Tesi sul tema "Théorie des correspondances"
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Guillaume, Clément. "Foncteurs de correspondances généralisées". Thesis, Amiens, 2019. http://www.theses.fr/2019AMIE0015.
Testo completoIn recent works, Serge Bouc and Jacques Thévenaz studied correspondence functors, that is, representations of the category of correspondences. The objets of this category are finite sets, and arrows from X to Y are subsets of the cartesian product Y.x.X. These arrows can also be seen as maps from Y.x.X to the boolean lattice. Replacing the boolean lattice by any finite distributive lattice T, we get the notion of generalized T-valued correspondence functor. Their study is very fruitful : according to a methodology which has proved its efficiency, we first study simple functors. They are parametrized in terms of presheaves of finite posets. This parametrization has several interesting consequences, namely results of finite generation and stabilization for generalized correspondence functors. We also study pseudo-simple functors, and we give a conjecture, verified in several particular cases, fully describing pseudo-simple functors in terms of T-modules. We deduce of this conjecture a description of simple functors. The results of this thesis naturally generalize those of Serge Bouc and Jacques Thévenaz
Dawson, Alain. "Variation phonologique et cohésion dialectale en picard : vers une théorie des correspondances dialectales". Toulouse 2, 2006. http://www.theses.fr/2006TOU20058.
Testo completoThrough the example of the Picard language I explore the phonological mechanisms which ensure dialectal cohesion within a language, in the framework of Optimality Theory and Correspondence Theory. The core part of my research deals with palatalization of velar stops, which induces a complex dialectal alternation in Picard. I first examine the extralinguistic factors of cohesion, then I propose an OT analysis based upon the hypothesis of generative dialectology: dialectal cohesion is due to the existence of common underlying forms. This approach, however, fails to explain certain cases of opacity. In the framework of Correspondence Theory, I propose a new type of correspondence between varieties in contact. Dialectal cohesion is grounded in both perception and production. I also test this approach in a surface-only phonology to solve another case of variation in Picard: vowel-zero alternation
Domenach, Florent. "Structures latticielles, correspondances de Galois contraintes et classification symbolique". Paris 1, 2002. http://www.theses.fr/2002PA010020.
Testo completoXu, Daxin. "Correspondances de Simpson p-adique et modulo pⁿ". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS133/document.
Testo completoThis thesis is devoted to two arithmetic variants of Simpson's correspondence. In the first part, I compare the p-adic Simpson correspondence with a p-adic analogue of the Narasimhan-Seshadri's correspondence for curves over p-adic fields due to Deninger and Werner. Narasimhan and Seshadri established a correspondence between stable bundles of degree zero and unitary representations of the topological fundamental group for a complex smooth proper curve. Using parallel transport, Deninger and Werner associated functorially to every vector bundle on a p-adic curve whose reduction is strongly semi-stable of degree 0 a p-adic representation of the fundamental group of the curve. They asked several questions: whether their functor is fully faithful; whether the cohomology of the local systems produced by this functor admits a Hodge-Tate filtration; and whether their construction is compatible with the p-adic Simpson correspondence developed by Faltings. We answer positively these questions. The second part is devoted to the construction of a lifting of the Cartier transform of Ogus-Vologodsky modulo pⁿ. Let W be the ring of the Witt vectors of a perfect field of characteristic p, X a smooth formal scheme over W, X' the base change of X by the Frobenius morphism of W, X'_2 the reduction modulo p² of X' and Y the special fiber of X. We lift the Cartier transform of Ogus-Vologodsky relative to X'_2 modulo pⁿ. More precisely, we construct a functor from the category of pⁿ-torsion O_{X'}-modules with integrable p-connection to the category of pⁿ-torsion O_X-modules with integrable connection, each subject to a suitable nilpotence condition. Our construction is based on Oyama's reformulation of the Cartier transform of Ogus-Vologodsky in characteristic p. If there exists a lifting F: X -> X' of the relative Frobenius morphism of Y, our functor is compatible with a functor constructed by Shiho from F. As an application, we give a new interpretation of relative Fontaine modules introduced by Faltings and of the computation of their cohomology
Yazigi, Mohand Amokrane. "Applications a seuils et applications galoisiennes : recherche des irreductibles dans leurs treillis". Paris, EHESS, 1998. http://www.theses.fr/1998EHES0014.
Testo completoGalois mappings between two ordered sets are those which belong to galois connections. Under fairly general assumptions, threshold mappings are restrictions of galois ones. They constitute a class of mappings useful for the modelization of dissimilarities and other types of valued objects. The purpose of this thesis is the study of threshold mappings and ordered sets of threshold mappings. After defining threshold mappings, we give their main properties and establish their strong relation with galois connections. If both considered ordered sets p and q are complete lattices, and g is a join-generating subset of p, then, the set s(g,q) of threshold mappings is still a complete lattice. We are particularly concerned with the study of irreducible elements of the (finite) lattice s(jp,q) when both lattices p and q are finite and jp is the set of join-irreducible elements of p. We firstly consider the lattice of antitone mappings from jp to q, and characterize their join- and meet- irreducible elements. We determine the join-irreducible elements of s(jp, q) and observe that they are identical to those of the set of antitone mappings. Finally, we determine a class of meet-irreducible elements of s(jp, q), including all those the image of which has cardinality at most two. We show that other meet-irreducible elements may exist, except when one of the lattices p or q is distributive
Renault, Jean-Baptiste. "Théorie et esthétiques de la métaphore : la métaphore et son soupçon, entre correspondances et dissemblances, métaphores linguistiques et iconiques". Phd thesis, Université de la Sorbonne nouvelle - Paris III, 2013. http://tel.archives-ouvertes.fr/tel-00916648.
Testo completoChapdelaine, Philippe. "Contribution à la théorie de la complexité algorithmique : problèmes de contraintes, complétude et résultats de classification, complexité structurelle". Caen, 2004. http://www.theses.fr/2004CAEN2042.
Testo completoLaïchour, Hakim. "Modélisation multi-agent et aide à la décision : application à la régulation des correspondances dans les réseaux de transport urbain". Lille 1, 2002. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2002/50376-2002-309-310.pdf.
