Dissertations / Theses on the topic 'Théorie système'
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Reza, M. Germàn A. de la. "Théorie générale des systèmes et intégration latino-américaine : système général rt système spécifique." Toulouse 2, 1993. http://www.theses.fr/1993TOU20026.
Full textThe general objective of our study is to contribute to the epistemological study of multi-state communities in the developing regions. To be more specific, it seeks to establish a basis for a systemic explanation of difficulties involved in the processes of economic integration among countries having mutually weak communications. In order to simplify the argument, we have chosen as principal referent the latin american schemes. The first part is devoted to a discussion on the general systems theory, its antecedents and context, followed by an elucidation of the principal components of the general concept of system. It emphasizes the need of a specific framework for the evaluation of these components. In the next section, we refer to the method of difinition of specific systems, their antecedents and their contemporary manifestations. We have considered the integration agreements in effect in africa, america, asia and europe, and their theoretical foundations. In order to expand on the difficulties encountered in the integration agreements in the third world, particularly in latin america, we have reserved for the last part a fundamental aspect of the integration phenomena : the dominant causality within the schemes. This point is then refered back to the categorie of finality of the general systems theory, sustaining the need of the particular contexts
Peltier, Céline. "Théorie du dumping et système communautaire antidumping." Toulouse 1, 1997. http://www.theses.fr/1997TOU10016.
Full textThe aim of this dissertation is to review the economic explanations of the dumping phenomenon and to analyse the implementation of the antidumping community procedure. The chapter I presents an original typology of dumping. Two principal types of dumping are considered. The discriminatory dumping is practised by a firm of which the national market is less competitive than the domestic market where it exports. The non discriminatory dumping is practised by a firm of which the national market isn't necessary less competitive than the domestic market where it exports. All different motivations which can lead a firm to dump constitute a rational behaviour. However, these doesn't exclude that the firms, victims of these practises, be defended since they suffer an injury. In the chapter II, the two major systems of antidumping defence are described: the United States and the European community procedures. The progress, the necessary conditions for an antidumping defence are described and analyse of their principal results is realised. The chapter III's objective is to appreciate if the European community antidumping decisions are biased. An empirical study is realised with the community antidumping cases during the period 1980-1992. The results are more moderate than the conclusions of previous studies. But, it seems that European firms try to influence the decisions of the commission. Then, the claims of a discretionary implementation of the European community antidumping system, leading this system from defence to protection, don't seem demonstrated. Antitrust policies applied on the national market of the firm which exports can't replace, in any type of dumping, a direct defence against the dumping. But, a parallel implementation in the importing country, in the case where the strengthening of dominant positions in the European community is evident, must be considered
Ait, Mohamed Otmane. "La théorie du π-calcul dans le système HOL." Nancy 1, 1996. http://www.theses.fr/1996NAN10091.
Full textIbn, el Farouk Abdelhamid. "Le système verbal de l'arabe classique, théorie et description." Paris 5, 1994. http://www.theses.fr/1994PA05H102.
Full textOur research, entitled the classical Arabic’s verbal system, theory and description, endeavors to present a functional grammar of classical Arabic’s verbal system. We have managed to distinguish two fundamental classes. The first his three verbal determinants, the future, the potential, and the past, whereas the second only has the perfect. We have also tried to reveal that word order and agreement between subject and personal pronoun operate as functional markers ; thus putting into question the existence of a case system in classical Arabic
Laveau, Stéphane. "Géométrie d'un système de N caméras : théorie, estimation et applications." Phd thesis, Ecole Polytechnique X, 1996. http://tel.archives-ouvertes.fr/tel-00267257.
Full textmême s'agir de caméras différentes. La seule hypothèse est que la scène est rigide.
Haroche, Pierre. "Théorie réaliste de l'intégration européenne : Les conditions de la transformation d'un système international en système interne." Phd thesis, Université Panthéon-Sorbonne - Paris I, 2013. http://tel.archives-ouvertes.fr/tel-00984263.
Full textHaroche, Pierre. "Théorie réaliste de l’intégration européenne : les conditions de la transformation d'un système international en système interne." Thesis, Paris 1, 2013. http://www.theses.fr/2013PA010357/document.
