Dissertations / Theses on the topic 'Intelligence artificielle distribuée et systèmes multi-Agents'
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Gandon, Fabien. "INTELLIGENCE ARTIFICIELLE DISTRIBUÉE ET GESTION DES CONNAISSANCES : ONTOLOGIES ET SYSTÈMES MULTI-AGENTS POUR UN WEB SÉMANTIQUE ORGANISATIONNEL." Phd thesis, Université de Nice Sophia-Antipolis, 2002. http://tel.archives-ouvertes.fr/tel-00378201.
Full textsur une ontologie. Dans le projet CoMMA, je me suis focalisé sur deux scénarios d'application:
l'assistance aux activités de veille technologique et l'aide à l'insertion d'un nouvel employé dans une organisation. Trois aspects ont été développés dans ce travail :
- la conception d'une architecture multi-agents assistant les deux scénarios, et l'approche organisationnelle descendante adoptée pour identifier les sociétés, les rôles et les interactions des agents ;
- la construction de l'ontologie O'CoMMA et la structuration de la mémoire organisationnelle en exploitant les technologies du Web sémantique ;
- la conception et l'implantation (a) des sous-sociétés d'agents chargées de la maintenance des annotations et de l'ontologie et (b) des protocoles supportant ces deux groupes d'agents, en particulier des techniques pour la distribution des annotations et des requêtes entre les agents.
Sabouret, Nicolas. "Interactions sur le fonctionnement dans les systèmes multi-agents ouverts et hétérogènes." Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2009. http://tel.archives-ouvertes.fr/tel-00464188.
Full textElimadi, Manal. "Modélisation et la simulation à base d'agents : Affectation dynamique des véhicules autonomes et connectés." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2023. http://www.theses.fr/2023UBFCA028.
Full textThe problem of traffic assignment consists of determining the routes taken by users of a transportation infrastructure. This problem has been the subject of numerous studies, particularly in the context of analyzing scenarios for the development of road infrastructure and pricing strategies. Its formulation is primarily based on the principle of Wardrop equilibrium, where routes are defined in such a way that users have no incentive to change their paths. In the absence of pricing policies, this equilibrium ensures fairness in travel times between each origin-destination pair. However, it results in a social cost because fairness does not necessarily allow for optimal use of the network.The evolution of intelligent transportation systems, as well as the emergence of connected and autonomous vehicles, present new challenges to current approaches for solving the traffic assignment problem. These approaches rely on several simulation iterations to estimate travel times and adjust vehicle routes following gradient descent. However, these methods have two major limitations. Firstly, they do not enable real-time generation of balanced routes. Secondly, they do not take into account the ability of connected and autonomous vehicles to acquire precise information about traffic conditions. The work of this thesis aims to address these two limitations of current approaches. The goal is to define the interactions between various intelligent transportation systems, capable of leveraging relevant information to generate real-time routes that are both equitable and efficient. To achieve this objective, the thesis uses agent-based traffic modeling and simulation.The initial multi-agent systems proposed in this thesis draw inspiration from various traffic assignment assumptions in the literature. However, the results obtained revealed some shortcomings. Simulations show that the precise knowledge of travel times primarily depends on managing conflicts at network nodes. As a result, this thesis proposes a new approach based on multi-agent reservation of intersections. This approach dynamically assigns itineraries for autonomous and connected vehicles. The results show that it is possible to compute fair routes in real-time while significantly improving traffic efficiency
Ramos, Milton. "Structuration et évolution conceptuelles d'un agent assistant personnel dans les domaines techniques." Compiègne, 2000. http://www.theses.fr/2000COMP1302.
Full textThe concept of assistance, in fast, is always present in back-plane during all the history of computer sciences. We cannot dissociate the development in computers systems from the assistance to a user, in order to help him to achieve a specific task. In the Artificial Intelligence (AI), we can see the research and the development of the expert systems the attempt to build intelligent assistants, In our research we propose a model of a cognitive agent centred on the concept of assistance, i. E. The assistant agent is specialized in helping its Master (the user), Ms interests and preferences. Consequently, it is not up to a personal assistant agent to carry out itself the tasks required by its Master, but to "who" can do them and to engage and coordinate these other agents specialized in the tasks (service-agents). This assistant agent was built from the generic model of agent proposed in OMAS platform, and we identify the principal contributions: the : free-style protocol, from witch the agent sending a message can formulate its requests in a free language, the receiving agent of the message which has the responsibility to understand it, and the mechanism of conversation between the Master and the assistant integrated into the ontological mechanism. The OMAS-WA - " Open Multi-Agent Systems with Assistants platform is the specialization of OMAS platform for a special type of agent: the personal assist agent. The implementation of this specialization on the OMAS generis model of agent constitutes the experimental side of our research
Tlig, Mohamed. "Coordination locale et optimisation distribuée du trafic de véhicules autonomes dans un réseau routier." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0049/document.
Full textIn this thesis, we focus on traffic coordination and optimization in road intersections, while accounting for intelligent autonomous vehicles. This thesis is organized in two parts. The first part focuses on the problem of sharing a one-lane road between two opposite flows of vehicles. The state of the art shows few studies addressing this issue. We propose two reactive coordination approaches that minimize vehicle delays and measure their performances statistically through simulations. The second part of the thesis addresses the problem of generic traffic management in a traffic network. We develop a stop-free approach that explores a principle alternating vehicles between flows at intersections, and it provides distributed algorithms optimizing this alternation at each intersection and in the overall network. We present the modeling choices, the algorithms and the simulation study of our approach and we compare its performances with existing approaches
Tlig, Mohamed. "Coordination locale et optimisation distribuée du trafic de véhicules autonomes dans un réseau routier." Electronic Thesis or Diss., Université de Lorraine, 2015. http://www.theses.fr/2015LORR0049.
