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Dissertations / Theses on the topic 'Curva de Bézier'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Ueda, Edson Kenji. "Determinação da curva aproximadora pela composição de curvas de Bézier e aplicação do recozimento simulado." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-01022016-172642/.

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Determinar curvas a partir de uma série da pontos é uma tarefa importante e muito utilizada em CAD. Este trabalho propõe um algoritmo para determinar uma curva aproximadora representada por diversas curvas de Bézier em sequência a partir de uma sequência de pontos. É utilizada uma abordagem de curvas de Bézier por trechos, onde cada trecho possui continuidade C1-fraca. A otimização é feita pelo recozimento simulado com vizinhança adaptativa que minimiza a soma das distâncias de cada ponto da sequência à curva aproximadora e utiliza o comprimento da curva aproximadora como um fator de regulariz

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2

Almeida, Evert Elvis Batista de. "Curvas de Bézier." Universidade Federal da Paraíba, 2015. http://tede.biblioteca.ufpb.br:8080/handle/tede/8049.

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Submitted by Maike Costa (maiksebas@gmail.com) on 2016-03-29T12:30:28Z No. of bitstreams: 1 arquivototal.pdf: 6766956 bytes, checksum: 688f149f50bc50fabc326678e6942517 (MD5)<br>Made available in DSpace on 2016-03-29T12:30:28Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 6766956 bytes, checksum: 688f149f50bc50fabc326678e6942517 (MD5) Previous issue date: 2015-02-09<br>In this work we will make an introduction an important application mathematics called Bézier curves. The history of this curve originated in industry automobile French , and found many applications in various elds of sci

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3

North, Nicholas Stewart. "Intersection Algorithms Based On Geometric Intervals." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd2124.pdf.

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4

Ernhagen, Larsson Manfred, and Hampus Swensson. "Procedurell generering av grottsystem med hjälp av kubiska Bézier-splines." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20186.

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I denna uppsats presenteras ett verktyg för att assistera skapandet av spelbanor i dungeon-miljö. Skapandet av sådana banor är ofta resurskrävande under produktionen och har fokus på design. För att behålla designaspekten men underlätta arbetet är verktyget framtaget för att med tillgängliga parametrar producera grottgångar för sådana banor. Vi undersöker med användartester hur verktyget kan användas för att eﬀektivisera en känd metod för att skapa spelbanor, men samtidigt skapa den kvalité som eftertraktas. Med detta avser vi inte bara att ta fram ett eﬀektivt verktyg, utan även att demonstre

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5

Neagu, Manuela. "Courbes de Bézier en géométrie algorithmique : approximation et cohérence topologique." Phd thesis, Université Joseph Fourier (Grenoble), 1998. http://tel.archives-ouvertes.fr/tel-00004897.

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Dans cette thèse, nous proposons une méthode de résolution des problèmes de la géométrie algorithmique posés pour des objets courbes (par opposition aux objets "linéaires" : ensembles de points, segments, polygones ...). Les objets que nous étudions sont des courbes de Bézier composites, choisies, d'une part, pour le réalisme qu'elles assurent dans la modélisation géométrique, et d'autre part, pour la facilité du traitement algorithmique que leurs propriétés offrent. Notre approche met l'accent sur les aspects topologiques des problèmes abordés, en évitant les incohérences que la résolution en

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6

Gentile, Chiara. "Studio geometrico differenziale dell'evoluzione storica del simbolo dello Yin-Yang (Taijitu)." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7473/.

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Alla base dell'elaborato vi è uno studio geometrico differenziale del Taijitu ed in particolare della curva centrale presente nel simbolo; il tutto ripercorrendo cronologicamente ed in termini matematici il cambiamento che il simbolo ha subito nel corso del tempo. Tale studio è consistito, implementando un programma Matlab, nell'approssimazione mediante curve di Bézier, seguita da osservazioni sul grado delle curve trovate e sulla loro differenziabilità.

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7

Benetti, Andrea. "Modellazione Geometrica con MD-Spline." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/12369/.

