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Artykuły w czasopismach na temat „Boundary representation (BRep)”

Autor: Grafiati
Data publikacji: 3 czerwca 2025
Data aktualizacji: 31 lipca 2025

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Sprawdź 15 najlepszych artykułów w czasopismach naukowych na temat „Boundary representation (BRep)”.

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1

VANĚČEK, GEORGE. "BREP-INDEX: A MULTIDIMENSIONAL SPACE PARTITIONING TREE." International Journal of Computational Geometry & Applications 01, no. 03 (1991): 243–61. http://dx.doi.org/10.1142/s0218195991000189.

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In this paper we present the Brep-index, a multidimensional space partitioning data structure that provides quick spatial access to the vertices, edges and faces of a boundary representation (Brep), thus yielding a single unified representation for polyhedral solids. We give an algorithm for the construction of the Brep-index and prove its correctness. We show that its size is Ω(v+e+f), where v, e, and f are the number of vertices, edges, and faces of the Brep. The lower bound can be achieved for some Breps by compressing the structure using simple rewrite rules. We then demonstrate robust poi
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Jones, Benjamin, Dalton Hildreth, Duowen Chen, Ilya Baran, Vladimir G. Kim, and Adriana Schulz. "AutoMate." ACM Transactions on Graphics 40, no. 6 (2021): 1–18. http://dx.doi.org/10.1145/3478513.3480562.

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Assembly modeling is a core task of computer aided design (CAD), comprising around one third of the work in a CAD workflow. Optimizing this process therefore represents a huge opportunity in the design of a CAD system, but current research of assembly based modeling is not directly applicable to modern CAD systems because it eschews the dominant data structure of modern CAD: parametric boundary representations (BREPs). CAD assembly modeling defines assemblies as a system of pairwise constraints, called mates , between parts, which are defined relative to BREP topology rather than in world coor
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Stella, Orozco, Formella Arno, A. Cadavid Carlos, Ruiz Salguero Oscar, and Osorno Maria. "Geometry and Topology-based Segmentation of 2-Manifold Triangular Meshes in R3." British Journal of Applied Science & Technology 21, no. 1 (2017): 1–14. https://doi.org/10.9734/BJAST/2017/32827.

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This manuscript reports a geometrical and a topological methods to segment a closed triangular 2-manifold mesh M R3. The mesh M does not self-intersect) and has no border (i.e. watertight. Geometrical and topological segmentation methods require a Boundary Representation (BRep) fromM. Building the BRep forM uniforms the triangle orientations, and makes explicit triangle and edge - counter edge adjacency. In the context of Reverse Engineering, the sub-meshes produced by the segmentation are subsequently used to fit parametric surfaces, which are in turn trimmed by the sub-mesh boundaries (formi
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Zhang, Haowei, Si Sun, Heqing Lu, and Ying Liu. "CONSTRUCTION AND APPLICATION OF BREP PHANTOM FOR CHINESE WOMEN OF CHILDBEARING AGE IN RADIATION PROTECTION." Radiation Protection Dosimetry 189, no. 4 (2020): 407–19. http://dx.doi.org/10.1093/rpd/ncaa056.

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Abstract The purpose of this study is to construct boundary representation (BREP) phantom for Chinese women of childbearing age, to estimate the external radiation dose and to analyze radiation protection scheme. The BREP phantom for Chinese women of childbearing age was constructed by image segmentation, 3D reconstruction, non-uniform rational B-spline surface construction and voxelization. The photon-irradiated organ absorbed dose-conversion coefficients (DCCK) of the three female specific organs and the photon effective dose-conversion coefficient (ECCK) were calculated by Monte-Carlo metho
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Li, Yuan, and Bo Wu. "Relation-Constrained 3D Reconstruction of Buildings in Metropolitan Areas from Photogrammetric Point Clouds." Remote Sensing 13, no. 1 (2021): 129. http://dx.doi.org/10.3390/rs13010129.

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The complexity and variety of buildings and the defects of point cloud data are the main challenges faced by 3D urban reconstruction from point clouds, especially in metropolitan areas. In this paper, we developed a method that embeds multiple relations into a procedural modelling process for the automatic 3D reconstruction of buildings from photogrammetric point clouds. First, a hybrid tree of constructive solid geometry and boundary representation (CSG-BRep) was built to decompose the building bounding space into multiple polyhedral cells based on geometric-relation constraints. The cells th
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Huang, Ming, Xueyu Wu, Xianglei Liu, Tianhang Meng, and Peiyuan Zhu. "Integration of Constructive Solid Geometry and Boundary Representation (CSG-BRep) for 3D Modeling of Underground Cable Wells from Point Clouds." Remote Sensing 12, no. 9 (2020): 1452. http://dx.doi.org/10.3390/rs12091452.

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The preference of three-dimensional representation of underground cable wells from two-dimensional symbols is a developing trend, and three-dimensional (3D) point cloud data is widely used due to its high precision. In this study, we utilize the characteristics of 3D terrestrial lidar point cloud data to build a CSG-BRep 3D model of underground cable wells, whose spatial topological relationship is fully considered. In order to simplify the modeling process, first, point cloud simplification is performed; then, the point cloud main axis is extracted by OBB bounding box, and lastly the point cl
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Zankl, M., J. Becker, C. Lee, W. E. Bolch, Y. S. Yeom, and C. H. Kim. "Computational phantoms, ICRP/ICRU, and further developments." Annals of the ICRP 47, no. 3-4 (2018): 35–44. http://dx.doi.org/10.1177/0146645318756229.

