids. In the SMAP project in particular, we compare solutions to improve the massive insertion of photovoltaic production in rural low voltage distribution networks.In this context, we develop models and algorithms to integrate different uncertainties over the next 35 years into distribution network planning methods. Four alternative solutions compared to conventional reinforcement solutions are also modeled: two types of local control of PV inverters, the active power limitation of the PV inverters and an MV/LV transformer equipped with an on load tap changer. We define different indicators in order to evaluate the performance of the solutions in terms of costs and efficiency. The developments carried out are validated on two geographical perimeters, which makes it possible to draw first conclusions that will have to be validated on other perimeters. One of the important results of the thesis is in particular the significant gain of the solutions based on local voltage control of the inverter compared to the use of an on load tap changer. The many algorithms have been developed with PowerFactory so that they can be reused and completed by Enedis
Alvarado, Ruiz Mario Alberto. "Conception, dimensionnement et évaluation de performance d'un réseau innovant pour la recharge des véhicules électriques en zone urbaine". Electronic Thesis or Diss., Paris, ENST, 2015. http://www.theses.fr/2015ENST0057.
Pełny tekst źródłaIn order to reduce the impact of global warming, the European Commission has decided in the continuation of the Kyoto protocol to reduce drastically greenhouse gas emissions. In this matter, the progressive replacement of thermal vehicles by electric ones is considered as a key objective. For that purpose, several prerequisites must be considered for the rapid deployment of Electrical Vehicles (EV) in the European market. The first of these prerequisites consists in the design of a new generation of batteries with higher energy efficiency, larger capacity and improved robustness. The second one is the design and rapid deployment of cost effective charging infrastructures. At last, the emergence of European standards in all these matters is an imperious necessity for the viability of the EVs European market. This thesis is mainly focused on the second of these three prerequisites. It is widely admitted that in the short term, EVs usage will be essentially limited to urban areas before being extended to the whole territory. As it is considered by the French National TELEWATT research project to which we have contributed, street lighting networks can be used judiciously to deploy in the short term low cost charging infrastructures. The basic principle of this project consists in coupling to each street light one or two EV's charging stations if one or two parking spots are located nearby. Various electrical constraints specified in the TELEWATT project must be satisfied to enable EVs' charging without degrading the quality of the lighting system. In this thesis, we begin to demonstrate the feasibility of such an operation. For that purpose, we have developed a simulator enablingto depict the dynamic behavior of the global system. The strength and originality of this simulator resides in its capacity to determine in real-time and with the necessary precision if an EV can effectively be connected to a charging station. The response to this question depends on static and dynamic characteristics of the street lighting network and on the state of charge of the batteries of both the connected and candidate EVs. The dynamism of the charging process of each EV strongly depends on the instantaneous power consumed by the global infrastructure. The second original result of this thesis consists in the design of scheduling policies to activate the various charging stations. Our objective is to propose via these scheduling policies, various types of guaranteed Quality of Service (QoS) to the end-users. Such guarantees can be declined for instance in terms of expected state of charge for a given parking term
Cotte, Nathalie. "Détermination des variations latérales de la lithosphère par l'analyse des ondes de surface enregistrées par des réseaux régionaux". Phd thesis, Grenoble 1, 2000. http://tel.archives-ouvertes.fr/tel-00703264.
Pełny tekst źródłaBlanc, Julien. "Du côté du musée de l'Homme : Les débuts de la Résistance en zone occupée (été 1940 - été 1941)". Lyon 2, 2008. http://theses.univ-lyon2.fr/documents/lyon2/2008/blanc_j.
