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Dissertations / Theses on the topic 'Boolean operation'

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Published: 4 June 2021
Last updated: 25 July 2025

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1

Lai, Shuhua. "Subdivision Surface based One-Piece Representation." UKnowledge, 2006. http://uknowledge.uky.edu/gradschool_diss/330.

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Subdivision surfaces are capable of modeling and representing complex shapes of arbi-trary topology. However, methods on how to build the control mesh of a complex surfaceare not studied much. Currently, most meshes of complicated objects come from trian-gulation and simplification of raster scanned data points, like the Stanford 3D ScanningRepository. This approach is costly and leads to very dense meshes.Subdivision surface based one-piece representation means to represent the final objectin a design process with only one subdivision surface, no matter how complicated theobject's topology or
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2

Koshta, Prashant Kumar, and Shailendra Singh Thakur. "A Novel Authenticity of an Image Using Visual Cryptography." IJCSN, 2012. http://hdl.handle.net/10150/219514.

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Information security in the present era is becoming very important in communication and data storage. Data transferred from one party to another over an insecure channel (e.g., Internet) can be protected by cryptography. The encrypting technologies of traditional and modern cryptography are usually used to avoid the message from being disclosed. Public-key cryptography usually uses complex mathematical computations to scramble the message.<br>A digital signature is an important public-key primitive that performs the function of conventional handwritten signatures for entity authentic
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3

Rota, Pascal. "Boolean operations on point set surfaces." Zürich : ETH, Swiss Federal Institute of Technology Zurich, Department of Computer Science, Institute of Computational Science, 2008. http://e-collection.ethbib.ethz.ch/show?type=dipl&nr=363.

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4

LEAL, HELOISA REIS. "BOOLEAN OPERATIONS ON POINT-BASED MODELS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=5881@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>Operações booleanas em modelagem 3D são usadas para criar novos modelos ou para modificá-los. Na maioria dos tipos de representação de objetos 3D, estas operações são bastante complexas. Nos últimos anos tem sido muito explorado um novo tipo de modelagem, a modelagem por pontos, que apresenta muitas vantagens em relação às outras representações como maior simplicidade e eficiência. Dois trabalhos exploram as operações booleanas na modelagem por pontos, o trabalho de Adams e Dutré e o trabalho de Pauly et. al. Dada a grande importância deste
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5

Saeed, Saif Eldin Osman. "Boundary merging in Boolean and offsetting operations." Thesis, University of Leeds, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270161.

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6

ARRUDA, MARCOS CHATAIGNIER DE. "BOOLEAN OPERATIONS WITH COMPOUND SOLIDS REPRESENTED BY BOUNDARY." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=6688@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>TECNOLOGIA EM COMPUTAÇÃO GRÁFICA<br>Num modelador de sólidos, uma das ferramentas mais poderosas para a criação de objetos tridimensionais de qualquer nível de complexidade geométrica é a aplicação das operações booleanas. Elas são formas intuitivas e populares de combinar sólidos, baseadas nas operações aplicadas a conjuntos. Os tipos principais de operações booleanas comumente aplicadas a sólidos são: união, interseção e diferença. Havendo interesse prático, para garantir que os objetos resultantes possuam a mesma dimensão
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7

Sheng, James Min. "Efficient geographic information systems : data structures, Boolean operations and concurrency control /." Online version of thesis, 1990. http://hdl.handle.net/1850/10594.

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8

Stab, Olivier. "Maillage automatique tridimensionnel par operations booleennes." Paris, ENMP, 1992. http://www.theses.fr/1992ENMP0377.

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Le domaine d'etude est l'algorithmique geometrique applique aux problemes du maillage automatique de geometries tridimensionnelles complexes. L'utilisation de la methode des elements finis pour simuler numeriquement le comportement de phenomenes physiques reste delicate ou fastidieuse a cause de l'etape du maillage qui pose de nombreux problemes en trois dimensions. Dans cette these on propose une nouvelle approche: le maillage par operations booleennes. Elle consiste a calculer un maillage comme une union, une difference ou une intersection entre deux domaines mailles. Deux methodes sont decr
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9

Fratzeskou, Eugenia. "Visualising Boolean set operations : real and virtual boundaries in contemporary site-specific art." Thesis, University of Surrey, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425040.

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10

Gaffney, Christopher T. "The application of the inclusion-exclusion principle in learning monotone boolean functions." abstract and full text PDF (free order & download UNR users only), 2008. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1453632.

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11

Yildirim, Hamdi Murat. "Algebraic Properties Of The Operations Used In Block Cipher Idea." Phd thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12608289/index.pdf.

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In this thesis we obtain several interesting algebraic properties of the operations used in the block cipher IDEA which are important for cryptographic analyzes. We view each of these operations as a function from $mathbb Z_{2}^n times mathbb Z_{2}^n to mathbb Z_{2}^n$. By fixing one of variables $v(z)=mathbf Z$ in $mathbb Z_{2}^n times mathbb Z_{2}^n$, we define functions $mathbf {f}_z$ and $mathbf {g}_z$ from $mathbb Z_{2}^n$ to $mathbb Z_{2}^n$ for the addition $BIGboxplus$ and the multiplication $BIGodot$ operations, respectively. We first show that the nonlinearity of $mathbf {g}_z$ rema
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12

Čižmarik, Roman. "Boolovské operace s polygonálními modely." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2018. http://www.nusl.cz/ntk/nusl-385953.