Full textIn this thesis, we focus on traffic coordination and optimization in road intersections, while accounting for intelligent autonomous vehicles. This thesis is organized in two parts. The first part focuses on the problem of sharing a one-lane road between two opposite flows of vehicles. The state of the art shows few studies addressing this issue. We propose two reactive coordination approaches that minimize vehicle delays and measure their performances statistically through simulations. The second part of the thesis addresses the problem of generic traffic management in a traffic network. We develop a stop-free approach that explores a principle alternating vehicles between flows at intersections, and it provides distributed algorithms optimizing this alternation at each intersection and in the overall network. We present the modeling choices, the algorithms and the simulation study of our approach and we compare its performances with existing approaches
Vercouter, Laurent. "Conception et mise en oeuvre de systèmes multi-agents ouverts et distribués." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2000. http://tel.archives-ouvertes.fr/tel-00839604.
Full textGutknecht, Olivier. "Proposition d'un modèle organisationnel générique de systèmes multi-agents et examen de ses conséquences formelles, implémentatoires et méthologiques." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2001. http://tel.archives-ouvertes.fr/tel-00008737.
Full textFerrand, Nils. "Modèles Multi-Agents pour l'Aide à la Décision et la Négociation en Aménagement du Territoire." Phd thesis, Université Joseph Fourier (Grenoble), 1997. http://tel.archives-ouvertes.fr/tel-00003562.
Full textStratulat, Tiberiu. "Systèmes d'agents normatifs : concepts et outils logiques." Phd thesis, Université de Caen, 2002. http://tel.archives-ouvertes.fr/tel-00005215.
Full textBou, saleh Bilal. "Approche Intelligence Artificielle Distribuée pour une planification réactive et une aide à la conduite du processus de blocs opératoires hospitaliers." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCA028.
Full textThe operating theater is one of the most important sector of a hospital. Optimizing its process is a priority for hospital managers. The abundant literature on the subject is unanimous on the fact that planning and sequencing interventions, satisfying a great multitude of requirements and constraints makes the construction of the operational program a very complex task. In addition, the construction of the program is far from enough, it is imperative to maintain automatic in "Near Real Time" the schedule according to the events appearing during the downstream phase of realization.The objective of this thesis is to provide a methodology for the management of the operating room process, integrating on the one hand a decision support to optimize the predictive planning and on the other hand to allow a dynamic replanning to guarantee a reactivity of the process of this medical sector.Our study began with a state of the art on the issues of operating theater management and proposed solutions, with an initial goal: to target the improvement approach to engage. We have noticed that the complexity and the heaviness of the existing models often based on the operational research and especially the combinatorial explosion of the constraints makes it impossible to find the optimum for realistic sizes of instances. This led us to decide that our study would break with the traditional strategy of continuous improvement. We favored an IAD approach aimed at finding solutions according to a programmed logic rather than the calculated resolutions of traditional approaches. Subsequently, we modeled the actors in the surgical intervention planning process using a multi-agent system.The proposed approach provides the most appropriate predictive planning of the operating theater activity. Each surgical procedure is planned individually considering the rules, all the constraints but also the surgeons' preferences. The same model allows in the downstream phase with a decision aid, the assignment of a surgical intervention facing an emergency situation. For a better performance coupled with an increased reactivity, we have also approached, with this model, the problem of dynamic adjustment of the schedules to balance the load in hours of surgery between the operating rooms.In the proposed methodology, decision support is based on the use of knowledge and the rules of know-how and their capitalization according to the principles of an expert system. In addition, we have proposed a set of automatic calculated performance and responsiveness indicators that are likely to be implemented in a future validation tool and that can be used as feedback to optimize the decision support process.Collaboration with a CHU in Lebanon provided data on scenarios of weekly surgeries. The results of some simulations highlight the convenience of the IAD approach in solving the problem
Hu, Wei. "Identification de paramètre basée sur l'optimisation de l'intelligence artificielle et le contrôle de suivi distribué des systèmes multi-agents d'ordre fractionnaire." Thesis, Ecole centrale de Lille, 2019. http://www.theses.fr/2019ECLI0008/document.
Full textThis thesis deals with the parameter identification from the viewpoint of optimization and distributed tracking control of fractional-order multi-agent systems (FOMASs) considering time delays, external disturbances, inherent nonlinearity, parameters uncertainties, and heterogeneity under fixed undirected/directed communication topology. Several efficient controllers are designed to achieve the distributed tracking control of FOMASs successfully under different conditions. Several kinds of artificial intelligence optimization algorithms andtheir modified versions are applied to identify the unknown parameters of the FOMASs with high accuracy, fast convergence and strong robustness. It should be noted that this thesis provides a promising link between the artificial intelligence technique and distributed control
Piette, Ferdinand. "Intergiciel agent pour le déploiement et la configuration d'applications distribuées dans des environnements ambiants." Electronic Thesis or Diss., Paris 6, 2017. http://www.theses.fr/2017PA066058.
Full textResearch domains like Ambient Intelligence or Internet of Things came up in the early 2000’s with the technologic improvement and the ongoing miniaturization of electronic devices. These electronic and information devices are scattered in the user’s environment, can communicate and exchange data more and more easily to provide intelligent and non-intrusive services to the users. However, it is difficult to have generic implementations of these applications. These difficulties are due the the high heterogeneity and dynamicity of the ambient environments. Vertical integrations of connected devices (data exchanges from the devices to external servers) allow more interoperability but generate overloads of the communication channels and privacy concerns. To prevent these problems, horizontal approaches (connected devices communicate directly together through the hardware infrastructure) have to be encouraged. In this thesis work, we address the problem of the automatic deployment and configuration of distributed applications in these ambient environments. We propose mechanisms that allow, from a description of the environment, the selection and the configuraion of the hardware entities that will support the execution of applications. These mechanisms are encapsulated in a middleware based on the multi-agent paradigm. The different agents of the system cooperate in order to select the right hardware entities that respects the requirements and the constraints of the applications we want to deploy
Monceyron, Eric. "Sur les problèmes de conception intelligente en ingénierie : EXPORT, un exemple de système coopératif multi-experts." Compiègne, 1991. http://www.theses.fr/1991COMPD374.
