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Dissertations / Theses on the topic 'Topological structures'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Mosley, Alexander James. "Groups definable in topological structures." Thesis, Queen Mary, University of London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343709.

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2

Heller, Gabriella. "Topological Complexity in Protein Structures." Scholarship @ Claremont, 2014. http://scholarship.claremont.edu/pomona_theses/118.

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For DNA molecules, topological complexity occurs exclusively as the result of knotting or linking of the polynucleotide backbone. By contrast, while a few knots and links have been found within the polypeptide backbones of some protein structures, non-planarity can also result from the connectivity between a polypeptide chain and attached metal structures. In this thesis, we survey the known types of knots, links, and non-planar graphs in protein structures with and without including such bonds between proteins and metals. Then we present new examples of protein structures containing M\"obius

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3

Gregory, Ruth Ann Watson. "Topological defects in cosmology." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292897.

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4

Edvardsson, Elisabet. "Band structures of topological crystalline insulators." Thesis, Karlstads universitet, Institutionen för ingenjörsvetenskap och fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-65536.

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Topological insulators and topological crystalline insulators are materials that have a bulk band structure that is gapped, but that also have toplogically protected non-gapped surface states. This implies that the bulk is insulating, but that the material can conduct electricity on some of its surfaces. The robustness of these surface states is a consequence of time-reversal symmetry, possibly in combination with invariance under other symmetries, like that of the crystal itself. In this thesis we review some of the basic theory for such materials. In particular we discuss how topological inv

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5

Pugh, David John Rhydwyn. "Topological structures in lattice gauge theory." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279896.

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6

Johansson, Gunnar. "Local Level Set Segmentation with Topological Structures." Thesis, Linköping University, Department of Science and Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6904.

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<p>Locating and segmenting objects such as bones or internal organs is a common problem in medical imaging. Existing segmentation methods are often cumbersome to use for medical staff, since they require a close initial guess and a range of different parameters to be set appropriately. For this work, we present a two-stage segmentation framework which relies on an initial isosurface interactively extracted by topological analysis. The initial isosurface seldom provides a correct segmentation, so we refine the surface using an iterative level set method to better match the desired object bounda

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7

Chishwashwa, Nyumbu. "Pairings of Binary reflexive relational structures." Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_7126_1256734489.

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<p>The main purpose of this thesis is to study the interplay between relational structures and topology , and to portray pairings in terms of some finite poset models and order preserving maps. We show the interrelations between the categories of topological spaces, closure spaces and relational structures. We study the 4-point non-Hausdorff model S4 weakly homotopy equivalent to the circle S1. We study pairings of some objects in the category of relational structures similar to the multiplication S4 x S4- S4 S4 fails to be order preserving for posets. Nevertheless, applying a single barycentr

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8

Macfarlane, Andrew Ian. "Reporting structures: Category theory, algebraic and topological properties." Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/132394/1/Andrew_Macfarlane_Thesis.pdf.

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This thesis treats the logic of operations and governance of a large corporation as a single abstract mathematical object that expresses the web of dependencies and the coordinating hierarchies of corporate logic. The thesis initiates a study of the logic of high-level descriptions and the evolutionary dynamics of reporting structures. It provides a new way for an enterprise to investigate and characterise its own complex logic.

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9

Farsangi, Hossein E. "Topological optimisation of double layer grids using genetic algorithm." Thesis, University of Surrey, 2002. http://epubs.surrey.ac.uk/750/.

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10

FERREIRA, MARCOS DE OLIVEIRA LAGE. "SCALABLE TOPOLOGICAL DATA{STRUCTURES FOR 2 AND 3 MANIFOLDS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8176@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Pesquisas na área de estrutura de dados são fundamentais para aumentar a generalidade e eficiência computacional da representacão de modelos geometricos. Neste trabalho, apresentamos duas estruturas de dados topológicas escalonáveis, uma para superfícies triânguladas, chamada CHE (Compact Half--Edge), e outra para malhas de tetraedros, chamada CHF (Compact Half--Face). Tais estruturas são compostas de diferentes níveis, que nos possibilitam alterar a quantidade de dados armazenados com objetivo de melhorar sua eficiência

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11

Krishna, Aditya. "Topological Imaging of Tubular Structures using Ultrasonic guided waves." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0111.

