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Rozprawy doktorskie na temat „Structure Geometry”

Autor: Grafiati

Data publikacji: 5 czerwca 2025

Data aktualizacji: 1 sierpnia 2025

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1

Knox, Eleanor. "Geometry, inertia and spacetime structure." Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.527342.

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2

Davis, Robert Tucker. "Geometric Build-up Solutions for Protein Determination via Distance Geometry." TopSCHOLAR®, 2009. http://digitalcommons.wku.edu/theses/102.

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Proteins carry out an almost innumerable amount of biological processes that are absolutely necessary to life and as a result proteins and their structures are very often the objects of study in research. As such, this thesis will begin with a description of protein function and structure, followed by brief discussions of the two major experimental structure determination methods. Another problem that often arises in molecular modeling is referred to as the Molecular Distance Geometry Problem (MDGP). This problem seeks to find coordinates for the atoms of a protein or molecule when given on

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3

Cifuentes, Pardo Diego Fernando. "Polynomial systems : graphical structure, geometry, and applications." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/115633.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 199-208).<br>Solving systems of polynomial equations is a foundational problem in computational mathematics, that has several applications in the sciences and engineering. A closely related problem, also prevalent in applicat

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4

Smellie, Andrew S. "Distance geometry : new methods and applications." Thesis, Queen's University Belfast, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236162.

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5

Huesgen, Brian. "Structure and synthesis of four supramolecular structures involving Cu(I) and 4,7-phenanthroline." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4965.

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Thesis (M.S.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed Oct. 26, 2007). Vita. Includes bibliographical references.

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6

Backley, Philip. "Tier geometry : an explanatory model of vowel structure." Thesis, University College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299862.

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7

Del, Río Fernández Miguel Ángel. "Structure and geometry in sequence-processing neural networks." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/129881.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, February, 2020<br>Cataloged from student-submitted PDF of thesis. Pages 166 and 167 are blank.<br>Includes bibliographical references (pages 161-165).<br>Recent success of state-of-the-art neural models on various natural language processing (NLP) tasks has spurred interest in understanding their representation space. In the following chapters we will use various techniques of representational analysis to understand the nature of neural-network based language modelling. To introdu

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8

Müller, Matthias H. "The structure of dense polymer systems : geometry, algorithms, software /." [S.l.] : [s.n.], 1999. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13096.

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9

Bean, R. J. "Domain structure imaging by Bragg geometry X-ray ptychography." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1418466/.

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Domain structure in materials is important for their physical properties, technological uses and response to external perturbations. Domains are small regions within a material with a consistent atomic structure that may have different ordering origins or different orientations. Domain structure is present in any material which exhibits super-structure ordering with correlation lengths shorter than the extent of the sample. The domain size is controlled by the strength of the ordering interactions and growth conditions. Domains are present in a huge range of materials from con¬densed matter to

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10

Roulet, Vincent. "On the geometry of optimization problems and their structure." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLEE069/document.

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Dans de nombreux domaines tels que l’apprentissage statistique, la recherche opérationnelle ou encore la conception de circuits, une tâche est modélisée par un jeu de paramètres que l’on cherche à optimiser pour prendre la meilleure décision possible. Mathématiquement, le problème revient à minimiser une fonction de l’objectif recherché par des algorithmes itératifs. Le développement de ces derniers dépend alors de la géométrie de la fonction ou de la structure du problème. Dans une première partie, cette thèse étudie comment l’acuité d’une fonction autour de ses minima peut être exploitée par

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11

Machat, Mohamed. "Computational geometry for the determination of biomolecular structures." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066359/document.

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En bioinformatique structurale, une partie des méthodes computationnelles qui calculent les structures de protéines à l'aide de données expérimentales, effectuent une optimisation de la position des atomes sous les contraintes expérimentales mesurées sur le système étudié, ainsi que sous des contraintes provenant de la connaissance générique de la stéréochimie organique. Ces méthodes d'optimisation présentent l'inconvénient de ne pas garantir la détermination de la meilleure solution. De plus, la validation de l'optimisation se fait en comparant les résultats obtenus pour des calculs répétés,

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12

Machat, Mohamed. "Computational geometry for the determination of biomolecular structures." Electronic Thesis or Diss., Paris 6, 2017. http://www.theses.fr/2017PA066359.