Pełny tekst źródłaStarting in the summer of 1940, in a country profoundly disheartened by the shock of its military collapse, the first manifestations of opposition to the Nazi occupation began to appear. In the capital city, near the “musée de l’Homme”, scattered and small-scale initiatives were undertaken. These gradually coalesced into a loose network composed of diverse groups. Geographically dispersed, its members markedly heterogeneous in their social and ideological backrounds, this initial Resistance movement quickly became the specific focus of ferocious Nazi repression: its most well-known leaders Boris Vilde and Anatole Lewitsky were condemned to death in February 1942 and executed. How was this initial Resistance movement organized? What was its internal structure? What precisely were its objectives? What was the backround of its leaders? Did the Nazi repression succeed in completely obliterating all its activities? What has been the legacy of this initial Resistance, as seen by historians from 1942 until the present day?
Simon-Labric, Thibaud. "Evolution du refroidissement, de l'exhumation et de la topographie des arcs magmatiques actifs : exemple des North Cascades (USA) et de zone de faille Motagua (Guatemala)". Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00591413.
Pełny tekst źródłaDideban, Abbas. "Synthèse de contrôleurs discrets par simplification de contraintes et de conditions". Phd thesis, Grenoble 1, 2007. http://www.theses.fr/2007GRE10055.
Pełny tekst źródłaIn this work, we propose a systematic method for controller synthesis in discrete events systems. We model the process and the specification by safe Petri Nets (PN). Two distinct ideas are used: 1) adding the control places to prevent the reachability of forbidden states, and 2) adding conditions with the controllable transitions. The uncontrollability asks the problem of optimatlity and the large number of control places the problem of complexity. In the first idea, we use the theorem introduced by Guia, which makes it possible to pass from the set of forbidden states to the set of linear constraints. We propose original methods of simplification of the constraints. It is then possible to reduce the number and the bound of the constraints and thus to build a simple controller model. The methods of simplification presented are applicable on safe PN. We determine the necessary and sufficient conditions to have a maximal permissive controller. The principal advantage of these methods is that the controlled PN model is very close to the PN initial model. The second idea for controller synthesis is the using of conditions for controllable transitions. The methods which use this technique generally need a long calculation in real time. While applying our method of simplification, we arrive to a simple controller
Dideban, Abbas. "Synthèse de contrôleurs discrets par simplification de contraintes et de conditions". Phd thesis, Université Joseph Fourier (Grenoble), 2007. http://tel.archives-ouvertes.fr/tel-00152553.
Pełny tekst źródłaDans la première idée, nous avons utilisé le théorème introduit par Guia, qui permet de passer d'un ensemble d'états interdits vers un ensemble de contraintes linéaires. Nous avons proposé des méthodes originales de simplification des contraintes. Il est alors possible de réduire le nombre et la borne des contraintes et ainsi de construire un modèle contrôlé simple. Les méthodes de simplification présentées sont applicables sur les RdP saufs. Nous avons déterminé les conditions nécessaires et suffisantes pour avoir un contrôleur maximal permissif. L'avantage principal de ces méthodes de synthèse de contrôleurs est que le modèle RdP contrôlé est très proche du modèle initial.
La deuxième idée qui a été utilisée pour la synthèse est l'utilisation des conditions pour le franchissement des transitions contrôlables. Les méthodes qui utilisent cette technique, ont en général besoin d'un calcul long en temps réel. En appliquant notre méthode de simplification, nous arrivons à un contrôleur simple.
Cadoret, Anne. "Conflits d'usage liés à l'environnement et réseaux sociaux : Enjeux d'une gestion intégrée? Le cas du littoral du Languedoc-Roussillon". Phd thesis, Université Paul Valéry - Montpellier III, 2006. http://tel.archives-ouvertes.fr/tel-00176681.
Pełny tekst źródłaOn observe que des configurations spatiales récurrentes apparaissent quant à la localisation des conflits d'usage. Cependant, le mode d'expression et les formes de régulation diffèrent selon les types de territoires (lagunes, zones périurbaines, départements, communes, etc.) et les types de conflits (urbanisation et aménagements, protection des espaces et des espèces et gestion de l'eau et des déchets).