Full textLahoud, Inaya. "Un système multi-agents pour la gestion des connaissances hétérogènes et distribuées." Phd thesis, Université de Technologie de Belfort-Montbeliard, 2013. http://tel.archives-ouvertes.fr/tel-00977758.
Full textPiette, Ferdinand. "Intergiciel agent pour le déploiement et la configuration d'applications distribuées dans des environnements ambiants." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066058/document.
Full textResearch domains like Ambient Intelligence or Internet of Things came up in the early 2000’s with the technologic improvement and the ongoing miniaturization of electronic devices. These electronic and information devices are scattered in the user’s environment, can communicate and exchange data more and more easily to provide intelligent and non-intrusive services to the users. However, it is difficult to have generic implementations of these applications. These difficulties are due the the high heterogeneity and dynamicity of the ambient environments. Vertical integrations of connected devices (data exchanges from the devices to external servers) allow more interoperability but generate overloads of the communication channels and privacy concerns. To prevent these problems, horizontal approaches (connected devices communicate directly together through the hardware infrastructure) have to be encouraged. In this thesis work, we address the problem of the automatic deployment and configuration of distributed applications in these ambient environments. We propose mechanisms that allow, from a description of the environment, the selection and the configuraion of the hardware entities that will support the execution of applications. These mechanisms are encapsulated in a middleware based on the multi-agent paradigm. The different agents of the system cooperate in order to select the right hardware entities that respects the requirements and the constraints of the applications we want to deploy
Creput, Jean-Charles. "Hybridation de métaheuristiques pour la résolution distribuée de problèmes d'optimisation spatialisés." Habilitation à diriger des recherches, Université de Bourgogne, 2008. http://tel.archives-ouvertes.fr/tel-00914963.
Full textRavi, Mondi. "Confiance et incertitude dans les environnements distribués : application à la gestion des donnéeset de la qualité des sources de données dans les systèmes M2M (Machine to Machine)." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAM090/document.
Full textTrust and uncertainty are two important aspects of many distributed systems. For example, multiple sources of information can be available for the same type of information. This poses the problem to select the best source that can produce the most certain information and to resolve incoherence amongst the available information. Managing trust and uncertainty together forms a complex problem and through this thesis we develop a solution to this. Trust and uncertainty have an intrinsic relationship. Trust is primarily related to sources of information while uncertainty is a characteristic of the information itself. In the absence of trust and uncertainty measures, a system generally suffers from problems like incoherence and uncertainty. To improve on this, we hypothesize that the sources with higher trust levels will produce more certain information than those with lower trust values. We then use the trust measures of the information sources to quantify uncertainty in the information and thereby infer high level conclusions with greater certainty.A general trend in the modern distributed systems is to embed reasoning capabilities in the end devices to make them smart and autonomous. We model these end devices as agents of a Multi Agent System. Major sources of beliefs for such agents are external information sources that can possess varying trust levels. Moreover, the incoming information and beliefs are associated with a degree of uncertainty. Hence, the agents face two-fold problems of managing trust on sources and presence of uncertainty in the information. We illustrate this with three application domains: (i) The intelligent community, (ii) Smart city garbage collection, and (iii) FIWARE : a European project about the Future Internet that motivated the research on this topic. Our solution to the problem involves modelling the devices (or entities) of these domains as intelligent agents that comprise a trust management module, an inference engine and a belief revision system. We show that this set of components can help agents to manage trust on the other sources and quantify uncertainty in the information and then use this to infer more certain high level conclusions. We finally assess our approach using simulated and real data pertaining to the different application domains
Ngo, Ha Nhi. "Apprentissage continu et prédiction coopérative basés sur les systèmes de multi-agents adaptatifs appliqués à la prévision de la dynamique du trafic." Electronic Thesis or Diss., Université de Toulouse (2023-....), 2024. http://www.theses.fr/2024TLSES043.