Testo completoMenares, Ricardo. "Nombres d'intersection arithmétiques et opérateurs de Hecke sur les courbes modulaires". Phd thesis, Université Paris Sud - Paris XI, 2008. http://tel.archives-ouvertes.fr/tel-00360171.
Testo completoCette thèse s'inscrit dans l'étude des opérateurs de Hecke en tant que correspondances sur les courbes modulaires X_0(N). D'une part, nous étudions la relation entre l'algèbre de Hecke et la théorie d'Arakelov; d'autre part, nous entreprenons un début d'étude de la dynamique de l'action des opérateurs de Hecke sur l'ensemble des courbes elliptiques supersingulières.
On considère la courbe modulaire X_0(N) munie de la métrique de Poincaré (métrique hyperbolique). Cette métrique présente des singularités aux points elliptiques et pointes. On suppose que N est sans facteurs carrés. On note XN le modèle entier de cette courbe donné par l'interprétation modulaire étudiée par Deligne et Rapoport. On définit un groupe de Chow arihmétique généralisé CH(N) tel que ses éléments sont représentés par des couples (D,g) avec D un diviseur de Weil sur XN et g un courant de Green admissible pour la métrique de Poincaré. J.-B. Bost et U. Kühn ont développé, de manière indépendante, des généralisations de la théorie d'intersection arithmétique d'Arakelov qui fournissent une forme bilinéaire à valeurs réelles sur CH(N) x CH(N) dans ce cadre où la métrique est singulière. On étudie aussi une version à coefficients réels et à équivalence numérique près de CH(N), que l'on note CH(N)*.
Nous montrons dans cette thèse que les correspondances de Hecke agissent sur CH(N) et que cette action est autoadjointe par rapport à la forme bilinéaire de Bost-Kühn. Ceci permet de diagonaliser cette action sur CH(N)* et de définir ses sous-espaces propres. Ensuite nous étudions le faisceau dualisant relatif, considéré comme un élément de CH(N)*, ainsi que sa décomposition selon les sous-espaces propres. Nous calculons l'auto-intersection de la composante propre correspondante à la pointe à l'infini en utilisant des résultats d'Ulf Kühn.
L'action des opérateurs de Hecke sur les fibres spéciales de XN définit une dynamique qui preserve les points supersinguliers. Nous nous intéressons à étudier cette action sur les points supersinguliers des fibres de bonne réduction et nous calculons, à l'aide des résultats de Deuring et Eichler, la fréquence asymptotique avec laquelle un point supersingulier donné visite un autre point du même type.
Badran, Hussein. "Contribution à la mesure en analyse factorielle des données et applications". Aix-Marseille 3, 2001. http://www.theses.fr/2001AIX30035.
Testo completoThis thesis presents under a same cover a certain number of articles and studies that are regrouped into two parts. The first part, mostly theoretical, concerns some studies in the framework of factorial analysis. In the beginning several questions related to probability distribution functions appearing in factorial analysis are considereed, mainly about the evaluation and characterization of missing data. Then new results are given on projective transformations that allow to approach probability laws on compact sets. Finally another result on measureness (under the meaning of a given mass distribution) of two complementary subsets of convex sets defined by hyperplanes going through the gravity center. The second part aims at presenting a certain number of applications of Correspondence Factorial Analysis showing the diversity of concrete problems that can be invoked. It offers results of many studies conducted in France as in Lebanon in the framework of several researches that have facilitated the discovery of new information in very different sectors from experimental sciences going from earth science to economical, political and social sciences
Shadchin, Sergey. "Sur quelques aspects de correspondance entre la théorie des cordes et théorie de jauge". Phd thesis, Ecole Polytechnique X, 2005. http://pastel.archives-ouvertes.fr/pastel-00002311.
Testo completoGiecold, Gregory. "Correspondance AdS/CFT et théories des champs à fort couplage". Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112075.
Testo completoIn this thesis, we apply the gauge/string duality in its supergravity limit to infer some properties of field theories at strong coupling. Experiments at RHIC and at the LHC indeed suggest that the quark--gluon plasma behaves as one of the most perfect fluid ever achieved in any controlled experimental setup. Perturbative approaches fail at accounting for its properties, whereas lattice QCD methods face technical as well as conceptual difficulties in computing dynamical aspects of this new state of matter. As a result, the AdS/CFT correspondence currently is the best tool at our disposal for analytically modelling this phase of QCD. One of the contributions of this thesis amounts to deriving a stochastic Langevin equation for a heavy quark moving across a maximally supersymmetric Yang--Mills plasma at strong coupling. Even though this theory seems to describe in a surprisingly satisfactory way the high--energy, deconfined phase of QCD, it is also of much interest to try and search for a string theory dual making closer contact with QCD at lower energies. As such, the other main focus of this thesis deals with supergravity solutions of lesser supersymmetry, without conformal invariance and exhibiting confinement. We build for the first time the gravity dual to metastable states of such theories. In particular, we find the contribution from anti--branes to the inflation potential in some general scenario of string cosmology
Le, Floch Bruno. "Correspondance AGT pour les opérateurs de surface". Thesis, Paris, Ecole normale supérieure, 2015. http://www.theses.fr/2015ENSU0008/document.
Testo completoThe sphere partition function of two-dimensional supersymmetric gauge theories with four supercharges is computed exactly using supersymmetric localization. For some gauge theories, explicit expressions are found to match with correlators in the two-dimensional Toda conformal field theory. This fits into the AGT correspondence, which relates supersymmetric fourdimensionalgauge theories with eight supercharges to correlators in the Toda theory. More precisely, the two-dimensional gauge theories can be inserted along a surface in a four-dimensional theory, thus forming half-BPS surface operators: such an insertion corresponds to the addition of a particular local operator (a degenerate vertex operator) in the Toda correlator.This enriched correspondence has several consequences. On the one hand, symmetries of Toda correlators imply analogues of Seiberg and Kutasov–Schwimmer dualities for two-dimensional gauge theories with four supercharges. On the other hand, exact gauge theory results yield previously unknown data in the Toda theory. This leads to a concrete proposal for the Toda braiding kernel of two semi-degenerate vertex operators, which holds important information about four-dimensional S-duality
Kontoudi, Konstantina. "Hydrodynamique et intrication dans la correspondance AdS/CFT". Phd thesis, Ecole Normale Supérieure de Paris - ENS Paris, 2013. http://tel.archives-ouvertes.fr/tel-00923581.