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Le curve B-spline comunemente usate in modellazione geometrica sono costituite da segmenti polinomiali aventi tutti lo stesso grado. Nella pratica, è spesso necessario modellare curve composte da segmenti polinomiali di grado differente. In questi casi l’utilizzo delle curve B-spline classiche complica inutilmente la modellazione ed necessita di informazioni superflue alla descrizione matematica della curva. Le curve MD-Spline (Multi Degree Spline) sono una generalizzazione delle curve B-spline costituite da segmenti polinomiali di gradi differenti. Con le MD-Spline un progettista CAD ha

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8

Acevedo, Peñaloza Carlos Humberto. "Estudio del ángulo de presión y de la presión de contacto en mecanismos leva palpador cuya ley de desplazamiento se diseña por curvas de Bézier." Doctoral thesis, Universitat Politècnica de Catalunya, 2005. http://hdl.handle.net/10803/6408.

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La tesis ha centrado su estudio en los mecanismos de leva con palpador circular de traslación por ser éstos ampliamente utilizados en la industria actual. Para el diseño de la ley de desplazamiento se utiliza curvas de Bézier de continuidad 2 C , 3 C y 4 C con tramos rectos y se busca como objetivos de la tesis: aportar conocimiento y fundamento teórico al cálculo del ángulo de presión, radio de curvatura y distribución de la presión entre palpadores de rodillo y levas de modo que se facilite el estudio y la aplicación de dichos mecanismos.<br/>En la investigación se han abordado las tres etap

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9

Balistreri, Giuseppe. "Grafica Vettoriale e Rasterizzazione." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/17518/.

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In questa tesi ci occuperemo di esplorare il dietro le quinte della “Grafica Vettoriale” o delle così dette immagini vettoriali che tutti indistintamente usiamo, apprezziamo, ma di cui sappiamo molto poco. Si è scelto di approfondire lo studio di questo argomento perché è un settore della computer graphics che offre grandi potenzialità e verso cui anche grosse aziende di hardware grafico si stanno orientando. Nei capitoli che incontreremo, daremo la definizione di “Immagine Vettoriale”, vedremo le qualità che le rendono così importanti, daremo uno sguardo ai software esistenti che permettono d

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10

Batista, Guilherme Lopes. "Análise de acetona em ar exalado: desenvolvimento de método eletroanalítico e algoritmo para processamento de sinais." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-07042016-090549/.

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Propõe-se método novo e completo para análise de acetona em ar exalado envolvendo coleta com pré-concentração em água, derivatização química e determinação eletroquímica assistida por novo algoritmo de processamento de sinais. Na literatura recente a acetona expirada vem sendo avaliada como biomarcador para monitoramento não invasivo de quadros clínicos como diabetes e insuficiência cardíaca, daí a importância da proposta. Entre as aminas que reagem com acetona para formar iminas eletroativas, estudadas por polarografia em meados do século passado, a glicina apresentou melhor conjunto de carac

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11

Oropallo, William Edward Jr. "A Point Cloud Approach to Object Slicing for 3D Printing." Thesis, University of South Florida, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10751757.

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<p> Various industries have embraced 3D printing for manufacturing on-demand, custom printed parts. However, 3D printing requires intelligent data processing and algorithms to go from CAD model to machine instructions. One of the most crucial steps in the process is the slicing of the object. Most 3D printers build parts by accumulating material layers by layer. 3D printing software needs to calculate these layers for manufacturing by slicing a model and calculating the intersections. Finding exact solutions of intersections on the original model is mathematically complicated and computational

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12

He, Lijuan. "A global search algorithm for phase transition pathways in computer-aided nano-design." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50248.

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One of the most important design issues for phase change materials is to engineer the phase transition process. The challenge of accurately predicting a phase transition is estimating the true value of transition rate, which is determined by the saddle point with the minimum energy barrier between stable states on the potential energy surface (PES). In this thesis, a new algorithm for searching the minimum energy path (MEP) is presented. The new algorithm is able to locate both the saddle point and local minima simultaneously. Therefore no prior knowledge of the precise positions for the react

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13

Deddi, Hafsa. "Dualité géométrique et relations de correspondance entre courbes primales et duales." Phd thesis, Université Joseph Fourier (Grenoble), 1997. http://tel.archives-ouvertes.fr/tel-00004935.

