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Relevant bibliographies by topics / NURB

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Academic literature on the topic 'NURB'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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Journal articles on the topic "NURB"

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Ensari, Elif, and Mine Özkar. "Shape computations with NURB curves." Artificial Intelligence for Engineering Design, Analysis and Manufacturing 32, no. 3 (May 28, 2018): 282–94. http://dx.doi.org/10.1017/s0890060417000592.

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AbstractFreeform curves are commonly used in contemporary design practices, especially with digital modeling tools. We investigate facilitating shape subtraction and addition with two-dimensional (planar) non-uniform rational basis-spline (NURB) curves with the codes and conventions of modeling while preserving the visual continuity of curved shapes. Our proposed tool, developed in a common digital modeling environment, automates the adjustment of parameters for tangential continuity of curves in shape rule applications. When the user designates a curve range to subtract from an initial shape and provides a new curved shape to add to it, the tool splits the initial shape, scales and aligns the curve to be added to fit into this range, introduces additional control points at the joining ends of the new curve to preserve continuity and redraws the new curve. We present a sample set of design variations produced using this practical approach which can be utilized as a method or become part of an automated NURB curve manipulation tool for designers.

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Luken, William L. "Tessellation of trimmed NURB surfaces." Computer Aided Geometric Design 13, no. 2 (March 1996): 163–77. http://dx.doi.org/10.1016/0167-8396(95)00019-4.

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Willis, Philip, and Robert Oddy. "Rendering NURB Regions For 2D Animation." Computer Graphics Forum 11, no. 3 (May 1992): 35–44. http://dx.doi.org/10.1111/1467-8659.1130035.

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Choi, B. K., W. S. Yoo, and C. S. Lee. "Matrix representation for NURB curves and surfaces." Computer-Aided Design 22, no. 4 (May 1990): 235–40. http://dx.doi.org/10.1016/0010-4485(90)90052-e.

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Kim, Eung-Sik, Byeong-Yoon Lee, and Jong-Keun Park. "Electric Field Optimization Using NURB Curve and Surface." IEEJ Transactions on Power and Energy 113, no. 10 (1993): 1081–87. http://dx.doi.org/10.1541/ieejpes1990.113.10_1081.

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Razdan, Anshuman, and Gerald Farin. "Determination of end conditions for NURB surface interpolation." Computer Aided Geometric Design 15, no. 7 (July 1998): 757–68. http://dx.doi.org/10.1016/s0167-8396(97)00025-3.

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O'Keefe, John, Payam Ashtiani, and David Grant. "A New Software Tool to Facilitate NURB Based Geometries in Acoustic Design." Building Acoustics 21, no. 1 (March 2014): 97–104. http://dx.doi.org/10.1260/1351-010x.21.1.97.

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Luken, William L., and Fuhua Cheng. "Comparison of surface and derivative evaluation methods for the rendering of NURB surfaces." ACM Transactions on Graphics 15, no. 2 (April 1996): 153–78. http://dx.doi.org/10.1145/234972.234977.

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Li, Mo, Vladimir E. Belozerov, and Haini N. Cai. "Modulation of Chromatin Boundary Activities by Nucleosome-Remodeling Activities in Drosophila melanogaster." Molecular and Cellular Biology 30, no. 4 (December 7, 2009): 1067–76. http://dx.doi.org/10.1128/mcb.00183-09.

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ABSTRACT Chromatin boundaries facilitate independent gene regulation by insulating genes from the effects of enhancers or organized chromatin. However, the mechanisms of boundary action are not well understood. To investigate whether boundary function depends on a higher order of chromatin organization, we examined the function of several Drosophila melanogaster insulators in cells with reduced chromatin-remodeling activities. We found that knockdown of NURF301 and ISWI, key components of the nucleosome-remodeling factor (NURF), synergistically disrupted the enhancer-blocking function of Fab7 and SF1 and augmented the function of Fab8. Mutations in Nurf301/Ebx and Iswi also affected the function of these boundaries in vivo. We further show that ISWI was localized on the endogenous Fab7 and Fab8 insulators and that NURF knockdown resulted in a marked increase in the nucleosome occupancy at these insulator sites. In contrast to the effect of NURF knockdown, reduction in dMi-2, the ATPase component of the Drosophila nucleosome-remodeling and deacetylation (NuRD) complex, augmented Fab7 and suppressed Fab8. Our results provide the first evidence that higher-order chromatin organization influences the enhancer-blocking activity of chromatin boundaries. In particular, the NURF and NuRD nucleosome-remodeling complexes may regulate Hox expression by modulating the function of boundaries in these complexes. The unique responses by different classes of boundaries to changes in the chromatin environment may be indicative of their distinct mechanisms of action, which may influence their placement in the genome and selection during evolution.

