Dissertations / Theses on the topic 'Relational calculi'
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Zhou, Y. "A graphical calculus : extension, implication and application." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365370.
Full textRoocks, Patrick [Verfasser], and Bernhard [Akademischer Betreuer] Möller. "Relational and Algebraic Calculi for Database Preferences / Patrick Roocks. Betreuer: Bernhard Möller." Augsburg : Universität Augsburg, 2016. http://d-nb.info/1112465863/34.
Full textYang, Liqun. "Logical relation categories and lambda calculi." Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/9876.
Full textInants, Armen. "Qualitative calculi with heterogeneous universes." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAMO10/document.
Full textQualitative representation and reasoning operate with non-numerical relations holding between objects of some universe. The general formalisms developed in this field are based on various kinds of algebras of relations, such as Tarskian relation algebras. All these formalisms, which are called qualitative calculi, share an implicit assumption that the universe is homogeneous, i.e., consists of objects of the same kind. However, objects of different kinds may also entertain relations. The state of the art of qualitative reasoning does not offer a combination operation of qualitative calculi for different kinds of objects into a single calculus.Many applications discriminate between different kinds of objects. For example, some spatial models discriminate between regions, lines and points, and different relations are used for each kind of objects. In ontology matching, qualitative calculi were shown useful for expressing alignments between only one kind of entities, such as concepts or individuals. However, relations between individuals and concepts, which impose additional constraints, are not exploited.This dissertation introduces modularity in qualitative calculi and provides a methodology for modeling qualitative calculi with heterogeneous universes. Our central contribution is a framework based on a special class of partition schemes which we call modular. For a qualitative calculus generated by a modular partition scheme, we define a structure that associates each relation symbol with an abstract domain and codomain from a Boolean lattice of sorts. A module of such a qualitative calculus is a sub-calculus restricted to a given sort, which is obtained through an operation called relativization to a sort. Of a greater practical interest is the opposite operation, which allows for combining several qualitative calculi into a single calculus. We define an operation called combination modulo glue, which combines two or more qualitative calculi over different universes, provided some glue relations between these universes. The framework is general enough to support most known qualitative spatio-temporal calculi
Diepenveen, Emily. "Relational models of the lambda calculus." Thesis, University of Ottawa (Canada), 2008. http://hdl.handle.net/10393/27679.
Full textLegrand, Rémi. "Calcul relationnel et programmation en logique." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37607205b.
Full textLegrand, Rémi. "Calcul relationnel et programmation en logique." Paris 6, 1987. http://www.theses.fr/1987PA066481.
Full textYemane, Kidane. "Relations in Models of Calculi and Logics with Names." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6245.
Full textRuoppolo, Domenico. "Relational graph models and Morris's observability : resource-sensitive semantic investigations on the untyped λ-calculus." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCD069/document.
Full textThis thesis is a contribution to the study of Church’s untyped λ-calculus, a term rewritingsystem having the β-reduction (the formal counterpart of the idea of execution of programs) asmain rule. The focus is on denotational semantics, namely the investigation of mathematical models of the λ-calculus giving the same denotation to β-convertible λ-terms. We investigate relational semantics, a resource-sensitive semantics interpreting λ-terms as relations,with their inputs grouped together in multisets. We define a large class of relational models,called relational graph models (rgm’s), and we study them in a type/proof-theoretical way, using some non-idempotent intersection type systems. Firstly, we find the minimal and maximal λ-theories (equational theories extending -conversion) represented by the class.Then we use rgm’s to solve the full abstraction problem for Morris’s observational λ-theory,the contextual equivalence of programs that one gets by taking the β-normal forms asobservable outputs. We solve the problem in different ways. Through a type-theoretical characterization of β-normalizability, we find infinitely many fully abstract rgm’s, that wecall uniformly bottomless.We then give an exhaustive answer to the problem, by showing thatan rgm is fully abstract for Morris’s observability if and only if it is extensional (a model of ŋ-conversion) and λ-König. Intuitively an rgm is λ-König when every infinite computable tree has an infinite branch witnessed by some type of the model, where the witnessing is a property of non-well-foundedness on the type
Jason, Ludovic. "Relation endommagement perméabilité pour les bétons : application aux calculs de structures." Nantes, 2004. http://www.theses.fr/2004NANT2078.
Full textThe relation between damage and permeability is of great importance to evaluate the consequences of a mechanical loading on the hydraulic integrity of sensitive concrete structures like containment buildings of nuclear power plants. An elastic plastic damage constitutive law for the mechanical behaviour is first developed. The model is validated on elementary and structural applications with a special focus on the efficiency of the numerical tools (tangent matrices). A relation between water saturation (drying), damage and permeability is then proposed, based on theoretical and experimental observations. Finally, a Representative Structural Volume of a containment vessel is studied to highlight the influence of hygro - mechanical loading on the hydraulic behaviour (distribution of gas pressure)
LUSTOSA, CECILIA REIS ENGLANDER. "ON SOME RELATIONS BETWEEN NATURAL DEDUCTION AND SEQUENT CALCULUS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2014. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=24302@1.