L'analyse des conditions d'émergence, des modes d'expression et des formes de régulation à une échelle locale révèle les interactions fortes entre les réseaux d'acteurs et les mutations spatiales. L'apparition d'un conflit bouleverse les pratiques et les représentations socio-spatiales. Les territorialités se redessinent et participent d'une part à la restructuration des réseaux d'acteurs, et d'autre part à l'évolution des stratégies et des comportements des acteurs qui influencent en retour l'organisation du territoire.
Fu, Li. "Rhéologie des polymères dans les contacts confinés : tribologie des interfaces étudiées par un nouveau dispositif couplant FRAPP et nanotribologie". Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAE030/document.
Pełny tekst źródłaThis work deals with the development of a new experimental technique and its application to study the rheology of a highly confined and sheared interfacial zone involved in the sliding of a rigid tip on a polymer suface. This tribological work has been conducted gradually from the mesoscopic scale to the nanoscale.To highlight the behavior of the cohesive zone, we studied an interpenetrating polymer network system (INPs) CR39-PMMA. Thanks to their adjustable properties, we may use the INPs as a substrate to study the interfacial zone by easily varying the rheological parameters.To study the rheological properties in the interfacial zone, the phospholipid layers of DSPC have been chosen as model material. The structures have been studied by the neutron reflectivity experiments. We show that the structure of supported layers of DSPC is robust, and the relative humidity plays a key role on it. Sliding tests on the DSPC layers reveals the influences of mechanical and environmental parameters on the shear stress. The development of NanoTribo-FRAPP allows to characterize the shear conditions of DSPC layers, with the measurements of local velocity of these of nanoscale molecular layers. This gives us access to estimate the slip planes as a function of imposed velocity
Hammal, Mohamed Ali. "Contribution à la découverte de sous-groupes corrélés : Application à l’analyse des systèmes territoriaux et des réseaux alimentaires". Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI024.
Pełny tekst źródłaBetter feeding cities in quantity and quality, especially large cities, is a major challenge, whose resolution requires a better understanding of the relationships between urban populations and their food. On the scale of urban food systems, we need to understand the availability of food resources crossed with the socio-economic profiles of the territories. But we lack tools and methods to systematically understand the relationships between consumption basins, supply and eating habits. The objective of this thesis is to contribute to the development of new IT tools to process temporal, heterogeneous and multi-sources data in order to identify and characterize behaviors specific to a geographic area. For this, we rely on the joint exploration of gradual patterns, to discover rank correlations, and subgroups in order to find contexts for which the correlations described by the gradual patterns are exceptionally strong compared to the remaining of the data. We propose an enumeration algorithm based on pruning properties with upper bounds, as well as another algorithm which samples the patterns according to the quality measure. These approaches are validated not only on benchmark datasets, but also through an empirical study of the formation of food deserts in the Lyon urban area
Alvarado, Ruiz Mario Alberto. "Conception, dimensionnement et évaluation de performance d'un réseau innovant pour la recharge des véhicules électriques en zone urbaine". Thesis, Paris, ENST, 2015. http://www.theses.fr/2015ENST0057/document.