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Mazure, Marie-Laurence. "NURBS or not NURBS?" Comptes Rendus Mathematique 354, no. 7 (July 2016): 747–50. http://dx.doi.org/10.1016/j.crma.2016.01.027.

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Dissertations / Theses on the topic "NURB"

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Naseath, George Benjamin. "Reducing Curvature in Complex Tool Paths by Deviating from CAM-Produced Tool Paths Within a Tolerance Band." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd2245.pdf.

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Björk, Amanda. "numb grounds gas." Thesis, Konstfack, Institutionen för Konst (K), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-7777.

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The alchemical term solve et coagula describes the two stages of the refinement process that materials go through to transform into another form. This work is a result of an idea of how dissolution and coagulation can occur in painting and how it manifests physically. Each physical object, break it apart to its core and elements, and you will find it in the land. As a thought, a dream, or a memory, it is part of the landscape of your mind. And like a word that exists in our social landscape.

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Masiulionytė, Vaida. "NURBS paviršiai mobiliuosiuose įrenginiuose." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2006~D_20140702_195113-10074.

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Darbe yra apžvelgiamos NURBS paviršių atvaizdavimo realizavimo problemos mobiliesiems įrenginiams. Pagrindinis darbo tikslas yra įsitikinti tokios realizacijos galimumu, bei surasti kiek įmanoma efektyvesnį būdą, išsprendžiantį mobiliųjų platformų realizacijų problemas. Dar vienas tikslas, sukurti prototipinį sprendimą, padengiantį NURBS standartą. Analizei pasirinkta M3G mobiliosios grafikos standartas, kuris šiuo metu yra labiausiai paplitęs. Realizacijų palyginimui buvo pasirinkti du algoritmai: Oslo ir tiesioginis. Atlikus veikimo analizę nustatyta, jog tiesioginis algoritmas yra efektyvesnis, kurio pagrindu buvo išbaigtas NURBS standartas, realizuojant Trimmed NURBS modelius.
In the thesis it is analyzed the problems related with NURBS rendering implementation for mobile devices. The main goal of the thesis is to make find out if such implementation is possible at all and to find most effective way to implement it. One more goal is to create a prototype implementation for NURBS standard including Trimmed NURBS. M3G mobile graphics platform was chosen for analysis, which is mostly adopted across the vendors nowadays. There was chosen two rendering algorithms for analysis purposes: Oslo and directional. During analysis it was discovered, that Directional algorithm is more effective than Oslo, and it was adapted to prototype solution – Trimmed NURBS.

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Cashman, Thomas Joseph. "NURBS-compatible subdivision surfaces." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608572.

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Prahasto, Toni. "Simultaneous multicurve approximation with NURBS." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0026/NQ38292.pdf.

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Shehabeldin, Heba. "Radiostereometry Using NURBS Implant Models." Thesis, Umeå universitet, Institutionen för datavetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-152565.

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Radiostereometric analysis (RSA) is a method used for determining migration and wear of orthopaedic implants through measurements performed in radiographs. There are two approaches of RSA: marker-based and model-based (MBRSA). Marker-based RSA is the conventional and most accurate method. However, it requires markers to be inserted or attached to the implants. MBRSA avoids using markers by employing 3D geometric models of the implants. State-of-the-art methods for model-based RSA use either elementary geometric shapes (EGS) or triangulated surface (TS) models. EGS models are smooth but not generic. They can only model implants that have simple canonical shapes. In contrast, TS models are generic but not smooth. They can model both basic and free-form shapes but not as smooth as EGS models. The degree of smoothness depends on the number of triangles used. In this thesis, we introduce Non-uniform Rational B-Splines (NURBS) models that are both generic and smooth. Two algorithms were developed: 1) A fitting algorithm that fits multi-patch NURBS models to unorganized point clouds representing the surface of the implants. 2) An RSA algorithm that fits the NURBS models to points measured in radiographs. To evaluate the algorithms, NURBS models of a femoral head and an acetabular component were generated by the fitting algorithm. The femoral head penetration into the acetabular component was computed by the NURBS-based RSA algorithm using clinical double examinations for a single hip replacement patient. The precision of the NURBS-based RSA algorithm for computing the femoral head penetrationis comparable to the reported precision of a state-of-the-art EGS based RSA algorithm for solving the same problem. This result suggests that NURBS models can be a good alternative to the current models used in MBRSA.