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Les structures tubulaires sont largement utilisées dans diverses industries telles que l’aérospatiale, le pétrole et le gaz, le nucléaire, etc. Le Contrôle Non Destructive (CND) de ces structures joue un rôle crucial au cours de leur cycle de vie. Afin de tester de grandes structures avec une accessibilité limitée, la méthode de CND utilisant des ondes guidées a été développée comme une solution viable. En raison de la nature de ces ondes, elles sont capables de se propager sur de grandes distances sans perdre une grande partie de leur énergie. Cependant, elles sont complexes puisque leur vite

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12

Jesurum, Caroline Esther 1969. "Local-rules based topological modeling of tetrahedral ceramic network structures." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/49622.

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13

Mamino, Marcello. "Topological results on definably compact groups in o-minimal structures." Doctoral thesis, Scuola Normale Superiore, 2010. http://hdl.handle.net/11384/85665.

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14

Liu, Chun-Hung. "Graph structures and well-quasi-ordering." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52262.

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Robertson and Seymour proved that graphs are well-quasi-ordered by the minor relation. In other words, given infinitely many graphs, one graph contains another as a minor. An application of this theorem is that every property that is closed under deleting vertices, edges, and contracting edges can be characterized by finitely many graphs, and hence can be decided in polynomial time. In this thesis we are concerned with the topological minor relation. We say that a graph G contains another graph H as a topological minor if H can be obtained from a subgraph of G by repeatedly deleting a vertex

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15

Hübner, scherer Fernando. "Topological optimization of shells with isogeometric analysis." Electronic Thesis or Diss., Institut polytechnique de Paris, 2024. http://www.theses.fr/2024IPPAX105.

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Ce manuscrit présente des méthodes d'optimisation compatibles avec la conception assistée par ordinateur (CAO), avec emphase sur les coques de Reissner-Mindlin sous le paradigme de l'analyse isogéométrique (IGA). La principale contribution est un nouveau cadre pour l'optimisation topologique des coques épaisses courbes, non conformes, multi-patchs et trimées, soumises à des chargements externes.Cette méthode intègre la méthode des lignes de niveaux (LSM) avec une interface diffuse, une dérivée de forme de Hadamard et l'IGA multi-patch dans un algorithme de descente de gradient, permettant la c

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16

Donoso, Sebastian Andres. "Contributions to ergodic theory and topological dynamics : cube structures and automorphisms." Thesis, Paris Est, 2015. http://www.theses.fr/2015PEST1007/document.

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Cette thèse est consacrée à l'étude des différents problèmes liés aux structures des cubes , en théorie ergodique et en dynamique topologique. Elle est composée de six chapitres. La présentation générale nous permet de présenter certains résultats généraux en théorie ergodique et dynamique topologique. Ces résultats, qui sont associés d'une certaine façon aux structures des cubes, sont la motivation principale de cette thèse. Nous commençons par les structures de cube introduites en théorie ergodique par Host et Kra (2005) pour prouver la convergence dans $L^2 $ de moyennes ergodiques multiple

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17

Donoso, Fuentes Sebastián Andrés. "Contributions to ergodic theory and topological dynamics: cube structures and automorphisms." Tesis, Universidad de Chile, 2015. http://repositorio.uchile.cl/handle/2250/135055.

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Doctor en Ciencias de la Ingeniería, Mención Modelación Matemática<br>Esta tesis está consagrada al estudio de diferentes problemas en teoría ergódica y dinámica topológica, relacionados a "estructuras de cubos". Consta de seis capítulos. En la presentación general entregamos resultados generales, ligados en cierta manera a las estructuras de cubos que motivan esta tesis. Comenzamos por las estructuras de cubos introducidas en teoría ergódica por Host y Kra para probar la convergencia en L^2 de medias ergódicas múltiples. Luego presentamos su extensión a dinámica topológica, desarrollada por

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18

Paulus, Christoph Joachim. "Topological changes in simulations of deformable objects." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAD009/document.

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La découpe virtuelle d'objets déformables est au coeur de nombreuses applications pour la simulation interactive. Nous présentons un nouvel algorithme de remaillage permettant la simulation de découpes avec la méthode des éléments finis. Nous avons combiné notre algorithme avec la méthode du «snapping» déplaçant les noeuds la surface de coupe, pour des tétradres linéaires. Notre approche permet de maîtriser le nombre de noeuds et de la qualité numérique du maillage durant les coupes. Elle donne des résultats similaires pour les fonctions de forme quadratiques. Dans ce cadre, nous avons évalué

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19

Schneider, Friedrich Martin. "A Relational Localisation Theory for Topological Algebras." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-93424.