Full textLe développement rapide des technologies matérielles, logicielles et de communication des systèmes de transport ont apporté des opportunités prometteuses et aussi des défis importants pour la société humaine. Parallèlement à l'amélioration de la qualité des transports, l'augmentation du nombre de véhicules a entraîné de fréquents embouteillages, en particulier dans les grandes villes aux heures de pointe. Les embouteillages ont de nombreuses conséquences sur le coût économique, l'environnement, la santé mentale des conducteurs et la sécurité routière. Il est donc important de prévoir la dynamique du trafic et d'anticiper l'apparition des embouteillages, afin de prévenir et d'atténuer les situations de trafic perturbées, ainsi que les collisions dangereuses à la fin de la queue d'un embouteillage. De nos jours, les technologies innovatives des systèmes de transport intelligents ont apporté des ensembles de données diverses et à grande échelle sur le trafic qui sont continuellement collectées et transférées entre les dispositifs sous forme de flux de données en temps réel. Par conséquent, de nombreux services de systèmes de transport intelligents ont été développés basé sur l'analyse de données massives, y compris la prévision du trafic. Cependant, le trafic contient de nombreux facteurs variés et imprévisibles qui rendent la modélisation, l'analyse et l'apprentissage de l'évolution historique du trafic difficiles. Le système que nous proposons vise donc à remplir les cinq composantes suivantes d'un système de prévision du trafic : textbf{analyse temporelle, analyse spatiale, interprétabilité, analyse de flux et adaptabilité à plusieurs échelles de données} pour capturer les patterns historiques de trafic à partir des flux de données, fournir une explication explicite de la causalité entrée-sortie et permettre différentes applications avec divers scénarios. Pour atteindre les objectifs mentionnés, nous proposons un modèle d'agent basé sur le clustering dynamique et la théorie des systèmes multi-agents adaptatifs afin de fournir des mécanismes d'apprentissage continu et de prédiction coopérative. Le modèle d'agent proposé comprend deux processus interdépendants fonctionnant en parallèle : textbf{apprentissage local continu} et textbf{prédiction coopérative}. Le processus d'apprentissage vise à détecter, au niveau de l'agent, différents états représentatifs à partir des flux de données reçus. Basé sur le clustering dynamique, ce processus permet la mise à jour continue de la base de données d'apprentissage en s'adaptant aux nouvelles données. Simultanément, le processus de prédiction exploite la base de données apprise, dans le but d'estimer les futurs états potentiels pouvant être observés. Ce processus prend en compte l'analyse de la dépendance spatiale en intégrant la coopération entre les agents et leur voisinage. Les interactions entre les agents sont conçues sur la base de la théorie AMAS avec un ensemble de mécanismes d'auto-adaptation comprenant textbf{l'auto-organisation}, textbf{l'autocorrection} et textbf{l'auto-évolution}, permettant au système d'éviter les perturbations, de gérer la qualité de la prédiction et de prendre en compte les nouvelles informations apprises dans le calcul de la prédiction. Les expériences menées dans le contexte de la prévision de la dynamique du trafic évaluent le système sur des ensembles de données générées et réelles à différentes échelles et dans différents scénarios. Les résultats obtenus ont montré la meilleure performance de notre proposition par rapport aux méthodes existantes lorsque les données de trafic expriment de fortes variations. En outre, les mêmes conclusions retirées de différents cas d'étude renforcent la capacité du système à s'adapter à des applications multi-échelles
Boucher, Alain. "Une approche décentralisée et adaptative de la gestion d'informations en vision ; application à l'interprétation d'images de cellules en mouvement." Phd thesis, Université Joseph Fourier (Grenoble), 1999. http://tel.archives-ouvertes.fr/tel-00004805.
Full textMoukir, Sara. "High performance analysis for road traffic control." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASG039.
Full textThe need to reduce travel times and energy consumption in urban road networks is critical for improving collective well-being and environmental sustainability. Since the 1950s, traffic modeling has been a central research focus. With the rapid evolution of computing capabilities in the 21st century, sophisticated digital simulations have emerged, accurately depicting road traffic complexities. Mobility simulations are essential for assessing emerging technologies like cooperative systems and dynamic GPS navigation without disrupting real traffic.As transport systems become more complex with real-time information, simulation models must adapt. Multi-agent simulations, which analyze individual behaviors within a dynamic environment, are particularly suited for this task. These simulations help understand and manage urban traffic by representing interactions between travelers and their environment.Simulating large populations of travelers in cities, potentially millions of individuals, has historically been computationally demanding. Advanced computer technologies allowing distributed calculations across multiple computers have opened new possibilities. However, many urban mobility simulators do not fully exploit these distributed architectures, limiting their ability to model complex scenarios involving many travelers and extensive networks.The main objective of this research is to improve the algorithmic and computational performance of mobility simulators. We aim to develop and validate generic and reproducible distribution models that can be adopted by various multi-agent mobility simulators. This approach seeks to overcome technical barriers and provide a solid foundation for analyzing complex transport systems in dynamic urban environments.Our research leverages the MATSim traffic simulator due to its flexibility and open structure. MATSim is widely recognized in the literature for multi-agent traffic simulation, making it an ideal candidate to test our generic methods.Our first contribution applies the "Unite and Conquer" (UC) approach to MATSim. This method accelerates simulation speed by leveraging modern computing architectures. The multiMATSim approach involves replicating several MATSim instances across multiple computing nodes with periodic communications. Each instance runs on a separate node, utilizing MATSim's native multithreading capabilities to enhance parallelism. Periodic synchronization ensures data consistency, while fault tolerance mechanisms allow the simulation to continue smoothly even if some instances fail. This approach efficiently uses diverse computational resources based on each node's specific capabilities.The second contribution explores artificial intelligence techniques to expedite the simulation process. Specifically, we use deep neural networks to predict MATSim simulation outcomes. Initially implemented on a single node, this proof-of-concept approach efficiently uses available CPU resources. Neural networks are trained on data from previous simulations to predict key metrics like travel times and congestion levels. The outputs are compared to MATSim results to assess accuracy. This approach is designed to scale, with future plans for distributed neural network training across multiple nodes.In summary, our contributions provide new algorithmic variants and explore integrating high-performance computing and AI into multi-agent traffic simulators. We aim to demonstrate the impact of these models and technologies on traffic simulation, addressing the challenges and limitations of their implementation. Our work highlights the benefits of emerging architectures and new algorithmic concepts for enhancing the robustness and performance of traffic simulators, presenting promising results
Pluchinotta, Irene. "Multi-Agent Modelling for Distributed Intelligent Decision in Water Management." Thesis, Paris 9, 2015. http://www.theses.fr/2015PA090006.