Full textCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
Segerberg apresentou uma prova geral da completude para lógicas proposicionais. Para tal, um sistema de dedução foi definido de forma que suas regras sejam regras para um operador booleano arbitrário para uma dada lógica proposicional. Cada regra desse sistema corresponde a uma linha na tabela de verdade desse operador. Na primeira parte desse trabalho, mostramos uma extensão da ideia de Segerberg para lógicas proposicionais finito-valoradas e para lógicas não-determinísticas. Mantemos a ideia de definir um sistema de dedução cujas regras correspondam a linhas de tabelas verdade, mas ao invés de termos um tipo de regra para cada valor de verdade da lógica correspondente, usamos uma representação bivalente que usa a técnica de fórmulas separadoras definidas por Carlos Caleiro e João Marcos. O sistema definido possui tantas regras que pode ser difícil trabalhar com elas. Acreditamos que um sistema de cálculo de sequentes definido de forma análoga poderia ser mais intuitivo. Motivados por essa observação, a segunda parte dessa tese é dedicada à definição de uma tradução entre cálculo de sequentes e dedução natural, onde procuramos definir uma bijeção melhor do que as já existentes.
Segerberg presented a general completeness proof for propositional logics. For this purpose, a Natural Deduction system was defined in a way that its rules were rules for an arbitrary boolean operator in a given propositional logic. Each of those rules corresponds to a row on the operator s truth-table. In the first part of this thesis we extend Segerbergs idea to finite-valued propositional logic and to non-deterministic logic. We maintain the idea of defining a deductive system whose rules correspond to rows of truth-tables, but instead of having n types of rules (one for each truth-value), we use a bivalent representation that makes use of the technique of separating formulas as defined by Carlos Caleiro and João Marcos. The system defined has so many rules it might be laborious to work with it. We believe that a sequent calculus system defined in a similar way would be more intuitive. Motivated by this observation, in the second part of this thesis we work out translations between Sequent Calculus and Natural Deduction, searching for a better bijective relationship than those already existing.
Lacroix, Zoé. "Bases de données : des relations implicites aux relations contraintes." Paris 11, 1996. http://www.theses.fr/1996PA112264.
Full textDogui, Ayman. "Modélisation explicite de l'adaptation sémantique entre modèles de calcul." Thesis, Supélec, 2013. http://www.theses.fr/2013SUPL0030/document.
Full textThis work takes place in the context of hierarchical heterogeneous modeling using the model of computation approach in order to model complex systems which includes several components from different technical fields.Each of these components is usually designed according to a modeling paradigm that suits the technical domain and is based on specific semantics. Therefore, the overall system, which integrates the heterogeneous models of the components, requires semantic adaptation to ensure proper communication between its various sub-models.In this context, the aim of this thesis is to propose a new approach of semantic adaptation modeling where the semantic adaptation of time and control is specified by defining relationships between the occurrences of events as well as the time tags of these occurrences. This approach was integrated into the ModHel’X platform and tested on the case study of a power window system
Hu, Yueyun. "Sur le mouvement brownien : calculs de lois ; etudes asymptotiques ; filtrations ; relations avec certaines equations paraboliques." Paris 6, 1996. http://www.theses.fr/1996PA066201.
Full textCretin, Dominique. "Relations structure-propriété : calcul de pressions de vapeur et de seuils olfactifs de composés odorants." Lyon 1, 1996. http://www.theses.fr/1996LYO10060.
Full textMansouri, Baya. "Normes internationales élargies et dépassement du calcul de la valeur." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0101/document.
Full textIn the process of globalization, the States released the exchanges and created the markets as wellcommercial as financial. Companies from now on exposed to a competition on the excellent levelof planet in technological innovations of production and marketing, information andcommunication. The State (Etat), the Market-Exchange and the Enterprise crystallize each one inthis new world, an institution. The existence of each one implies the existence of both others. Thistriple implication forms an original structure called « thirdness » (tierceité), said the « 3 E ». Theredefinition of the Enterprise as institution thus supposes the redefinition of the value that itcreates. This last cease to be the retrospective fixed value of a voluminal quantity. It becomes aprospective value moving of a quantified quality of integrated strategic management. Newcountable rules regulate this one : widened international countable standards. These rules requirefor the enterprises those dimensions to produce a value of regeneration and breeding or « profit »aligned on a constant purchasing power. With this intention, integrated strategic managementimplies new behaviors of management. Those give up traditional arithmetic calculation founded onthe addition and the subtraction to replace them by a heuristic method of calculation ofrelations : « Conditional Normative Accounting Method ». These new behaviors of managementmobilized by this heuristic method to ensure the new value moving and prospective become the« account » of the accounting IFRS of the Enterprise whose finality is of: « to measure the realityof the predictive richness to remember » (in reference to the Exchange aiming at the Value), « tomeasure to act » (in reference to the Enterprise aiming at the Activity) and « to measure to divide »(in reference to the State (Etat) aiming at the Live well-offness together)
Moussa, Béchir. "Etude de stabilité et relation fréquence." Montpellier 2, 1999. http://www.theses.fr/1999MON20064.
