Dissertationen zum Thema „Dynamique synchrone“
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Budau, Victor. „Gestion dynamique des communications dans les systèmes distribués par commutation synchrone/asynchrone“. Evry, Institut national des télécommunications, 2003. http://www.theses.fr/2003TELE0002.
Der volle Inhalt der QuelleAs the programming of the distributed applications has become very complex, new programming models were created to facilitate the comprehension, the design and the implementation ot these applications. Amongst these models, the remote procedure call and the structures based on event notification imposed themselves as successful solutions for distributed programming. The middleware platforms have greatly eased the dialog between heterogenoeous parts of the systems and the component-oriented development helps to manage the complexity, the heterogeneity and the need for adaptability and reconfiguration of these systems. However, these platforms make an implicit, yet natural, association between these programming models and the communication models (synchronous and asynchronous) they support : remote calls are synchronous (simultaneous availability of the communication entities) and applications programmed in an event-based paradigm communicate asynchronously, with messages. The use of both types of communication, rarely addressed due to its programming difficulty, remains aprolific research subject. In this thesis we propose a mechanism of chanching dynamically (during the execution) and transparently 'without changing the application code) the communication model between the components of a distributed system. This mechanism is integrated in a architecture that adds an adaptative behavior to a communication platform. The utility of changing the communication type in the context of large scale or mobile applications, as well as the limits of this approach are studied. The mechanism was implemented on a J2EE open source application server in order to validate the working hypothesis and to perform the necessary benchmarks for performance gain and flexibility of programming comparisons
Mostafa, Mostafa Mahmoud Fahmy. „Contribution à la modélisation statique et dynamique de la machine synchrone autopilotée“. Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb375998086.
Der volle Inhalt der QuelleDabrowski, Frédéric. „Programmation réactive synchrone : langage et contrôle des ressources“. Paris 7, 2007. http://www.theses.fr/2007PA077140.
Der volle Inhalt der QuelleReactive System continuously interact with an environment. Synchronous languages (a family of languages dedicated to the design of such Systems) are used to describe parallel behaviours running in a synchronous way, with respect to a logical clock associated to an instantaneous broadcast of the information. The design of those languages enables a compilation of programs to sequentiel code, finite state automata or circuits. Yet the constraints set on their design to reach this goal restrict their use to very specific fields. Reactive programming is a paradigm based on a relaxation of those constraints. More precisely, il is inspired by the Esterel language and may be used for programming, e. G. , event driven controllers, graphical user interfaces, physical simulations, web services and multi-player games. This document, split into two parts, deals with the notion of safety in the framework of reactive programming. In the first part, we consider the issue of controlling, by means of a static analysis, the resources needed to run programs of a synchronous process algebra inspired by the reactive paradigm. In the second part, we are interested in programming multicore architectures. We propose a programming discipline, enforced by a static analysis, which extends to a more general framework the advantages of the purely cooperative approach (scheduling) used in various languages based on the reactive paradigm
Passos, Sébastien. „Dynamique des systèmes d'entraînement par courroie synchrone intégrant des poulies à profils innovants“. Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI049.
Der volle Inhalt der QuelleIn response to ever-stricter requirements for internal combustion engine efficiency, noise and reliability, car manufacturers now commonly design Timing belt drives comprising innovative pulleys with non-circular (NC) profiles. For well-chosen design parameters (profile shape, angular phasing), the use of a NC pulley can considerably improve the vibratory performances of a timing belt transmission. Nevertheless, designing efficiently a belt transmission including NC pulleys remains hard to accomplish. To achieve this, it is important to clearly understand and identify the impact of such pulleys on the dynamic behaviour of Timing belt drives. In this context, a numerical model able to simulate the angular dynamics of Timing belt drives comprising NC pulleys has been developed. The model is based on a discrete approach (0D/1D), similar to the models of transmissions with circular pulleys only. The belt is modelled as a 1D linear elastic material (wire) and the pulley are considered as rigid bodies represented by rotary inertias. Rotations of the driven pulleys are the degrees of freedom of the discrete system. The pulley rotation is actuated by the effect of the belt span tensions applied at the belt/pulley seating/unseating points. In the case of a NC pulley, these points are mobile and their motion has to be tracked rigorously. To achieve this, a novel formulation has been written by establishing a feed-in/out balance on the belt spans using a Lagrangian-Eulerian method. In parallel to the numerical developments, experimentations have been performed for analysing the impact of an oval pulley on Timing belt drive angular dynamics (4 cylinder engine). The experimental test rig has been fully developed during this thesis. It is equipped with numerous sensors that enable a complete analysis of belt transmission angular dynamics. Finally, comparative analyses have shown a quite good agreement between experiments and simulations
Benyoucef, Lyes. „Résolution d'un problème d'ordonnancement dynamique d'un fournisseur dans un mode d'approvisionnement de type "livraison synchrone"“. Grenoble INPG, 2000. http://www.theses.fr/2000INPG0111.