Full textWater resource management can be a complex, uncertain and conflictual domain. It faces numerous problems in many regions of the world, such as the disparity of interests associated with the water resource, multiple decision makers, complex networks of administration, inoperative water distribution, various socio-political events and climate change. Consequently, environmental decision-making takes place in a highly interconnected system, in which neither the decisional ramifications nor the complexity of its impacts can be neglected. In the Apulia Region, water scarcity is the main rising problem and is affecting human and more-than-human communities.Water scarcity generates the need to enhance collaborative multi-agent decision-making processes. Researchers suggest that the “tragedy of commons” could be avoided when a shared resource is at stake, provided that communities interact and operate in a collective way and avoid, for example, the market rules constraints. This requires the development of dynamic decision-aiding tools. They should be capable to integrate the different problem frames held by the decision makers, to clarify the differences among those frames, to support the creation of a collaborative problem structuring process and to provide shared platforms and interaction spaces.In this regard, we built a dynamic interaction space (DIS), highlighting the operative criticalities and allowing the analysts to identify a shared problem definition. The emerging issues of gathering and exchanging knowledge and representing structured concepts can be solved through a combined approach. Multi-agent systems joined with system dynamics can provide unconventional alternatives that use physical and social components, with a particular focus on individual and collective behaviours in resource management with multiple decision makers.In our case study, the model was used as a platform for modelling multi-agent organizations, in order to support collective decision-making in water management. The model is capable of representing a distributed complex water management system, where simulated behaviours are based on field observations and on the participation of stakeholders. What is more, the multi–agent system approach enables the interaction and allows to formalize theIrene Pluchinotta – “Multi-Agent Modelling For Distributed Intelligent Decision In Water Management”iibehaviours of water users in the management process. A system dynamics modelling in an environment of interacting decision agents, allows us to explicitly consider the different frames and to simulate interactions when adopting a new policy. The model can showcase how the limited understanding of the interaction space affects the actions followed by each decision-makers and, finally, how it could lead to policy resistance mechanisms. In conclusion, the result is the richest possible picture of the existing problem situation that deals with irrigation water management in agricultural systems
Carron, Thibault. "Des systèmes multi-agents temporels pour des systèmes industriels dynamiques." Phd thesis, Saint-Etienne, EMSE, 2001. https://theses.hal.science/docs/00/81/83/19/PDF/2001_Carron_Thibault.pdf.
Full textWith industrial systems growing more and more complex, we are led to take explicitly into account the time dimension. In the industrial dynamic systems field, we have to consider the time aspect in the multi-agents systems. To do so, we lay stress upon the "vowels" approach in order to study the time dimension within each of the MAS dimensions such approach reveals. The current methods and tools don't allow us to take the general time aspect into consideration in a MAS. Once analysed the consequences of the consideration of time in each of its aspects, we suggest a set of methods and tools likely to solve the problems which appear and to implement a multi-agents-driven time reasoning. Next, these propositions have to meet the concrete applications from the industrial environment
Carron, Thibault. "Des Systèmes Multi-Agents temporels pour des systèmes industriels dynamiques." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2001. http://tel.archives-ouvertes.fr/tel-00818319.
Full textEnée, Gilles. "Systèmes de Classeurs et Communication dans les Systèmes Multi-Agents." Phd thesis, Université de Nice Sophia-Antipolis, 2003. http://tel.archives-ouvertes.fr/tel-00192372.
Full textNous avons choisi de travailler avec des systèmes de classeurs à algorithme génétique pour représenter les agents. Nous avons introduit un nouveau type de système de classeurs à base de connaissance de taille fixe, les systèmes de classeurs de type Pittsburgh simplifié, dont nous avons étudié les propriétés dans un contexte multi-agents de coordination spontanée.
Nous avons ensuite proposé avec succès aux agents "homogènes" de communiquer pour échanger leur "connaissance" à l'aide de l'élitisme distribué.
Enfin, les agents "hétérogènes" ont échangé efficacement des informations grâce à un modèle minimal de communication que nous avons ancré dans la réalité puis étendu.
Aknine, Samir. "Modèles et méthodes de coordination dans les systèmes multi-agents." Paris 9, 2000. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2000PA090078.
Full textAbou, Khaled Omar. "Modélisation par une approche multi-agents d'un copilote électronique." Compiègne, 1996. http://www.theses.fr/1996COMPD870.
Full textBoussier, 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.
Full textBeurier, Grégory. "Codage indirect de la forme dans les systèmes multi-agents : émergence multi-niveaux, évolution et morphogénèse." Montpellier 2, 2007. http://www.theses.fr/2007MON20179.
Full textSince the end of the XXth century, the man-made systems increased dramatically their internal complexity. This new class of systems comes with a lot of comprehension and implementation problems. In this thesis, we aim to contribute to the design problem of artificial complex systems from the perspective of the form. The form is indeed the support and the adaptation mechanism of the global function of systems. It is thus interesting to control this parameter in order to develop artificial complex systems. We present in this thesis a constructive work on forms. Our goal is to provide behavioral models able to imprint a given form in systems composed by a huge number of autonomous interacting entities. We first justify the use of multiagent systems (MAS) as a paradigm of modeling and simulation and then we present two MAS models able to organize thanks to a given pattern. The first model implements a multi-pheromonal model to produce multi-level emergent forms. The agents react to behavioral and recursive rules and move thanks to tropisms on perceived pheromones. The second model uses morphogenetic rules to make a genetic set of parameters evolve to encode a form. Thanks to the use of tools from evolutionary computing and inspirations taken in the functioning of animal genes (segmentations and selectors) we develop MAS systems able to mutate and to evolve in order to learn specific and complex forms. Then we add some tropism functionalities to the model in order to reproduce the evolution of the form by the mean of aggregation. We finally present the TurtleKit 2 simulation platform and the modifications that we made on it and we conclude by giving some perspectives of such a work
Potiron, Katia. "Systèmes multi-agents et tolérance aux fautes : conséquences de l'autonomie des agents." Paris 6, 2010. http://www.theses.fr/2010PA066656.
Full textPerozo, Niriaska. "Modélisation multi-agents pour systèmes émergents et auto-organisés." Toulouse 3, 2011. http://thesesups.ups-tlse.fr/1531/.