Full textThis thesis proposes a theoretical framework able to account for the transition from an international system to a domestic one. It relies on empirical studies from the history of European integration. Its model is based on two principal factors: the offense-defense balance and the degree of interdependence among actor When offense has the advantage, incentives drive the actors to solve their interdependence problems by usin violence because it is quite effective. It is only when defense has the advantage that interdependence can lead to integration. However, that latter condition is not sufficient. When interdependence is weak, actors see to limit it, to preserve their independence. It is only when defense has the advantage and interdependence is overwhelming and unavoidable, that integration becomes a viable solution. This model was applied to explain the transition from a traditional independence-preserving strategy to a delegation-of-powers policy in favor of supranational institutions, by examining three categories of actors: governments, members of parliaments an judges. The origins of the European Coal and Steel Community (1951) and the failure of the European Defense Corn munit y (1954) were used to investigate governmental integration. The first reinforcements of the European Parliament conceming budgetary (1970) and legislative matters (1986) served to study parliamentary integration. lastly, the analysis of judicial integration was explored through the evolution of German and French national courts towards the aeee tance of the su remac of Communit law
Bagland, Véronique. "Etude mathématique de quelques modèles issus de la théorie cinétique." Phd thesis, Université Paul Sabatier - Toulouse III, 2005. http://tel.archives-ouvertes.fr/tel-00012082.
Full textBoubezoul, Abderrahmane. "Système d'aide au diagnostic par apprentissage : application aux systèmes microélectroniques." Aix-Marseille 3, 2008. http://www.theses.fr/2008AIX30072.
Full textLoonis, Éric. "Théorie générale de l'addiction : du système d'actions à l'écologie de l'action." Toulouse 2, 1999. http://www.theses.fr/1999TOU20005.
Full textThe basic problem addressed by my thesis is epistemological: the generality of the addiction concept and the overabundance of addiction models demand the development of a unifying concept of addiction and a general addiction theory. DSM-IV provides 4 descriptive elements for addiction: antecedent and consequent dysphoria, loss of control, and negative consequences. Clinical practice gives rise to the identification of 7 processes: mental suffering, salience, conflicts, tolerance, withdrawals, relief, and relapse/reinstatement. Neurobiological research, on the other hand, confirms the unified characteristics of addiction. Addictions represent both sensation and cerebral arousal seeking, and a transaction of the individual with his/her environment and his/her self, within the framework of strategies producing less adaptive cost, and with cognitive mechanisms operating to control psychological states. All this work leads us to define a double function, pragmatic and pragmological, for our everyday activities which form, at the pragmological level, a system of actions whose differences provide an explanation of the addiction continuum between every day and pathological addictions. From a population of addicted (n=31) and non-addicted (n=29) individuals, distinguished by ASI criteria, we tested the working hypothesis that some structural and functional characteristics of the activity systems of addicted individuals allow us to infer the characteristics of addictive action systems, and in consequence to link the psychopathological problems of addiction to clinical signs of mental disturbance. We were able to assess actions systems (salience, variety, vicariance, telic dominance) and mental disturbance (anxiety, depression, poor self-esteem, alexithymia). Our results show a significant between-group difference for action systems and mental disturbance, as well as a significant correlation between both groups of variables. We discuss the relevance of an application of the general theory of addictions and the concept of action systems in the framework of a preventive and practical ecology of action
Brevet, Guillaume. "Sur l'irrégularité d'un système différentiel holonome le long d'une courbe plane." Angers, 1999. http://www.theses.fr/1999ANGE0025.
Full textZ. Mebkhout defined the irregularity bundle of a holonomic differential system along an analytic subspace. This object had appeared in the special case of the constitutive module of holomorphic functions on a complex analytic variety, as the obstruction to Grothendieck's comparison theorem, which ultimately translates the regularity of the structural bundle. The irregularity bundle also generalises in higher dimensions the irregularity space of B. Malgrange in the case of one variable. Irregularity bundles have the property of perversity but some perverse bundles are not the irregularity of differential systems. This raises the problem of determining the essential image of the irregularity functor. In this work we study this problem when the hypersurface is a curve embedded in a surface. First, we give a counterexample to the essential subjectivity: we consider the irregularity on the splitting surface of the origin of the plane along the total transform of a curve and we exhibit a perverse beam of direct non-perverse image. We then prove, using the desingularisation of a plane curve, that the irregularity restricted to the seed of an irreducible blunt curve provides an essentially surjective functor to local systems on the blunt curve. We also compute precisely the cohomology bundles of the irregularity of certain d-modules of the exponential type along a normal crossing. These calculations allow us to find differential systems such that the monodromy of the associated local system has as eigenvalues the roots of unity. Finally, we show the following result: the irregularity along a smooth curve seed is an essentially surjective functor with values in the seeds of monodromic perverse bundles. The proof of this theorem relies on the category equivalence between monodromic perverse bundles and a category of diagrams of finite dimensional vector spaces. In the latter category, the indecomposable objects are known. All the work consists therefore in reaching them, which is done by unscrewing arguments by exploiting the exactness of the irregularity functor
Paulin-Mohring, Christine. "Définitions Inductives en Théorie des Types." Habilitation à diriger des recherches, Université Claude Bernard - Lyon I, 1996. http://tel.archives-ouvertes.fr/tel-00431817.