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In this thesis, we develop a relational localisation theory for topological algebras, i.e., a theory that studies local approximations of a topological algebra’s relational counterpart. In order to provide an appropriate framework for our considerations, we first introduce a general Galois theory between continuous functions and closed relations on an arbitrary topological space. Subsequently to this rather foundational discussion, we establish the desired localisation theory comprising the identification of suitable subsets, the description of local structures, and the retrieval of global inf

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20

Kniesburges, Sebastian [Verfasser]. "Distributed data structures and the power of topological self-stabilization / Sebastian Kniesburges." Paderborn : Universitätsbibliothek, 2015. http://d-nb.info/1076824382/34.

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21

Dhifli, Wajdi. "Topological and domain Knowledge-based subgraph mining : application on protein 3D-structures." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2013. http://tel.archives-ouvertes.fr/tel-00946989.

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This thesis is in the intersection of two proliferating research fields, namely data mining and bioinformatics. With the emergence of graph data in the last few years, many efforts have been devoted to mining frequent subgraphs from graph databases. Yet, the number of discovered frequentsubgraphs is usually exponential, mainly because of the combinatorial nature of graphs. Many frequent subgraphs are irrelevant because they are redundant or just useless for the user. Besides, their high number may hinder and even makes further explorations unfeasible. Redundancy in frequent subgraphs is mainly

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22

Pulim, Vinay 1976. "A simulator for the topological modeling of ceramic structures using local rules." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80610.

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23

Wojtowytsch, Stephan Jan. "Phase-field models for thin elastic structures : Willmore's energy and topological constraints." Thesis, Durham University, 2017. http://etheses.dur.ac.uk/12231/.

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In this dissertation, I develop a phase-field approach to minimising a geometric energy functional in the class of connected structures confined to a small container. The functional under consideration is Willmore's energy, which depends on the mean curvature and area measure of a surface and thus allows for a formulation in terms of varifold geometry. In this setting, I prove existence of a minimiser and a very low level of regularity from simple energy bounds. In the second part, I describe a phase-field approach to the minimisation problem and provide a sample implementation along with an a

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24

Du, Jia-Zheng. "Methods and software development for sectional and topological optimization of frame structures." Reims, 2004. http://theses.univ-reims.fr/exl-doc/GED00000024.pdf.

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Afin de satisfaire les besoins industriels en calcul et optimisation des structures, des méthodes de l'optimisation de section et de topologie de structures de poutre ont été étudiées et des logiciels pertinents basés sur ces méthodes ont été développés en utilisant les logiciels MSC/Patran-Nastran comme plate-forme. En combinant la méthode de critère d'optimalité et la méthode de programmation mathématique, différentes méthodes sont utilisées pour traiter les limitations avec différentes propriétés. Le modèle original de l'optimisation de section est transformé en un problème dual selon la th

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25

Dube, Matthew P. "An Embedding Graph for 9-Intersection Topological Spatial Relations." Fogler Library, University of Maine, 2009. http://www.library.umaine.edu/theses/pdf/DubeMP2009.pdf.

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26

Valentini, Stefano. "Transport properties in multi-terminal topological superconductors." Doctoral thesis, Scuola Normale Superiore, 2017. http://hdl.handle.net/11384/85902.

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[excerpt from the introduction:] This PhD thesis project is set in the broad area of mesoscopic physics, which deals with systems with size of few nanometers up to some micrometers. In particular, we focus on hybrid structures composed of superconductors and normal metals or semiconductors.

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27

Saikia, Himangshu. "Comparison and Tracking Methods for Interactive Visualization of Topological Structures in Scalar Fields." Doctoral thesis, KTH, Beräkningsvetenskap och beräkningsteknik (CST), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-216375.

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Scalar fields occur quite commonly in several application areas in both static and time-dependent forms. Hence a proper visualization of scalar fieldsneeds to be equipped with tools to extract and focus on important features of the data. Similarity detection and pattern search techniques in scalar fields present a useful way of visualizing important features in the data. This is done by isolating these features and visualizing them independently or show all similar patterns that arise from a given search pattern. Topological features are ideal for this purpose of isolating meaningful patterns

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28

Veeramalai, Mallika. "A novel method for comparing topological models of protein structures enhanced with ligand information." Thesis, University of Glasgow, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443432.