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En bioinformatique structurale, une partie des méthodes computationnelles qui calculent les structures de protéines à l'aide de données expérimentales, effectuent une optimisation de la position des atomes sous les contraintes expérimentales mesurées sur le système étudié, ainsi que sous des contraintes provenant de la connaissance générique de la stéréochimie organique. Ces méthodes d'optimisation présentent l'inconvénient de ne pas garantir la détermination de la meilleure solution. De plus, la validation de l'optimisation se fait en comparant les résultats obtenus pour des calculs répétés,

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13

Montalvão, Rinaldo Wander. "Protein structure prediction : differential geometry of proteins and comparative modelling." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613753.

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14

Aliaga, Varea Ramón José. "Geometry and structure of Lipschitz-free spaces and their biduals." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/159256.

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[ES] Los espacios libres Lipschitz F(M) son linearizaciones canónicas de espacios métricos M cualesquiera. Más concretamente, F(M) es el único espacio de Banach que contiene una copia isométrica de M que es linearmente densa, y tal que toda aplicación Lipschitz de M en cualquier espacio de Banach X puede extenderse a un operador linear continuo de F(M) en X. Estos espacios suponen una herramienta muy potente para el estudio de la geometría no lineal de espacios de Banach, al permitir la aplicación de las técnicas lineales clásicas, bien conocidas, a problemas no lineales. Pero este esfuerzo só

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15

Huda, Khoirul. "STUDY ON TWO-PHASE FLOW STRUCTURE IN ROD BUNDLE GEOMETRY." Kyoto University, 1999. http://hdl.handle.net/2433/181807.

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16

Cosserat, Oscar. "Theory and Construction of Structure Preserving Integrators in Poisson Geometry." Electronic Thesis or Diss., La Rochelle, 2023. http://www.theses.fr/2023LAROS018.

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Nous introduisons pour toute structure de Poisson sur une variété la notion de bi-réalisation et l'illustrons par des exemples. Nous définissons les intégrateurs de Poisson hamiltoniens comme des intégrateurs de Poisson dont la trajectoire discrète suit le flot d'un hamiltonien dépendant du temps. Ensuite, une construction d'intégrateur de Poisson hamiltonien pour une structure de Poisson, un Hamiltonien H, un ordre k et un pas de temps t quelconques est donnée via une troncature à l'ordre k de la transformée de Hamilton-Jacobi S¬t(H) de H sur une bi-réalisation de la structure de Poisson. Nou

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17

Bergvall, Olof. "Cohomology of the moduli space of curves of genus three with level two structure." Licentiate thesis, Stockholms universitet, Matematiska institutionen, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-103062.

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In this thesis we investigate the moduli space M3[2] of curves of genus 3 equipped with a symplectic level 2 structure. In particular, we are interested in the cohomology of this space. We obtain cohomological information by decomposing M3[2] into a disjoint union of two natural subspaces, Q[2] and H3[2], and then making S7- resp. S8-equivariantpoint counts of each of these spaces separately.<br>Målet med denna uppsats är att undersöka modulirummet M3[2] av kurvor av genus 3 med symplektisk nivå 2 struktur. Mer specifikt vill vi hitta informationom kohomologin av detta rum. För att uppnå detta

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18

Butler, Joe R. "The Torus Does Not Have a Hyperbolic Structure." Thesis, University of North Texas, 1992. https://digital.library.unt.edu/ark:/67531/metadc500333/.

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Several basic topics from Algebraic Topology, including fundamental group and universal covering space are shown. The hyperbolic plane is defined, including its metric and show what the "straight" lines are in the plane and what the isometries are on the plane. A hyperbolic surface is defined, and shows that the two hole torus is a hyperbolic surface, the hyperbolic plane is a universal cover for any hyperbolic surface, and the quotient space of the universal cover of a surface to the group of automorphisms on the covering space is equivalent to the original surface.