Testo completoGromov, Nikolay. "Integrabilité dans la Correspondance AdS/CFT:l'analyse quasiclassique et l'approche de bootstrap". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2007. http://tel.archives-ouvertes.fr/tel-00286218.
Testo completoLengrand, Stéphane. "Normalisation & Equivalence en Théorie de la Démonstration & Théorie des Types". Phd thesis, Université Paris-Diderot - Paris VII, 2006. http://tel.archives-ouvertes.fr/tel-00134646.
Testo completoLa première partie est intitulée Termes de Preuve pour la Logique Intuitioniste Implicationnelle, avec des contributions en déduction naturelle et calcul des séquents, normalisation et élimination des coupures, sémantiques en appel par nom et par valeur. En particulier elle introduit des calculs de termes de preuve pour le calcul des séquents depth-bounded G4 et la déduction naturelle multiplicative. Cette dernière donne lieu à un calcul de substitutions explicites avec affaiblissements et contractions, qui raffine la beta-réduction.
La deuxième partie, intitulée Théorie des Types en Calcul des Séquents, développe une théorie des Pure Type Sequent Calculi, équivalents aux Systèmes de Types Purs mais mieux adaptés à la recherche de preuve.
La troisième partie, intitulée Vers la Logique Classique, étudie des approches à la Théorie des Types classique. Elle développe un calcul des séquents pour une version classique du Système Fomega. Une approche à la question de l'équivalence de preuves classiques consiste à calculer les représentants canoniques de preuves équivalentes dans le cadre du Calcul des Structures.
Nguyen, Van Thé Lionel. "Théorie de Ramsey structurale et applications en dynamique topologique via la correspondance de Kechris-Pestov-Todorcevic". Habilitation à diriger des recherches, Aix-Marseille Université, 2013. http://tel.archives-ouvertes.fr/tel-00924106.
Testo completoDospinescu, Gabriel. "Actions infinitésimales dans la correspondance de Langlands locale p-adique". Phd thesis, Palaiseau, Ecole polytechnique, 2012. https://pastel.hal.science/docs/00/72/53/70/PDF/these_dospinescu.pdf.
Testo completoThe topic of this thesis is the p-adic Langlands correspondence, imagined by Breuil and established by Colmez for GL_2(Q_p). Let L be a finite extension of Q_p and let V be an irreducible, two-dimensional L-representation of the absolute Galois group of Q_p. Using Fontaine's theory of (phi,Gamma)-modules, Colmez associates to V a GL_2(Q_p)-Banach space representation Pi(V), which is unitary, admissible and topologically irreducible. We give a new proof, much easier, of a theorem of Colmez, which describes the locally analytic vectors Pi(V)^an of Pi(V) in terms of the overconvergent (phi,Gamma)-module attached to V. The main result of this thesis is a simple description of the infinitesimal action of GL_2(Q_p) on Pi(V)^an. In particular, we show that Pi(V)^an has an infinitesimal character, which can be computed in terms of the Hodge-Tate weights of V, answering therefore a question of Harris. We show that there is no p-adic analogue of a classical theorem of Saito and Tunnell, answering another question of Harris. We extend results of Colmez concerning the Kirillov model of the U-finite vectors of Pi(V) (U is the upper unipotent of GL_2(Q_p)). Combining this study with the description of the infinitesimal action, we obtain a simple proof of one of the main results of Colmez, characterizing the representations V such that Pi(V) has nonzero locally algebraic vectors. This result is the first step in making the connection with the classical Langlands correspondence, and it is also a key ingredient in Emerton's proof of the Fontaine-Mazur conjecture in dimension two. We extend our methods to prove the analogous result for infinitesimal deformations of V. This answers a question of Paskunas and has applications to the Breuil-Mézard conjecture. We apply differential methods to study the Jacquet module of Pi(V)^an, proving for instance that it is nonzero if and only if V is trianguline and giving a new and direct proof of conjectures of Berger, Breuil and Emerton. Finally, in joint work with Benjamin Schraen we prove Schur's lemma for topologically irreducible Banach and locally analytic representations of p-adic Lie groups. This basic result was previously known only for commutative Lie groups and for GL_2(Q_p)
Dospinescu, Gabriel. "Actions infinitésimales dans la correspondance de Langlands locale p-adique". Phd thesis, Ecole Polytechnique X, 2012. http://pastel.archives-ouvertes.fr/pastel-00725370.
Testo completoTrias, Justin. "Correspondance thêta locale ℓ-modulaire". Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS380.
Testo completoLet F be a local non archimedean field of characteristic not 2 and residual characteristic p. The local theta correspondence over F gives a bijection between some subsets of irreductible smooth complex reprensentations of a first reductive group H and a second reductive group H0, where (H,H0) is a dual pair in a symplectic group. Let R be a field of characteristic ℓ different from p. In this thesis, we give minimal conditions on R so thatStone-von Neumann’s theorem can be generalised in the setting of modular representation theory, which means when the coefficient field is R. This generalisation enables to define a modular Weil representation which verifies analogous properties to that of the complex case [MVW87]. When R is algebraically closed, we generalise the proof of the classical correspondence for non quaternionic dual pairs [GT16] under two assumptions. Firstly,the characteristic ℓ has to be greater than a certain explicit bound which depends on the pro-orders of H1 and H2. The second hypothesis have a deep connection to the theory of intertwining and would result from a better understanding of that theory in the modular setting
Maatouk, Hassan. "Correspondance entre régression par processus Gaussien et splines d'interpolation sous contraintes linéaires de type inégalité. Théorie et applications". Thesis, Saint-Etienne, EMSE, 2015. http://www.theses.fr/2015EMSE0791/document.