Der volle Inhalt der QuelleLiu, Rongfan. „Comportement d'une chaîne de traction synchrone avec l'onduleur de courant : modélisation et simulation : optimisation statique et dynamique“. Toulouse, INPT, 1988. http://www.theses.fr/1988INPT025H.
Der volle Inhalt der QuelleLiu, Rongfan. „Comportement d'une chaîne de traction synchrone avec onduleur de courant modélisation et simulation, optimisation statique et dynamique /“. Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376152590.
Der volle Inhalt der QuelleDieng, Abdoulaye. „Modélisation dynamique et commande d'un ensemble « génératrice synchrone pentaphasée à FEM non sinusoïdale – convertisseur AC/DC » tolérant aux défauts“. Nantes, 2014. http://archive.bu.univ-nantes.fr/pollux/show.action?id=f111b637-afbe-49f3-b3a3-033b65a51a64.
Der volle Inhalt der QuelleIn the context of exploitation of marine renewable energy sources, the access difficulties to the installations requires to explore fault-tolerant energy conversion systems. This Doctorate thesis deals with the dynamical modeling and control of an innovative energy conversion chain. The studied conversion chain consists of a non-sinusoidal EMF 5-phase permanent magnet synchronous generator which delivers the energy to the DC bus via an AC/DC converter. Two AC/DC topologies are investigated: a 5-phase PWM rectifier and a 5-phase VIENNA rectifier. The energy transfer optimization needs optimal control strategies using all the EMF harmonics in normal mode and in specific fault mode due to the opening of one phase of the generator. Specific control algorithms are developed based on the possible connection between the neutral of the machine and the midpoint of the DC bus. Particular profiles of the current references imposed by the control strategies require robust and high dynamic performance controllers. For the inner current loops, the linear PIα fractional controller and a specific non-linear phase-shift self-oscillating controller are synthesized. For the outer voltage loop, control strategies are developed and regulators are synthetized. Software and experiment test benches are built. Results illustrate the working and performances of the control strategies developed for different scenarii with both converters
Poure, Philippe. „Contribution à l'étude du filtrage dynamique d'un réseau électrique à l'aide d'une machine synchrone commandée par les grandeurs rotoriques“. Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL004N.
Der volle Inhalt der QuelleMoulichon, Audrey. „Conception d'un système adaptatif dynamique de "générateur synchrone virtuel" pour la stabilisation des micro-réseaux électriques à fort taux de pénétration d'énergie renouvelable“. Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAT064.
Der volle Inhalt der QuelleThe classical distributed energy resources (DER) supplying energy to microgrids (usually diesel generator-sets) are progressively supplanted by supplier based on renewable energy sources (RES). However, the intermittency of RES leads to major stability issues, especially in the context of microgrids, notably because these sources usually decrease the available inertia of the grid. Hence, the traditional control strategies for inverters, interfacing the various DERs connected to the microgrid, needs adapting.The virtual synchronous generator (VSG) is one of the most popular solution that can participate in increasing the microgrids inertia and that could be integrated into traditional stability studies because it presents similarities with a synchronous machine. As the VSG is still a recent concept, mostly considered for the DER integration in microgrid, various problematics remain unresolved (some of which are addressed in this manuscript). In addition, the different solutions that can be found in the literature do not consider the industrial and practical aspect of its development (also considered in this industrial thesis).This thesis is dedicated to the VSG-based inverters and their integration in microgrids with a high level of variable renewable energy penetration. This PhD have been carried out thanks to the cooperation between two laboratories, G2Elab and Gipsa-Lab, in collaboration with Schneider Electric and its R&D team, Power Conversion
Grézaud, Romain. „Commande de composants grand gap dans un convertisseur de puisance synchrone sans diodes“. Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT107/document.
Der volle Inhalt der QuelleWide band gap devices already demonstrate static and dynamic performances better than silicon transistors. Compared to conventional silicon devices these new wide band gap transistors have some different characteristics that may affect power converter operations. The work presented in this PhD manuscript deals with a specific gate drive circuit for a robust, high power density and high efficiency wide band gap devices-based power converter. Two critical points have been especially studied. The first point is the higher sensitivity of wide band gap transistors to parasitic components. The second point is the lack of parasitic body diode between drain and source of HEMT GaN and JFET SiC. In order to drive these new power devices in the best way we propose innovative, robust and efficient solutions. Fully integrated gate drive circuits have been specifically developed for wide band gap devices. An adaptive output impedance gate driver provides an accurate control of wide band gap device switching waveforms directly on its gate side. Another gate drive circuit improves efficiency and reliability of diode-less wide band gap devices-based power converters thanks to an auto-adaptive and local dead-time management
Merabtene, Mourad. „Modélisation dynamique et commande d'une machine synchrone double étoile alimentée par des onduleurs MLI fonctionnement en mode normal et en mode dégradé“. Nantes, 2005. http://www.theses.fr/2005NANT2032.