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29

Fang, Qing. "Robust and compact geographic/topological structures for routing and information dissemination in wireless sensor networks /." May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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30

ROSA, DARIO. "From spinors to forms: results on g-structures in supergravity and on topological field theories." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2014. http://hdl.handle.net/10281/55207.

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This thesis is divided in two parts, that can be read separately even if both use the possibility of replacing spinors with differential forms in theories with supersymmetry. The ﬁrst part explores some recent results that have been obtained by applying the G-structure approach to type II supergravities. Using generalized complex geometry it is possible to reformulate the conditions for unbroken supersymmetry in type II supergravity in terms of differential forms. We use this result to ﬁnd a classiﬁcation for AdS7 and AdS6 solutions in type II supergravity. Concerning AdS7 solutions we ﬁnd tha

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31

Thompson, Justin K. "STRUCTURAL, TRANSPORT, AND TOPOLOGICAL PROPERTIES INDUCED AT COMPLEX-OXIDE HETERO-INTERFACES." UKnowledge, 2018. https://uknowledge.uky.edu/physastron_etds/52.

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Complex-oxides have seen an enormous amount of attention in the realm of Condensed Matter Physics and Materials Science/Engineering over the last several decades. Their ability to host a wide variety of novel physical properties has even caused them to be exploited commercially as dielectric, metallic and magnetic materials. Indeed, since the discovery of high temperature superconductivity in the “Cuprates” in the late 1980’s there has been an explosion of activity involving complex-oxides. Further, as the experimental techniques and equipment for fabricating thin films and heterostructures of

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32

Heimes, Andreas Franz [Verfasser], and G. [Akademischer Betreuer] Schön. "Non-equilibrium quasiparticles and topological excitations in hybrid superconducting structures / Andreas Franz Heimes. Betreuer: G. Schön." Karlsruhe : KIT-Bibliothek, 2014. http://d-nb.info/1064940102/34.

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33

Sorba, Fabrizio [Verfasser], and F. R. [Akademischer Betreuer] Klinkhamer. "Nontrivial topological structures of spacetime and implications for particle propagation / Fabrizio Sorba. Betreuer: F. R. Klinkhamer." Karlsruhe : KIT-Bibliothek, 2014. http://d-nb.info/1059157470/34.

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34

Nuzhnaya, Tatyana. "ANALYSIS OF ANATOMICAL BRANCHING STRUCTURES." Diss., Temple University Libraries, 2015. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/322471.

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Computer and Information Science<br>Ph.D.<br>Development of state-of-the-art medical imaging modalities such as Magnetic Resonance Imaging, Computed Tomography, Galactography, MR Diffusion Tensor Imaging, and Tomosynthesis plays an important role for visualization and assessment of anatomical structures. Included among these structures are structures of branching topology such as the bronchial tree in chest computed tomography images, the blood vessels in retinal images and the breast ductal network in x-ray galactograms and the tubular bone patterns in dental radiography. Analysis of such ima

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35

Deymier, Pierre, and Keith Runge. "One-Dimensional Mass-Spring Chains Supporting Elastic Waves with Non-Conventional Topology." MDPI AG, 2016. http://hdl.handle.net/10150/615109.

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There are two classes of phononic structures that can support elastic waves with non-conventional topology, namely intrinsic and extrinsic systems. The non-conventional topology of elastic wave results from breaking time reversal symmetry (T-symmetry) of wave propagation. In extrinsic systems, energy is injected into the phononic structure to break T-symmetry. In intrinsic systems symmetry is broken through the medium microstructure that may lead to internal resonances. Mass-spring composite structures are introduced as metaphors for more complex phononic crystals with non-conventional topolog

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36

Huang, Xueping [Verfasser]. "On stochastic completeness of weighted graphs / Xueping Huang. Fakultät für Mathematik. SFB 701 Spectral Structures and Topological Methods in Mathematics." Bielefeld : Universitätsbibliothek Bielefeld, Hochschulschriften, 2011. http://d-nb.info/1014454670/34.

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37

Miladi, Chaabane Mariem. "Modélisation géométrique et mécanique pour les systèmes mécatroniques." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2014. http://www.theses.fr/2014ECAP0004/document.