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19

Bumajdad, Ali Y. E. A. "Phase structure and interfacial composition of mixed surfactant microemulsions." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322358.

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20

D'Souza, Nicola Laila. "Natural forms through geometry and structure design of the parachute pavilion /." Cincinnati, Ohio : University of Cincinnati, 2005. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1116255406.

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21

Crnkic, Edin. "Geometry guided phase transition pathway and stable structure search for crystals." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44760.

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Recently a periodic surface model was developed to assist geometric construction in computer-aided nano-design. This implicit surface model helps create super-porous nano structures parametrically and support crystal packing. In this thesis, a new approach for pathway search in phase transition simulation of crystal structures is proposed. The approach relies on the interpolation of periodic loci surface models. Respective periodic plane models are reconstructed from the positions of individual atoms at the initial and final states, and surface correspondence is found using a Simulated Anneali

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22

Al-Solamy, F. R. M. "The geometry and algebraic structure of solitons in the chiral equation." Thesis, Swansea University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.635730.

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This thesis is concerned with the behaviour of interacting solitons in the principal chiral model. It also discusses symplectic forms and Hopf algebras associated to solitons. In Chapter 1, we present some background material and definitions which will be used in the following chapters. In Chapter 2, we study the behaviour of the solitons in the principal chiral model by both pictures and calculations. Examples of soliton decay and interactions on collision are given. In Chapter 3, we give calculations to define a 2-form over the phase space of the chiral solitons using the language of inverse

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23

Avila, Victor Manuel. "Geophysical constraints on the Hueco and Mesilla Bolsons| Structure and geometry." Thesis, The University of Texas at El Paso, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10133864.

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<p> The Hueco and Mesilla Bolsons are part of the intramountain basins of the Rio Grande Rift system. These bolsons are the primary source of groundwater for the El Paso-Ciudad Juarez metropolitan area and contain faults that show evidence of repeated earthquakes during the Quaternary. The region is also associated with has low-level (M<4) seismicity. The collection and analysis of precision gravity data, coupled with information from water wells, multichannel analysis of surface waves (MASW) studies and previously published seismic reflection lines, have been used to examine the structu

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24

D’souza, Nicola Laila. "Natural Forms Through Geometry and Structure: Design of the Parachute Pavilion." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1116255406.

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25

Newsome, Ian M. "GEODESIC STRUCTURE IN SCHWARZSCHILD GEOMETRY WITH EXTENSIONS IN HIGHER DIMENSIONAL SPACETIMES." VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5414.

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From Birkoff's theorem, the geometry in four spacetime dimensions outside a spherically symmetric and static, gravitating source must be given by the Schwarzschild metric. This metric therefore satisfies the Einstein vacuum equations. If the mass which gives rise to the Schwarzschild spacetime geometry is concentrated within a radius of r=2M, a black hole will form. Non-accelerating particles (freely falling) traveling through this geometry will do so along parametrized curves called geodesics, which are curved space generalizations of straight paths. These geodesics can be found by solving th

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26

Dunne, Barry John. "Structural deformations in phosphorus and nitrogen complexes." Thesis, University of Bristol, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.346442.

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27

Auf, der Heyde Thomas Paul Edwin. "The molecular geometry of d⁸ five-coordination : an analysis of static deformations." Doctoral thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/17046.

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Includes bibliographical references.<br>The geometries of the ML₅ fragments in 196 five-coordinate metal complexes (M = Ni(II), Pd(II), Pt(II), Rh(I), Ir(I); L = coordinated ligand atom) have been studied using multi-variate statistical techniques. For each molecular fragment the geometry has been precisely described by two sets of twelve non-redundant symmetry coordinates.

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28

Hatzidimitriou, D. "The evolution and geometry of the oouter parts of the Small Magellanic Cloud." Thesis, University of Edinburgh, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234097.