Testo completoThis thesis is dedicated to interpolation problems when the numerical function is known to satisfy some properties such as positivity, monotonicity or convexity. Two methods of interpolation are studied. The first one is deterministic and is based on convex optimization in a Reproducing Kernel Hilbert Space (RKHS). The second one is a Bayesian approach based on Gaussian Process Regression (GPR) or Kriging. By using a finite linear functional decomposition, we propose to approximate the original Gaussian process by a finite-dimensional Gaussian process such that conditional simulations satisfy all the inequality constraints. As a consequence, GPR is equivalent to the simulation of a truncated Gaussian vector to a convex set. The mode or Maximum A Posteriori is defined as a Bayesian estimator and prediction intervals are quantified by simulation. Convergence of the method is proved and the correspondence between the two methods is done. This can be seen as an extension of the correspondence established by [Kimeldorf and Wahba, 1971] between Bayesian estimation on stochastic process and smoothing by splines. Finally, a real application in insurance and finance is given to estimate a term-structure curve and default probabilities
Brousseau, Guy. "Théorisation des phénomènes d'enseignement des mathématiques". Habilitation à diriger des recherches, Université Sciences et Technologies - Bordeaux I, 1986. http://tel.archives-ouvertes.fr/tel-00471995.
Testo completoRabaud, Christophe. "Une nouvelle approche de mise en correspondance stéréoscopique dense par méthodes possibilistes". Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2005. http://tel.archives-ouvertes.fr/tel-00262287.
Testo completoWoronow, Ilona. "L'idée de la correspondance des arts dans la théorie et la pratique de l'art des jardins (1760 à 1808)". Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENL028.
Testo completoThe art of gardens in France (1760-1808): Correspondence of arts in theory and practice. Classical thinkers understand the plural artistic realm to be a dense network of correspondences, where the rich experience of the culture of time (of cultivating time) yields a high potential. Having renounced to search through their works for harbingers of modern art (brilliant genius, invention, creativity, originality), we concentrate more on another aspect of classical aesthetics which focuses on the resistance of matter to form – execution, the act of doing and duration. Considering mimesis as an equivalence between poiesis and aisthesis, classical thinkers maintain that artistic experience owes its unfolding, its inflections and its quality to the chosen medium or media. Be it potentially or concretely, the diversity of the art realm necessarily conditions every artistic experience. Whether it be stimulating of disturbing, the intermediation of allogenic registers – as regards both the contemplation of an art work and the definition of an art form – becomes a necessary detour, a coherence mechanism, recalcitrant to any systemization. This view of the arts inspired public and artist imagination from the Renaissance to the end of the XVIIIth century, finding in garden literature a particularly fertile ground. During the XVIIIth century, classicism begins to be questioned : a new epistemological tendency, coupled with the growing autonomy of the aesthetic experience, results in the ordering of seemingly chaotic interdisciplinary relations. Assessments, imperatives and portrayed experience make for an ambiguous response. As a result, garden theory reduces the scope of its references to the “liberal” arts, ascribing to each interdisciplinary alliance a particular function. This new approach enjoys considerable success, permeating public opinion and triggering an aesthetic debate never before seen in garden history. Nevertheless, conceptualizing a correspondence between the arts meets with difficulty: homogenizing and the unifying the plural domain of the arts. Presenting the garden as the source of “all of the arts” aims to prevent one single discipline from monopolizing it. All in all, torn between the subject as unifier and the desire to retain the multiplicity of the arts, the enlightenment philosophers invent a way to manage plurality that we call “contained dissipation.” Interdisciplinary detours are paths to knowledge specific to culture, operating in the multiple realm of the arts. In the context of the garden, this indirect semiosis is radicalized. Differences between objects thus acquire simple differential values. In an artistic composition whose existence is defined by its display vis-à-vis unpredictable and contingent factors, logic based on identity and opposition is inoperable. Through contiguity and resemblance, art values are displaced form one object to another: the principal residence radiates, transmitting its architectural order to the surrounding beds, the painting transfers pictorial qualities to its in situ copy, the factory harboring a figure takes on its sculptural traits, and so on. By uniting "all" of the arts in a garden enclosure, enthusiasts of the latter endow it with a material which makes it possible to perpetuate this semiosis infinitely. Classical gardens are not conceived to contibute new knowledge, but rather to enquire into the experience brought about by its acquisition. The succession of "contained" disciplinary blunders transforms the reading of the garden into an erudite “art of promenading” : at work is a cognitive mindset composed of prepared intellectual and bodily comportments whose paradoxical goal is to achieve relaxation and naturalness
Juteau, Daniel. "Correspondance de Springer modulaire et matrices de décomposition". Phd thesis, Université Paris-Diderot - Paris VII, 2007. http://tel.archives-ouvertes.fr/tel-00355559.
Testo completoCollier, Olivier. "Méthodes statistiques pour la mise en correspondance de descripteurs". Phd thesis, Université Paris-Est, 2013. http://tel.archives-ouvertes.fr/tel-00904686.
Testo completoCharbonnier, Laurent. "Localisation d'un robot mobile par mise en correspondance de cartes télémétriques : utilisation du concept de ressemblance". Montpellier 2, 1996. http://www.theses.fr/1996MON20098.
Testo completoAmer, Asmaa. "Resource Allocation in NOMA-based cellular networks". Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASG089.