Full textAssem, Ali. "Vibrations mécaniques et non linéaires : théorie de l'index pour des systèmes gyroscopiques." Paris 9, 1987. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1987PA090080.
Full textAlaimi, Mohamed. "Théorie des zones cibles de change et crédibilité du système monétaire européen." Paris 2, 2002. http://www.theses.fr/2002PA020030.
Full textPansard, Fabrice. "Théorie et applications des zones cibles : le cas du système monétaire européen." Nice, 1997. http://www.theses.fr/1997NICE0010.
Full textPlanckeel, Frédéric. "Indisponibilités et théorie du droit : contribution à la redéfinition du système juridique." Lille 2, 2004. http://www.theses.fr/2004LIL20009.
Full textThe nature of such established institutions as clauses of inalienability or public domain inalienability is still an enigma. This is due to the incompatibility of inalienabilities with the traditionnal foundations of property law. So it is out of the theory of law that a summa divisio can be observed whereas objective inalienability directly relate to the objective property, wich is assigned to its proprietor even towards third parties, subjective inalienability abolish only the power of the proprietor. These two models allow us not only to develop for the first time a general theory of inalienabilities, but also to show the essence of fundamental concepts of subjective property, objective property, legal capacity, personal right and real right. These concepts even prove to be in the heart of a logical and universal system : it transcends the legal system, while making up its technical substance, specified according to the own principles of every State. This setting of legal system to equation invites to reconsider all the technical concepts, and paves the way for a theoretical unification of the diverse national systems
Bru, Marc. "Vers une théorie du système enseignement-apprentissage : de la pratique aux modèles." Toulouse 2, 1987. http://www.theses.fr/1987TOU20079.
Full textSeparately considered, teached knowledges, teaching methods and learning behaviors can't account for the specificity and the complexity of the pedagogic situations, built up on scientific and too punctual data base or inversly on too general paradigms, available theories don't arrive to remove a double confusion : confusion among theorization levels, confusion among normative prescriptive function and descriptive explanatory function of the research. Reflexion-controlled on a singular itinerary linking the practice to the research, a critical review from works realized by different authors shows it's necessary to give itself new theorectic means. If the didactic research is interested in the study of teaching act in its relation to the learning act, a theory of teaching learning must be built up. Then the proposition of a systemic model is formulated. This theoretic support notably imposes the renunciation of the teaching method notion for the benefit of the one of didactic variety. The latter allows to study how teaching can be an answer to subjective and objective needs of students
Perret, Cécile. "Théorie du capital humain versus théorie du signal : application à la réforme du système éducatif chilien dans les années 80." Clermont-Ferrand 1, 1998. http://www.theses.fr/1998CLF10201.
Full textDuring the 80’s, a radical reform of the Chilean educational system was implemented. It was aimed at: (I) the decentralization and autonomy of schools and (II) the professionalization of the teachers. In the first part of this thesis we analyze the consequences of this reform inside the educational system and we give evidence for: (I) a geographical and social stratification of result and (II) a deterioration of the quality of secondary education. In the second part, we show that since this institutional reform (in the context of dictatorship) the return to investment in education has decreased. We try to interpret this fact using the classical tools of labor market: human capital theory and signal theory. With pseudo panel datas extracted from “la encuesta occupational de la universidad de Chile », we show, with a mincerian function, that today no compensatory diferentials seem to explain the level of salaries
Diaz, Gladys. "Conception de messagerie pour systèmes multimédia coopératifs : application au système de télémédecine DIATELIC." Vandoeuvre-les-Nancy, INPL, 2000. http://www.theses.fr/2000INPL063N.