Full textGerard, Ulysse. "Computing with relations, functions, and bindings." Thesis, Institut polytechnique de Paris, 2019. http://www.theses.fr/2019IPPAX005.
Full textThe present document pursues the decades-long study of the interactions between mathematical logic and functional computation, and more specifically of declarative programming. This thesis is divided into two main contributions. Each one of those make use of modern proof theory results to design new ways to compute with relations and with functions. The first contribution of this work is the description and formalization of a new technique that leverages the focusing mechanism (a way to guide proof-search) to reveal functional computation concealed in deductive proofs. To that extent we formulate a focused sequent calculus proof system for Heyting arithmetic where fixed points and term equality are logical connectives and describe a means to always drive singleton predicates into negative phases of the proof, thus identifying them with functional computation. This method does not extend the underlying logic in any way: no choice principle nor equality theory nor rewriting rules are needed. As a result, our logic remains purely relational even when it is computing functions. The second contribution of this thesis is the design of a new functional programming language: MLTS. Again, we make use of recent work in logic: the semantics of MLTS is a theory inside G-logic, the reasoning logic of the Abella interactive theorem prover. G-logic uses a specific operator: Nabla, a fresh-name quantifier which allows for a natural treatment of proofs over structures with bindings based on the natural handling of bindings of the sequent calculus. The syntax of MLTS is based on the programming language OCaml but provides additional sites so that term-level bindings can move to programming level bindings. Moreover, all operations on syntax respect alpha-beta-conversion. Together these two tenets form the lambda-tree syntax approach to bindings. The resulting language was given a prototype implementation that anyone can conveniently try online (https://trymlts.github.io)
Dogui, Ayman, and Ayman Dogui. "Modélisation explicite de l'adaptation sémantique entre modèles de calcul." Phd thesis, Supélec, 2013. http://tel.archives-ouvertes.fr/tel-00995072.
Full textParret-Fréaud, Augustin. "Estimation d'erreur de discrétisation dans les calculs par décomposition de domaine." Thesis, Cachan, Ecole normale supérieure, 2011. http://www.theses.fr/2011DENS0022/document.
Full textThe control of the quality of mechanical computations arouses a growing interest in both design and certification processes. It relies on error estimators the use of which leads to often prohibitive additional numerical costs on large computations. The present work puts forward a new procedure enabling to obtain a guaranteed estimation of discretization error in the setting of linear elastic problems solved by domain decomposition approaches. The method relies on the extension of the constitutive relation error concept to the framework of non-overlapping domain decomposition through the recovery of admissible interface fields. Its development within the framework of the FETI and BDD approaches allows to obtain a relevant estimation of discretization error well before the convergence of the solver linked to the domain decomposition. An extension of the estimation procedure to heterogeneous problems is also proposed. The behaviour of the method is illustrated and assessed on several numerical examples in 2 dimension
Latu, Guillaume. "Algorithmique parallèle et calcul haute performance dédiés à la simulation d'un système hôte-macroparasite." Bordeaux 1, 2002. http://www.theses.fr/2002BOR12632.
Full textDorneles, Caroline Lacerda. "Adição, subtração e cálculo relacional : uma intervenção com alunos do PROEJA FIC/ensino fundamental." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/69936.
Full textThis study aims to determine the role of teaching in learning the inverse relationship between addition and subtraction and the relational calculus can help in understanding this inverse relationship. The specific objectives are: to determine differences in understanding the inverse relationship between addition and subtraction before and after intervention; and to identify, after the intervention, the influences of knowing relational calculus in order to understand the inverse relationship. The proposal was characterized by an intervention-research with qualiquantitative approach, conducted with PROEJA FIC students from the Instituto Federal Farroupilha, São Borja Câmpus/RS. The study was carried out in four sessions with mathematical problems workshops and tests application: a pre-test, applied before the first session; a post-test, applied after the last session; and a delayed post-test, applied three months after the last session. For the quantitative analysis we used the method of analysis of variance (ANOVA) and performed a qualitative analysis of the observations, problems solving and strategies used in the problems. During the pre-test there was a small difference in hits in relation to the post-test. When compared to the delayed post-test, the students returned to their starting point, with the same number of hits from the pre-test. When we observed the types of problems involved, we noticed that the students had the highest number of hits on the block of direct problems. The block of indirect problems with unknown beginning was the one the students missed the most, but in the block of indirect problems with unknown addendum there was an increased number of hits from the pre-test to the delayed post-test. During the data analysis, we highlight that the PROEJA FIC students did not understand the inverse relationship between addition and subtraction, since when representing the problems they failed by not understanding the relationship indicated in the statement. This demonstrates a lack of knowledge on relational calculus, because by choosing incorrectly the calculus to solve a problem it is clear that the mental strategies used are not appropriate. Therefore, we observed that the PROEJA FIC students do not understand the inverse relationship between addition and subtraction, due to the fact they are still not able to understand the relationships and concepts involving the additive structure. Thus, the four intervention sessions were insufficient regarding the needs presented by the students. In order to obtain a more effective result with adults, we suggest a higher number of interventions.