Der volle Inhalt der QuelleThis thesis presents the dynamic modelling in view of simulation and control of the double star salient poles synchronous machines supplied by PWM inverters. Based on the established modelling approaches, the initial machine's model, characterised by a strong coupling, is transformed on several magnetically decoupled equivalents models. These modelling approaches are extended to the functioning under fault condition of the electrical drive. Specific simulation software is developed in view to simulate and to analyse the dynamic behaviour of the inverters-machine set under balanced and unbalanced functioning. In order to minimise the torque ripples and the losses under fault condition, a control strategies are elaborated. A generalised control algorithm is proposed for the torque control in the two operating modes. The various studies were validated on an experimental prototype
Barrenscheen, Jens. „Commande économique d'un moteur synchrone à aimant permanent - architecture matérielle et logicielle - estimation de la position - modélisation dynamique au sens des systèmes échantillonnes“. Paris 6, 1995. http://www.theses.fr/1995PA066516.
Der volle Inhalt der QuelleAmmari, Ahmed Chiheb. „Comportement électromécanique d'une machine synchrone soumise à un cycle de réenclenchement monophasé“. Grenoble INPG, 1996. http://www.theses.fr/1996INPG0057.
Der volle Inhalt der QuelleAndrieux, Christian. „Réalisation d'un ensemble à vitesse variable de dynamique élevée : conception de la machine synchrone, mise en oeuvre de son alimentation et étude de la boucle d'autopilotage“. Toulouse, INPT, 1986. http://www.theses.fr/1986INPT069H.
Der volle Inhalt der QuelleBourget, Pierre. „Coronographie à masque adaptatif pour imagerie et détection à haute dynamique“. Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4375.
Der volle Inhalt der QuelleHigh contrast imaging of extra-solar planets and environments of bright astro- physical objects in general, such as stars, active galactic nuclei or objects of the Solar System is a challenging task. Different approaches are needed if the bright region to occult is optically resolved or not. We present the Adaptive Mask concept, observations on sky and numerical simulations show the usefulness of the proposed methods to optimize the efficiency of the coronagraphs for optically resolved or non resolved objects. Accessing small IWA is considered as an edge as it provides substantial scientific and technical advantages. One of the difficulties of accessing small IWA is that coronagraphs become very sensitive to low-order aberrations such as tip-tilt. Our original approach aims at integrating the small IWA capability and the mitigation of sensitivity to low-order aberrations within the coronagraph itself. Our concept is applicable to both low and high Strehl regimes, corresponding to current and next generation AO systems. The adaptive coronagraph can adapt dynamically, in quasi real time, to adjust to the observing conditions to deliver a stable and optimized contrast at the science image level. The mask adaptability both in size, phase and amplitude also compensates for manufacturing errors of the mask itself, and potentially for chromatic effects. The mask adaptability concept using a local phase modulation in the focal plane allows synchronous modulation for high dynamic range synchronous detection of a faint target immersed in a background. The coherence of the speckles with the central star is used to discriminate them from proper companions
Andrieux, Christian. „Réalisation d'un ensemble à vitesse variable de dynamique élevée conception de la machine synchrone, mise en oeuvre de son alimentation et étude de la boucle d'autopilotage“. Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37595521m.
Der volle Inhalt der QuelleTia, Philippe. „Etude paramétrique des performances d'une structure de machine synchrone à aimants alternés, concentration de flux et bobinages globalisés“. Montpellier 2, 1996. http://www.theses.fr/1996MON20239.
Der volle Inhalt der QuelleLee, Eun Joo. „Reconfiguration dynamique de la commande d'un système manufacturier : approche par la synthèse de commande“. Phd thesis, Ecole Centrale de Lille, 2006. http://tel.archives-ouvertes.fr/tel-00121727.
Der volle Inhalt der QuelleDans ce travail, nous proposons un nouveau problème pour la modélisation des spécifications utilisateurs : le « Problème des Séquences Interdites de Transitions d'États» (PSITE). Nous proposons alors le « Graphe d'Accessibilité Synchrone Contraint » (GASC) pour synthétiser le modèle du procédé et le modèle des spécifications tous les deux basés sur les RdPs. Pour réaliser la synthèse, nous utilisons la théorie des régions revisitée par les travaux de thèse de A. Gaffari.
Dans la deuxième partie du travail nous montrons dans un premier temps que cette approche peut être utilisée pour la synthèse d'allocateurs de ressources, pour rendre déterministe l'interprétation de gammes opératoires. L'idée à ce niveau est de pouvoir synthétiser des contrôleurs déterministes qui mettent en œuvre un ordonnancement cyclique donné, établi en tenant compte de l'état du procédé et des objectifs de production. Ce travail est complété par la proposition d'un outil logiciel dont nous présentons le fonctionnement, l'intérêt et également les limites actuelles.
Picard, Marchetto Aymeric. „Isomorphisme de réseaux d'automates et son influence sur le graphe d'interaction“. Electronic Thesis or Diss., Université Côte d'Azur, 2024. http://www.theses.fr/2024COAZ4034.