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ROCHA, F. F. "NURBS e o Método Isogeométrico." Universidade Federal do Espírito Santo, 2016. http://repositorio.ufes.br/handle/10/7511.

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Made available in DSpace on 2018-08-01T22:30:15Z (GMT). No. of bitstreams: 1 tese_9660_Dissertacao Franciane.pdf: 4141301 bytes, checksum: 42c09361dbaab4c4ff855fc143755311 (MD5) Previous issue date: 2016-02-26
O método isogeométrico foi introduzido em 2005 por Hughes [1], quando foi colocado como um novo método para a análise de problemas descritos por Equações Diferenciais Parciais (EDP). O método tem muitas características em comum com o FEM [2] e é geometricamente baseado em NURBS [3], teoria bastante utilizada em Computação Gráfica para modelagem com excelente precisão de objetos tais como curvas e superfícies. Apesar da ideia do método ser simples a prática é complicada. Não é automática a transição da representação no contexto de CAGD (Computer Aided Geometric Design) para o de FEM. Vuong fez uma abordagem nesse sentido para o caso bidimensional [4]. Representar a resolução de EDP por base de funções NURBS é um desafio de interação entre a análise de elementos finitos e a tecnologia geométrica computacional, que antes trabalhavam com os mesmos objetos mas de forma independente. Os principais resultados mais recentes, sob uma perspectiva da análise numérica [5], e também com perspectiva de aplicações [6], mostram que essa interação tem impulsionado o desenvolvimento do método Isogeométrico. Nesta dissertação, a aluna irá desenvolver a teoria do método Isogométrico de maneira matematicamente consistente e irá obter resultados computacionalmente robustos com aplicações de um algoritmo também desenvolvido pela aluna em problemas clássicos que envolvem EDP.

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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 interpolation and image help of polynimals such as (bi)linear, (bi)quadratic and (bi)kubic method. Then work theoretically analyzes the theory of individual species curves and splines. More specifically, coming to their most frequently used variants of B-spline curves and ther generalizations called NURBS, with addressing the problem of interpolating these curves. The final chapter consists of the results achieved in the program MATLAB.

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Minetto, Ciliane de Fátima. "Um estudo sobre curvas NURBS." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2003. http://hdl.handle.net/10183/3686.

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O objetivo primordial desse trabalho está concentrado no estudo de Curvas NURBS (B-spline Racional N˜ao-Uniforme). A literatura em português sobre NURBS é escassa, pouco difundida e os textos e artigos existentes tendem a ser rigorosos, longos e teóricos. Assim, o presente estudo está direcionado para os conceitos matemáticos de NURBS, para o qual foi utilizado uma ferramenta chamada DesignMentor com a finalidade de testar os algoritmos desses conceitos. NURBS são funções paramétricas que podem representar qualquer tipo de curva. NURBS são usadas em computação gráfica na indústria de CAD/CAM e estão sendo consideradas um padrão para criar e representar objetos complexos (indústria automobilística, aviação e embarcação). As ferramentas de criação gráfica mais sofisticadas provêem uma interface para usar NURBS, que são flexíveis suficiente para projetar uma grande variedade de formas. Hoje é possível verificar o uso expandido de NURBS, modelando objetos para as artes visuais, arte e escultura; também estão sendo usados para modelar cenas para aplicações de realidade virtual. NURBS trabalha bem em modelagem 3D, permitindo facilidade para manipular e controlar vértices, controlar curvatura e suavidade de contornos. NURBS provêm uma base matemática, unificada para representar formas analíticas e livres além de manter exatidão e independência de resolução matemática.

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Viergutz, Gudrun. "Nicht nur Sibelius!" Universitätsbibliothek Leipzig, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-219137.