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29

Rubio, Roberto. "Generalized geometry of type Bn." Thesis, University of Oxford, 2014. https://ora.ox.ac.uk/objects/uuid:e0e48bb4-ea5c-4686-8b91-fcec432eb89a.

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Generalized geometry of type B<sub>n</sub> is the study of geometric structures in T+T<sup>&ast;</sup>+1, the sum of the tangent and cotangent bundles of a manifold and a trivial rank 1 bundle. The symmetries of this theory include, apart from B-fields, the novel A-fields. The relation between B<sub>n</sub>-geometry and usual generalized geometry is stated via generalized reduction. We show that it is possible to twist T+T<sup>&ast;</sup>+1 by choosing a closed 2-form F and a 3-form H such that dH+F<sup>2</sup>=0. This motivates the definition of an odd exact Courant algebroid. When twisting,

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30

Masiyandima, Mutsa Cecelia. "The effect of tine geometry on soil physical properties." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23284.

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The physical state of the seedbed is of importance to the plant environment as it influences some important processes in the soil such as seedling emergence, water and solute transport, and ease of root penetration. This is affected to a large extent by tillage process, the tillage implement type and the geometry of the implement used.<br>A field experiment was carried out on a clay soil to determine the effect of the geometry of bladed tillage implements on some soil physical properties after tillage. The soil properties evaluated were bulk density, mean clod size distribution and total pore

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31

Averkiev, Boris. "Geometry and Electronic Structure of Doped Clusters via the Coalescence Kick Method." DigitalCommons@USU, 2009. http://digitalcommons.usu.edu/etd/408.

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Developing chemical bonding models in clusters is one of the most challenging tasks of modern theoretical chemistry. There are two reasons for this. The first one is that clusters are relatively new objects in chemistry and have been extensively studied since the middle of the 20th century. The second reason is that clusters require high-level quantum-chemical calculations; while for many classical molecules their geometry and properties can be reasonably predicted by simpler methods. The aim of this dissertation was to study doped clusters and explain their chemical bonding. The research was

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32

Maswaure, Justin. "Tillage forces and soil loosening as influenced by tool geometry." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23411.

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A field tillage tool carrier was constructed using a tractor trailer, hydraulic cylinder and steel construction material. Tillage tool blades of varying lengths, widths and angles of attack were fabricated from steel and were used in the study of the effect of tool rake angle, tool width and depth of operation on soil strength properties, draft, draft efficiency, volume of soil manipulated, degree of soil loosening and penetration resistance.<br>The results showed that the draft increased with tool rake angle and width. Operating at a depth of 150 mm and 100 mm depth did not make any significa

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33

Desroches, Maude. "Exploiting the geometry of anthanthrone to harness optoelectronic properties." Doctoral thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/29995.

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Depuis quelques années, un intérêt marqué pour les pigments de cuve a fait son apparition dans la littérature. Longtemps considérés comme des produits destinés exclusivement à la chimie fine industrielle, les pigments sont de plus en plus utilisés en recherche académique. Ils sont produits à l’échelle de la tonne pour des sommes avantageuses et leurs structures complexes permettent d’accéder à des molécules prisées en peu d’étapes synthétiques. La plupart de ces pigments sont des hydrocarbures aromatiques polycycliques possédant parfois des hétéroatomes, ce qui en fait des molécules de choix p

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34

Nave, Jr Gary Kirk. "Nonlinear Models and Geometric Structure of Fluid Forcing on Moving Bodies." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/84945.

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This dissertation presents useful nonlinear models for fluid forcing on a moving body in two distinct contexts, and methods for analyzing the geometric structure within those and other mathematical models. This manuscript style dissertation presents three works within the theme of understanding fluid forcing and geometric structure. When a bluff body is free to move in the presence of an incoming bluff body wake, the average forcing on the body is dependent on its position relative to the upstream bluff body. This position-dependent forcing can be conceptualized as a stiffness, much like a

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35

Yang, Wenzhe. "The arithmetic geometry of mirror symmetry and the conifold transition." Thesis, University of Oxford, 2018. http://ora.ox.ac.uk/objects/uuid:e55a7b22-a268-4c57-9d98-c0547ecdcef9.