Der volle Inhalt der QuelleAn automata network with n components on a finite alphabet Q is a discrete dynamical system described by successives iterations of a function f : Qⁿ → Qⁿ. An important parameter in most applications is the interaction graph: a graph with vertices from 1 to n and with an arc from i to j if f_j(x) depends on x_i. In general, this interaction graph is easier to approximate than the network's actual dynamic. This raises an important question: what does the interaction graph tell us about the network's dynamic? In an attempt to find limits to this question, we study the inverse: what does the network's dynamic tell us about its interaction graph? To this end, we study networks up to isomorphism. Isomorphism preserves most studied properties, but does not preserve the interaction graph. We will thus study G(f), the set of interaction graphs of all networks isomorphic to f. Notably, we prove that K_n, the interaction graph with all arcs, is always in G(f), and it's the only graph with this property. This means if K_n is the interaction graph of f, then it gives no information on f up to isomorphism. Inversely, we show there are networks f that give no information on their interaction graph: G(f) contains all graphs, except the empty one. Finally, we also study the impact of isomorphism on asynchronous dynamics. We show that it preserves very little properties of those dynamics, except the number of fixed points
TARISIEN, Medhi. „Dynamique de la fragmentation de molécules simples induite par impacte d'ion multichargé“. Phd thesis, Université de Caen, 2003. http://tel.archives-ouvertes.fr/tel-00005217.
Der volle Inhalt der QuelleVieillard, Thomas. „Dynamique induite par champ laser femtoseconde intense : alignement moléculaire en milieu gazeux dense et effet Kerr“. Phd thesis, Université de Bourgogne, 2011. http://tel.archives-ouvertes.fr/tel-00697019.
Der volle Inhalt der QuelleKhatounian, Flavia. „Contribution à la modélisation, l'identification et à la commande d'une interface haptique à un degré de liberté entrainée par une machine synchrone à aimants permanents“. Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2006. http://tel.archives-ouvertes.fr/tel-00136089.
Der volle Inhalt der QuelleDumas, Guillaume. „Dynamiques neuronales de l'interaction imitative synchrone“. Paris 6, 2011. http://www.theses.fr/2011PA066484.
Der volle Inhalt der QuelleDuboux, Thibault. „Régulation dynamique du partitionnement de données sur machines parallèles à mémoire distribuée“. Lyon, École normale supérieure (sciences), 1996. http://www.theses.fr/1996ENSL0009.
Der volle Inhalt der QuelleLi, Li. „Etude et mise au point d'une nouvelle famille d'alterno-démarreur pour véhicules hybrides et électriques“. Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00639305.
Der volle Inhalt der QuelleFernandez, Oliveros Kervy Carola. „Décodage de l'impact des séquences de promoteurs sur la dynamique transcriptionnelle in vivo“. Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTT074.
Der volle Inhalt der QuelleTranscription in eukaryotes is highly complex process that requires precise coordination in the assembly of trans-regulating factors through the recognition of cis-regulatory DNA sequences. By employing quantitative live imaging methods combined with a mathematical deconvolution model, we assess the influence of the core promoter DNA sequences on transcription dynamics in vivo. Furthermore, manipulation of TATA box from a robust developmental core promoter: snail, in a transgenic context showed its influence to foster nuclei activation within the pattern. Moreover, strong mutation of the TATA does not lead to promoter death, suggesting an inherent potential of this promoter to allow permissive transcription. In contrast, mutations of the INR motif in the kruppel transgenic core promoter does not change the timing of nuclei activation; neither the probability of nuclei activation, but rather the INR mutations seems to affect the promoter strength. We show in this study that core promoter sequence might act as a key step to regulate gene expression, and its element composition might be adapted to particular gene context
Viviani, Jérémie. „Dynamique de l'évolution de la denture en rapport avec l'habitat, le comportement et le régime alimentaire chez les poissons perroquets (Scarinae, Labriformes)“. Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEN080.
Der volle Inhalt der QuelleParrotfishes, divided into the tribes Scarini and Sparisomatini , are labrid fishes that arouse from carnivorous ancestors. One of the main factors that explain this radiation is the exploitation of microorganisms as a food source. While most Sparisomatini browse macroalgae to get epiphytic microorganisms, grazing parrotfishes (all Scarini and some Sparisoma) scrap or excavate hard substrate to obtain epilithic and endolithic microorganisms. Changes in feeding behaviour are associated with dentition specialization with notably dental plates in grazing but also some browsing parrotfishes. Gene-based phylogenies contradicted the previous evolutionary scenario about parrotfish dentition evolution, which states the progressive emergence of dental plates from non-coalesced dentitions. This thesis manuscript aims to re-examine the evolution of parrotfish dentitions in the light of the new phylogenies by using X-ray 3D microtomography, and to link this evolution with diet and ecology
Abboud, Mohssen. „Tolérance aux défaillances dans les réseaux dynamiques“. Paris 7, 2008. http://www.theses.fr/2008PA077176.