Testo completoThis thesis aims to optimize resources allocation within NOMA systems, particularly downlink cooperative NOMA systems, within single-antenna and multiple antenna base station (BS) configurations. This aims to maximize spectral and energy efficiency, and to propose more efficient NOMA schemes that can reap benefits of NOMA and address the limitations of currently considered NOMA schemes, in terms of power consumption and receiver complexity. In the first contribution, a network-slicing-based cooperative NOMA based system is investigated to accommodate both cellular users and device-to-device (D2D) pairs with enhanced mobile broadband (eMBB) and Ultra reliable low latency communication (URLLC) services requirements. The optimization problem is formulated as sum-throughput maximization with three optimization variables: NOMA-users clustering, underlying D2D- admission, and resource blocks (RBs) allocation. The problem is decoupled into three sub-problems. A sequential algorithmic solution is proposed, starting by users clustering, followed by RBs allocation, and finally D2D admission. The users clustering and D2D admission sub-problems are solved using low-complexity many-to-one matching theory solution. The RBs allocation problem is solved using heuristics approach. In the second contribution, we revisit the trade-off between user access and the successive interference cancellation (SIC) complexity of NOMA receivers. As more users share the same resources, interference and SIC complexity escalate. Unlike conventional pairing-based NOMA schemes, we propose an overlapping cooperative NOMA scheme where each cell-edge user can share resources with multiple cell-center users, even if cell-center users are using orthogonal resources between each other. This approach enhances user connectivity, improves cell-edge user performance, and maintains low SIC complexity. The problem is formulated as maximization of Quality-of-Service (QoS) satisfaction of cell-edge users, and is solved using a many-to-many matching theory algorithm with swapping and add/remove strategies. In the third thesis contribution, we propose a hybrid Space Division Multiple Access (SDMA)/NOMA system, to adapt the multiple access mode, either NOMA or SDMA, based on the power consumption. In the power consumption model, unlike NOMA literature, where power induced by SIC units at the receiver is overlooked, we introduce dynamic power consumption model based on the SIC power. The problem is formulated as maximizing energy efficiency by optimizing the multiple access mode selection, BS beamforming, and user power allocation. This approach prevents overestimation of energy efficiency, consequently, avoids gaps between its theoretical evaluation and practical system design, an aspect particularly critical for energy-constrained NOMA devices. The problem is solved using successive convex approximation (SCA), difference of convex (DC) programming and semidefinite programming (SDP) approaches
Skordas, Thomas. "Mise en correspondance et reconstruction stéréo utilisant une description structurelle des images". Phd thesis, Grenoble INPG, 1988. http://tel.archives-ouvertes.fr/tel-00329721.
Testo completoSlimane, Mohammed. "Le langage des gractes et son usage fondamental en algèbre en logique et dans la théorie des bases de données relationnelles". Paris 5, 1986. http://www.theses.fr/1986PA05S008.
Testo completoKhouzeimi, Sami. "L'Interaction épistolaire au XVIIIe siècle. Etude réalisée à partir de trois dialogues épistolaires : Etude réalisée à partir de trois dialogues épistolaires : Voltaire & Mme du Deffand, Jean-Jacques Rousseau & Malesherbes, Benjamin Constant & Isabelle de Charrière. Théorie et pratique de l'épistolaire au XVIIIe siècle". Electronic Thesis or Diss., Orléans, 2013. http://www.theses.fr/2013ORLE1126.
Testo completoOur work has the aim to describe the process of interaction in the eighteenth century epistolary through the study of three examples of epistolary dialogues, namely: Voltaire ---- Madame du Deffand, Rousseau and Malesherbes ---- finally Benjamin Constant ---- Isabelle de Charrière. We understand the interaction epistolary the back-and-forth between the two parties, their mutual influence, their trade roles. The main question thatarises here is: what is the interest for the two parties, this epistolary exchange in the long term? For what purpose is the two letter writers they write to each other? How epistolary dialogue can it change the image of the other, the structure and the moral?The eighteenth century saw a proliferation epistolary actually thanks to the development of philosophicalthought and the Enlightenment. It tasted like the epistolary exchange that affects all areas of life, especially among friends. So many businesses are built correspondence, some of which develop into networks. For Voltaire and Madame Du Deffand their epistolary follows a binary rhythm, usually smooth, but sometimes"syncopated" as a philosophical dialogue dazzling until the disappearance of Voltaire. In this dialogue, w ediscover the days many ideas and themes that inform us about a time excellently. Correspondence of Rousseau and Malesherbes us about minute details related to the problems of publication and censorshipworks, not to mention the personal side of their friendship, but is rather based on a kind of desire loyalty and commitment vision in the exchange of secrets, essential characteristics denominations which Rousseau has accustomed us. As Benjamin Constant and Isabelle de Charrière, their dialogue, despite the age difference between partners, seems very interesting content. If Constant likes to describe Isabelle de Charrière the circumstances of his life in a subsidiary, an interest, a passion sustained emerges in this correspondence
Inyang, Enobong. "Étude des conceptions théoriques de deux traductologues anglophones, Peter Newmark et Eugène Nida, à la lumière de la théorie interprétative de la traduction". Phd thesis, Université de la Sorbonne nouvelle - Paris III, 2010. http://tel.archives-ouvertes.fr/tel-00915762.
Testo completoDuboeuf, Bastien. "Compactification Kaluza-Klein, Géométrie Exceptionnelle et Holographie". Electronic Thesis or Diss., Lyon, École normale supérieure, 2024. http://www.theses.fr/2024ENSL0028.