Cuissart, Bertrand. "Plus grande structure commune à deux graphes : méthode de calcul et intérêt dans un contexte SAR." Caen, 2004. http://www.theses.fr/2004CAEN2043.
Full textLaloum, Eric. "Classification de calculs biliaires et urinaires à partir de spectres vibrationnels et de critères morphologiques : relation avec des données cliniques." Châtenay-Malabry, Ecole centrale de Paris, 1998. http://www.theses.fr/1998ECAP0591.
Full textTerwait, Abdallah. "Le calcul des Rd (Relations de discours) : approche sémantico-pragmatique et cognitive de la causalité en rapport avec la temporalité." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUL176.
Full textThis thesis proposes to address the question of causality in a formal perspective inspired by the framework of SDRT (Segmented Discourse Representation Theory). In particular, she pays attention to paratactic expressions of the causal relationship. This approach seems interesting and fruitful to us by the formalistic approach that it implements, its object being particularly labile. The analysis in this work focuses on the linguistic expression of causal relationships. The approach adopted to carry out treatments is to a large extent semantico-pragmatic. Although the functioning of linguistically marked causality, especially by means of because, is particularly documented in the scientific landscape (Moeschler 2003, Rossari 2004, Knott 1996, etc.), untagged sequences (paratactic) seem to be little studied in the linguistic research. This is in a way the main motivation that drove the implementation of this monograph. This study could therefore be situated at the interface between theoretical linguistics and formal linguistics. The treatments that are carried out rely largely on the EXPLICADIS corpus (Explanation and Speech argumentation). The choice of this resource could be justified in this way: this corpus makes it possible to account for causal relations according to a semasiological approach of relying almost exclusively on the relation itself without taking into account its linguistic markers.Moreover, we will address, in this research, the question of the Causation. In this respect, the argumental treatment ("the speculative spectrum") of so-called causative verbs (cause, provoke, trigger, etc.) would allow us to note that the arguments of this particular type of predicate would admit a propositional interpretation. The initial hypothesis is that the causation, thus conceived, seems to represent an implicit or more simply underlying inter-propositional relation. Moreover, we will focus on the causality / agency dichotomy
Parret-fréaud, Augustin. "Estimation d'erreur de discrétisation dans les calculs par décomposition de domaine." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2011. http://tel.archives-ouvertes.fr/tel-00846069.
Full textLasson, Marc. "Réalisabilité et paramétricité dans les systèmes de types purs." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2012. http://tel.archives-ouvertes.fr/tel-00770669.
Full textWaeytens, Julien. "Contrôle des calculs en dynamique : bornes strictes et pertinentes sur une quantité d'intérêt." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2010. http://tel.archives-ouvertes.fr/tel-00561476.
Full textRabahi, Tahar. "Étude des relations entre stimuli cognitifs et la motricité relative à un geste complexe." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10023/document.
Full textSeveral studies have shown that cortical motor areas, located in the frontal cortex and responsible for voluntary movement, might be involved in the process of understanding action words. From this point of view, it has been reported that the performance of a simple motor act (e.g.: catching an object) might be improved by the pronunciation, reading or listening to words referring to the action. We approached the relationship between speech and action through the study of the effect of action verbs and other cognitive stimuli, kinesthetic imagery (KI) and mental subtraction (MS), upon the performance of a complex motor act, the Squat vertical jump (SVJ). We measured the height of SVJ in young naive men (7 experiments, n = 114) and women (2 experiments, n = 41) using an Optojump® and a Myotest® apparatuses. The results showed that the silent and loud pronunciation of specific action verb to SVJ (jump), the KI and the MS improved significantly the performance of the movement, in men (up to 2.7 cm) but less in women (up to + 1 cm in the 2 experiments). The results of other experiments obtained with men indicated that pronunciation of the action verb nonspecific to the jump (pinch) increased also the SVJ performance, while the pronunciation or listening to other verbs unrelated to the jump (Jick, move) had no significant effect on the SVJ. A meaningless verb for the French subjects (tiao = jump in Chinese) showed, in turn, no effect as did dream, faJJ and stop. The verb win improved significantly the SVJ height as much as its antonym Jose, thus suggesting a possible influence of affects in the subjects' performance. It appears that the effects of the specific action verb jump did seem effective but not totally exclusive for the enhancement of the SVJ performance, since non-linguistic stimuli (IK) or unrelated to action (MS) may have had a positive effect on the improvement in motor performance. Moreover verbs referring to emotion, unrelated to action, increased the height of SVJ similarly to the specific action verb jump. The results led us to consider the hypothesis that improving the performance of a complex gesture is dependent, a minima, upon the individual's intention, attention, emotions and also, and perhaps most importantly, concepts (we call concepts, the mental representations) as they may be induced by the cerebral processing of words
Augier, Sébastien. "Apprentissage Supervisé Relationnel par Algorithmes d'Évolution." Phd thesis, Université Paris Sud - Paris XI, 2000. http://tel.archives-ouvertes.fr/tel-00947322.