Der volle Inhalt der QuelleWe study how some fault-tolerant algorithms for classical Systems can be extended to t}e used in larger scale networks. In the first part of this thesis we address the problems of reliable broadcast and consensus in sensor networks communicating with radio-broadcast. Communication is prone to collision when several sensors broadcast simultaneously. Moreover sensors may crash and stop sending. In this framework, reliable broadcast and consensus are not possible to solve. Sensors are equipped with collision detectors. We propose some specifications of collision detectors that enable us to achieve reliable broadcast, consensus and we give some algorithms for this. In the second part we consider a dynamic network of processes communicating by sending messages. The network is dynamic in the sense that the processes are created dynamically and each process does not know either the number or the set of created processes, but it has a unique identity. Created processes are prone to failure. We study three classical problems of fault-tolerance in the case where the set of processes is unknown. The three problems are: the consensus problem, the implementation of atomic registers and the eventual leader election. For this we consider different models in respect of their degree of synchrony (asynchronous, partially synchronous, synchronous), and we prove how to solve these problems in every considered models
Valencia, Alba. „Le langage des adolescents. Une etude de la synchronie dynamique de lespagnol du chili“. Paris 5, 1988. http://www.theses.fr/1988PA05H090.
Der volle Inhalt der QuelleIt is the aim of this dissertation to describe the language spoken by teen-agers of santiago, trying to discover its differences with standard chilean spanish in order to define the scope of this sociolect within the national linguistic context. The informants were boys and girls between 14 and 17, born and raised in santiago. They belong to three different socio economic and cultural levels. The informant group was selected according to statistical criteria so that it be a representative sample of the total population belonging to this social segment. Phonological, syntactic and lexical traits which characterize the spanish spoken by this age group, are described as they appear in a corpus obtained through recorded interviews and questionnaires. Out of the stratificational variables considered in the survey, the socioeconomic and cultural level turned out to be the most decisive in the language behaviour of the group. Most of the innovations - and the most prominent of them - are phonological and lexical; as for the syntax, it follows the normal patterns of the language and presents variations at the morphology level only. Particularly interesting is the treatment of "sulcal" phonems. Lexical innovation - including new words and new synthemes - is the most notorious feature of this sociolect
Malderez, Isabelle. „Contribution à la synchronie dynamique du français contemporain : le cas des voyelles orales arrondies“. Paris 7, 1995. http://www.theses.fr/1995PA070018.
Der volle Inhalt der QuelleBesides my own hypothesis (chapter 1), i go through the main possibilities explaining changes - the purely linguistic ones, and the extra-linguistic ones (chapter 2). I claim that change could be observed within synchronic studies, and particularly i stress upon the variability concept (chapter 3), then i relate different theories about change's diffusion through linguistic community (chapter 4). These theoretical considerations end with the matter of change's diffusion across lexicon - neogrammarian theory versus lexical diffusion theory (chapter 5). In chapters 6 to 10, i set out four experiments about the change itself (the "what" and the "how"). First experiment, as a preliminary, lay evidence on backing from readings of parisian people (chapter 6). The second one is a large spelling survey upon pupils and students. It shows that the change appears in writing too - as spelling errors - essentially among pupils, but also among adults in special words (chapter 7). I had to define experiments to highlight changes below the conscious level of speakers. The third experiment (chapter 8) is a survey upon a small and geographically homogeneous population. It reveals differences of perception and production of vowels o and o between two generations. Chapter 9 is an analysis of categories' perception of synthetic stimuli by some thirty subjects. Chapter 10 is an acoustic analysis of these vowels out of readings and interviews of few of these subjects
Abbas, Khaled. „Effet de traitements thermiques sur les propriétés fonctionnelles de fromages traditionnels : le cas des pâtes persillées“. Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2012. http://tel.archives-ouvertes.fr/tel-00724803.
Der volle Inhalt der QuelleJeannet, Bertrand. „Partitionnement dynamique dans l'analyse de relations linéaires et application à la vérification de programmes synchrones“. Grenoble INPG, 2000. http://www.theses.fr/2000INPG0074.
Der volle Inhalt der QuelleBret, Victor. „Dynamique spatio-temporelle des populations de truites en milieu naturel et au voisinage des ouvrages hydroélectriques“. Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1051/document.