Full textIn this work a multi-agent architecture for self-organizing and emergent systems (MASOES) is defined. This architecture allows the possibility of modeling a self-organizing and emergent system through a society of agents (homogenous or heterogeneous), who work in a decentralized way, with different types of behavior: reactive, imitative or cognitive. Also they are able to dynamically change their behavior according to their emotional state, so that the agents can adapt dynamically to their environment, favoring the emergence of structures. For it, a two-dimensional affective model with positive and negative emotions is proposed. The importance of this affective model is that there are not emotional models for studying and understanding how to model and simulate emergent and self-organizing processes in a multi-agent environment and also, its usefulness to study some aspects of social interaction multi-agent (e. G. The influence of emotions in individual and collective behavior of agents). On the other hand, a methodology for modeling with MASOES is specified, it explains how to describe the elements, relations and mechanisms at individual and collective level of the society of agents, that favor the analysis of the self-organizing and emergent phenomenon without modeling the system mathematically. It is also proposed a verification method for MASOES based on the paradigm of wisdom of crowds and fuzzy cognitive maps (FCMs), for testing the design specifications and verification criteria established such as: density, diversity, independence, emotiveness, self-organization and emergence, among others. It also shows the applicability of MASOES for modeling diverse case studies (in a diversity of contexts) such as: Wikipedia, Free Software Development and collective behavior of pedestrians through the Social Force Model. Finally, the two models proposed in MASOES: the initial multi-agent model and the model with FCMs based on that initial multi-agent model complement each other. This means that it is possible to test the multi-agent model through the meta-model based on FCMs. Besides, it represents a novel alternative to study, test, verify or validate self-organization and emergence in complex systems and test the multi-agent model, since it is difficult to make tests in these systems directly, given the level of uncertainty and complexity they manage
Khatoun, Rida. "Système multi-agents et architecture pair à pair pour la détection d'attaques de déni de service distribuées." Troyes, 2008. http://www.theses.fr/2008TROY0015.
Full textThe Internet has ultimately become, the support for all types of network services which are numerously increasing, interacting and thereby introducing an important dimension of complexity. In addition, they introduce vulnerabilities due to their location and implementation. Indeed, it promotes more covetousness and attacks. In this context, denial of service attacks are among the most popular ones and they are relatively easy to implement. Attack streams are simultaneously generated from several attack machines that are spread all over the Internet and, therefore, making cooperation among a large number of equipment. Such attacks have important economic consequences due to their effects. Many solutions have been proposed to solve this problem, but they are still incomplete because of economical and technical reasons and also for cooperation between different operators of the Internet. Our objective, in this context, is to respond by a solution that is based a distributed architecture of cooperative agents in order to detect intrusions and attacks. The agents are implemented on all the edge routers in an ISP domain. The attack detection is carried out by sharing agents' knowledge about traffic. For an efficient routing algorithm among agents we used a peer-to-peer architecture. This solution has been validated concretely over a real network, integrating the well-known Snort sensor in our intelligent agents and using Pastry as a peer-to-peer protocol for routing information among agents
Tranvouez, Erwan. "IAD et ordonnancement, une approche coopérative du réordonnancement par systèmes multi-agents." Aix-Marseille 3, 2001. http://www.theses.fr/2001AIX30023.
Full textDistributed Artificial Intelligence (DAI) and more particularly MultiAgent Systems (MAS) propose nowadays solutions to many industrial problems. Our research focuses more precisely on workshop scheduling facing dirupting events. We address this issue by proposing a co-operative workshop rescheduling method with a Cooperative Distributed Problem Solving (CDPS) approach. This method is based on an organisationnal modelling of a workshop granting autonomy to the workshop machines, enabling them to engage cooperation to manage a disruption the earliest as possible. To achieve this, we have elaborated a set of repair scheduling strategies and operations consisting in local and limited modification of a disruptive scheduling. To define the cooperative processes involved in the cooperative rescheduling method, we propose a workshop multiagent modelling composed of two categories of agents (scheduler and service agents). .
Foisel, Rémy. "Modèle de réorganisation de systèmes multi-agents : une approche descriptive et opérationnelle." Nancy 1, 1998. http://docnum.univ-lorraine.fr/public/SCD_T_1998_0287_FOISEL.pdf.
Full textSichman, Jaime Simao. "Du raisonnement social chez les agents : une approche fondée sur la théorie de la dépendance." Phd thesis, Grenoble INPG, 1995. http://tel.archives-ouvertes.fr/tel-00005063.
Full textDamamme, Jonathan. "Approche multi-agents pour les problèmes de partage." Electronic Thesis or Diss., Paris 6, 2016. http://www.theses.fr/2016PA066647.
Full textThis thesis covers distributed resources allocation setting, without money balance, where agents have limited knowledge of the system. This thesis will use local swaps, i.e. bilateral deals, where one resource is exchanged for another. This work is divided in two parts. The first part focus the house market, with a very simple mechanism and agents don't use knowledge. The aim will to show that it has however good performances. For this, I will compare the algorithm with those of literature. I will also prove that in the single-peaked domains, this mechanism is Pareto-optimal. The second part examines a general framework. The mechanism contains three sub-protocols : contact protocol, negotiation protocols, and stop conditions. Each protocol will be described and experimented
Ductor, Sylvain. "Mécanismes de coordination pour l'allocation dynamique de ressources dans des systèmes multi-agents large-échelle et ouverts." Paris 6, 2013. http://www.theses.fr/2013PA066036.
