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Dissertations / Theses on the topic 'Fractal shapes'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Neil, Geoffrey. "Shape recognition using fractal geometry." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319951.

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2

Almutairi, Khaled S. M. KH. "Employing the Concept of Fractal Shape to Enhance Heat Transfer." Cleveland State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=csu1513093485786172.

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3

USUI, Shin'ichi, Masayuki TANIMOTO, Toshiaki FUJII, Tadahiko KIMOTO, and Hiroshi OHYAMA. "Fractal Image Coding Based on Classified Range Regions." Institute of Electronics, Information and Communication Engineers, 1998. http://hdl.handle.net/2237/14996.

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4

Heinson, William Raymond. "Simulation studies on shape and growth kinetics for fractal aggregates in aerosol and colloidal systems." Diss., Kansas State University, 2015. http://hdl.handle.net/2097/19714.

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Doctor of Philosophy<br>Physics<br>Amitabha Chakrabarti<br>The aim of this work is to explore, using computational techniques that simulate the motion and subsequent aggregation of particles in aerosol and colloidal systems, many common but not well studied systems that form fractal clusters. Primarily the focus is on cluster shape and growth kinetics. The structure of clusters made under diffusion limited cluster-cluster aggregation (DLCA) is looked at. More specifically, the shape anisotropy is found to have an inverse relationship on the scaling prefactor "k"_"0" and have no effect on the f

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5

Backes, Andre Ricardo. "Implementação e comparação de métodos de estimativa da dimensão fractal e sua aplicação à análise e processamento de imagens." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-06092006-152806/.

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A Dimensão Fractal pode ser utilizada para medir algumas características ligadas a complexidade da imagem, permitindo seu uso em análise de formas e texturas e reconhecimento de padrões. Neste trabalho é apresentado um estudo comparativo entre alguns dos principais métodos de estimativa da Dimensão Fractal. Foi realizada uma análise experimental e um estudo de casos para cada uma das técnicas, levando em consideração aspectos de implementação, precisão, variação de resultados segundo ajuste de parâmetros e tolerância a ruídos. Neste trabalho também foi desenvolvido um estudo sobre a Dimensão F

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6

Lottin, Delphine. "Dimensions fractales, morphologie et caractéristiques dimensionnelles 2D et 3D d'agrégats de nanoparticules de suie aéronautique : Etude par microscopie électronique en transmission et tomographie électronique." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4012/document.

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Les agrégats de suie émis par les processus de combustion dans les turbines aéronautiques contribuent à modifier le bilan radiatif de l'atmosphère et la qualité de l'air. La connaissance de leurs caractéristiques physiques et chimiques est indispensable pour évaluer leur rôle dans les processus physico-chimiques atmosphériques et leur impact sur l'environnement et la santé publique. Dans ce contexte, notre étude vise à déterminer la taille et la morphologie d'agrégats de suie aéronautique à partir de mesures expérimentales menées en microscopie électronique en transmission (MET) et en tomograp

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7

Frisch, Adam Arthur. "Development, test and application of a new method of particle shape analyses based on the concept of the fractal dimension." W&M ScholarWorks, 1988. https://scholarworks.wm.edu/etd/1539616650.

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Shape analysis methods based on the concept of the fractal dimension are emerging as a new method of quantifying complex particle shapes. The concept of the fractal dimension stems from the approximately linear relationship between the logarithm of the particle perimeter and the logarithm of the step length or unit of measure. as step length is shortened, the resulting particle perimeter is lengthened. The fractal dimension (D) is defined as 1 {dollar}-{dollar} b, where b is the slope of the log/log plot of perimeter against step length. Using two dimensional projected particle outlines measur

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8

Kharbachi, Chams. "Etude de la croissance électrochimique de dépôts ramifiés." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30244.