Full textJaber, Ghaleb. "Le langage pascal/relationnel : un langage de programmation de bases de donnees." Toulouse 3, 1987. http://www.theses.fr/1987TOU30222.
Full textRmou, Abdelaziz. "Calcul numérique des coefficients d'ionisation par impact dans Ga1-xAlxSb (0<- x <- 0,08) : Relation avec la structure de bandes." Montpellier 2, 1994. http://www.theses.fr/1994MON20089.
Full textSteinhaus, Sebastian. "Constructing quantum spacetime : relation to classical gravity." Phd thesis, Universität Potsdam, 2014. http://opus.kobv.de/ubp/volltexte/2015/7255/.
Full textTrotz bemerkenswerter Fortschritte im vergangenen Jahrhundert, die unser Verständnis des Universums revolutioniert haben, gibt es noch zahlreiche ungeklärte Fragen in der theoretischen Physik. Besondere Bedeutung kommt der Tatsache zu, dass die Theorien, welche die fundamentalen Wechselwirkungen der Natur beschreiben, inkompatibel sind. Nach Einsteins allgemeiner Relativitätstheorie wird die Gravitation durch eine dynamische Raumzeit dargestellt, die von Materie gekrümmt wird und ihrerseits durch die Krümmung die Bewegung der Materie bestimmt. Dem gegenüber steht die Quantenfeldtheorie, die die verbliebenen Wechselwirkungen - elektromagnetische, schwache und starke Wechselwirkung - im Standardmodell der Teilchenphysik beschreibt, in dem Teilchen auf einer statischen Raumzeit -- ohne Gravitation -- miteinander interagieren. Die Hoffnung ist, dass eine Theorie der Quantengravitation diese Inkompatibilität beheben kann, indem, heuristisch, die klassische Raumzeit durch eine 'Quantenraumzeit' ersetzt wird. Es gibt zahlreiche Ansätze eine solche Theorie zu definieren, die auf unterschiedlichen Prämissen und Ideen beruhen, wobei a priori nicht klar ist, welche zu bevorzugen sind. Eine Minimalanforderung an diese Theorien ist Kompatibilität mit der klassischen Theorie, die sie verallgemeinern sollen. Interessanterweise basieren zahlreiche Modelle in ihrer Definition auf Diskretisierungen oder postulieren eine fundamentale Diskretheit der Raumzeit. Neben den unmittelbaren Vorteilen, die Diskretisierungen bieten, z.B. das Ermöglichen numerischer Simulationen, gibt es auch gravierende Nachteile, die einer ausführlichen Untersuchung bedürfen: Im Allgemeinen brechen Diskretisierungen die fundamentale Diffeomorphismensymmetrie der Gravitation und sind in der Regel nicht eindeutig definiert. Beides erschwert die Wiederherstellung der Verbindung zur klassischen, kontinuierlichen Theorie. Das Hauptaugenmerk dieser Doktorarbeit liegt darin diese Verbindung insbesondere für Spin-Schaum-Modelle (spin foam models) zu untersuchen. Dies geschieht auf sehr verschiedenen Ebenen der Diskretisierung / Triangulierung, angefangen bei wenigen Simplizes bis hin zum Kontinuumslimes. Im Regime weniger Simplizes wird die bekannte Verbindung von Spin--Schaum--Modellen zu diskreter Gravitation bestätigt und vertieft. Außerdem diskutieren wir dynamische Prinzipien, z.B. Diffeomorphismeninvarianz im Diskreten, um die Ambiguitäten der Modelle zu fixieren. Um diese Bedingungen zu erfüllen, müssen die diskreten Modelle durch Renormierungsverfahren verbessert werden, wodurch wir auch ihre Kontinuumsdynamik untersuchen können. Angewandt auf vereinfachte Spin-Schaum-Modelle finden wir eine reichhaltige, nicht-triviale Fixpunkt-Struktur, die wir in einem Phasendiagramm zusammenfassen. Inspiriert von diesen Methoden schlagen wir zu guter Letzt eine konsistente Konstruktionsmethode für die Kontinuumstheorie vor, die einen eindeutigen Vakuumszustand definiert.