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Cette thèse est une étude de base qui traite de la transformation de la dualité géométrique entre un point et un hyperplan d'un espace affine. Une étape indispensable est alors d'établir une définition rigoureuse de la dualité géométrique ainsi que ses propriétés et caractéristiques. Cette notion de dualité peut se généraliser pour toute forme géométrique décrite à l'aide d'une famille de points ou d'hyperplans. Ainsi une courbe duale d'une courbe paramétrique plane est définie comme enveloppe d'une famille de droites. Ces courbes duales sont ensuite analysées pour trouver des relations de cor

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14

Sacchi, Giulia. "La base di Bernstein in spazi polinomiali generalizzati." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7924/.

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Nella tesi si illustra il passaggio dagli spazi polinomiali agli spazi polinomiali generalizzati, gli spazi di Chebyshev estesi (spazi EC), e viene dato un metodo per costruirli a partire da opportuni sistemi di funzioni dette funzioni peso. Successivamente si tratta il problema dell'esistenza di un analogo della base di Bernstein negli spazi EC: si presenta, in analogia ad una particolare costruzione nel caso polinomiale, una dimostrazione costruttiva dell'esistenza di tale base. Infine viene studiato il problema delle lunghezze critiche di uno spazio EC: si tratta di determinare l'ampiezza d

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15

Jeřábek, Lukáš. "Aerodynamický návrh posledního stupně parní turbíny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378638.

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Diploma thesis deals with calculations of a steam turbine with two uncontrolled extraction points according to the assignment, aerodynamics of the last two stages and operating range with respect to ventilation, range of performance and straining of the last blading under the large condensation pressure deviations. For the first three stages the calculation of prismatic action blades is executed. The fourth and the fifth stages are designed with inconstant reaction over the blades length and their calculation is executed with constant circulation method. For these stages, aerofoil design with

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16

Appunni, Sandhya. "Design and Development of Geographical Information System (GIS) Map for Nuclear Waste Streams." FIU Digital Commons, 2014. http://digitalcommons.fiu.edu/etd/1667.

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A nuclear waste stream is the complete flow of waste material from origin to treatment facility to final disposal. The objective of this study was to design and develop a Geographic Information Systems (GIS) module using Google Application Programming Interface (API) for better visualization of nuclear waste streams that will identify and display various nuclear waste stream parameters. A proper display of parameters would enable managers at Department of Energy waste sites to visualize information for proper planning of waste transport. The study also developed an algorithm using quadratic Bé

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17

Škvarenina, Ľubomír. "Interpolace signálů pomocí NURBS křivek." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220618.

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Diploma thesis deals with image interpolation. The aim of this work is to study theoretically and then describe the nature of the various methods of image interpolation and some of them implemented in the program MATLAB. The introductory part of this work theoretically closer to important terms that are closely related to this topic of digital image processing sufficient to understand the principle. In the following of the thesis will be discussed all of today's commonly used method of image interpolation. Will hear all about the method of image interpolation using nearest neightbor interpolat

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18

Kramoliš, Ondřej. "Extrakce a modifikace vlastností číslicových zvukových signálů v dynamické rovině." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218782.

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This thesis deals with basic methods of root mean square and peak value measurement of a digital acoustic signal, algotithms to measure audio programme loudness and true-peak audio level according to recommendation ITU-R BS.1770-1 and digital systems for control of signal dynamic range. It shows achieved results of root mean square and peak value measurement and results of implementation of dynamic processor with general piecewise linear non-decreasing static curve and algorithms according to recommendation ITU-R BS.1770-1.

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19

Gdhami, Asma. "Méthodes isogéométriques pour les équations aux dérivées partielles hyperboliques." Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4210/document.

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L’Analyse isogéométrique (AIG) est une méthode innovante de résolution numérique des équations différentielles, proposée à l’origine par Thomas Hughes, Austin Cottrell et Yuri Bazilevs en 2005. Cette technique de discrétisation est une généralisation de l’analyse par éléments finis classiques (AEF), conçue pour intégrer la conception assistée par ordinateur (CAO), afin de combler l’écart entre la description géométrique et l’analyse des problèmes d’ingénierie. Ceci est réalisé en utilisant des B-splines ou des B-splines rationnelles non uniformes (NURBS), pour la description des géométries ain

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20

Dessarce, Rémi. "Calculs par lancer des rayons." Université Joseph Fourier (Grenoble), 1996. http://www.theses.fr/1996GRE10161.