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L'étude porte sur la croissance de branches métalliques ramifiées par électrolyse en mode galvanostatique, d'une solution aqueuse de sel métallique, stagnante, à l'intérieur d'une cellule de type Hele-Shaw. En l'absence d'électrolyte support, la contrainte d'électroneutralité pousse le dépôt à croitre, par des événements de nucléation/croissance successifs, sous forme de branches ramifiées constituées de nanocristaux. Le principal objectif consiste à comprendre et à élucider les mécanismes de formation des branches ramifiées électrocristallisées, ainsi que leur morphologie à l'échelle macrosco

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9

Neiva, Hugo Miguel Soares de Azevedo. "La Pedrera, Madrid." Master's thesis, Universidade de Lisboa, Faculdade de Arquitetura, 2019. http://hdl.handle.net/10400.5/18424.

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Dissertação de Mestrado Integrado em Arquitetura, com a especialização em Arquitetura apresentada na Faculdade de Arquitetura da Universidade de Lisboa para obtenção do grau de Mestre.<br>Madrid, tal como outras grandes cidades, não foi pensada e gerada como um todo. Pelo contrário, ela resulta de um conjunto de diferentes contextos e tecidos urbanos, a partir dos quais, se originam espaços de transição entre eles, e que, frequentemente, se reflectem em espaços fragmentados, com piores acessibilidades e descaracterizados, portanto, incapazes de gerar espaço urbano de qualidade e referência

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10

Backes, André Ricardo. "Estudos de métodos de análise de complexidade em imagens." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-02062010-112607/.

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A complexidade é uma característica de grande importância em processos de reconhecimento de padrões, especialmente naqueles que envolvem imagens biológicas. Este trabalho tem como objetivo estudar métodos que realizam a análise de imagens por meio da análise de sua complexidade. Os métodos a serem estudados foram selecionados com base na similaridade de seus algoritmos e metodologia: dimensão fractal, Caminhada Determinística do Turista e Redes Complexas. Estes métodos permitem realizar a análise e segmentação de formas ou texturas contidas em uma imagem com base na sua variação de complexidad

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11

Humphries, Nicolas Edmund. "Behavioural analysis of marine predator movements in relation to heterogeneous environments." Thesis, University of Plymouth, 2013. http://hdl.handle.net/10026.1/1571.

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An understanding of the spatio-temporal dynamics of marine predator populations is essential for the sustainable management of marine resources. Tagging studies are providing ever more information about the movements and migrations of marine predators and much has been learned about where these predators spend their time. However little is known about their underlying motivations, making it difficult to make predictions about how apex predators will respond to changing environments. While much progress has been made in behavioural ecology through the use of optimality models, in the marine env

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12

Tolppanen, Pasi. "3-D Characterization and Degradation Analysis of Rock aggregates." Doctoral thesis, Stockholm : Tekniska högsk, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3225.

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13

Leandro, Jorge de Jesus Gomes. "Dois problemas em análise de formas de estruturas de ramificação." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/45/45134/tde-02092008-113204/.

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O presente texto descreve métodos e apresenta resultados do projeto de pesquisa de mestrado intitulado \"Dois Problemas em Análise de Formas de Estruturas de Ramificação\". Ambos os problemas abordados estão relacionados às sub-áreas da Análise de Formas denominadas Caracterização e Descrição de Formas. O primeiro problema consiste na investigação de um conjunto de características propostas para distingüir, primeiramente, entre estruturas de ramificação de vasos sangüíneos em imagens de retina segmentadas manualmente e automaticamente. A seguir, as mesmas características são aplicadas para dis

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14

Chams, Dima. "La création artistico-scientifique de l’ornement géométrique aujourd’hui." Thesis, Pau, 2020. http://www.theses.fr/2020PAUU1088.

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L’ornement est considéré comme excédentaire à un objet existant et n’a pas de rôle essentiel dans la création artistique. À partir de cette hypothèse, cette recherche se propose de démontrer le contraire de ce consensus. En effet, l’objectif de cette thèse n’est pas de changer la définition de l’ornement, mais de l’orienter vers une autre vision et une nouvelle approche. Comment allons-nous procéder pour prouver ce nouveau point de vue ?Biologiquement, c’est en démontrant comment l’artiste, notamment l’artiste-chercheur, crée et comment son cerveau et ses sens réagissent à la création. Tout en

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15

Carvalho, Juliano Daloia de. "Métodos para aproximação poligonal e o desenvolvimento de extratores de características de forma a partir da função tangencial." Universidade Federal de Uberlândia, 2008. https://repositorio.ufu.br/handle/123456789/12463.

