Rozprawy doktorskie na temat „Curved surfaces”
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Schoenborn, Oliver Lars. "Phase-ordering kinetics on curved surfaces". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0011/NQ35313.pdf.
Pełny tekst źródłaYu, Guoxin 1968. "Optimal development of doubly curved surfaces". Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9553.
Pełny tekst źródłaIncludes bibliographical references (p. 98-100).
Surfaces of many engineering structures are commonly fabricated as doubly curved shapes to fulfill functional requirements such as hydrodynamic, aesthetic, or structural. Given a three-dimensional design surface, the first step of the fabrication process is flattening or planar development of this surface into a planar shape so that the manufacturer can not only determine the initial shape of the flat plate but also estimate the strain distribution required to form the shape. In this thesis, we develop an algorithm for optimal development of a general doubly curved surface in the sense that the strain from the surface to its planar development is minimized. A planar development corresponding to minimum stretching or shrinkage is highly desirable for the following reasons: (1) it saves material; (2) it reduces the work needed to form the planar shape to the doubly curved design surface. The development process is modeled by tensile strains isoparametric directions, or along principal curvature directions from the curved surface to its planar development. The distribution of the appropriate minimum strain field is obtained by solving a constrained nonlinear programming problem. Based on the strain distribution and the coefficients of the first fundamental form of the curved surface, another unconstrained nonlinear programming problem is solved to obtain the optimal developed planar shape. Convergence, complexity, and accuracy of the algorithm are studied. Examples show the effectiveness of this algorithm.
by Guoxin Yu.
S.M.
Streubel, Robert. "Imaging Spin Textures on Curved Magnetic Surfaces". Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-178266.
Pełny tekst źródłaOne of the foci of modern materials sciences is set on expanding conventional two-dimensional electronic, photonic, plasmonic and magnetic devices into the third dimension. This approach provides means to modify conventional or to launch novel functionalities by tailoring curvature and three-dimensional (3D) shape. The degree of effect is particularly high for vector properties like the magnetization due to an emergent inversion symmetry breaking. Aside from capabilities to design and synthesize 3D magnetic architectures, proper characterization methods, such as magnetic tomographic imaging techniques, need to be developed to obtain a thorough understanding of the system’s response under external stimuli. The main objective of this thesis is to develop a visualization technique that provides nanometer spatial resolution to image the peculiarities of the magnetic domain patterns on extended 3D curved surfaces. The proposed and realized concept of magnetic soft X-ray tomography (MXT), based on the X-ray magnetic circular dichroism (XMCD) effect with soft X-ray microscopies, has the potential to become a powerful tool to investigate element specifically an entirely new class of 3D magnetic objects with virtually any shape and magnetization. Imaging curved surfaces meets the challenge of three-dimensionality and requires a profound understanding of the recorded XMCD contrast. These experiences are gained by visualizing magnetic domain patterns on two distinct 3D curved surfaces, namely magnetic cap structures and rolled-up magnetic nanomembranes with cylindrical shape. The capability of MXT is demonstrated by reconstructing the magnetic domain patterns on 3D curved surfaces resembling hollow cylindrical objects
Chia, Yan Wah. "Radiation from curved (conical) frequency selective surfaces". Thesis, Loughborough University, 1993. https://dspace.lboro.ac.uk/2134/7200.
Pełny tekst źródłaWang, Qiang. "Atmospheric refraction and propagation over curved surfaces". n.p, 1997. http://ethos.bl.uk/.
Pełny tekst źródłaWang, Qiang. "Atmospheric refraction and propagation over curved surfaces". Thesis, Open University, 1998. http://oro.open.ac.uk/44453/.
Pełny tekst źródłaChelliah, Joel Eelaraj. "Parallel Methods for Projection on Strongly Curved Surfaces". Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for datateknikk og informasjonsvitenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-14979.
Pełny tekst źródłaWaddell, Rachel C. "Radar cross section synthesis of doubly curved surfaces". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA305445.