Der volle Inhalt der QuelleBrown trout (Salmo trutta) ecology was largely studied. However, the process structuring the spatiotemporal patterns of population dynamics remains unclear. The objective of this thesis was to identify the demographic processes (e.g. survival or displacements) and the influence of biotic (between-individuals interactions) and abiotic (environmental conditions) processes structuring the age-stages (fry, juveniles and adults) of these populations in time and space.I studied (1) the role of density-dependence on survival and (2) the influence of environmental conditions experienced by trouts (hydraulics and water temperature). To assess the results’ transferability, I studied (3) the spatial scale (global or local) of influence of the processes and (4) if those processes varied among populations (hierarchical approach).I considered the dynamics of 45 trout populations, 22 being located downstream a hydropower facility. At a large scale, the recruitment of distant populations (up to 75 km apart) may be synchronized by large floods during emergence of fry or by spawning substratum displacements. We summarized the results of a determinist population dynamics models, locally calibrated on nine reaches showing well-described environmental conditions. This summary revealed the influence of various local drivers on population dynamics. Finally, a hierarchical model showed that density-dependent mortality among juveniles and adults was a key biotic process. The strength of the competition was greater in absence of shelter (<2% of the surface) and varied with water temperature (decreasing for juveniles and increasing for adults).The results of this work will provide scientific basis to hydropower facility managers. This will help them to reduce their influence on trout populations and respond to regulatory demands
Saint, Georges Chaumet Catherine. „Dynamique, synchronie, réciprocité et mamanais dans les interactions des bébés autistes à travers les films familiaux“. Phd thesis, Université Pierre et Marie Curie - Paris VI, 2011. http://tel.archives-ouvertes.fr/tel-00646608.
Der volle Inhalt der QuelleAzil, Azzedine. „Modélisation et simulation des systèmes dynamiques hybrides : formalisme Scicos et compilation“. Paris 11, 2005. http://www.theses.fr/2005PA112089.
Der volle Inhalt der QuelleIn this thesis we present a methodology for modelling and simulation of hybrid dynamical systems. The main objective of this modelisation is the simulation of a complete system, i. E. The environment with control system and the way to satisfy the industerial needs such as validating the control laws. The main contribution of this thesis is extending the Scicos formalism to have a well defined mathemathical formalism to model and simulate a large class of hybrid dynamical system. Then we have implemented this formalism in compilation semantic that we have developped different aspects and compilation rules to make Scicos compiler robust and adapted to real-time applications. The new compiler generates a recursive model in which all activations are synchronous. So it is necerssary to use the simulator recursively. The simulation has been detailed with analysis and adaptation of different functions with their execution as wel as the their evolution. At last, the automatic code generation has been introduced. In this section, we have proposed a new contribution to obtain a code characterizing the description aslgorithm of any part of a Scicos diagram (discret or continuous). In general, this code is use ether to accelarate the scicos simulation ( by using a single standard block instead of a super block) or in real time applications
Folgoat, Adriana. „La dynamique linguistique des relations spatiales en créole réunionnais et sa contribution à la question de l'illettrisme“. Thesis, La Réunion, 2016. http://www.theses.fr/2016LARE0035/document.
Der volle Inhalt der QuelleOur thesis, entitled Linguistic dynamic of spatial relationships in Reunion Creole and its contribution to the illiteracy issue, fits in descriptive linguistic questioning the problematic of spatiality with tools and methods of functional linguistic in dynamic synchrony for Reunion Creole (Martinet : 1989, Staudacher-Valliamée : 1999). Surveys conducted in the field of Reunion Creole speakers gather a corpus of 24 idiolects in a representative sampling including several age groups, geographical locations and difficulty to practice French (official language of the department). Syntactic and prosodic analysis of spatial relationships relies on a sampling of 607 predicative phrases. This thesis establishes the link between spatial relationships, valence program (Tesnière : 1965), word order in predicative structures. The functionalist model is completed by Pottier's general semantic parameters (1992). This thesis brings a new perspective with the identification of the Reunion Creole spatial system, which allows its classification among the framework of verbal and satellite languages (Talmy : 2008). By the place of names, spatial system is rooted in Creole collective memory and Reunion Creole speaker insular History. Oral creole tradition involves specific situations of illiteracy. Our informants demonstrate their analphabetism, illiteracy and their learning difficulties. The didactic and educational fallout from our research contribute to the remediation and tooling for the learning of French spatial system descriptive linguistic
Santin-Janin, Hugues. „Dynamique spatio-temporelle des populations d'un prédateur introduit sur une île sub-antarctique : l'exemple du chat (Felis silvestris catus) sur la Grande Terre de l'archipel des Kerguelen“. Phd thesis, Université Claude Bernard - Lyon I, 2010. http://tel.archives-ouvertes.fr/tel-00811532.
Der volle Inhalt der QuelleHaxhiaj, Lianda. „De la synchronie dynamique : étude expérimentale et modélisation de variables phonético-phonologiques dans un parler régional de l'albanais (ville de Shkodra)“. Strasbourg, 2009. http://www.theses.fr/2009STRA1044.