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The central theme of this thesis is the application of mirror symmetry to the study of the arithmetic geometry of Calabi-Yau threefolds. It formulates a conjecture about the properties of the limit mixed Hodge structure at the large complex structure limit of an arbitrary mirror threefold, which is supported by a two-parameter example of a self-mirror Calabi-Yau threefold. It further studies the connections between this conjecture with Voevodsky's mixed motives. This thesis also studies the connections between the conifold transition and Beilinson's conjecture on the values of the L-functions

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36

Petitjean, Colin. "Some aspects of the geometry of Lipschitz free spaces." Thesis, Bourgogne Franche-Comté, 2018. http://www.theses.fr/2018UBFCD006/document.

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Quelques aspects de la géométrie des espaces LipschitzEn premier lieu, nous donnons les propriétés fondamentales des espaces Lipschitz libres. Puis, nous démontrons que l'image canonique d'un espace métrique M est faiblement fermée dans l'espace libre associé F(M). Nous prouvons un résultat similaire pour l'ensemble des molécules.Dans le second chapitre, nous étudions les conditions sous lesquelles F(M) est isométriquement un dual. En particulier, nous généralisons un résultat de Kalton sur ce sujet. Par la suite, nous nous focalisons sur les espaces métriques uniformément discrets et sur les

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37

Eastaughffe, Katherine A. "The geometry of interaction as a theory of cut elimination with structure-sharing." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297075.

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Rabi, Reuben. "Mixed Hodge structure on the fundamental group and geometry of divisors on curves." Thesis, King's College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362584.

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El, Hassan M. "The geometry and structure of DNA and its role in DNA/protein recognition." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361765.

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40

Baskett, Ryan. "Effects of Support Structure Geometry on SLM Induced Residual Stresses in Overhanging Features." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1780.

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Selective laser melting (SLM) is a new and rapidly developing manufacturing method for producing full-density, geometrically complex metal parts. The SLM process is time and cost effective for small-scale production; however, wide-spread adoption of this technique is severely limited by residual stresses that can cause large deformations and in-process build failures. The issues associated with residual stress accumulation are most apparent in parts with overhanging features. Due to the complexity of the SLM process, the accumulation of residual stresses is difficult to assess a priori. The de

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41

Preston, Leiph Alexander. "Simultaneous inversion of 3D velocity structure, hypocenter locations, and reflector geometry in Cascadia /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/6816.

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42

Johnston, Jason Clift. "Systematic Homonymy and the Structure of Morphological Categories: Some Lessons from Paradigm Geometry." Thesis, The University of Sydney, 1996. http://hdl.handle.net/2123/396.

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This thesis takes as its starting point proposals to model inflectional paradigms as geometrical structures, wherein systematic homonymies are constrained to occupy contiguous regions. It defines a precise criterion for assessing systematicity and shows, for a range of largely Indo-European and Afro-Asiatic data, that such models are observationally adequate in modelling systematic homonymies within a single inflectional dimension, and to a lesser extent, between different inflectional dimensions. This is taken to indicate that widely assumed characterizations of inflectional categories in ter

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43

Johnston, Jason Clift. "Systematic Homonymy and the Structure of Morphological Categories: Some Lessons from Paradigm Geometry." University of Sydney, Linguistics, 1996. http://hdl.handle.net/2123/396.

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This thesis takes as its starting point proposals to model inflectional paradigms as geometrical structures, wherein systematic homonymies are constrained to occupy contiguous regions. It defines a precise criterion for assessing systematicity and shows, for a range of largely Indo-European and Afro-Asiatic data, that such models are observationally adequate in modelling systematic homonymies within a single inflectional dimension, and to a lesser extent, between different inflectional dimensions. This is taken to indicate that widely assumed characterizations of inflectional categories in ter

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44

Usatine, Jeremy. "Arithmetical Graphs, Riemann-Roch Structure for Lattices, and the Frobenius Number Problem." Scholarship @ Claremont, 2014. http://scholarship.claremont.edu/hmc_theses/57.