Full textMAS offer a paradigm that is adapted to resolve distributed constraint optimisation problemsNowadays, more application must handle such problems, and notably in domains like cloud computing or ubiquitous computing. In those domains, differents agents, that may have potentially conflicting objectives, must coordinate in order to find a common solution. The aim is to optimise agents utilities while respecting problem constraints. We are interested in large-scale open and dynamic applications. Welfare engineering has recently propose a solid theoretical and experimental analysis for those kind of problems : iterated consensual negociation. This domain studies the relations between the agent rationalities, the coordination mecanism and the social abjective. However, as far as we know, no study of this domain was about formalising and designing coordination mecanisms. This thesis is about designing operational mecanisms in the context of welfare engineering. We firstly contribute to this domain by elaborating a formal model of coordination mecanisms and then we develop an abstract architecture for agent negociation. We propose five mecanisms that are applicable to large scale dynamic and open application. Four of them consider the restricted contect of resource allocation. Finally an experimental validation has been conducted and compared the mecanisms to a parallel and a distributed approach
Damamme, Jonathan. "Approche multi-agents pour les problèmes de partage." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066647.
Full textThis thesis covers distributed resources allocation setting, without money balance, where agents have limited knowledge of the system. This thesis will use local swaps, i.e. bilateral deals, where one resource is exchanged for another. This work is divided in two parts. The first part focus the house market, with a very simple mechanism and agents don't use knowledge. The aim will to show that it has however good performances. For this, I will compare the algorithm with those of literature. I will also prove that in the single-peaked domains, this mechanism is Pareto-optimal. The second part examines a general framework. The mechanism contains three sub-protocols : contact protocol, negotiation protocols, and stop conditions. Each protocol will be described and experimented
Hamel, Athmane. "Conception participative et coopérative de simulations multi-agents : application à la filière avicole." Paris 9, 2006. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2006PA090071.
Full textIn order to simulate the impacts of individual behaviours on organisations’ objectives, participatory approaches are well-established methods. This thesis proposes a new Approach for Cooperative Knowledge Acquisition (Acka). Acka is a cooperative method, based on the experts’ participation within role-playing games during meetings. Our approach proposes to build a metaphoric model as a domain model which is then used to design the multi-agent simulation model. The application of Acka to study microscopic decision-making processes within the poultry production system, and to design a multi-agent participatory simulation is illustrated. This simulation model, called AviSim, aims at understanding the impacts of individual decisional behaviours on the use of raw materials within poultry. Acka&AviSim proposes a new participatory approach, based on the coupling of two kinds of representation modes: observation-based mode and cognition-based mode. Finally, a personal reflection about the participatory design is proposed
Dinont, Cédric. "Calculs longs et partage des ressources processeur dans les systèmes multi-agents cognitifs." Lille 1, 2007. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2007/50376-2007-21.pdf.
Full textZargayouna, Mahdi. "Modèle et langage de coordination pour les systèmes multi-agents ouverts : Application au problème du Transport à la Demande." Paris 9, 2007. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2007PA090026.
Full textThis P. H. D thesis proposes a data-oriented coordination model for open multi-agent systems. The coordination model Acios models agents with a state that is observable from the environment, the agents access data associatively with a matching mechanism allowing them to express complex interactional needs, notably contextual. Data exchanged within a multi-agent system adhering to the Acios model are made secure by the agents and by the system designer. Acios models an open multi-agent system, allowing external systems to link the agents' free variables evolving in the system. The coordination language Lacios and the associated operational semantics allow to write programs adhering to the model and specifies unambiguously the expected behavior of the system. An implementation in the form of a script language over Java is developed, allowing to build a system focusing on high-level coordination and guarantying that it adheres to the Acios model. The grounding application is a highly complex system that is suitable for distributed modelling. It's the dynamic vehicle routing problem and more specifically its dial-a-ride version. An application written in Lacios is proposed, the respect of the constraints is guaranteed thanks to the observation of the environment objects properties. A new measure to choose between concurrent vehicles is proposed, based on the quantification of their perception fields
Duvallet, Claude. "Des systèmes d'aide à la décision temps réel et distribués : modélisation par agents." Phd thesis, Université du Havre, 2001. http://tel.archives-ouvertes.fr/tel-00005194.
Full textCorrea, e. Silva Fernandes Kelly Christine. "Systèmes multi-agents hybrides : une approche pour la conception de systèmes complexes." Université Joseph Fourier (Grenoble ; 1971-2015), 2001. http://www.theses.fr/2001GRE10121.
Full textQuesnel, Gauthier. "Approche formelle et opérationnelle de la multi-modélisation et de la simulation des systèmes complexes : apports pour la simulation de Systèmes Multi-Agents." Littoral, 2006. http://www.theses.fr/2006DUNK0155.
Full textWithin the field of scientific research, we attend, since a few years, a rapid growth of the multimodeling activities – i. E. The use of various formalisms combination in order to study complex systems where computer science is an operational, or theoretical, support to tackle their studies. The problematic presented in this thesis work follows from these works. We study, in particular, the coupling of heterogeneous models using a discrete event specification proposed by B. P. Ziegler : DEVS (acronym of Discrete Event System specification). Our works provide, mainly, tools as well as operational in order to simplify the coupling, and the models development. We also study the build of experimental design, the setup of models, and the distribution of simulations. Thanks to these works, collaborations with biology labs have been initialized. Following their needs, we have to create a formal specification of Multi-Agents Systems, individual based models more precisely. We propose a specification that relies on the works of J. C. Soulié with the concept multiples environments ; and works of R. Duboz for the agents behaviour. All the objects used in multiagents systems are defined using a modular approach where each entity is specialized into a dedicated domain. In order to develop all the concepts studied in this thesis work, a platform called VLE (acronym of Virtual Laboratory Environment) has been programmed. This platform covers all the fields of the multimodeling activities and relies on the decomposition principle
Wang, Dong Hue. "Systèmes multi-agents adaptatifs avec contraintes temps-réel : De la spécification formelle à la vérification et à la génération de code." Evry-Val d'Essonne, 2005. http://www.theses.fr/2005EVRY0011.