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The aim of this work is to create a library for Boolean operations on 3D polygonal meshes. Resulting library has to support open models, its memory requirements shouldn't exceed those of existing solutions and it should, ideally, support multiple models. Most of the existing solutions are vulnerable to arithmetic inaccuracies, or do not support open meshes. The solution is based on Adaptive Mesh Booleans method which treats input models as adaptive surfaces. This method assumes that input models can be arbitrarily refined and no individual polygon is particularly important. Instead of computin
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13

VELAYUTHAM, PRAKASH SANKAREN. "AN EFFICIENT ALGORITHM FOR CONVERTING POLYHEDRAL OBJECTS WITH WINGED-EDGE DATA STRUCTURE TO OCTREE DATA STRUCTURE." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1109366602.

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14

Daněk, Tomáš. "Analýza algoritmů booleovských operací nad obecnými polygony." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235449.

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This thesis deals with general polygon boolean operation algorithms. Boolean operations are e.g. intersection, union or difference. A general polygon can be e.g. a selfinterecting polygon with inner hole. Clipping of polygons against a rectangular window is probably the most familiar boolean operation on polygons. At first, basic definitions are listed. Then the principles of a selected set of boolean operation algorithms are reviewed. Finally, a complex comparison of the algorithms is undertaken. Performance as well as the ability to handle degenerate cases are tested. The output of this thes
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15

Oliver, Gelabert Antoni. "Desarrollo y aceleración hardware de metodologías de descripción y comparación de compuestos orgánicos." Doctoral thesis, Universitat de les Illes Balears, 2018. http://hdl.handle.net/10803/462902.

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Introducción El acelerado ritmo al que se genera y crece la información en la sociedad actual y la posible llegada de la tecnología de transistor a sus límites de tamaño exige la puesta en marcha de soluciones para el procesado eficiente de datos en campos específicos de aplicación. Contenido Esta tesis doctoral de carácter transdisciplinar a medio camino entre la ingeniería electrónica y la química computacional presenta soluciones optimizadas en hardware y en software para la construcción y el procesado eficiente de bases de datos moleculares. En primer lugar se propone y se estudia el
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16

Cai, Song-Ruei, and 蔡松叡. "Revisiting Boolean-Operation Based Visual Cryptography." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/44869015760739050102.

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碩士<br>國立東華大學<br>資訊工程學系<br>103<br>Visual Cryptography Scheme (VCS) is provided with two important characteristics. One is based on pixel-wise operation, and the other is is decoding without computer (i.e., the stacking-to-see property). Generally, the so-called Boolean-operation based image processing schemes, e.g., ata hiding, digital watermarking, image sharing, encryption, adopt bit-wise operations. Even though the logic operation is very simple, it still needs a computer and an image editing program to deal with. For example a bit-wise OR operation of a pixel, the pixel need to be subdivide
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17

Tseng, Tai-Yuan, and 曾泰原. "Editable Boolean Operation on Non-manifold Geometric Models." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/38120643292250475637.

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碩士<br>國立臺灣大學<br>機械工程學系<br>85<br>Fast Boolean operation provides a good environment for editing the old designs. The efficiency of Boolean operation can be improved by reevaluating only the affected portions of the bodies instead of the whole bodies. In this thesis, the Topology Manager is proposed for fast reevaluation of CSG editing operations. The Boolean trees are embedded to the Boolean operations of the non-manifold geometric system in order to record the history of d
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18

Sun, Chun-Pin, and 孫俊斌. "Parallel Boolean Operations in Solid Modeling." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/93558358196645999107.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>96<br>During the construction process of solid modeling, complex models are usually built up from basic geometric entities (points, curves, surfaces) and then use several primitive solids to execute a series of Boolean operations. However, the more plenty and complex of the cumulation of data, the more amount of time is required in Boolean operation. In consideration of editing and modifying after the model construction, it is difficult to improve the calculation efficiency by optimizing the existing sequential algorithms. The concept of parallel operation seems
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19

Lee, Ta-Shun, and 李大順. "Distributed Boolean Operations in Solid Modeling." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/50230726049333235941.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>101<br>To meet the diverse needs of product design and get the perfect prototypes on Computer Aided Design, complex solid models need to be constructed and cost more computing time. Usually it takes advanced equipments to process a large number of sequential Boolean operations. Therefore, on the premise of a perfect prototype, the focus of this paper is concentrated on how to improve the process flow and shorten the computing time for a large number of Boolean operations under the limitation of the hardware resource and the main use of Euler operator in Boolean oper
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20

Yen, Yu-Chieh, and 顏昱杰. "Boolean Operations and Partial Modification of Solid Modeling." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/54191512119893205819.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>100<br>Boolean operations are used widely in Solid Model System. However, as Boolean operation is used more frequently, the model’s data will be much more complex and the calculating time will be increased. Therefore, modify the Boolean algorithm becomes very important, This paper presents a new Boolean algorithm to solve the difficulties of the traditional one, meanwhile, preserving the way to edit or modify the model after Boolean operations. Intuitive modeling has been more and more popular recently. It can modify the shape of model rapidly; moreover, it doesn’t
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21

Chao, Kun-Yuan, and 趙崑源. "A Study of Image Sharing Using Boolean and Modulus Operations." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/15998169535560540080.