Pełny tekst źródłaSkau, Karl Isak. "Polymer adsorption on curved surfaces : mean field theories /". [S. l.] : [s. n.], 2003. http://catalogue.bnf.fr/ark:/12148/cb39299054x.
Pełny tekst źródłaNutter, Jamie Ian. "The stability of boundary layers on curved surfaces and surfaces involving abrupt changes". Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/26907.
Pełny tekst źródłaTemmerman, L. "Large eddy simulation of separating flows from curved surfaces". Thesis, Queen Mary, University of London, 2004. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1833.
Pełny tekst źródłaJung, Markus Manfred. "Assessment of curved, rotationally symmetric surfaces in three dimensions". Thesis, University of Southampton, 1999. https://eprints.soton.ac.uk/47538/.
Pełny tekst źródłaLuo, Jian Yang. "Calculation of turbulent shear layers over highly curved surfaces". Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/11500.
Pełny tekst źródłaYang, Chang-Gui. "Algorithms for making realistic images of curved surfaces by computer". Thesis, University of Hull, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278495.
Pełny tekst źródłaSmith, Jr Philip T. "ANALYSIS AND APPLICATION OF CAPACITIVE DISPLACEMENT SENSORS TO CURVED SURFACES". UKnowledge, 2003. http://uknowledge.uky.edu/gradschool_theses/311.
Pełny tekst źródłaLiu, X. "Shock/boundary-layer interaction on curved surfaces at transonic speeds". Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332125.
Pełny tekst źródłaSmith, Philip T. "Analysis and application of capacitive displacment sensors to curved surfaces". Lexington, Ky. : [University of Kentucky Libraries], 2003. http://lib.uky.edu/ETD/ukymeen2003t00113/ptsmith.pdf.
Pełny tekst źródłaTitle from document title page (viewed Sept. 10, 2004). Document formatted into pages; contains x, 146 p. : ill. Includes abstract and vita. Includes bibliographical references (p. 143-144).
Tennander, David. "Automatic Projector Calibration for Curved Surfaces Using an Omnidirectional Camera". Thesis, KTH, Optimeringslära och systemteori, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209675.
Pełny tekst źródłaDenna rapport presenterar en metod för att motverka de distorsioner som uppkommer när en bild projeseras på en icke plan yta. Genom att använda en omnidirectional kamera kan en omslutande dome upplyst av flertalet projektorer bli kalibrerad. Kameran modellerades med The Unified Projection Model då modellen går att anpassa för ett stort antal kamerasystem. Projektorernas bild på ytan lästes av genom att använda Gray kod och sedan beräknades den optimala mittpunkten för den kalibrerade bilden genom att numeriskt lösa ett kvadratiskt NLP problem. Till slut skapas en Spline yta som motvärkar projektionsförvrängningen genom FAST-LTS regression. I den experimentella uppställningen användes en RICOH THETA S kamera som kalibrerades men omnidir modulen i openCV. Ett enligt författarna lyckat resultat uppnåddes och vid överlappning av flertalet projektorer så mättes ett maximalt fel på 0.5° upp. Vidare mätningar antyder att delar av detta fel uppkommit på grund av saknad noggrannhet i utrustningen under evalueringsfasen. Resultatet ses som lyckat och den utvecklade applikationen kommer att användas av ÅF Technology AB vid deras calibrering av flygsimulatorer.
Charlebois, Mark A. "Exploring the shape of objects with curved surfaces using tactile sensing". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq24105.pdf.
Pełny tekst źródłaHernandez-Ontiveros, Cesar F. "Numerical analysis of heat transfer during jet impingement on curved surfaces". [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002123.
Pełny tekst źródłaWong, H. Y. W. "Shear-free turbulence and secondary flow near angled and curved surfaces". Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234135.
Pełny tekst źródłaCheung, Yim Lui. "Growth and charaterisation of multilayer YBCO coated conductors on curved surfaces". Thesis, University of Birmingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.489288.