Testo completoString Theories are our most promising candidates in the goal of unifying all interactions in nature. Gravity is naturally encapsulated in all String Theories, which are ultraviolet-free from divergences. A general feature of String Theories is the number of spacetime dimensions required. This number is either 26 or 10. In any case, this requires some further modifications of the theories since the world we are living in is a priori a 4-dimensional spacetime space. One way to tackle this problem is via so-called Kaluza-Klein compactifications. The latter is a process in which some of the dimensions of the total space are made compact and small. The idea is that at our macroscopic scale and daily energy level, the effects of those "extra" dimensions are sufficiently small so we can ignore them. In this thesis we will be interested in Supergravities, obtained from a certain regime of String Theories. In those theories, additional symmetries show up in dimensional compactifications, which allow us to reformulate Supergravities into so-called Exceptional Field Theories. Let us finally remark that Supergravities are particularly important in the context of the AdS/CFT correspondence, stating the equivalence between a theory of gravity, here a Supergravity defined on an Anti-de-Sitter (AdS) background, and a Quantum Field Theory, here a Conformal Field Theory living on the boundary of the AdS previous spacetime. In the first part of the thesis, we will make general comments and use it to introduce various concepts needed throughout the thesis. In the second part of the thesis, we will show how to use Exceptional Field Theory tech- niques to compute spectra of solutions of 11-dimensional Supergravity on AdS₄ × Σ⁷ . After reviewing the state-of-the-art techniques for Kaluza-Klein spectroscopy, we will show how Exceptional Field Theory techniques can be extended to spaces with the condition of Generalized parallelizability. We will illustrate how this technology works in the case of AdS₄ × S⁷squashed solution of 11- dimensional Supergravity, for which we give a complete answer for the spectrum. We will then show a concrete realization of the AdS₄/CFT₃ correspondence, by computing the domain-wall solution of the Supergravity equations interpolating between the round and the squashed seven- sphere, which is dual to a Renormalization Group flow on the Conformal Field Theory side. This demonstrates that not only Exceptional Field Theory techniques can be used to compute spectra around Supergravities with AdS background, but it also allows us to compute quadratic couplings of Kaluza-Klein fluctuations around a domain-wall solution of Supergravity. Finally, in the last section of the thesis, we will be interested in n-point couplings in Super- gravities. In a first part, we will show how to compute cubic couplings for specific fields on AdS₅ background of IIB 10-dimensional Supergravity via a brute force calculation. After discussing the achievements made using these techniques, we will show how we can use Exceptional Field Theory techniques to efficiently compute these couplings. Not only will this prove more efficient, but it will also allow us to write the same couplings in a more compact form, to derive formulas that apply to any vacua that are Leibniz parallelizable, and also to reveal Exceptional Field Theory structures that prove long-standing conjectures. We will illustrate the power of these techniques on the example of AdS₅ background of IIB 10-dimensional Supergravity
Khouzeimi, Sami. "L'Interaction épistolaire au XVIIIe siècle. Etude réalisée à partir de trois dialogues épistolaires : Etude réalisée à partir de trois dialogues épistolaires : Voltaire & Mme du Deffand, Jean-Jacques Rousseau & Malesherbes, Benjamin Constant & Isabelle de Charrière. Théorie et pratique de l'épistolaire au XVIIIe siècle". Phd thesis, Université d'Orléans, 2013. http://tel.archives-ouvertes.fr/tel-00965108.
Testo completoInyang, Enobong Joseph. "Étude des conceptions théoriques de deux traductologues anglophones, Peter Newmark et Eugène Nida, à la lumière de la théorie interprétative de la traduction". Thesis, Paris 3, 2010. http://www.theses.fr/2010PA030161/document.
Testo completoThe aim of our dissertation is to examine the literalist theoretical view of Peter Newmark and the sociolinguistic theoretical view of Eugene Nida in the light of the interpretative theory of translation of Danica Seleskovitch and Marianne Lederer. Newmark and Nida are Anglophone theorists of translation, while Seleskovitch and Lederer are French theorists. We want to see how three theories from different linguistic worlds developed in the second part of the 20th century and at the same time compare and contrast them
Prouff, Antoine. "Correspondance classique-quantique et application au contrôle d'équations d'ondes et de Schrödinger dans l'espace euclidien". Electronic Thesis or Diss., université Paris-Saclay, 2024. https://theses.hal.science/tel-04634673.
Testo completoWave and Schrödinger equations model a variety of phenomena, such as propagation of light, vibrating structures or the time evolution of a quantum particle. In these models, the high-energy asymptotics can be approximated by classical mechanics, as geometric optics. In this thesis, we study several applications of this principle to control problems for wave and Schrödinger equations in the Euclidean space, using microlocal analysis.In the first two chapters, we study the damped wave equation and the Schrödinger equation with a confining potential in the euclidean space. We provide necessary and sufficient conditions for uniform stability in the first case, or observability in the second one. These conditions involve the underlying classical dynamics which consists in a distorted version of geometric optics, due to the presence of the potential.Then in the third part, we analyze the quantum-classical correspondence principle in a general setting that encompasses the two aforementioned problems. We prove a version of Egorov's theorem in the Weyl--Hörmander framework of metrics on the phase space. We provide with various examples of application of this theorem for Schrödinger, half-wave and transport equations
Noyrit, Florian. "Conception dirigée par les modèles à l’aide de langages de modélisation hétérogènes : application aux profils UML". Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112224.
Testo completoThe various stakeholders who describe study and implement a complex system require viewpoints that are dedicated to their concerns. However, in the context of Model-Driven Engineering, approaches to define and implement those viewpoints are either too rigid and inappropriate or completely ad hoc. In addition, those various viewpoints are rarely independent from each other. Therefore, we must strive to identify and describe the relationships/correspondences between the viewpoints in order to be able to verify that the parts of the solution given by the various stakeholders form a consistent whole.The work presented in this thesis provides a way to define dedicated languages based on UML for the viewpoints. For this, a method that analyzes the semantics of the textual descriptions of the concepts of the domain we want to map to UML has been implemented to facilitate the definition of UML profiles. The results we get on the concrete test cases we considered are encouraging and go beyond results of existing tools. To define a viewpoint based on some UML profiles, this thesis provides a method that lets the methodologist make explicit the viewpoint he/she wants. A tool can then generate the tooling that implements this viewpoint in a modeling environment together with the corresponding dedicated language while current practice is based on an implementation essentially manual.To assist the identification of relationships between the viewpoints, this thesis proposes again to analyze the semantics of textual descriptions of concepts of the languages used by the viewpoints. Used in combination with existing syntactic heuristics, the proposed approach provides good results when the terminologies of the languages that are analyzed are far apart. A theoretical framework based on category theory is provided to make explicit formally correspondences. To use this framework, a category for languages based on UML has been proposed. To be able to make explicit the correspondences between the models of those languages as well, the category of OWL ontologies is used. A solution is proposed to characterize correspondences that are more complex than the simple equivalence relationship. This theoretical framework provides a way to define formally complex relationships that can be used to verify the consistency of the architectural description. Once the description of the architecture has been integrated according to the formal correspondences, the issue of consistency is considered. The experiments carried out on a concrete test case to verify consistency on a syntactic perspective give satisfactory practical results. The experiments carried on the same test case to verify consistency on a semantic perspective don’t give satisfactory practical results
Vrain, Christel. "Un outil pour la généralisation utilisant systématiquement les théorèmes : le système OGUST". Paris 11, 1987. http://www.theses.fr/1987PA112302.