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Whereas manually drawn contours could contain artifacts related to hand tremor, automatically detected contours could contain noise and inaccuracies due to limitations or errors in the procedures for the detection and segmentation of the related regions. To improve the further step of description, modeling procedures are desired to eliminate the artifacts in a given contour, while preserving the important and significant details present in the contour. In this work, are presented a couple of polygonal modeling methods, first a method applied direct on the original contour and other derived fro

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16

Zachariáš, Michal. "Návrh a Aplikace Dvourozměrných Vizuálních Markerů pro Speciální Účely." Doctoral thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2016. http://www.nusl.cz/ntk/nusl-412574.

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Současné vizuální markerové systémy mají jednu zásadní nevýhodu oproti tzv. markerless přístupům - pohyb kamery je omezen na oblast pokrytou markery. V každém snímku musí být marker dostatečně velký, aby jej bylo možné identifikovat a vypočítat pozici a rotaci kamery. Zároveň musí být dostatečně malý, aby se celý (nebo alespoň jeho podstatná část) vešel do záběru kamery. Avšak tyto požadavky jsou protichůdné. Tato práce nabízí řešení tohoto problému za pomoci konceptu Marker Fields. Jde o strukturu, jejíž přítomnost je možné v obraze kamery snadno detekovat a identifikovat část, na kterou se k

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17

LI, JUN-MING, and 李俊明. "The planes-fractal model for parametric design of cloud shapes." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/39480305621918939029.

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18

MAO, KUN-CAN, and 麥焜燦. "The profile-fractal model for parametric design of mountain shapes." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/60734760053190427047.

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19

Agrawal, Sonu. "Design and Analysis of Hexagonal Shaped Fractal Antennas." Thesis, 2013. http://ethesis.nitrkl.ac.in/4796/1/211EC4113.pdf.

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In this report three antenna designs using fractals have been proposed. Fractal is a concept which is being implemented in microstrip antenna to have better characteristics than conventional microstrip antenna. In the first design, a hexagonal shaped monopole fractal antenna for wideband application is designed. The proposed fractal-like geometry is implemented on a microstrip fed planar hexagonal monopole antenna. The iterated hexagonal fractal patch and modified ground plane are employed to achieve the desired wideband characteristics. A notch is also achieved by introducing slits in ground

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20

Chou, Shu-Yuan, and 周淑媛. "A Creation of Computing Design for Interactive Fractal Dynamic Shape." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/05727040787048507246.

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碩士<br>中原大學<br>商業設計研究所<br>94<br>Fractal theory is a new developing science at the recent 30 years. Because appearance of computer let us experience the beauty of fractal in early time. It brings us another kind of vision pleasantly surprised, different from symmetry, rule, and stiff feeling of Euclid geometry. The fractal is developed on complex variable space. It is self-similar, can extend by oneself limitlessly, and has the property of Fractal dimension lets the shape of fractal have the sense difficult to fathom. As fractal meets computing designs that excites out the peculiar aesthetic vie

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21

Vinoy, K. J. "Fractal shaped antenna elements for wide and multi-band wireless applications." 2002. http://www.etda.libraries.psu.edu/theses/approved/PSUonlyIndex/ETD-190/index.html.

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22

Chang, Chih-hsiung, and 張智雄. "A Study on the Thermo-Fluidic Behavior of the Flow in a H-Shaped Fractal-Like Branching." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/53274151893947574136.

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碩士<br>中原大學<br>機械工程研究所<br>96<br>This study investigated the behavior of the flow for single-phase in laminar flowing though fractal microchannel using the analysis tool-CFDRC. The fractal microchannel is M=2, 3, 4 and 5 respectively. In order to compared the pressure drop for fractal and parallel straight microchnnel. The Reynolds number was used in this study were in the range between 174.9 and 1749.1.Deionized water was used as the working fluid. In the temperature field, this study was to analysis the M=2,3 and 4 of the fractal microchannl for the aluminum. This result obtained the relations

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