Der volle Inhalt der QuelleThe thesis addresses the question of linguistic variation and change by examining factors influencing the dynamic emergence of a synchronic state, as well as the mechanisms susceptible to reveal the phonetical and phonological evolutions. On the one hand, this research investigates the impact of natural and functional mechanisms of linguistic variables and on the other hand, it adheres to the post-labovian sociolinguistic perspective. Furthermore, the research conjugates both social and cognitive factors focusing on their interdependence. Correlated to the mathematical data analysis and statistics, this research is based upon the acoustic analysis of three phonological variables of an Albanian regional variety: (1) the vocalic length, (2) the vocalic nasality and (3) the schwa. A series of each variable experimentations put in evidence that phonological changes are governed by a marked tendency of speakers to use the set of resources they have at their disposal for realizing the action of language. These strategies articulate around two fundamental axes: (1) the cognitive and the social and (2) the individual and the group. The proposed linguistic variation model suggests that the innovations or the conservative behaviours can be understood as the demonstration of a tension between internal and external forces mobilizing the individual’s strategies of encoding in an infra-conscious level. In order to investigate the organization of the independent variables an interaction based approach, permitting to consider an important number of social factors, is proposed
Leclère, Chloë. „Interactions précoces mère-enfant en situation de négligence émotionnelle sévère : étude transdisciplinaire de la synchronie et de la mentalisation réflexive maternelle“. Thesis, Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCB196/document.
Der volle Inhalt der QuelleStudying early interaction is complex but essential for understanding psychopathology during infancy. Emotional Neglect is a common but insidious form of child maltreatment. It refers to parental failure to give children an emotional environment that allows adequate psychological, cognitive and physical development. We explore mother-infant interaction in these situations following a transdisciplinary approach which consider Synchrony and Insightfulness. Synchrony is a dynamic and reciprocal adaptation of the temporal structure of behaviour and shared affect between interactive partners. It is regarded as a social signal per se. Insightfulness involves the parents' ability to see things from the child point of view and to empathically think about and consider the motives underlying their childrens' behaviour. The aims of this research are (A) to report a novel method to assess features of interactive behavioral dynamics and (B) to assess/underline the impact of Insighfulness, in particular its dynamics, on interactive behavioral dynamics in case/situations of severe emotional neglect. Mothers and children aged from 13 to 38 months (10 in situation of severe emotional neglect and 10 controls) are video recorded during free play. Features of social signal extract by our automatic computational method are compared to qualitative interaction assessment by using the Coding Interactive Behaviour in its French version (Feldman et Keren 1998; Viaux 2014). Secondly, 14 mothers (7 in situation of emotional neglect and 7 without interaction problem) are interviewed during a video-feedback session by using the Insightfulness Assessment (Oppenheim, Koren-Karie, 2001) to assess Insightfulness. An additional qualitative verbatim analysis was performed to explore intrapsychic dynamics. Self-administered questionnaires (BITSEA and Care Support) are proposed to mothers. Results show that individual and synchrony motion features perfectly correlates CIB composite scores trough maternal sensitivity, intrusivity and dyadic reciprocity. Furthermore, pathological mothers are mostly categorised as non-Insighful. Interviews are characterized by poor representations and a lack of elaboration. Intrapsychic dynamics is partly associated with interactive behavioral dynamics. We conclude that computational method might be promising for future studies. It opens an observation window to understand early interactions by changing the time scale. Moreover, interview with a video support seems to underpin maternal elaboration and enhance an intrapsychic movement
Colombel, Véronique de. „Comparaison des noms et usages de six cents plantes dans le groupes tchadiques des monts du mandara (cameroun) synchronie dynamique et diachronie linguistique et ethnolinguistique“. Paris 5, 2000. http://www.theses.fr/2000PA05H007.
Der volle Inhalt der QuelleYoussi, Abderrahim. „L'arabe marocain médian : analyse fonctionaliste des rapports syntaxiques : de la synchronie dynamique dans les corrélations de normes linguistiques et des formes phonologiques, morphosyntaxiques et lexicales“. Paris 3, 1986. http://www.theses.fr/1986PA030042.
Der volle Inhalt der QuelleFrom a diglossia situation, the linguistic evolution in morocco has developed a variety that functionally and formally is equidistant to moroccan arabic (ma) and to literary Arabic (la). Middle Moroccan Arabic (MMA) is used in formal and official situations, and it introduces a triglossia relationship between ma and la, instating thus a continuum between these two varieties. The thesis analyses this triglossia situation on the basis of the correlations between the new sociocultural norms and the linguistic forms at all levels of analysis, and by reference to the other varieties. The thesis is subdivided into four parts. I) socioculturals aspects : circumscribes the situations of use, the types of speakers, and it puts forward a theorical framework for the sociolinguistic analysis of the dynamic synchrony of language. II) aspects of the phonemics of MMA : sums up the phonic relations, while thoroughly investigating complex or controversial aspects of the phonemics of MMA (vowels, emphatics, labio-velars, etc. ), with special reference to the dynamic synchrony in marocco. III) morphosyntax : is an exhaustive analysis of the phrasal types of MMA on the basis of the co-occurrence rules of syntactic classes and morphonological variations. Many aspects of this analysis are a breakaway from tradition (the classification of verbs, the presentation of modification, etc). IV) Structure of the lexicon : examins the dynamic synchrony of the lexicon particularly in the derivation and compounding processes, and determines the preferential patterns of MMA. Samples of the corpus of data used in the analyses are appended to the theses
Besserve, Michel. „Analyse de la dynamique neuronale pour les Interfaces Cerveau-Machines : un retour aux sources“. Phd thesis, Université Paris Sud - Paris XI, 2007. http://tel.archives-ouvertes.fr/tel-00559128.