Pełny tekst źródłaBell, Duncan J. "Improving the matching of latent fingerprints on tightly curved surfaces using stereopsis". Thesis, University of Sheffield, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540935.
Pełny tekst źródłaAlbarrán, Arriagada Octavio Eduardo, i Arriagada Octavio Eduardo Albarrán. "Curling dynamics of naturally curved surfaces : axisymmetric bio-membranes and elastic ribbons". Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2013. http://tel.archives-ouvertes.fr/tel-00997537.
Pełny tekst źródłaRoland, Jason Howard. "Forced Convection Over Flat and Curved Isothermal Surfaces with Unheated Starting Length". University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1418343439.
Pełny tekst źródłaAlbarrán, Arriagada Octavio Eduardo. "Curling dynamics of naturally curved surfaces : axisymmetric bio-membranes and elastic ribbons". Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20055/document.
Pełny tekst źródłaCurling deformation of thin elastic surfaces appears in numerous natural and man-made structures where a spontaneous curvature is present. In this thesis, we couple theoretical approaches and macroscopic experiments on elastic ribbons to understand the dynamics of curling of opened bio-membranes, motivated by the need to better understand recent microscopic observations during egress of Malaria infected red blood cells (MIRBC) and bursting of artificial polymersomes.In a first part, we study theoretically pore stability and curling propagation of an initially opened spherical bio-membrane. We model geometrically curling deformation as the revolution of a decentered Archimedean spiral, leading to a prescribed toroidal wrapping of the membrane. In this configuration, we show how the stability of a pore to curling depends strongly on both line-tension and shear elasticity and we discuss these results in relation to the curling of MIRBCs membranes. Moreover, taking into account viscous dissipations, the consequent dynamics we calculate agrees quantitatively well with experimental data obtained during opening of MIRBCs. Our approach shows in particular how the membrane dissipation resulting from the surface redistribution dominates curling dynamics over outer viscous dissipation.However, the complexity of the spherical geometry and the lack of detailed images in microscopic observations hamper the development of more accurate models where the coupling between flow and deformation is fully understood. Subsequently, we study in a second part the curling deformation of macroscopic naturally curved elastic ribbons in different viscous media and elastic conditions. At high Reynolds numbers, due to the tendency of ribbons to localize bending deformations when a curling front travels down the material, we show that curling reaches rapidly a constant propagating velocity. In this regime, the ribbon wraps itself into a compact roll whose size is predicted through the solitary wave solution of the associated Elastica. At low Reynolds numbers, however, closer to the hydrodynamic conditions of curling in microscopic membranes, we show that the strong lubrication forces induce a non-compact curling. The overall size of the spiraling ribbon increases in time leading to a temporal decrease of the released elastic power and therefore a consequent decrease in velocity. We discuss how such discovery sheds a new light on the modeling of curling in MIRBCs and polymersomes
Smith, Philip T. "Capacitance metrology of curved surfaces study and characterization of a novel probe design /". Lexington, Ky. : [University of Kentucky Libraries], 2007. http://hdl.handle.net/10225/745.
Pełny tekst źródłaTitle from document title page (viewed on March 24, 2008). Document formatted into pages; contains: xii, 253 p. : ill (some col.). Includes abstract and vita. Includes bibliographical references (p. 244-251).
Smith, Jr Philip T. "CAPACITANCE METROLOGY OF CURVED SURFACES: STUDY AND CHARACTERIZATION OF A NOVEL PROBE DESIGN". UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_diss/570.
Pełny tekst źródłaZogbi, George C. "Reflection and diffraction of general astigmatic Gaussian beams from curved surfaces and edges /". The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1303147091.
Pełny tekst źródłaLee, Young-Lim. "The Perception and Recognition of 3-D Shape from Shadows Cast onto Curved Surfaces". TopSCHOLAR®, 2003. http://digitalcommons.wku.edu/theses/609.
Pełny tekst źródłaMark, Lewis Paul. "Carbon nanotubes and other highly curved surfaces for field emission and field-promoted ionisation". Thesis, University of Warwick, 2009. http://wrap.warwick.ac.uk/3170/.