Full textMarché, Claude. "Réécriture modulo une théorie présentée par un système convergent et décidabilité des problèmes du mot dans certaines classes de théories equationnelles." Paris 11, 1993. http://www.theses.fr/1993PA112312.
Full textLazrag, Ayadi. "Théorie de contrôle et systèmes dynamiques." Thesis, Nice, 2014. http://www.theses.fr/2014NICE4060/document.
Full textThis thesis is devided into three parts. In the first part we begin by describing some well known results in geometric control theory such as the Chow Rashevsky Theorem, the Kalman rank condition, the End-Point Mapping and the linear test. Moreover, we define and study briefly local controllability around a reference control at first and second order. In the second part we provide an elementary proof of the Franks lemma for geodesic flows using basic tools of geometric control theory. In the last part, given a compact Riemannian manifold, we prove a uniform Franks' lemma at second order for geodesic flows and apply the result in persistence theory. In this part we introduce with more details notions of local controllability at first and second order. In fact, we provide a second order controllability result whose proof is long and technical
Corbineau, Pierre. "Démonstration automatique en théorie des types." Paris 11, 2005. http://www.theses.fr/2005PA112149.
Full textAmong software designed to help formal reasoning, there are automated theorem provers and interactive proof assistants. The former are specialized tools using technics that differ from traditionnal reasoning methods, but they have a very limited range. The latter have a wider range but theii users must specify explicitly every proof step. Automation of proofs is tricky in these latter tools because they use expressive logical systems. This thesis is build around three contributions in this field. First, we present an extension of congruence-closure the a theory of constructors with partial application. An algorithm to solve this problem is described and studied. Then, we build a first-order formalism including connectives defined as non-recursive inductive types similar to those in the Calculus of Inductive Constructions. We present a new contraction-free sequent calculus for first-order intuitionistic logic that is adapted to this formalism, and we prove its fundamental properties: contraction- and cut-elimination. We derive a semi-decision procedure from these results. Those two contributions are implemented inside the Coq proof assistant; the third one is the description of a methode allowing the interpretation of first-order proof tree into Type Theory by computational reflection. This paradigm is applied to propositionnal logic and is used by a decision procedure inside the Coq system. This method is also adapted to first-order logic with equality and allows to check proofs obtained by ordered completion in the CiME system
Klay, Francis. "Unification dans les théories syntaxiques." Nancy 1, 1992. http://www.theses.fr/1992NAN10331.
Full textDuroux, Patrice. "Un système formel pour la décidabilité dans la théorie des catégories cartésiennes fermées." Montpellier 2, 1999. http://www.theses.fr/1999MON20224.
Full textBonnabel, Silvère. "Observateurs asymptotiques invariants : théorie et exemples." Phd thesis, École Nationale Supérieure des Mines de Paris, 2007. http://pastel.archives-ouvertes.fr/pastel-00004868.
Full textBouri, Mounia. "L'explication dans les systèmes experts : étude synthétique et extension au raisonnement incertain, le système SERIN." Toulouse 3, 1990. http://www.theses.fr/1990TOU30236.
Full textSalmoni, Rebecca. "Sur une sinthèse optimale pour un système quantique à deux niveaux." Paris 11, 2007. http://www.theses.fr/2007PA112332.
Full textChibani, Omar. "Simulation du transport de particules (photons, électrons et positrons) : le système GEPTS." Toulouse 3, 1994. http://www.theses.fr/1994TOU30090.
Full textBarboucha, Mohamed. "Modélisation structurale des systèmes complexes, extraction et validation des règles d'un système expert." Lille 1, 1987. http://www.theses.fr/1987LIL10098.
Full textDeplagne, Eric. "Système de preuve modulo récurrence." Nancy 1, 2002. http://docnum.univ-lorraine.fr/public/SCD_T_2002_0240_DEPLAGNE.pdf.
Full textMethods and systems for proof by induction are very different. The most general methods are difficult to automatize. Automated systems are sometimes difficult to justify. This thesis establishes at proof level a link between noetherian induction and induction bt rewriting, which will enable systems to cooperate in a skeptical mode in which the proof is verified thanks to the Curry-Howard isomorphism. The formalism of deduction modulo is extended to conditional congruences which are evaluated with respect to a context. Moreover,the induction ordering, which cannot be compatible with the congruence, is made protective, which means that it blocks the application of the congruence. Proof by induction by rewriting is seen as the result of the internalization of induction hypotheses in deduction modulo, which enables to explain some of the behavior of the induction by rewriting method
Meyer, Christophe. "Le système doctrinal des aliments : contribution à la théorie générale de l'obligation alimentaire légale." Paris 10, 2003. http://www.theses.fr/2003PA100159.