Testo completoBensrhair, Abdelaziz. "Contribution à la réalisation d'un capteur de vision 3D par stéréovision passive : mise au point d'algorithmes rapides et auto-adaptatifs de mise en correspondance d'images stéréoscopiques". Rouen, 1992. http://www.theses.fr/1992ROUES019.
Testo completoFrittella, Sabine. "Monotone Modal Logic and Friends". Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4751/document.
Testo completoThe present thesis focuses on Monotone Modal Logic and closely related logics from the point of view of Correspondence Theory and Proof Theory.The first part of the thesis establishes a formal connection between algorithmic corre- spondence theory and certain dual characterization results for finite lattices, similar to Nation's characterization of a hierarchy of pseudovarieties of finite lattices progressively generalizing finite distributive lattices. This formal connection is established through monotone modal logic. Specifically, we adapt the correspondence algorithm ALBA to the setting of monotone modal logic, and we use a certain duality-induced encoding of finite lattices as monotone neighbourhood frames to translate lattice terms into formulas in monotone modal logic.The second part of the thesis extends the theory of display calculi to Baltag-Moss- Solecki's logic of Epistemic Actions and Knowledge (EAK), Monotone Modal Logic (MML), and Propositional Dynamic Logic (PDL). Our results include several cut-elimination metatheorems, which generalize the original metatheorem of Belnap in different and mutually independent dimensions. The two main generalizations of display calculi treated in the thesis are: the generalization from single type to multi-type languages, and from the full or relativized display property to no display property
Butin, F. "Structures de Poisson sur les Algèbres de Polynômes, Cohomologie et Déformations". Phd thesis, Université Claude Bernard - Lyon I, 2009. http://tel.archives-ouvertes.fr/tel-00444232.
Testo completoNtokos, Praxitelis. "Flux backgrounds, AdS/CFT and Generalized Geometry". Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066206/document.
Testo completoThe search for string theory vacuum solutions with non-trivial fluxes is of particular importance for the construction of models relevant for particle physics phenomenology. In the framework of the AdS/CFT correspondence, four-dimensional gauge theories which can be considered to descend from N = 4 SYM are dual to ten- dimensional field configurations with geometries having an asymptotically AdS_5 factor. In this Thesis, we study mass deformations that break supersymmetry (partially or entirely) on the field theory side and which are dual to type IIB backgrounds with non-zero fluxes on the gravity side. The supergravity equations of motion constrain the parameters on the gauge theory side to satisfy certain relations. In particular, we find that the sum of the squares of the boson masses should be equal to the sum of the squares of the fermion masses, making these set-ups problematic for phenomenology applications. The study of the supergravity duals for more general deformations of the conformal field theory requires techniques which go beyond the standard geometric tools. Exceptional Generalized Geometry provides a very elegant way to incorporate the supergravity fluxes in the geometry. We study AdS_5 backgrounds with generic fluxes preserving eight supercharges and we show that these satisfy particularly simple relations which admit a geometrical interpretation in the framework of Generalized Geometry. This opens the way for the systematic study of supersymmetric marginal deformations of the conformal field theory in the context of AdS/CFT
Nguyen, Vu-Lan. "Polymères dirigés en milieu aléatoire : systèmes intégrables, ordres stochastiques". Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC097.
Testo completoThe thesis focuses on (mostly 1 + 1 dimensional) directed polymers in random media. These are classical and celebrated models in the statistical mechanics of disordered systems and describe a one dimensional interface interacting with a d + 1-dimensional random environment where it is immersed. A very important question is to understand, in the limit where the polymer's length tends to infinity and for a typical realization of the environment, the geometric properties of the polymer: typical transversal displacement of the endpoint and its fluctuations, polymer localization at strong disorder around typical tubes determined by disorder. . . A strictly related problem of great interest is to study the fluctuations of the free energy. The main focus is on the so-called log-gamma polymer. This model, introduced by Seppalainen, is obtained by making a specific choice for the disorder law: the random variables are inverse Gamma variables. For this specific disorder choice, he proved that the variance of the log of the partition function is of order N"2/3, as expected by KPZ theory. This was refined into a full limit theorem Tracy -Widom type fluctuations) by Corwin, O'Connell, Seppalainen and Zygouras, via an explicit formula for the Laplace transform of a single partition function. It was until now an open problem to compute correlations between partition functions with different end-points and to study the asymptotic distribution of the polymer's endpoint. The present thesis addresses, among others, these two very challenging problems. On the other hand, we consider applications of stochastic orders on the study of directed polymer and disordered systems
Banafsheh, Farang-Hariri. "La correspondance de Howe géométrique modérément ramifiée pour les paires duales de type II dans le cadre du programme de Langlands géométrique". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00743280.
Testo completoRoyer, Emilien. "Etude de la confusion des descripteurs locaux de points d'intérêt : application à la mise en correspondance d'images de documents". Thesis, Toulon, 2017. http://www.theses.fr/2017TOUL0009/document.
Testo completoThis work tries to establish a bridge between the field of classical computer vision and document analysis and recognition. Specificaly, we tackle the issue of keypoints detection and associated local features computation in the image. These are not suitable for document images since they were designed for real-world images which have different visual characteristic. Our approach is based on resolving the issue of reducing the confusion between feature vectors since they usually lose their discriminant power with document images. Our main contribution is an algorithm reducing the confusion between local features by filtering the ones which present a high confusing risk. We are tackling this by using tools from probability theory. Such a method allows us to apply features extraction algorithms without having to modify them, thus establishing a bridge between these two worlds
Jiang, Yunfeng. "Three-point functions in N=4 Super-Yang-Mills theory from integrability". Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066395.