Full textThe design of reactive systems must comply with logical correctness (the system does what it supposed to do) and timeliness (the system has to satisfy a set of temporal constraints) criteria. In this paper, we propose a global approach for the design of adaptative reactive systems, i. E. Systems that dynamically adapt their architecture depending on the context. We use the timed automata formalism for the design of the agents' behaviour. This allows evaluating beforehand the properties of the system (regarding logical correctiness and timeliness), thanks to model-checking and simulation techniques. This model is enhanced to tools that we developed for the automatic generation of code, allowing to produce very quickly a running multi-agent prototype satisfying the properties of model
Stuker, Simon. "Définition et exploration des propriétés formelles des logiciels auto-organisateurs à fonctionnalité émergente." Toulouse 3, 2014. http://thesesups.ups-tlse.fr/2556/.
Full textIn this thesis we are interested in the formal study of multi-agent systems with emerging functionnalities. These systems have the particular feature of being formed by a large number of autonomous entities, called agents, endowed with individual objectives and generally with limited perception, reasoning and action capacities at their disposal. The global functioning of the system emerges from their interactions. In many applications, these systems have shown interesting global properties, such as convergence to interesting regimes or stabilty of these regimes. The objective of this thesis is to use mathematical methods to prove and explore these properties formally. An important step in this approach is the research of the most adequate mathematical models for the study of multi-agent systems. The qualities and limits of several relevant models are analysed, and end up in an extended study of Markov decision processes on one hand, and of mean field methods on the other hand. Next, we focus on localised systems and rigourously derive a continuous model. Using tools of mathematical analysis we establish dynamical properties, namely convergence to an interesting equilibrium and stability of this equilibrium. This reasoning is extended to a well-known localised system in the field of multi-agent systems, for ressource collection, and allows to illustrate an interesting phenomenon by numerical simulations
Secq, Yann Benoît Daniel. "RIO : Rôles, Interactions et Organisations : une méthodologie pour les systèmes multi-agents ouverts." Lille 1, 2003. https://ori-nuxeo.univ-lille1.fr/nuxeo/site/esupversions/0872ca5c-50d9-4c16-95eb-8ccdde4dedf9.
Full textMoncion, Thomas. "Modélisation de la complexité et de la dynamique des simulations multi-agents : application pour l’analyse des phénomènes émergents." Thesis, Evry-Val d'Essonne, 2008. http://www.theses.fr/2008EVRY0038/document.
Full textMulti-agent systems are characterized by the cooperative work of a set of autonomous agents, operating in a decentralized manner with a view to achieving a goal. Within these systems produce phenomena known as emergence, or self-organization, in which structures or organizations may appear on a collective level that were not explicitly described at the individual level. Thus ants that are organized into files of individuals without having representation corresponding to the "file". Through their interactions at the local level, the agents produce and maintain structural dynamics at the global level which in turn constrain the activities of each individual. These phenomena are fundamental in the study of complex biological systems but are very difficult to formalize because usually related to a subjective interpretation of an observer outside the system. The subject is intended to address the problem of transition from one level of abstraction to another, and the interaction, within a system between officers of different levels, combining several complementary approaches: a first approach concerns study formalisms adapted to the representation of emergent phenomena. This includes taking account of relationships between entities of different levels of abstraction, and by taking behaviors that are expressed differently depending on the level of abstraction to which the entity is considered. a second approach which builds on the previous concerns the automatic detection of emergent phenomena. To do this, it will be necessary to develop mechanisms that allow entities that participate in the system to detect the emergence of structures (spatial and / or temporal, static or dynamic) and characterize the passage of a given level of abstraction to the next level. because of the great difficulty of dealing with the previous problem in all its generality, we plan to develop a semi-interactive approach in which a human observer may have a role to guide the system to detect structures and their characterization of a particular way. In addition to assisting the system, it is the guide to take into account a priori abstractions useful and interesting. This includes the design of procedures for display and interaction adapted to this problem. these issues will be explored in several issues of multi-agent simulation in biology
Postat, Valentin. "Représentation et optimisation de maillage structuré par blocs à l'aide de systèmes multi-agents." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASG003.
Full textThis thesis deals with the representation and generation of block-structured hexahedral meshes. To date, there is no method for generating satisfactory block structures for any geometric domain. In practice, expert engineers generate these meshes using interactive software, which can take several weeks to complete. Moreover, adding modification operations in these interactive softwares is a delicate task to maintain the coherence of the block structure and its relationship with the geometric domain to be discretized. In order to improve this process, we first propose to define hexahedral mesh manipulation operations based on the use of the generalized map model. Then, by considering block structures obtained using the Polycube method, we provide methods for optimizing the topology of these structures to satisfy constraints of a geometric nature. We propose a first method in dimension 2, which considers a local approach to the problem based on the experience of engineers working with interactive software. We then propose a second method, this time using ant colony optimization meta-heuristics for leaf selection in dimension 3
Soyez, Jean-Baptiste. "Conception et modélisation de systèmes de systèmes : une approche multi-agents multi-niveaux." Thesis, Lille 1, 2013. http://www.theses.fr/2013LIL10184/document.
Full textThe main problematic of this thesis, which takes place in the context of the european project InTraDE (Intelligent Transportation for Dynamic Environment), deals with the modeling of systems of systems (SoS). A SoS is a system composed of a hierarchy of autonomous systems present in several representation levels. This thesis answers the need of generic modeling tools respecting the fundamental characteristics of SoS, proposing a multi-level multi-agent formalism and algorithms wich insure their respect. The use of a multi-agent model allows to take advantage of the natural autonomy of agents and the multi-level aspect of our model permits to modeled entities to reason about the organisational hierarchy of the system, carrying the explicit notion of level. Besides the modeling of complex systems, this thesis also deals with the problematic related to their simulations, particularly, the fact that computer resources (used memory and microchips) needed to simulate with precision such systems are truly important. We propose a methodology to benefit from the muli-level simulations capacity to produce compromise between the simulation precision and the used computer resources