Full textHistorians of national lega1 systems are often, by and large, balkanized. They study, explain. And trace the history of their own legal systems ; and though they may speak about learned law, it's only with a cursory nod in the direction of the Jus commune. An approach method of this kind cannot be appropriated for such a question as the alimenta ex lege. Actually, every contemporary legal system knows a maintenance institution, with quite the same structure. Not only for those legislations with strong roman tradition, like the French one, but also in common law and even in the former and actual socialist systems. This study will show that the legal duty of maintenance is in fact moved by the essential idea of an interpretation of the debt in fovorem : in favour of the existence of the debt, of it's execution or of the fastness of the execution. This consideration could explain most part of the very special characters of this institution. The same way that it could explain why the modern doctrine remains quite confused when it deals with this institution. It seams that the modern lawyers misunderstood the meaning of maintenance, because they misread the leaned law treaties and mingled the roman obligatio naturalis of maintenance with a modern civilian obligation
Coutte, Alexandre. "Implications d'une conception de l'attention comme système sensorimoteur multimodal." Nice, 2011. http://www.theses.fr/2011NICE2010.
Full textAmong theoretical models dealing with the influence of motor processes on attentional orientation, premotor attention theory (Rizzolatti and Craighero, 1998) assumes that orienting attention toward an object is underlain by the processes allowing to reach this object. This work aims at examining this approach’s theoretical and heuristic implications by articulating it to the thematic fields of the link between perception and action, the sensorimotor couples coordination and the space construction. We carried out six experiments based on the motor-visual priming paradigm. The goal was to study the influence of a reach preparation (manual or ocular) on performances (response times, responses accuracy rates, ocular movements) in simultaneously realized target search tasks (visual or tactile). Our results show that the beginning of a visual target search is influenced by both the direction of the simultaneously prepared manual reach and the manual laterality of participants. This influence of the prepared manual reach varies according to the behavioral sequence in which this manual reach takes place, and according to the target saliency : an attentional and/or ocular capture disrupts the effect of the manual preparation. Symmetrically, our results also show that the tactile search performances are influenced by the direction of a simultaneously prepared ocular saccade. All these effects are observed without any spatial overlapping between the prepared movement’s destination and the target’s location. Generally speaking, the studies presented in this thesis underline the necessity of considering the concept of attention in a sensori-motor way that brings up the question of the dynamic coupling between action and perception
Cuénin, Tidiane. "Une méthodologie de prédiction des performances d'un système d'impression." Paris 6, 2010. http://www.theses.fr/2010PA066160.
Full textDodane, Olivier. "Théorèmes de Petri pour les courbes stables et dégénérescence du système d'équations du plongement canonique." Strasbourg, 2009. https://publication-theses.unistra.fr/public/theses_doctorat/2009/DODANE_Olivier_2009.pdf.
Full textPetri's theorem states that the canonical image of a nonhyperelliptic smooth curve of genus g>=4 defined over an algebraically closed field is an intersection of quadrics and cubics. Moreover, one can exhibit a system of equations for this image. These results are due to Petri (1923) and were generalized and transcribed in modern language by Saint-Donat (1973). The moduli space of smooth curves is not proper and can be completed by adding stable curves. It is therefore natural to search for generalizations of Petri's theorem for stable curves and to examine questions of degeneracy. In this thesis, we consider on the one hand the case of a stable curve with one singular point and whose normalization is hyperelliptic, and on the other hand the case of a stable curve whose graph is planar. Moreover, we undertake the canonical embedding of a stable curve defined over a discrete valuation ring. The general method consists in: -- describing the canonical sheaf and constructing a well adapted basis for the space of its global sections; -- constructing quadrics and cubics in the canonical ideal; -- proving that these equations generate the canonical ideal. The text also contains new biographical indications concerning the german mathematician Karl Petri. [http://tel. Archives-ouvertes. Fr]
Buisson, Jean-Christophe. "TOULMED, un générateur de systèmes-experts qui prend en compte l'imprécision et l'incertitude des connaissances : développement du système DIABETO pour l'aide aux soins des diabétiques." Toulouse, INPT, 1987. http://www.theses.fr/1987INPT048H.