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Fabian Dahlström / Mikko Heiniö / Erkki Salmenhaara, Suomen musiikin historia [Die Geschichte der Musik Finnlands], 4 Bde, Porvoo (Verlag Werner Söderström) 1995/96. Das Erscheinen einer nationalen Musikgeschichte zu einem Zeitpunkt, wo uns übernationale Zusammenhänge und Gemeinsamkeiten mehr interessieren als eine von Landesgrenzen bestimmte Eigengeschichte, läßt verwundern. Auf ein Werk dieser Art hat man jedoch in Finnland lange gewartet. Seit der Herausgabe der vorigen Musikgeschichte Toivo Haapanens "Die Tonkunst Finnlands", sind über fünfzig Jahre vergangen und obgleich dieser einbändige Abriß vielen Generationen von Musikstudenten treu gedient hat, ist er heute veraltet und in vieler Weise überholt. Eine derart gründliche Musikgeschichte des Landes, wie sie das hier vorzustellende Werk darstellt, hat es bisher nicht gegeben.

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Books on the topic "NURB"

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NURB curves and surfaces: From projective geometry to practical use. Wellesley, Mass: A.K. Peters, 1995.

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Kâmil, Gören Ahmet, and Uçar Neslihan, eds. 100 koleksiyondan 100 Nur İyem: 100 Nuri İyem from 100 collections. Beyoğlu, İstanbul: Türkiye İş Bankası Kültür Yayınları, 2010.

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Meyer, Matthew James. Numb. [Saint Paul, MN]: Falling Leaf Press, 2006.

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Pons, Ponç. Nura. Barcelona: Quaderns Crema, 2006.

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Padwal, Sunil. Numb. New Delhi: Vadehra Art Gallery, 2007.

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Grabien, Deborah. Comfortably numb. San Francisco: Plus One Press, 2013.

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Kościów, Aleksander. Świat nura. Warszawa: Warszawskie Wydawnictwo Literackie Muza SA, 2006.

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Vaswani, T. L. Nuri granth. New Delhi: Sterling Publishers, 2003.

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English, Sharon. Uncomfortably numb. Erin, ON: Porcupine's Quill, 2002.

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Barber, Charles. Comfortably Numb. New York: Knopf Doubleday Publishing Group, 2008.

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Book chapters on the topic "NURB"

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Hong, Xia, and Sheng Chen. "PSO Assisted NURB Neural Network Identification." In Lecture Notes in Computer Science, 1–9. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31588-6_1.

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Reiter, Alexander. "NURBS Curves." In Time-Optimal Trajectory Planning for Redundant Robots, 5–14. Wiesbaden: Springer Fachmedien Wiesbaden, 2016. http://dx.doi.org/10.1007/978-3-658-12701-5_2.

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Yurigan, Joseph J., and Todd M. Oravitz. "Comfortably Numb." In A Case Approach to Perioperative Drug-Drug Interactions, 187–91. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4614-7495-1_37.

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Piegl, Les, and Wayne Tiller. "Curve and Surface Basics." In The NURBS Book, 1–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-59223-2_1.

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Piegl, Les, and Wayne Tiller. "Advanced Surface Construction Techniques." In The NURBS Book, 455–507. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-59223-2_10.

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Piegl, Les, and Wayne Tiller. "Shape Modification Tools." In The NURBS Book, 509–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-59223-2_11.

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Piegl, Les, and Wayne Tiller. "Standards and Data Exchange." In The NURBS Book, 571–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-59223-2_12.

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Piegl, Les, and Wayne Tiller. "B-spline Programming Concepts." In The NURBS Book, 593–628. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-59223-2_13.

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Piegl, Les, and Wayne Tiller. "B-Spline Basis Functions." In The NURBS Book, 47–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-59223-2_2.

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Piegl, Les, and Wayne Tiller. "B-spline Curves and Surfaces." In The NURBS Book, 81–116. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-59223-2_3.

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Conference papers on the topic "NURB"

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Wang, Xuefu, Fuhua (Frank) Cheng, Jiaguang Sun, and Brian A. Barsky. "Boundary Representation, Intersection, and Evaluation of Nurb Based Non-Manifold Objects." In ASME 1996 Design Engineering Technical Conferences and Computers in Engineering Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-detc/dfm-1297.