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Cette thèse se focalise sur l’application d’une approche topologique pour la modélisation des systèmes mécatroniques. Cette approche permet de dissocier la topologie et la physique afin d’avoir un modèle unifié de représentation de toute la physique d’un système mécatronique. L’approche topologique développée est codée sous le langage MGS (Modèle Général de Système). Ce langage intègre de nouveaux types de valeurs appelées les collections topologiques. Les collections topologiques permettent la représentation de l'état d'un système dynamique et elles sont manipulées par des transformations. Da

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38

Ferris, Andrew J. PhD. "Chiral Induction and Defect Structures in Liquid Crystal Systems." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case159293629900968.

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39

Matthews, Cameron. "Synthesis, crystal structures and molecular modelling of rare earth complexes with bis(2-pyridylmethyl)amine: aim topological analysis and ligand conformation search." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/8230.

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Eight rare earth complexes with bis(2-pyridylmethyl)amine (DPA) were synthesised and recrystallised, under air-sensitive or low moisture conditions. The crystal structures were successfully determined, via SC-XRD, and the asymmetric units of five complexes (1, 3, 5, 6 and 7) were submitted for DFT molecular modelling calculations, which involved geometry optimisation and frequency calculations. The neutral complexes obtained were bis(bis(2-pyridylmethyl)amine)-trichloro-lanthanum(III) [LaCl3(DPA)2] (1), bis(bis(2-pyridylmethyl)amine)-trichloro-cerium(III)) [CeCl3(DPA)2] (2), bis(μ2-chloro)-dia

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40

Rich, Sarah Celeste. "A comparison of crystalline and molten structures of zirconolite (CaZrTi₂O₇), a potential plutonium wasteform medium, by molecular dynamics simulation and topological analysis." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44835.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2008.<br>"June 2008."<br>Includes bibliographical references (p. 52).<br>Molecular dynamics simulations of the ceramic compound zirconolite (CaZrTi₂O₇), a potential crystalline wasteform host for plutonium, were carried out for ideal and experimental crystalline forms and a simulated molten state, and the connectivities of the resulting structures were compared. Local primitive-ring topological clusters were determined for individual atoms, and averages of ring counts were calculated for atom types

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41

Küfner, Sebastian [Verfasser], Friedhelm [Akademischer Betreuer] Bechstedt, Miguel Alexandre Lopes [Akademischer Betreuer] Marques та Thomas Garm [Akademischer Betreuer] Pedersen. "Electronic and topological properties of low-dimensional α-Sn and HgTe structures / Sebastian Küfner. Gutachter: Friedhelm Bechstedt ; Miguel Alexandre Lopes Marques ; Thomas Garm Pedersen". Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2015. http://d-nb.info/1076503063/34.

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42

Chu, Casey. "The Geometry of Data: Distance on Data Manifolds." Scholarship @ Claremont, 2016. https://scholarship.claremont.edu/hmc_theses/74.

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The increasing importance of data in the modern world has created a need for new mathematical techniques to analyze this data. We explore and develop the use of geometry—specifically differential geometry—as a means for such analysis, in two parts. First, we provide a general framework to discover patterns contained in time series data using a geometric framework of assigning distance, clustering, and then forecasting. Second, we attempt to define a Riemannian metric on the space containing the data in order to introduce a notion of distance intrinsic to the data, providing a novel way to prob

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43

Zhu, Xueyun. "Vlist and Ering: compact data structures for simplicial 2-complexes." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50389.

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Various data structures have been proposed for representing the connectivity of manifold triangle meshes. For example, the Extended Corner Table (ECT) stores V+6T references, where V and T respectively denote the vertex and triangle counts. ECT supports Random Access and Traversal (RAT) operators at Constant Amortized Time (CAT) cost. We propose two novel variations of ECT that also support RAT operations at CAT cost, but can be used to represent and process Simplicial 2-Complexes (S2Cs), which may represent star-connecting, non-orientable, and non-manifold triangulations along with dangling

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44

Absmeier, Dominik Eberhard Wolfgang [Verfasser], Gerd [Gutachter] Laures, Björn [Gutachter] Schuster, and Lennart [Gutachter] Meier. "Strictly commutative complex orientations of topological modular forms with level structures / Dominik Eberhard Wolfgang Absmeier ; Gutachter: Gerd Laures, Björn Schuster, Lennart Meier ; Fakultät für Mathematik." Bochum : Ruhr-Universität Bochum, 2021. http://d-nb.info/123681374X/34.