Testo completoThis thesis is devoted to the study of three-point functions of N=4 Super-Yang-Mills (SYM) theory in the planar limit by using integrability. N=4 SYM theory is conformal invariant at quantum level and is believed to be completely solvable. By the AdS/CFT correspondence, it is dual to the type IIB superstring theory on the curved background AdS5×S5. The three-point functions are important quantities which contain essential dynamic information of the theory.The necessary tools in integrability and the existing methods of computing three-point functions are reviewed. We compute the three-point functions in the higher rank SU(3) sector and obtain a determinant representation for one special configuration, which allows us to take the semi-classical limit. By exploring the relation between long-range interacting spin chain and inhomogeneous XXX spin chain, we develop a new approach to compute three-point functions in the SU(2) sector at one-loop and obtain a compact result. In the Frolov-Tseytlin limit, this result matches the result at strong coupling.We also explore new formulations of the three-point functions. In one formulation inspired by the light-cone string field theory, we constructed the spin vertex, which is the weak coupling counterpart of the string vertex for all sectors at tree level. Another formulation which is related to the form factor boostrap program in integrable field theory is reviewed. At weak coupling, we study the finite volume dependence of a special type of three-point functions which are related to the diagonal form factors
Doumerc, Yan. "Matrices aléatoires, processus stochastiques et groupes de réflexions". Toulouse 3, 2005. http://www.theses.fr/2005TOU30121.
Testo completoThe following thesis falls into three parts. Although they are all closely related to random matrix theory, each of these possesses its own particular concern. The first part deals with some of the existing links between eigenvalues of Gaussian random matrices, non-colliding processes and the Robinson-Schensted-Knuth correspondence. The second part tackles the subject of extensions to symmetric matrices of some classical one-dimensional diffusion processes, namely the Bessel squared processes and the Jacobi processes. Then, the third part hinges round the exit time of Brownian motion from regions which are the fundamental domains associated with finite or affine reflection groups in Euclidian space
Mauguière, Frédéric. "Etude de la dynamique vibrationnelle de molécules triatomiques par les orbites périodiques et leurs bifurcations à partir de modèles effectifs et ab initio : états excités et effets de substitutions isotopiques". Reims, 2009. http://theses.univ-reims.fr/exl-doc/GED00001115.pdf.
Testo completoThis thesis work is devoted to vibrational dynamics of triatomic molecules nucleus. For this problem we have a double approach. First, we make quantum calculations by variational, DVR and contact transformations methods. Then we use nonlinear dynamics methods to interpret quantum results. The first part recalls some mathematics about dynamical systems and bifurcation theory. A review of the problem of vibrations in molecular physics is also given. The second part concerns dynamics of vibration with effective models. These models consist of effective hamiltonians built by contact transformations methods. A correspondence principle is used to obtain classical hamiltonians and then make a periodic orbit analysis. These periodic orbits are systematically compared with quantum wave functions. Finally, the last part discusses the dynamics of vibration directly from the potential energy surface. We lead quantum variational and DVR calculations with large basis. The study of periodic orbits brings to light the quantum results. In a first time we are interested in C2v symmetry group molecules. Then we are interested in isotopic substitions who break the symmetry from C2v to Cs
Di, Ubaldo Gabriele. "Modern Techniques in Gravity and the Structure of Holographic Conformal Field Theories". Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP055.
Testo completoWe introduce a framework for quantifying random matrix behavior of 2d CFTs and AdS3 quantum gravity. We present a 2d CFT trace formula, precisely analogous to the Gutzwiller trace formula for chaotic quantum systems, which originates from the SL(2, Z) spectral decomposition of the Virasoro primary density of states. An analogy to Berry's diagonal approximation allows us to extract spectral statistics of individual 2d CFTs by coarse-graining, and to identify signatures of chaos and random matrix universality. This leads to a necessary and sufficient condition for a 2d CFT to display a linear ramp in its coarse-grained spectral form factor. Turning to gravity, AdS3 torus wormholes are cleanly interpreted as diagonal projections of squared partition functions of microscopic 2d CFTs. The projection makes use of Hecke operators. The Cotler-Jensen wormhole of AdS3 pure gravity is shown to be extremal among wormhole amplitudes: it is the minimal completion of the random matrix theory correlator compatible with Virasoro symmetry and SL(2, Z)-invariance. We call this MaxRMT: the maximal realization of random matrix universality consistent with the necessary symmetries. Completeness of the SL(2,Z) spectral decomposition as a trace formula allows us to factorize the Cotler-Jensen wormhole, extracting the microscopic object ZRMT(τ) from the coarse-grained product. This captures details of the spectrum of BTZ black hole microstates. ZRMT(τ) may be interpreted as an AdS3 half-wormhole. We discuss its implications for the dual CFT and modular bootstrap at large central charge
Atohoun, Béthel Christian A. R. K. "Architecture logique d'un système multi agents de suivi multi caméra distribué : exploitation du modèle de croyance transférable". Thesis, Littoral, 2013. http://www.theses.fr/2013DUNK0373/document.
Testo completoThis thesis presents the joint use of the theory of evidence and multiple hypothesis tracking for modeling and managing a system for monitoring multiple cameras in a motorway. The tracking is based on the re-identification of objects (vehicles) on the basis of visuals and times informations. A realization of these concepts results in the design and implementation of a software architecture for multiple agents management of multiple camera tracking system. After presenting the state of the art on the frameworks of uncertainty management and that on information fusion for the matching, and the multi-agent systems, our contribution in this work is on two or three levels. The first was an adaptation of the decision phase of the transferable belief model to incorporate the use of multi-hypotheses tracking as a tool of ambiguity survey in case of indecision in matching situation. The second contribution was a proposition of agent-based software architecture for management of a multiple cameras tracking system. We have proposed the global system modeling as well as agents and their interactions modeling using a personal analysis method but nevertheless inspired by modelisation languages and tolls such as Agent UML, MaSE and others, because there is not yet a standard and normalized tool on the subject. Our third contribution was to begin an implementation of our agent-based software architecture using JADE (Java Agent Development Framework). Some experiment and discussions are presented at the end to lead to our conclusions and perspectives