Der volle Inhalt der QuellePrepin, Ken. „Développement et modélisation de capacités d’interactions homme-robots : l’imitation comme modèle de communication“. Paris 6, 2008. http://www.theses.fr/2008PA066224.
Der volle Inhalt der QuelleQueriaud, Celia. „Dynamiques d'interventions des ergonomes dans le champ du maintien dans l'emploi de salariés malades chroniques“. Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0332/document.
Der volle Inhalt der QuelleKeeping a chronically ill person at work is a highly complex situation, considering itsimplications in professional, legal, and social implications as well as those related to theprivate sphere. These situations involve a multitude of stakeholders who communicate inmore or less efficient ways. Consultants in ergonomics are occasionally called on to act uponthis multidimensional object that is subject to many contingencies that involve timeconstraints, delays, and unforeseen events. In this research work, we have modelled theprocess of “maintaining in employment” based on the time frames (the window of ergonomicintervention and the episode of “intervention for maintaining in employment”) and the timelapses (the long-term histories of the employee and of the company) involved. Using threemain methods of analysis (self-analysis of interventions, simulations of interventions andobservations of other ergonomists), we were able to characterize the effective and subtlemanagement of temporal aspects by the ergonomist operating within this specific context ofintervention. This management implies specific dynamics of intervention, alternatingprocesses of understanding and action. Ergonomists act in the “here and now”, but also gobeyond the constrained framework of their window of intervention. They aim to gain controlover each of these temporal dimensions, through a process of active construction of theirrepresentations. In order to maintain the workers involved in sustained employment in thebest possible way, they will attempt to reduce, or even prevent the dyschronies betweenthese different dimensions, and to promote constructive connections between them
Elgharib, Ahmed Omar Ahmed. „Différentes stratégies de contrôle pour le système d'éolienne connecté PMSG“. Electronic Thesis or Diss., Aix-Marseille, 2022. http://www.theses.fr/2022AIXM0647.
Der volle Inhalt der QuelleRenewable energy is considered as a viable alternative to conventional fossil fuel generators globally. One of the appealing and promising renewable energy sources is wind energy. This renewable energy source offers an excellent substitute for the generation of traditional electricity. Wind turbines based on PMSG are best suited for stand-alone applications due to their reliability. This research work proposes some efficient control methods associated with wind energy control. It is focused more on the readjustment of some available control approaches as the improvement of NSSFC (nonlinear static state feedback controller) and NDSFC (nonlinear dynamic state feedback controller) to increase the controller performance for such a system. In sequence with that, this work moves forward to another controller(NPIC) which has been added to this system by presenting a sensor-less control technique of direct driven PMSG wind turbine. Afterwards, PI Controller is studied in this work by integrating genetic algorithm that has significant impact on the efficiency and execution of wind turbine applications and their whole system. Model predictive control (MPC) is thelast controller that has been explored. All of these controllers are using PMSG, discussed under different operating ranges of wind speed. Several experimental tests were applied to wide variety of configurations in order to validate the simulation results produced. This research aims to serve as a detailed reference for future studies on the control of wind turbine systems
Mallem, Badis. „Modélisation, analyse et commande des grands systèmes électriques interconnectés“. Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2010. http://tel.archives-ouvertes.fr/tel-00557829.
Der volle Inhalt der QuelleChaumont, Marc. „Représentation en objets vidéo pour un codage progressif et concurrentiel des séquences d'images“. Phd thesis, Université Rennes 1, 2003. http://tel.archives-ouvertes.fr/tel-00004146.
Der volle Inhalt der QuelleMester, Victor. „Conception Optimale Systémique des Composants des Chaînes de Traction Electrique“. Phd thesis, Ecole Centrale de Lille, 2007. http://tel.archives-ouvertes.fr/tel-00160666.
Der volle Inhalt der QuelleLa thèse présente une méthodologie rationnelle pour la conception optimale systémique appliquée à la conception des chaînes de traction électrique. La méthodologie est générale et se base sur l'optimisation sous contraintes. Elle intègre l'utilisation de différents niveaux de granularité au sein du modèle de conception. Une interface a été développée afin d'appliquer aisément cette méthodologie à des cas pratiques variés. Deux objectifs ont été traités, le premier concerne la définition des cahiers des charges des composants, le deuxième concerne la conception détaillée d'un composant de la chaîne de traction en prenant en compte l'ensemble du système. Ces applications mettent en évidence les avantages de la méthodologie proposée et l'importance de l'approche systémique.
Séguin-Godin, Guillaume. „Simulateur matériel à événements discrets de réseaux de neurones à décharges avec application en traitement d’images“. Mémoire, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/10600.
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