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If R is a list of positive integers with greatest common denominator equal to 1, calculating the Frobenius number of R is in general NP-hard. Dino Lorenzini defines the arithmetical graph, which naturally arises in arithmetic geometry, and a notion of genus, the g-number, that in specific cases coincides with the Frobenius number of R. A result of Dino Lorenzini's gives a method for quickly calculating upper bounds for the g-number of arithmetical graphs. We discuss the arithmetic geometry related to arithmetical graphs and present an example of an arithmetical graph that arises in this contex

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FARACO, Gianluca. "The Geometry Awakens: on the relationship between holonomy and hyperbolic structures." Doctoral thesis, Università degli studi di Ferrara, 2018. http://hdl.handle.net/11392/2487998.

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This thesis examines the relationship between branched hyperbolic structures on surfaces and representations of the fundamental group into $\pslr$. A branched hyperbolic structure on a surface $S$ is a hyperbolic cone-structure such that the angle around any interior cone point is an integer multiple of $2\pi$.\\ Any such structure determines a holonomy representation of the fundamental group $\rho:\pi_1S\longrightarrow \pslr$. We ask, conversely, when a representation of the fundamental group arises as holonomy of a branched hyperbolic structure. We consider only $2-$dimensional hyperbolic st

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Gibbs, Nicholas. "Ab initio protein tertiary structure prediction using restricted ramachandran geometries and physio-chemical potentials." Thesis, University of Bristol, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340353.

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Leung, Ai-chi Angela. "Atomic structure studies of holmium on SI(111) surface by low energy electron diffraction Patterson inversion at multiple incident angles." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/HKUTO/record/B39558824.

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Clinch, Katharine. "Global rigidity and symmetry of direction-length frameworks." Thesis, Queen Mary, University of London, 2018. http://qmro.qmul.ac.uk/xmlui/handle/123456789/36663.

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A two-dimensional direction-length framework (G; p) consists of a multigraph G = (V ;D;L) whose edge set is formed of "direction" edges D and "length" edges L, and a realisation p of this graph in the plane. The edges of the framework represent geometric constraints: length edges x the distance between their endvertices, whereas direction edges specify the gradient of the line through both endvertices. In this thesis, we consider two problems for direction-length frameworks. Firstly, given a framework (G; p), is it possible to nd a di erent realisation of G which satis es the same direction an

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Lao, Yizhen. "3D Vision Geometry for Rolling Shutter Cameras." Thesis, Université Clermont Auvergne‎ (2017-2020), 2019. http://www.theses.fr/2019CLFAC009/document.

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De nombreuses caméras CMOS modernes sont équipées de capteurs Rolling Shutter (RS). Ces caméras à bas coût et basse consommation permettent d’atteindre de très hautes fréquences d’acquisition. Dans ce mode d’acquisition, les lignes de pixels sont exposées séquentiellement du haut vers le bas de l'image. Par conséquent, les images capturées alors que la caméra et/ou la scène est en mouvement présentent des distorsions qui rendent les algorithmes classiques au mieux moins précis, au pire inutilisables en raison de singularités ou de configurations dégénérées. Le but de cette thèse est de revisit

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Alves, Rafael Santos de Oliveira 1982. "Álgebra de Clifford aplicada ao cálculo de estruturas moleculares." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/306802.

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Orientador: Carlile Campos Lavor<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Matemática Estatística e Computação Científica<br>Made available in DSpace on 2018-09-24T19:32:19Z (GMT). No. of bitstreams: 1 Alves_RafaelSantosdeOliveira_D.pdf: 2213205 bytes, checksum: 67a1681eb02b103974e57e3047edc755 (MD5) Previous issue date: 2013<br>Resumo: O Problema de Geometria de Distâncias Moleculares (PGDM) consiste em encontrar uma imersão tridimensional de um grafo simples, não orientado, de forma que o peso nas arestas corresponda às distâncias inter-atômicas de uma molécula

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