Pełny tekst źródłaNelson, Todd G. "Art to Engineering: Curved Folding and Developable Surfaces in Mechanism and Deployable Structure Design". BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6865.
Pełny tekst źródłaSupreeti, Shraddha [Verfasser], Stefan [Akademischer Betreuer] Sinzinger, Martin [Akademischer Betreuer] Hoffmann i Steffen [Akademischer Betreuer] Strehle. "Soft nanoimprint lithography on curved surfaces / Shraddha Supreeti ; Stefan Sinzinger, Martin Hoffmann, Steffen Strehle". Ilmenau : TU Ilmenau, 2021. http://d-nb.info/1239051182/34.
Pełny tekst źródłaGao, Zaixiang. "The numerical treatment of curved boundary surfaces in an unfitted grid formulation for computational fluid dynamics". Thesis, Cranfield University, 1999. http://hdl.handle.net/1826/3405.
Pełny tekst źródłaCoe, Edward Olin. "Printing on Objects: Curved Layer Fused Filament Fabrication on Scanned Surfaces with a Parallel Deposition Machine". Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/101096.
Pełny tekst źródłaMaster of Science
Shellabarger, Brian Tebelman. "Experimental studies of high-speed liquid films on flat and curved downward-facing surfaces for IFE applications". Thesis, Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180413/unrestricted/shellabarger%5fbrian%5ft%5f200312%5fms.pdf.
Pełny tekst źródłaAuer, Cornelia [Verfasser]. "Visualization of fundamental structures in two dimensional second order tensor fields on planar and curved surfaces / Cornelia Auer". Berlin : Freie Universität Berlin, 2014. http://d-nb.info/1053326599/34.
Pełny tekst źródłaChambers, James P. "Scale model experiments on the diffraction and scattering of sound by geometrical step discontinuities and curved rough surfaces". Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/17858.
Pełny tekst źródłaMashina, Giamal A. M. "Prediction of the Solar Performance of Curved Surfaces with Different Cross-Sectional Forms, Using a New Computer Program". Thesis, University of Nottingham, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.523597.
Pełny tekst źródłaAbolghasemibizaki, Mehran. "Liquid Interaction with Non-wettable Surfaces Structured with Macroscopic Ridges". VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5381.
Pełny tekst źródłaDobbertean, Mark Michael. "Steady and Transient Heat Transfer for Jet Impingement on Patterned Surfaces". Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3076.
Pełny tekst źródłaStreubel, Robert [Verfasser], Oliver G. [Akademischer Betreuer] Schmidt, Oliver G. [Gutachter] Schmidt, Denys [Akademischer Betreuer] Makarov i Peter [Gutachter] Fischer. "Imaging Spin Textures on Curved Magnetic Surfaces / Robert Streubel ; Gutachter: Oliver G. Schmidt, Peter Fischer ; Oliver G. Schmidt, Denys Makarov". Chemnitz : Universitätsbibliothek Chemnitz, 2015. http://d-nb.info/1213813646/34.
Pełny tekst źródłaGenevaux, Chloé. "Structures modulaires de bandes pliées". Thesis, Paris Est, 2013. http://www.theses.fr/2013PEST1152.
Pełny tekst źródłaFolded structures are attractive to architects and engineers for their structural qualities as well as spatial and plastic qualities. Taking as a starting point a linear folded stripe, this research does not address the design of pleated surfaces but that of reticular structures. The design of structures with "holes" from folded stripes is an original angle of approach. From a conceptual point of view, the continuity caused by folds transforms the usual conception by separated nodes and bars of reticular structures. The use of continuous linear stripes is one possible approach to make more efficient the design of complex shapes by minimizing the produced offcuts. This research investigates new methods of designing curved shapes. The aims of this research are:- A classification of different possible approaches encountered when conceiving from folded stripes.- The study a modular folded elements which assembly allows the generation of various curved surfaces : the geometry of different configurations of folded stripes and the assemblies allowed will be described
Lyon, Eduardo. "Component based design and digital manufacturing: a design for manufacturing model for curved surfaces fabrication using three axes computer numerical controlled router". Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/36531.
