• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • 1
  • Tagged with
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Inversões na elipse

Zampieri, Eduardo Alexandre January 2015 (has links)
Orientador: Prof. Dr. Márcio Fabiano da Silva / Dissertação (mestrado) - Universidade Federal do ABC, Programa de Pós-Graduação em Mestrado Profissional em Matemática em Rede Nacional, 2015. / Este trabalho tem por objetivo estudar o processo de inversão geométrica na elipse que nada mais é do que uma transformação geométrica sofrida em uma superfície não plana. Mais do que isso, é uma forma de propor um trabalho diferenciado ao professor do Ensino Médio baseado nas aplicações da Elipse e de suas propriedades e que a partir de um trabalho de pesquisa pode ser estendido para as demais cônicas. Diferente da inversão geométrica clássica na circunferência, utilizamos a elipse como agente inversor. Primeiramente trazemos um apanhado da história da elipse. Apresentamos seus elementos, seus conceitos e propriedades básicas.Recordamos a homotetia, que é uma transformação geométrica do plano e que faz parte do estudo dos resultados das inversões estudadas. Em seguida, passamos a estudar as inversões na elipse. Então, para finalizar, são sugeridas atividades envolvendo as elipses e outras as inversões que nela ocorrem. Tais atividades podem ser aplicadas em sala de aula desde as primeiras séries do ensino fundamental II, desmistificando a famosa pergunta: Onde e/ou para que vou usar "isso", professor? São atividades de pesquisa, atividades interativas e de trabalho com o software de geometria dinâmica Geogebrar. / This work aims to study the geometric inversion process on the ellipse which is nothing more than a geometric transformation suffered in a non-planar surface. More than that, it¿s a way of proposing a differentiated work to high school teacher based on practical applications of Ellipse and its properties and that from a research paper can be extended to other conical. Unlike the classic geometric inversion in the circle, we use the ellipse as inverter agent. First we bring an overview of the history of the ellipse. We present its elements, its concepts and basic properties. We recall about dilation, which is a geometric transformation on plane very important to study the results of studied inversions. Then, we began to study the inversions on Ellipse. Finally, we suggest activities involving the ellipses and other inversions that occur in it. Such activities can be applied in the classroom from the early grades of elementary school, demystifying the famous question: Where and / or I will use " it ", Professor? Are research activities, interactive activities and work with dynamic geometry software Geogebrar.
2

Méthodes d'accéleration pour la résolution numérique en électrolocation et en chimie quantique / Acceleration methods for numerical solving in electrolocation and quantum chemistry

Laurent, Philippe 26 October 2015 (has links)
Cette thèse aborde deux thématiques différentes. On s’intéresse d’abord au développement et à l’analyse de méthodes pour le sens électrique appliqué à la robotique. On considère en particulier la méthode des réflexions permettant, à l’image de la méthode de Schwarz, de résoudre des problèmes linéaires à partir de sous-problèmes plus simples. Ces deniers sont obtenus par décomposition des frontières du problème de départ. Nous en présentons des preuves de convergence et des applications. Dans le but d’implémenter un simulateur du problème direct d’électrolocation dans un robot autonome, on s’intéresse également à une méthode de bases réduites pour obtenir des algorithmes peu coûteux en temps et en place mémoire. La seconde thématique traite d’un problème inverse dans le domaine de la chimie quantique. Nous cherchons ici à déterminer les caractéristiques d’un système quantique. Celui-ci est éclairé par un champ laser connu et fixé. Dans ce cadre, les données du problème inverse sont les états avant et après éclairage. Un résultat d’existence locale est présenté, ainsi que des méthodes de résolution numériques. / This thesis tackle two different topics.We first design and analyze algorithms related to the electrical sense for applications in robotics. We consider in particular the method of reflections, which allows, like the Schwartz method, to solve linear problems using simpler sub-problems. These ones are obtained by decomposing the boundaries of the original problem. We give proofs of convergence and applications. In order to implement an electrolocation simulator of the direct problem in an autonomous robot, we build a reduced basis method devoted to electrolocation problems. In this way, we obtain algorithms which satisfy the constraints of limited memory and time resources. The second topic is an inverse problem in quantum chemistry. Here, we want to determine some features of a quantum system. To this aim, the system is ligthed by a known and fixed Laser field. In this framework, the data of the inverse problem are the states before and after the Laser lighting. A local existence result is given, together with numerical methods for the solving.

Page generated in 0.0942 seconds