Latourte, Felix. "IDENTIFICATION DES PARAMETRES D'UNE LOI ELASTOPLASTIQUE DE PRAGER ET CALCUL DE CHAMPS DE CONTRAINTE DANS DES MATERIAUX HETEROGENES." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2007. http://tel.archives-ouvertes.fr/tel-00214302.
Full textLes applications présentées concernent l'identification de propriétés élastiques hétérogènes, l'estimation de puissances mécaniques localement fournies lors d'essais de fatigue à grand nombre de cycles, et l'identification de propriétés élastoplastiques hétérogènes.
Orange, Sébastien. "Calcul de corps de décomposition : utilisations fines d' ensembles de permutations en théorie de Galois effective." Paris 6, 2006. http://www.theses.fr/2006PA066307.
Full textBellec, Jérémie. "Prise en compte de la variabilité dans le calcul de structures avec contact." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2008. http://tel.archives-ouvertes.fr/tel-00472143.
Full textRasi, Gislaine Carvalho. "Estruturas multiplicativas: concepções de alunos de ensino fundamental." Pontifícia Universidade Católica de São Paulo, 2009. https://tede2.pucsp.br/handle/handle/11386.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
This research comprehends the multiplicative structures and its objective is to investigate the conceptions the seventh grade students put in motion when they establish ternary relations and the relational calculus. We especially search to verify how these students deal with the multiplicative relations which involve notions of transformation and binary composition, and how they make use of the properties of multiplication. Our theoretical approach is based upon Vergnaud s contributions (1991, 1996) presented in the Conceptual Fields Theory and in the Multiplicative Conceptual Field, mainly on the notions of relation and relational calculus which allowed the elaboration of activities and the results analysis. As for the methodology adopted, we chose the case study, which allowed a better comprehension of the relations established by students during the resolution of multiplicative problems, and thus contributing to the achievement of our objective. With instruments of data collection, we made observations during the activities accomplishment, in two study groups and we collected the children s written record of these activities resolution. We verified, in the data analysis, that students have a certain difficulty in composing two transformations and a concentration in the establishment of ternary relations which involve the transformation notion. These observations demonstrated the importance of improving the work with multiplicative structures in a way to promote a good variety of situations and relations regarding the Multiplicative Conceptual Field, especially the ternary relations, as a law of binary composition with its properties
Esta pesquisa aborda as estruturas multiplicativas e tem como objetivo investigar as concepções que os alunos do sétimo ano mobilizam quando estabelecem relações ternárias e o cálculo relacional. Procuramos, especialmente, verificar como esses alunos tratam as relações multiplicativas que envolvem noções de transformação e de composição binária e como utilizam as propriedades da multiplicação. Nossa fundamentação teórica apóia-se nas contribuições de Vergnaud (1991, 1996) apresentadas na Teoria dos Campos Conceituais e no Campo Conceitual Multiplicativo, sobretudo, nas noções de relação e cálculo relacional que permitiram a elaboração das atividades e a análise dos resultados. Quanto à metodologia, escolhemos o estudo de caso que possibilitou uma melhor compreensão das relações estabelecidas pelos alunos durante a resolução de problemas multiplicativos, propiciando o alcance de nosso objetivo. Como instrumentos de coleta de dados, fizemos observações durante a aplicação das atividades, em dois grupos de estudo e recolhemos o registro escrito pelas crianças da resolução dessas atividades. Na análise dos dados constatamos que os alunos apresentam alguma dificuldade ao compor duas transformações e uma concentração no estabelecimento das relações ternárias que envolvem a noção de transformação. Estas constatações demonstraram a importância da ampliação do trabalho com as estruturas multiplicativas, de modo a promover grande variedade de situações e relações que dizem respeito ao Campo Conceitual Multiplicativo, em especial, às relações ternárias, como uma lei de composição binária com suas propriedades
Neiger, Vincent. "Bases of relations in one or several variables : fast algorithms and applications." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEN052.
Full textIn this thesis, we study algorithms for a problem of finding relations in one or several variables. It generalizes that of computing a solution to a system of linear modular equations over a polynomial ring, including in particular the computation of Hermite- Padéapproximants and bivariate interpolants. Rather than a single solution, we aim at computing generators of the solution set which have good properties. Precisely, the input of our problem consists of a finite-dimensional module given by the action of the variables on its elements, and of some elements of this module; the goal is to compute a Gröbner basis of the module of syzygies between these elements. In terms of linear algebra, the input describes a matrix with a type of Krylov structure, and the goal is to compute a compact representation of a basis of the nullspace of this matrix. We propose several algorithms in accordance with the structure of the multiplication matrices which specify the action of the variables. In the case of a Jordan matrix, we accelerate the computation of multivariate interpolants under degree constraints; our result for a Frobenius matrix leads to a faster algorithm for computing normal forms of univariate polynomial matrices. In the case of several dense matrices, we accelerate the change of monomial order for Gröbner bases of multivariate zero-dimensional ideals
Pled, Florent. "Vers une stratégie robuste et efficace pour le contrôle des calculs par éléments finis en ingénierie mécanique." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2012. http://tel.archives-ouvertes.fr/tel-00776633.