Pełny tekst źródłaForslund, Ola. "Scattering and propagation of electromagnetic waves in planar and curved periodic structures - applications to plane wave filters, plane wave absorbers and impedance surfaces". Doctoral thesis, KTH, Alfvén Laboratory, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3825.
Pełny tekst źródłaThe subject of this thesis is scattering of electromagneticwaves from planar and curved periodic structures. The problemspresented are solved in the frequency domain.
Scattering from planar structures with two-dimensionalperiodic dependence of constitutive parameters is treated. Theconstitutive parameters are assumed to vary continuously orstepwise in a cross section of a periodically repeating cell.The variation along a longitudinal coordinate z is arbitrary. Ageneral skew lattice is assumed. In the numerical examples, lowloss and high loss dielectric materials are considered. Theproblem is solved by expanding the .elds and constitutiveparameters in quasi-periodic and periodic functionsrespectively, which are inserted into Maxwells equations.Through various inner products de.ned with respect to the cell,and elimination of the longitudinal vector components, a linearsystem of ordinary di.erential equations for the transversecomponents of the .elds is obtained. After introducing apropagator, which maps the .elds from one transverse plane toanother, the system is solved by backward integration.Conventional thin metallic FSS screens of patch or aperturetype are included by obtaining generalised transmission andre.ection matrices for these surfaces. The transmission andre.ection matrices are obtained by solving spectral domainintegral equations. Comparisons of the obtained results aremade with experimental results (in one particular case), andwith results obtained using a computer code based on afundamentally di.erent time domain approach.
Scattering from thin singly curved structures consisting ofdielectric materials periodic in one dimension is alsoconsidered. Both the thickness and the period are assumed to besmall. The .elds are expanded in an asymptotic power series inthe thickness of the structure, and a scaled wave equation issolved. A propagator mapping the tangential .elds from one sideto the other of the structure is derived. An impedance boundarycondition for the structure coated on a perfect electricconductor is obtained.
Keywords:electromagnetic scattering, periodicstructure, frequency selective structure, frequency selectivesurface, grating, coupled wave analysis, electromagneticbandgap, photonic bandgap, asymptotic boundary condition,impedance boundary condition, spectral domain method,homogenisation
Gauss, Florian [Verfasser], Klaus [Akademischer Betreuer] Rückert, Klaus [Gutachter] Rückert i Chris [Gutachter] Williams. "The development of computing tools to approximate doubly curved surfaces with quadrilateral planar facets / Florian Gauss ; Gutachter: Klaus Rückert, Chris Williams ; Betreuer: Klaus Rückert". Berlin : Technische Universität Berlin, 2020. http://d-nb.info/1219962775/34.
Pełny tekst źródłaVelásquez, Flores Edgar José. "Graphic platform for curves and surfaces: análisis de curvas planas". Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2013. http://hdl.handle.net/10757/273608.
Pełny tekst źródłaTesis
Melle, Michael [Verfasser], Martin [Akademischer Betreuer] Schoen, Carol K. [Akademischer Betreuer] Hall i Sabine H. L. [Akademischer Betreuer] Klapp. "Anisotropic fluids and the manipulation of their ordering at curved surfaces / Michael Melle. Gutachter: Martin Schoen ; Sabine H. L. Klapp ; Carol K. Hall. Betreuer: Martin Schoen ; Carol K. Hall". Berlin : Technische Universität Berlin, 2014. http://d-nb.info/1066161313/34.
Pełny tekst źródłaPester, M. "Behandlung gekrümmter Oberflächen in einem 3D-FEM-Programm für Parallelrechner". Universitätsbibliothek Chemnitz, 1998. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-199801386.
Pełny tekst źródłade, Almeida Otterson James Joaquim. "Curves in algebraic surfaces". Thesis, Imperial College London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.525234.
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