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Les techniques de lancer de rayons ont été développées initialement dans le cadre du calcul d'images de synthèse. Par la suite, d'autres méthodes de rayons de type Monte-Carlo ont été utilisées pour la résolution de problèmes en optique et électromagnétisme. Nous présentons ici une méthode de calcul de la surface équivalente RADAR (S. E. R. ) d'un objet 3D à l'aide d'une méthode de lancer de rayon<br>L’emploi des méthodes asymptotiques nous permet d'obtenir une formulation moderne de l'optique géométrique qui constitue le fondement théorique de toutes les méthodes de rayons<br>La mise en œuvre

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21

Houšť, Vladimír. "Tenkostěnné přesypané konstrukce." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-234547.

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The thesis is devoted to analysing of flexible buried arch structures. Modelling of the flexible concrete arch is carried out via a nonlinear finite element model that accounts for soil constitutive relations, soil-structure interactions, sequential construction stages and soil compaction. Advanced FE-model was verified by measurement obtained by full-scale field testing of two buried arches. Mathematical optimization methods of genetic algorithms and Levenberg-Marquardt method are applied to already calibrated complex computational models in order to reduce bending and associated flexural str

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22

Jiříček, Milan. "Živý font." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219475.

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The work describes the theoretical foundations of modern methods of creating new fonts, that is, using information technology, specifically vector programs. It also marginally shows the history of the font, Roman writing, the basic division of its compositions and describes its individual elements. The next part of the project focuses on creating digital fonts and continues with bringing it to live using algorithms and methods that can easily be processed in Matlab programming language. The method of implementation of the bringing the typeface to live is described and presentation of the gener

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23

Bednár, Peter. "Tvorba písma OpenType volně dostupnými softwarovými prostředky." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218848.

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In thesis themes of typography and computer font of OpenType format is described in details. At the beginning attention is paid to historical development of typeface, where stress is laid mainly on development of Roman and white letter with their characteristics. Having presented basis of typography work is concentrated on topic of digital font with emphasis on possibilities of OpenType format. Further its characteristics and advantages were listed compared to another formats and it was evaluated as format appropriate also for creating font in education process. Letterspacing and kerning were

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24

Huang, Yu-Ching, and 黃玉菁. "Dynamic Bézier Curve for Design." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/5965zx.

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碩士<br>國立中正大學<br>應用數學研究所<br>102<br>In this paper, we focus on how to design the dynamic Bézier curves by the three strategies: approximating the y-coordinate direction, the tangent dynamic direction, and the tangent and normal direction. Then use the methods, and we set the target shapes complete by adjusting every Bézier curve with parameters.

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25

Kao, Tei Hui, and 高天暉. "Degree Reduction in Bézier Curve: A Blossoming Approach." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/66820966849795971835.

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碩士<br>大葉大學<br>工業工程與科技管理學系<br>94<br>The conversion of a B-spline curve in different domains of degree through the degree raising or degree reduction is common when transferring the B-spline from one computer system to another. This study explores further degree reduction in Bézier curve by use of with blossoming approach. I present a degree reduction algorithm to establish the control points of the reduced Bézier curve of degree from . This algorithm is easier to understand than the previous one and is simpler to program and can express the geometric relationship of control points before deg

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26

Carriazo, A., M. C. Marquez, and Hassan Ugail. "Normal Approximations of Regular Curves and Surfaces." 2015. http://hdl.handle.net/10454/8162.

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Yes<br>Bezier curves and surfaces are two very useful tools in Geometric Modeling, with many applications. In this paper, we will offer a new method to provide approximations of regular curves and surfaces by Bezier ones, with the corresponding examples.

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"Estudio del ángulo de presión y de la presión de contacto en mecanismos leva palpador cuya ley de desplazamiento se diseña por curvas de Bézier." Universitat Politècnica de Catalunya, 2005. http://www.tesisenxarxa.net/TDX-0725105-131338/.

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