Full textLique, François. "Excitation collisionnelle de molécules d'intérêt astrophysique : théorie et interprétation d'observations." Paris 6, 2006. https://tel.archives-ouvertes.fr/tel-00172004.
Full textNguyen, Xuan Son. "Etude du comportement critique à l'aide de la théorie des champs conformes : des systèmes désordonnés aux systèmes couplés." Paris 6, 2003. http://www.theses.fr/2003PA066238.
Full textCartigny, Pierre. "Bifurcation d'orbites périodiques d'un système hamiltonien au voisinage d'une position d'équilibre." Lyon 1, 1985. http://www.theses.fr/1985LYO11633.
Full textCuenot, Jean-Baptiste. "Système optoélectronique de communication sécurisé par chaos en longueur d'onde." Besançon, 2002. http://www.theses.fr/2002BESA2003.
Full textFianyo, Yawa Edem. "Couplage de modèles à l'aide d'agents : le système OSIRIS." Paris 9, 2001. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2001PA090019.
Full textDebaillon, Pierre. "Système de modélisation de l'enfoncement dynamique des bateaux." Compiègne, 2005. http://www.theses.fr/2005COMP1566.
Full textThe aim of the thesis is to present a tool to be able to calculate ship squat. It consists of an association of three numerical models in finite elements, reproducing the process of the phenomenon. A first model calculates the pressure field, function of the ship speed. Then a second model, with this pressure field, moves the vessel following a force and momentum result. The last model updates the mesh for a new cycle. The system is running as long as the equilibrium model moves the vessel
Mokhtari, Amine. "Système personnalisé de planification d'itinéraire unimodal : une approche basée sur la théorie des ensembles flous." Rennes 1, 2011. http://www.theses.fr/2011REN1E004.
Full textBisquert, Pierre. "Étude du changement en argumentation : de la théorie à la pratique." Toulouse 3, 2013. http://thesesups.ups-tlse.fr/2272/.
Full textArgumentation, in the field of artificial intelligence, is a formalism allowing to reason with incomplete and/or contradictory information as well as to model an exchange of arguments between several agents. An argumentation system usually consists of a set of arguments interacting with each other, and from which it is possible to extract one or several consistent points of view. In this thesis, we are mainly concerned with the abstract argumentation in which arguments are handled as abstract entities whose meaning is unknown and in which the interactions represent conflicts. This allows us to focus on the particular point of the dynamics in abstract argumentation systems, that is to say the changes that could impact these systems, particularly in the context of a dialogue. We start with justifying the interest of such a formal framework, then we study the how and the why of change in abstract argumentation. The how is tackled by establishing a list of changes that an argumentation system can undergo and by studying the conditions under which they may occur. The why is addressed by introducing the notion of goal motivating a change and by choosing the best change to make in order to satisfy a goal, taking into account constraints on the agent to convince. Finally, we make our study concrete by proposing a tool that implements the concepts introduced and we study its performance
Doumbouya, Mamadou Bilo. "Système d'argumentation pour la collaboration en télémédecine." Thesis, Toulouse 1, 2016. http://www.theses.fr/2016TOU10030/document.
Full textTelemedicine involves the practice of medical procedures remotely through the use of new information and communications technology. Among these medical procedures, we looked at the tele-expertise which is a kind of collaborative activity consisting of collecting the opinions of medical experts facing a particular health problem. In our work, we have chosen to model these collaborative activities by Dung argumentation system based on mathematical foundations and illustrates the interactions between the different stakeholders and at the same time provides mathematical tools decisions. We opted for a semantic modeling with conceptual graphs as one of our objectives is to ensure semantic interoperability. This modeling can often include inconsistencies (poor relations of attacks in argumentation system) which will be verified by the use of constraints in conceptual graphs. To solve these inconsistency problems, two major solutions have been proposed : (i) the weight of the arguments of different health professionals, (ii) modeling some aspects of medical law as constraints. This work demonstrates a computer application of logical reasoning in a judicial medical setting where it sheds light on the verification of information, argumentation and interaction. It aims to ensure good cooperation in order to guard against possible financial and legal consequences
Jarrín, Oscar. "Descriptions déterministes de la turbulence dans les équations de Navier-Stokes." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLE010/document.