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Abstract Boundary representation (B-rep), intersection, and evaluation schemes for NURB based non-manifold CSG objects are presented. The B-rep scheme follows a top-down, face-based approach. A definition of non-manifold objects and their set operations are given. The boundary evaluation process follows the intersect-merge-select strategy of Weiler (Weiler 1986). The generation of intersection geometry is performed in a bottom-up strategy. Intersection algorithms between entities of same and different dimensions are studied. The computation of face/face intersection is based on the concept of the marching method (Barnhill et al 1987; Barnhill & Kersey 1990). Several techniques have been developed to enhance the marching process, including the computation of initial points and tracing step sizes, control of intersection precision, and handling of branch points and tangential intersection curves (points). Inconsistency of the intersection results is corrected using criteria based on topological adjacency information. The proposed method finds all internal loops without performing loop detection (Hohmeyer 1991). New topological entities corresponding to the intersection results are created in the parameter space for each entity. These include vertices, edges and faces, but not 3D shells. The creation of topological faces is carried out by generating the boundary of each new face while traverse a net structure created during the intersection geometry generation process. Subsequent classification and selection are performed based on 2D topological entities, instead of 3D shells. The proposed methods has been implemented as the core of a NURB-based non-manifold modeling system.

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Wang, Jue, and Derek Yip-Hoi. "Solid Modeling of In-Process Workpiece Geometry for Hole Milling." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70550.

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Capturing the in-process workpiece geometry generated during machining is an important part of tool path verification and increasingly the physics-based simulation of cutting forces used in Virtual Machining. Swept volume generation is a key supporting methodology that is necessary for generating these in-process states. Hole milling is representative of one class of milling operation where the swept volume is continuously intersecting. Due to this it is impossible to decompose the tool path into non-intersecting regions which is typically the approach used in solid model based swept volume generation. In this paper an approach to generating NURBS based solid models for self-intersecting swept volumes generated during hole milling is presented. NURB surfaces are generated that compactly represent the surfaces of the swept volume. This utilizes the geometry of the helical curve as opposed to a linearly interpolated tool path that is used for more generic approaches to generating swept volumes. Examples applying the approach to various types of cutter geometries used in milling are presented.

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Lee, Yuan-Shin, and Tien-Chien Chang. "Automated Process Planning and Machining for Sculptured Surface Cavities." In ASME 1991 International Computers in Engineering Conference and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/cie1991-0024.

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Abstract Sculptured surfaces often appear in mechanical parts of various industrial products as external form or the functional surface and are commonly found in molds and dies. In this study a sculptured surface is defined by a Non-Uniform Rational B-spline (NURB) surface that provides the flexibility and freedom for surface description. The work proposed here includes the evaluation of machining information, decision for machining process sequence selection, automatic cutter selection, and cutter path generation. Machining information is first evaluated by using series of hunting planes, calculating the geometric shape and constraints of the machining cavity. A decision on the process sequence is made based on the evaluated machining information. The cutter size is automatically determined by considering geometric constraints, the maximum material removal rate in roughing process and the minimum cutter movement with the required accuracy in finishing process. The roughing process is done by some pocketing procedures that consider arbitrary shaped pockets with islands on the cutting planes. Cutter movement and cutter selection are optimized by considering machining conditions on adjacent cutting planes. An integrated system called CASCAM has been developed to prove the feasibility of the proposed approach.

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Hafner, Michae¨l A., Thomas A. Holst, and Scott A. Billington. "Blade Tip Measurement Advanced Visualization Using a Three Dimensional Representation." In ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-46523.

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A microwave tip clearance sensor capable of measuring the hottest stages of industrial and aero gas turbines has been developed. This new microwave sensor has been integrated into a commercial package for online real-time monitoring of machine data. However, data analysis of large numbers of tip clearance probes makes standard industry graphic techniques cluttered. A method has been developed to reduce this data and visualize it in order to provide intuitive representations of the data from which a user can quickly draw the right conclusions about machine behavior. The main motivation for the development of a 3D graphical user interface is the density of information that can be shown to the user at one time. Tip clearance measurement is very data-rich, as every individual blade for each sensor mounted around the engine case is available. The result is that it may be difficult to find slight changes within hundreds of clearance trends. Only specialists with long experience in tip clearance measurement can synthesize all the data quickly enough using standard 2D plots. The 3D graphical user interface brings all of this data together to calculate the aggregated blade pattern, rotor positioning, and estimated case shape. All of these measurements are available to the user in a single visualization. Colors indicating alarm or clearance scale quickly draw attention to the most important data such as the minimum clearance point around the engine case where a rub may be likely to occur. This method is based about a case shape fitting algorithm that combines data from multiple sensors to make a case shape estimate based on fitting of a non-uniform rational B-spline (NURB). The scaling is also distorted in order to accentuate the graphics in a way that provides an intuitive understanding of the machine state. The method of applying this data accentuation is important so as to not be misleading. This innovative navigation interface presented in this paper capitalizes on modern advances in computer graphics to aid engineers and operators in understanding, access, monitoring, and analysis of tip clearance and air-gap measurements.