Full textVergu, Cristian. "Twisters, cordes et théories de jauge supersymétriques." Paris 6, 2008. http://www.theses.fr/2008PA066258.
Full textThai, Hoang phuong. "Sur l'utilisation de l'analyse isogéométrique en mécanique linéaire ou non-linéaire des structures : certification des calculs et couplage avec la réduction de modèle PGD." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLN017/document.
Full textThe topic of the PhD thesis deals with the construction of advanced numerical approaches for the simulation and optimization of mechanical structures with complex geometry. It focuses on the Isogeometric Analysis (IGA) technology which has received much attention of the last decade due to its increased flexibility, accuracy, and robustness in many engineering simulations compared to classical Finite Element Analysis (FEA). In particular, IGA enables a direct link with CAD software (the same functions are used for both analysis and geometry) and facilitates meshing procedures.In this framework, and as a first part of the work, a verification method based on duality and the concept of Constitutive Relation Error (CRE) is proposed. It enables to derive guaranteed and fully computable a posteriori error estimates on the numerical solution provided by IGA. Such estimates, which are valid for a wide class of linear or nonlinear structural mechanics models, thus constitute performing and useful tools to quantitatively control the numerical accuracy and drive adaptive procedures. The focus here is on the construction of equilibrated flux fields, which is key ingredient of the CRE concept, and which was until now almost exclusively developed in the FEA framework alone. The extension to IGA requires to address some technical issues, due to the use of B-Spline/NURBS basis functions. The CRE concept is also implemented together with adjoint techniques in order to perform goal-oriented error estimation.In a second part, IGA is coupled with model reduction in order to get certified real-time solutions to problems with parameterized geometry. After defining the parametrization on the mapping from the IGA parametric space to the physical space, a reduced model based on the Proper Generalized Decomposition (PGD) is introduced to solve the multi-dimensional problem. From an offline/online strategy, the procedure then enables to describe the manifold of parametric solutions with reduced CPU cost, and to further perform shape optimization in real-time. Here again, a posteriori estimation of the various error sources inheriting from discretization and PGD model reduction is performed from the CRE concept. It enables to control the quality of the approximate PGD solution (globally or on outputs of interest), for any geometry configuration, and to feed a robust greedy algorithm that optimizes the computational effort for a prescribed error tolerance.The overall research work thus provides for reliable and practical tools in mechanical engineering simulation activities. Capabilities and performance of these tools are shown on several numerical experiments with academic and engineering problems, and with linear and nonlinear (damage) models
Mégret, Claire. "Détermination par des calculs DFT de la relation entre énergies de liaison H-C et M-C : Vers une évaluation du contrôle thermodynamique de la sélectivité d'activation C-H." Montpellier 2, 2004. http://www.theses.fr/2004MON20061.
Full textMorlot, Thomas. "La gestion dynamique des relations hauteur-débit des stations d'hydrométrie et le calcul des incertitudes associées : un indicateur de gestion, de qualité et de suivi des points de mesure." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENU029/document.
Full textDealer or owner operator of electricity production structures, EDF is responsible for their operation in safe condition and for the respect of the limits imposed by the regulations. Thus, the knowledge of water resources is one of EDF main concerns since the company remains preoccupied about the proper use of its facilities. The knowledge of streamflow is one of its priorities to better respond to three key issues that are plant safety, compliance with regulatory requirements, and optimizing the means of production. To meet these needs, EDF-DTG (Division Technique Générale) operates an observation network that includes both climatic parameters such as air and temperature, then the precipitations and the snow, but also the streamflow. The data collected allows real time monitoring of rivers, as well as hydrological studies and the sizing of structures. Ensuring the quality of the stream flow data is a priority. Up to now it is not possible to measure continuously the flow of a river since direct measurements of discharge are time consuming and expensive. In common cases the flow of a river can be deduced from continuous measurements of water level. Punctual measurements of discharge called gaugings allow to develop a stage-discharge relationship named rating curve. These are permanently installed equipment on rivers for measuring levels that are called hydrometric station. It is clear that the whole process constitutes an indirect way of estimating the discharge in rivers whose associated uncertainties need to be described. Quantification of confidence intervals is however not the only problem of the hydrometer. Fast changes in the stage-discharge relationship often make the streamflow real time monitoring quite difficult while the needs of continuous high reliability data is obvious. The historical method to produce the rating curve based on a construction from a suffcient number of gaugings chronologically contiguous and well distributed over the widest possible range of discharge remains poorly adapted to fast or cyclical changes of the stage-discharge relationship. The classical method does not take suffciently into account the erosion and sedimentation processes as well as the seasonal vegetation growth. Besides, the ability to perform gaugings by management teams generally remains quite limited. To get the most accurate streamflow data and to improve their reliability, this thesis explores an original dynamic method to compute rating curves based on historical gaugings from a hydrometric station while calculating the associated uncertainties. First, a dynamic rating curve assessment is created in order to compute a rating curve for each gauging of a considered hydrometric station. After the tracing, a model of uncertainty is built around each computed rating curve. It takes into account the uncertainty of gaugings, but also the uncertainty in the measurment of the water height, the sensitivity of the stage discharge relationship and the quality of the tracing. A variographic analysis is used to age the gaugings and the rating curves and obtain a final confidence interval increasing with time, and actualizing at each new gauging since it gives rise to a new rating curve more reliable because more recent for the prediction of discharge to come. Chronological series of streamflow data are the obtained homogeneously and with a confidence interval that takes into consideration the aging of the rating curves. By taking into account the variability of the flow conditions and the life of the hydrometric station, the method can answer important questions in the field of hydrometry such as « How many gauging a year have to be made so as to produce stream flow data with an average uncertainty of X\% ? » and « When and in which range of water flow do we have to realize those gaugings ? »
Blasiak, Pawel Piotr. "Combinatorics of boson normal ordering and some applications." Paris 6, 2005. http://www.theses.fr/2005PA066185.