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45

Doutre, Pierre-Thomas. "Comment intégrer et faire émerger des structures architecturées dans l'optimisation de pièces pour la fabrication additive par faisceaux d’électrons." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAI039.

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Grâce à la fabrication additive, il est aujourd'hui possible de fabriquer de nouvelles géométries. Les perspectives offertes par les moyens de fabrications conventionnelles et additives sont très différentes. Des propositions de design très contraintes peuvent devenir beaucoup plus libres avec la fabrication additive. Cette liberté qu'elle offre fait émerger une multitude de possibilités. Dans ce manuscrit, nous nous sommes focalisés sur un type particulier de structures (les octetruss) ainsi que sur les moyens de fabrication EBM (Electron Beam Melting) de la société ARCAM. Les travaux présent

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46

Loing, Vianney. "Stéréotomie et vision artificielle pour la construction robotisée de structures maçonnées complexes." Thesis, Paris Est, 2019. http://www.theses.fr/2019PESC1015/document.

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Ce travail de thèse s'inscrit dans le contexte du développement de la robotique dans la construction. On s’intéresse ici à la construction robotisée de structures maçonnées complexes en ayant recours à de la vision artificielle. La construction sans cintre étant un enjeu important en ce qui concerne la productivité sur un chantier et la quantité de déchets produits, nous explorons, à cet effet, les possibilités qu'offre la rigidité en flexion inhérente aux maçonneries topologiquement autobloquantes. La génération de ces dernières, classique dans le cas plan, est généralisée ici à la conception

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47

Laszczyk, Laurent. "Homogénéisation et optimisation topologique de panneaux architecturés." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00721807.

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La conception sur-mesure de matériaux architecturés à l'échelle du milli/centimètre est une stratégie pour développer des matériaux de structure plus performants vis-à-vis de cahiers des charges multifonctionels. Ce travail de thèse s'intéresse en particulier à la conception optimale de panneaux architecturés périodiques, dans le but de combiner des exigences mécaniques de flexion et de cisaillement, ainsi que de conductivité thermique. Le comportement élastique peut être prédit grâce à l'identification sur la cellule périodique des coefficients de la matrice des souplesses équivalente. Ces ca

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Benzerga, Mohamed. "Structures réelles sur les surfaces rationnelles." Thesis, Angers, 2016. http://www.theses.fr/2016ANGE0081.

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Le but de cette thèse est d’apporter des éléments de réponse au problème de la finitude du nombre de classes de R-isomorphisme de formes réelles d’une surface rationnelle projective complexe lisse X quelconque, i.e. du nombre de classes d’isomorphisme de R-schémas dont le complexifié est isomorphe à X. Nous étudions ce problème en termes de structures réelles (ou involutions antiholomorphes, généralisant la conjugaison complexe) sur X : l’intérêt de cette approche est qu’elle permet une réécriture du problème faisant intervenir les groupes d’automorphismes de surfaces rationnelles, à travers l

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Deneffle, Romain. "Définition d'une méthodologie d'allègement de structures sous contrainte de rigidité fonctionnelle, cas d'une machine-outil." Thesis, Université Clermont Auvergne‎ (2017-2020), 2017. http://www.theses.fr/2017CLFAC022.

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En réponse à des contraintes écologiques et économiques de plus en plus forte dans l’industrie, la problématique de réduction et de maîtrise de la consommation énergétique est aujourd’hui prise en considération dans le domaine de la machine-outil. Cette thèse s’inscrit dans le cadre du projet Green HSM porté par l’entreprise PCI-SCEMM ayant pour but de réduire la consommation énergétique d’une machine-outil de 30%. L’étude s’est focalisée sur le thème spécifique de l’allègement de structure. L’objectif est de concevoir des structures de machines-outils avec des masses mobiles les plus faibles

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Soler, Maxime. "Réduction et comparaison de structures d'intérêt dans des jeux de données massifs par analyse topologique." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS364.

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Dans cette thèse, nous proposons différentes méthodes, basées sur l'analyse topologique de données, afin de répondre aux problématiques modernes concernant l'analyse de données scientifiques. Dans le cas de données scalaires, extraire un savoir pertinent à partir de données statiques, de données qui varient dans le temps, ou données d'ensembles s'avère de plus en plus difficile. Nos approches pour la réduction et l'analyse de telles données reposent sur l'idée de définir des structures d'intérêt dans les champs scalaires à l’aide d’abstractions topologiques. Dans un premier temps, nous proposo

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