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博士<br>國立交通大學<br>資訊科學與工程研究所<br>98<br>In this dissertation, we propose three techniques in image sharing by using Boolean operations and modulus operations. Image sharing is a popular technology to secure digital images in storage and transmission. Traditionally, the technology transforms one secret image to several images called shadows or shares. Later, when the number of collected shadows reaches a specified threshold value, then the decomposed image can be reconstructed. In image sharing, polynomial interpolation approach has heavy computational load to retrieve the shared image. To the cont
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22

Chen, Yu Lun. "Parallel and heuristic approaches for computing boolean operations in a geometric modeling engine." 1995. http://catalog.hathitrust.org/api/volumes/oclc/33093629.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1995.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 95-101).
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23

Jiang, Bing-Hui, and 江炳輝. "Extending ML-OARSMT to Net Open Locator with Efficient and Effective Boolean Operations." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/rhdfyn.

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碩士<br>國立交通大學<br>電子研究所<br>107<br>Multi-layer obstacle-avoiding rectilinear Steiner minimal tree (ML-OARSMT) problem has been extensively studied in recent years. In this work, we consider a variant of ML- OARSMT problem and extend the applicability to the net open location finder. Since ECO or router limitations may cause the open nets, we come up with a framework to detect and reconnect existing nets to resolve the net opens. Different from prior connection graph based approach, we propose a technique by applying efficient Boolean operations to repair net opens. Our method has good quality and
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24

Yeh, Ming Chin, and 葉明欽. "A Feature Extraction Method Based on Boolean Operations in Computer Aided Process Planning Systems." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/56604748728393189741.

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碩士<br>國立中興大學<br>資訊科學學系<br>84<br>When the design of a part have been finished, the next problem is: how to produce that part? This problem is usually not answered in the designstage by the designer. It is the responsibility of the process planner,who has a comprehension with the manufacturing system, to establish processes and parameters for converting a raw material to the designedpart. The task that a process planner does is called process planning, which requires a significant amount of
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25

Lozina, Irina I. "Composite boolean separators for data analysis with applications in computed tomography and gene expression microarray data." 2007. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.13481.

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26

ARRIGONI, VIVIANA. "Network performance analysis through Boolean Network Tomography and parallelization of fundamental operations in numerical linear algebra." Doctoral thesis, 2021. http://hdl.handle.net/11573/1561802.

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This thesis collects, in a unified framework, two cores, reflecting the dual nature of my research activity. During my Ph.D., I had the chance to explore different branches of knowledge in Computer Science, and this thesis focuses on the two disciplines where my work was more fertile, that are respectively Boolean Network Tomography and Numerical Linear Algebra and High Performance Computing. Despite these two branches are orthogonal to one another in the fields of application of this thesis, they share a common ground as numerical Linear Algebra is often evoked for solving problems in Optimiz
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27

Hachenberger, Peter [Verfasser]. "Boolean operations on 3D selective Nef complexes : data structure, algorithms, optimized implementation, experiments and applications / von Peter Hachenberger." 2007. http://d-nb.info/986475793/34.

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28

Leblanc, Luc. "Modélisation procédurale par composants." Thèse, 2011. http://hdl.handle.net/1866/6159.

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Le réalisme des images en infographie exige de créer des objets (ou des scènes) de plus en plus complexes, ce qui entraîne des coûts considérables. La modélisation procédurale peut aider à automatiser le processus de création, à simplifier le processus de modification ou à générer de multiples variantes d'une instance d'objet. Cependant même si plusieurs méthodes procédurales existent, aucune méthode unique permet de créer tous les types d'objets complexes, dont en particulier un édifice complet. Les travaux réalisés dans le cadre de cette thèse proposent deux solutions au problème de la modé
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29

BRUNI, Renato. "Essays on Logic Programming." Doctoral thesis, 2001. http://hdl.handle.net/11573/497522.

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30

Václavík, Jiří. "CSG modelování pro polygonální objekty." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-313848.

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This work deals with an efficient and robust technique of performing Boolean operations on polygonal models. Full robustness is achieved within an internal representation based on planes and BSP (binary space partitioning) trees, in which operations can be carried out exactly in mere fixed precision arithmetic. Necessary conversions from the usual representation to the inner one and back, including their consequences are analyzed in detail. The performance of the method is optimized by a localization scheme in the form of an adaptive octree. The resulting implementation RazeCSG is experimental
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