Full textThis PhD thesis is devoted to deterministic study of the turbulence in the Navier-Stokes equations. The thesis is divided in four independent chapters.The first chapter involves a rigorous discussion about the energy's dissipation law, proposed by theory of the turbulence K41, in the deterministic setting of the homogeneous and incompressible Navier-Stokes equations, with a stationary external force (the force only depends of the spatial variable) and on the whole space. The energy's dissipation law, also called the Kolmogorov's dissipation law, characterizes the energy's dissipation rate (in the form of heat) of a turbulent fluid and this law was developed by A.N. Kolmogorov in 1941. However, its deduction (which uses mainly tools of statistics) is not fully understood until our days and then an active research area consists in studying this law in the rigorous framework of the Navier-Stokes equations which describe in a mathematical way the fluids motion and in particular the movement of turbulent fluids. In this setting, the purpose of this chapter is to highlight the fact that if we consider the Navier-Stokes equations on the whole space then certain physical quantities, necessary for the study of the Kolmogorov's dissipation law, have no a rigorous definition and then to give a sense to these quantities we suggest to consider the Navier-Stokes equations with an additional damping term. In the framework of these damped equations, we obtain some estimates for the energy's dissipation rate according to the Kolmogorov's dissipation law.In the second chapter we are interested in study the stationary solutions of the damped Navier-Stokes introduced in the previous chapter. These stationary solutions are a particular type of solutions which do not depend of the temporal variable and their study is motivated by the fact that we always consider the Navier-Stokes equations with a stationary external force. In this chapter we study two properties of the stationary solutions: the first property concerns the stability of these solutions where we prove that if we have a control on the external force then all non stationary solution (with depends of both spatial and temporal variables) converges toward a stationary solution. The second property concerns the decay in spatial variable of the stationary solutions. These properties of stationary solutions are a consequence of the damping term introduced in the Navier-Stokes equations.In the third chapter we still study the stationary solutions of Navier-Stokes equations but now we consider the classical equations (without any additional damping term). The purpose of this chapter is to study an other problem related to the deterministic description of the turbulence: the frequency decay of the stationary solutions. Indeed, according to the K41 theory, if the fluid is in a laminar setting then the stationary solutions of the Navier-Stokes equations must exhibit a exponential frequency decay which starts at lows frequencies. But, if the fluid is in a turbulent setting then this exponential frequency decay must be observed only at highs frequencies. In this chapter, using some Fourier analysis tools, we give a precise description of this exponential frequency decay in the laminar and in the turbulent setting.In the fourth and last chapter we return to the stationary solutions of the classical Navier-Stokes equations and we study the uniqueness of these solutions in the particular case without any external force. Following some ideas of G. Seregin, we study the uniqueness of these solutions first in the framework of Lebesgue spaces of and then in the a general framework of Morrey spaces
Allombert, Bill. "Théorie de Galois effective pour les corps de nombres et les corps finis : Développement du système PARI." Bordeaux 1, 2001. http://www.theses.fr/2001BOR12450.
Full textNguema, Ndong Florent. "Étude de la dynamique symbolique des développements en base négative, système de Lyndon." Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT2276/document.
Full textThis work deals with the study of the Lyndon systems (for alternate order) and the symbolicdynamics of the expansions of real numbers in negative base. For a given real ß > 1, we showthe intrinsic ergodicity of the —ß-shift using a positive recurring prefix code and we determine theassociated zeta function. We study the conditions for which the —ß-shift admits the specificationproperty.Moreover, when ß is less than golden ratio, the language of the —ß-shift contains intransitive words.These words lead to some cylinders negligible with respect to the measure with maximal entropy.In the interval Iß=[—ß/(ß+1),1/(ß+1)[, these cylinders correspond to some gaps: small interval withmeasure zero (with respect to the unique ergodic measure on Iß). We make a detailed study ofthese gaps.Otherwise, we study the uniqueness of the number systems of integers in negative base and weshow that to each Lyndon word corresponds to a such system
Ausfelder, Christian. "Contribution à la conception d'un système de conduite pour les systèmes flexibles de production manufacturière : modélisation et validation de la commande." Lille 1, 1994. http://www.theses.fr/1994LIL10058.
Full textGicquel, Nathalie. "Application de l'étude des bifurcations en dynamique chaotique à un système de transmission numérique de signaux." Toulouse, INSA, 1995. http://www.theses.fr/1995ISAT0025.
Full textPoitrineau, Karine. "Evolution de la résistance aux ennemis naturels et intéractions multiples : théorie et système biologique drosophiles-parasitoi͏̈des." Montpellier 2, 2004. http://www.theses.fr/2004MON20016.
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