Pełny tekst źródłaIn order to reduce the impact of global warming, the European Commission has decided in the continuation of the Kyoto protocol to reduce drastically greenhouse gas emissions. In this matter, the progressive replacement of thermal vehicles by electric ones is considered as a key objective. For that purpose, several prerequisites must be considered for the rapid deployment of Electrical Vehicles (EV) in the European market. The first of these prerequisites consists in the design of a new generation of batteries with higher energy efficiency, larger capacity and improved robustness. The second one is the design and rapid deployment of cost effective charging infrastructures. At last, the emergence of European standards in all these matters is an imperious necessity for the viability of the EVs European market. This thesis is mainly focused on the second of these three prerequisites. It is widely admitted that in the short term, EVs usage will be essentially limited to urban areas before being extended to the whole territory. As it is considered by the French National TELEWATT research project to which we have contributed, street lighting networks can be used judiciously to deploy in the short term low cost charging infrastructures. The basic principle of this project consists in coupling to each street light one or two EV's charging stations if one or two parking spots are located nearby. Various electrical constraints specified in the TELEWATT project must be satisfied to enable EVs' charging without degrading the quality of the lighting system. In this thesis, we begin to demonstrate the feasibility of such an operation. For that purpose, we have developed a simulator enablingto depict the dynamic behavior of the global system. The strength and originality of this simulator resides in its capacity to determine in real-time and with the necessary precision if an EV can effectively be connected to a charging station. The response to this question depends on static and dynamic characteristics of the street lighting network and on the state of charge of the batteries of both the connected and candidate EVs. The dynamism of the charging process of each EV strongly depends on the instantaneous power consumed by the global infrastructure. The second original result of this thesis consists in the design of scheduling policies to activate the various charging stations. Our objective is to propose via these scheduling policies, various types of guaranteed Quality of Service (QoS) to the end-users. Such guarantees can be declined for instance in terms of expected state of charge for a given parking term
Almahallawi, Khamis. "Modelling interaction of land use, urbanization and hydrological factors for the analysis of groundwater quality in mediterranean zone (example the Gaza Strip, Palestine)". Lille 1, 2005. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2005/50376-2005-Almahallawi.pdf.
Pełny tekst źródłaPour simuler la pollution des eaux souterraines par les nitrates dans des zones agricoles, le meilleur réseau utilisé est le Multilayer perceptron (MLP) avec six variables d'entrée et quatre couches cachées. Le meilleur réseau pour simuler les nitrates des eaux souterraines en milieu urbain est le modèle MPL. L'étude a prouvé que le modèle RNA peut être employé comme outil de gestion pour la prévision de la qualité agricole et urbaine des eaux souterraines pour aider les planificateurs du secteur de l'eau. En outre, tous les aquifères côtiers sont typiques dans le monde entier et cette approche de modélisation des eaux souterraines peut être appliquée à d'autres aquifères côtiers à une échelle régionale ou internationale. Puisque l'agriculture et l'élevage intensif produisent des risques de pollution d'azote, la gestion de la fertilisation est ici essentielle pour arrêter la dégradation de la qualité des eaux souterraines. L'augmentation du l'équipement des réseaux d'égouts et des eaux résiduaires avec des techniques appropriées de traitement est un facteur principal important pour abaisser la pollution des nitrates dues à l'activité urbaine
Schmidt, Robert. "Slicing in heterogeneous software-defined radio access networks". Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS525.
Pełny tekst źródła5G networks are envisioned to be a paradigm shift towards service-oriented networks. In this thesis, we investigate how to efficiently combine slicing and SD-RAN to provide the required level of flexibility and programmability in the RAN infrastructure to realize service-oriented multi-tenant networks. First, we devise an abstraction of a base station to represent logical base stations and describe a virtualized network service. Second, we propose a novel standard-compliant SD-RAN platform, named FlexRIC, in the form of a software development kit (SDK). Third, we provide a modular design for a slice-aware MAC scheduling framework to efficiently manage and control the radio resources in a multi-service environment with quality-of-service (QoS) support. Finally, we present a dynamic SD-RAN virtualization layer based on the FlexRIC SDK and MAC scheduling framework to flexibly compose a multi-service SD-RAN infrastructure and provide programmability for multiple SD-RAN controllers
Diaz, Nava Mario. "Proposition d'une méthodologie de conception de circuits intégrés de communication : réalisation d'un communicateur pour le réseau local FIP". Phd thesis, Grenoble INPG, 1986. http://tel.archives-ouvertes.fr/tel-00320454.
Pełny tekst źródłaZheng, Tian. "Analyse de Fiabilité et de performance d'un Système de Véhicules Intelligents". Phd thesis, Ecole Centrale de Lille, 2013. http://tel.archives-ouvertes.fr/tel-00866223.
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