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Vliet, Kendra Vander. "Nuri." In ACM SIGGRAPH ASIA 2009 Computer Animation Festival. New York, New York, USA: ACM Press, 2009. http://dx.doi.org/10.1145/1665208.1665256.

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Walters, M. Scott. "NUBB." In the 33rd annual ACM SIGUCCS conference. New York, New York, USA: ACM Press, 2005. http://dx.doi.org/10.1145/1099435.1099529.

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Lee, Taeil. "Numb." In SA '19: SIGGRAPH Asia 2019. New York, NY, USA: ACM, 2019. http://dx.doi.org/10.1145/3354918.3366356.

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Wen, Manhong, and Kwun-Lon Ting. "From NURBS to C-NURBS: I — C-NURBS Curves and Their Properties." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/cie-9106.

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Abstract This paper develops a new free-form model, called c-NURBS, which is a general model of NURBS. A c-NURBS curve or surface is the projection of a 6D B-spline curve from a 6D homogeneous space H6 into a 3D space R3. The construction procedure of a c-NURBS curve or surface is that using cubic curves or bicubic patches repeatedly and piecewisely interpolates the given control points. The distinct properties of c-NURBS include independent weight modification, super-convexity, strong c-convex hull, and hidden degrees and control points. These properties greatly enhance the shape control and modification capability. All techniques developed for NURBS, such as the de Boor-Cox algorithm, knot insertion, and degree elevation and reduction, can be applied to c-NURBS. The implementation of c-NURBS requires little improvement on the CAD/CAM systems based on NURBS.

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Wen, Manhong, and Kwun-Lon Ting. "From NURBS to C-NURBS: II — C-NURBS Surfaces and C-Bezier Triangles." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/cie-9107.

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Abstract This paper develops c-NURBS surfaces and c-Bezier triangles. The projection from 6D homogenous space to 3D vector space developed in previous papers [12, 13] is applied to surfaces. As a result, a c-NURBS surface can be constructed using bicubic patches to interpolate the given control points with the de Boor-Cox algorithm. Based on this, c-NURBS surfaces have the properties of independent weight modification, super-convexity, strong c-convex hull, and hidden degrees and control points. A c-Bezier triangle can be constructed using cubic patches to interpolate the given control points with the de Casteljau algorithm. Based on this, the c-Bezier triangle has the properties of independent weight modification, super-convexity, and hidden degrees and control points. These properties provide great convenience for shape control and modification operations.

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Brunet, Florent, Adrien Bartoli, Nassir Navab, and Rémy Malgouyres. "NURBS Warps." In British Machine Vision Conference 2009. British Machine Vision Association, 2009. http://dx.doi.org/10.5244/c.23.111.

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Reports on the topic "NURB"

1

Svaren, John. Regulation of Egr1 Target Genes by the Nurd Chromatin Remodeling Complex. Fort Belvoir, VA: Defense Technical Information Center, June 2008. http://dx.doi.org/10.21236/ada486655.

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Svaren, John. Regulation of Egr1 Target Genes by the NuRD Chromatin Remodeling Complex. Fort Belvoir, VA: Defense Technical Information Center, December 2006. http://dx.doi.org/10.21236/ada462690.

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Cichorowski, Georg. Städteforschung: Stadt als Gegenstand interdisziplinärer Forschung - nur ein einfacher Perspektivwechsel? Sonderforschungsgruppe Institutionenanalyse, 2011. http://dx.doi.org/10.46850/sofia.9783941627147.