Full textVollery, Luc. "Les relations entre rapports et réunions en droit successoral : l'article 527 chiffre 1 du Code civil et le principe de la comptabilisation des rapports dans la masse de calcul des réserves /." Fribourg, Suisse : Éd. Univ, 1994. http://www.gbv.de/dms/spk/sbb/recht/toc/27195373X.pdf.
Full textMaisonneuve, Vivien. "Analyse statique des systèmes de contrôle-commande : invariants entiers et flottants." Thesis, Paris, ENMP, 2015. http://www.theses.fr/2015ENMP0007/document.
Full textA critical software is a software whose malfunction may result in death or serious injury to people, loss or severe damage to equipment or environmental harm.Software engineering for critical systems is particularly difficult, and combines different methods to ensure the quality of produced software.Among them, formal methods can be used to prove that a software obeys its specifications.This thesis falls within the context of the validation of safety properties for critical software, and more specifically, of numerical properties for embedded software in control-command systems.The first part of this thesis deals with Lyapunov stability proofs.These proofs rely on computations with real numbers, and do not accurately describe the behavior of a program run on a platform with machine arithmetic.We introduce a generic, theoretical framework to adapt the arguments of Lyapunov stability proofs to machine arithmetic.A tool automatically translates the proof on real numbers to a proof with floating-point numbers.The second part of the thesis focuses on linear relation analysis, using an abstract interpretation based on the approximation by convex polyhedrons of valuations associated with each control point in a program.We present ALICe, a framework to compare different invariant generation techniques.It comes with a collection of test cases taken from the program analysis literature, and interfaces with three tools, that rely on different algorithms to compute invariants: Aspic, iscc and PIPS.To refine PIPS results, two code restructuring techniques are introduced, and several improvements are made to the invariant generation algorithms and evaluated using ALICe
Moalla, Borhane. "Approximants de Padé, polynômes orthogonaux (cas matriciel)." Rouen, 1995. http://www.theses.fr/1995ROUES052.
Full textLeperchey, Benjamin. "Sur la notion d'observation en sémantique." Phd thesis, Université Paris-Diderot - Paris VII, 2005. http://tel.archives-ouvertes.fr/tel-00102637.
Full textLa partie suivante est consacrée à l'étude de la notion d'observation dans le cadre d'un langage avec des effets de bord. Nous proposons un modèle basé sur les domaines de Fraenkel-Mostowski, sur lequel nous définissons des relations logiques pour prouver des équivalences, aui servent à distinguer la partie publique de la mémoire de la partie secrète où les invariants sont préservés; ce qui établit un lien avec les problématiques de sécurité.
Enfin, nous étudions la question du temps d'exécution en sémantique dénotationnelle. Nous proposons une construction axiomatique, basée sur une monade, pour représenter le te,ps d'exécution sans le rendre observable par le contexte. Nous appliquons cette construction au modèle des espaces de cohérence et aux jeux de Hyland et Ong. Nous prouvons que ce dernier modèle est complètement adéquat.
Touré, Ibrahima. "Calculs d'épaisseurs optiques : Évaluation des flux de diverses composantes au sol du rayonnement solaire, application capteur plan classique et capteur à renforcement de flux incident." Nancy 1, 1987. http://www.theses.fr/1987NAN10320.
Full textDelarue, Patrice. "Évolution structurale en fonction de la température de monocristaux de solutions solides K XRB 1 XTIOPO 4, 0 X 1 ; corrélation avec leurs susceptibilités électriques du second et du troisième ordre." Nancy 1, 1999. http://www.theses.fr/1999NAN10177.
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