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Die Darmstädter Städteforschung nimmt nicht den Blickwinkel ein, dass die Stadt ausschließlich eine Schaubühne allgemeiner gesellschaftlicher Prozesse sei, die aufgrund ihrer Verdichtung in der Stadt hier besonders augenfällig und besser zu analysieren seien, sondern stellt das Charakteristische einzelner Städte, ihre Individualität in den Mittelpunkt ihrer Untersuchungen (s. z.B. Berking/Löw 2008). Daraus könnte in einer weiteren Phase eine Systematik von Städte- ‚Charakteren‘ entstehen. Die aus Innen- wie Außensicht evidenten Differenzen zwischen Städten gehen zurück auf vielfältige lokal vorfindbare Prägungen materieller, sozialer und kultureller Art. Sie manifestieren sich im äußeren Erscheinungsbild, aber auch in Kultur und Mentalität der jeweiligen Stadt. „Städtische Eigenlogik bezeichnet die dauerhaften Dispositionen, die an die Sozialität und Materialität von Städten gebunden sind, und konstituiert sich in einem relationalen System globaler, lokaler und nationaler Bezüge“ (Löw 2008a: 49). Das Konzept zielt also auf die Frage, wie eine Stadt „tickt“, wie sie sich in ihren Wahrnehmungs- und Handlungsmustern von einer anderen Stadt unterscheidet (s.a. FGB 2010). Für die beteiligten Forscher stellt sich die Frage, wie die eigensinnige, lokal spezifische Wirklichkeit dieser Stadt im Unterschied zu jener Stadt theoretisch und empirisch erfasst werden kann. Als grundlegender Untersuchungsschritt bietet sich der Städtevergleich an, weil Unterschiede zwischen Städten hier am klarsten sichtbar und damit für die wissenschaftliche Erforschung operationalisierbar werden. „Das Eigene der Städte entwickelt sich sowohl aufgrund historisch motivierter Erzählungen und Erfahrungen als auch im relationalen Vergleich zu formgleichen Gebilden, das heißt zu anderen Städten. Städtische Eigenlogik betont sowohl die eigensinnige Entwicklung einer Stadt als auch deren daraus resultierende kreative Kraft der Strukturierung von Praxis“ (LÖW 2008a: 43). Die Logik einer Stadt wird also in anderen Städten mitgeformt, sie ist ein „ortsbezogener Prozess, der nicht nur an einem Ort stattfindet“ (Löw 2008b: 100) und erfordert daher ein komparatives Forschungsdesign, da das Eigene nur in der Differenz erkannt werden kann (Frank 2010: 14f)“FGB 2010.

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Stockhorst, Hermann, Sabine Fabricius, and Bettina Wiegmann. So wird aus einer Messehalle ein Corona-Behelfskrankenhaus - in nur fünf Wochen. MWV Medizinisch Wissenschaftliche Verlagsgesellschaft, October 2020. http://dx.doi.org/10.32745/wcfm-17.

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Wiltse, M. A. National uranium resource evaluation (NURE) geochemical data for stream and lake sediment samples, Alaska, Anchorage Quadrangle. Alaska Division of Geological & Geophysical Surveys, 1991. http://dx.doi.org/10.14509/1492.

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Wiltse, M. A. National uranium resource evaluation (NURE) geochemical data for stream and lake sediment samples, Alaska, Nulato Quadrangle. Alaska Division of Geological & Geophysical Surveys, 1991. http://dx.doi.org/10.14509/1494.

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Wiltse, M. A. National uranium resource evaluation (NURE) geochemical data for stream and lake sediment samples, Alaska, Beaver Quadrangle. Alaska Division of Geological & Geophysical Surveys, 1991. http://dx.doi.org/10.14509/1495.

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Wiltse, M. A. National uranium resource evaluation (NURE) geochemical data for stream and lake sediment samples, Alaska, Bettles Quadrangle. Alaska Division of Geological & Geophysical Surveys, 1991. http://dx.doi.org/10.14509/1496.

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Wiltse, M. A. National uranium resource evaluation (NURE) geochemical data for stream and lake sediment samples, Alaska, Ruby Quadrangle. Alaska Division of Geological & Geophysical Surveys, 1991. http://dx.doi.org/10.14509/1497.

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Wiltse, M. A. National uranium resource evaluation (NURE) geochemical data for stream and lake sediment samples, Alaska, Selawik Quadrangle. Alaska Division of Geological & Geophysical Surveys, 1991. http://dx.doi.org/10.14509/1499.

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