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Phantoms simulating the human body play a central role in radiation dosimetry. The first computational body phantoms were based upon mathematical expressions describing idealised body organs. With the advent of more powerful computers in the 1980s, voxel phantoms have been developed. Being based on three-dimensional images of individuals, they offer a more realistic anatomy. Hence, the International Commission on Radiological Protection (ICRP) decided to construct voxel phantoms representative of the adult Reference Male and Reference Female for the update of organ dose coefficients. Further w
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8

Case, K., J. X. Gao, and N. N. Z. Gindy. "The Implementation of a Feature-Based Component Representation for CAD/CAM Integration." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 208, no. 1 (1994): 71–80. http://dx.doi.org/10.1243/pime_proc_1994_208_061_02.

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Recent research and development has the objective of increasing productivity and cost effectiveness by integrating many activities such as design, analysis, process planning, assembly planning and production planning which encompass the entire manufacturing planning and operational control aspects of a manufacturing enterprise. It has been recognized that a key to the integration lies in the determination of a representation scheme for products that can be interpreted for the various needs of these different applications. Geometric (solid) modellers were regarded by many researchers as the app
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9

Usmanov, Vjačeslav, Jan Illetško, and Rostislav Šulc. "Digital Plan of Brickwork Layout for Robotic Bricklaying Technology." Sustainability 13, no. 7 (2021): 3905. http://dx.doi.org/10.3390/su13073905.

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The trend of using modern technologies in the construction industry has been growing stronger recently, particularly in the fields of additive construction or robotic bricklaying. Therefore, specifically for the purpose of robotic bricklaying, we created a digital layout plan for robotic construction works. This article presents a universal methodology for creating a bricklaying plan for various variations of wall building systems. The method is based on the conversion of drawings from the BIM (Building Information Model) environment to the BREP (Boundary Representation) model through use of t
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Loeper, Yasmin, Markus Gerke, Ahmed Alamouri, Alexander Kern, Mohammad Shafi Bajauri, and Phillipp Fanta-Jende. "Visual localization in urban environments employing 3D city models." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-2/W8-2024 (December 14, 2024): 311–18. https://doi.org/10.5194/isprs-archives-xlviii-2-w8-2024-311-2024.

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Abstract. Reliable pose information is essential for many applications, such as for navigation or surveying tasks. Though GNSS is a well-established technique to retrieve that information, it often fails in urban environments due to signal occlusion or multi-path effects. In addition, GNSS might be subject to jamming or spoofing, which requires an alternative, complementary positioning method. We introduce a visual localization method which employs building models according to the CityGML standard. In contrast to the most commonly used sources for scene representation in visual localization, s
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11

Zhang, Haowei, Tiangui Zhang, XiaoLe Li, Ying Liu, and Li Sun. "Construction of tetrahedral mesh phantom for Chinese women of childbearing age." Journal of Radiological Protection, January 27, 2025. https://doi.org/10.1088/1361-6498/adaecd.

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Abstract Although the Boundary Representation (BREP) method creates detailed surface phantoms of Chinese women of childbearing age, these phantoms cannot be directly used in Monte Carlo simulations. They must first be converted into voxel phantoms, a process that may diminish some of the inherent advantages of the surface phantoms. Therefore, the aim of this study is to construct a tetrahedral mesh (TM) phantom of Chinese women of childbearing age based on the BREP phantom, incorporating micron-level structural refinements to certain organ tissues while maintaining the original model's structu
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Suhaimi, Mohd Azlan, Firdaus Mat Ghani, Jamaludin Mohd Taib, and Masine Md Tap. "GENERALIZATION OF MATHEMATICAL REPRESENTATION FOR TOOL PATH BASED ON BOUNDARY REPRESENTATION (BREPS) DATA STRUCTURE." Jurnal Teknologi 78, no. 1 (2015). http://dx.doi.org/10.11113/jt.v78.2850.

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A generic representation of linear and curvilinear entities with embedded motion attributes is possible via the integration of a Hermite curve and dynamic of motion. A Hermite curve will form the curve, while a dynamic of motion will position the vertices on the curves with the introduction of a delta distance (Δs). A three-phase algorithm is introduced to examine the applicability of generic representation in tool-path generation. The preprocessing stage will examine the input model prior to Phase I. Phase I will extract the BReps data, and these BReps data will be used in Phase II to develop
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13

Naher, Jasmin, Christopher R. Fielding, and Mike A. Martin. "Misleading Basin Margins—Analysis of the Upper Permian Succession in the Retroarc Foreland Bowen Basin of Northeast Australia." Basin Research 37, no. 3 (2025). https://doi.org/10.1111/bre.70033.

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ABSTRACTThe meridional, Permo–Triassic Bowen Basin of NE Australia became a retroarc foreland basin in the late Permian, with a mapped foredeep axis (Taroom Trough) running north–south adjacent to the eastern edge of the basin. The present outline of the basin is, nonetheless, shaped by significant structural deformation along its eastern margin, and stratigraphic pinch‐outs and erosional truncation in the west. The plan form of the basin thus gives a potentially misleading representation of the basin's original shape and extent. By analysing wireline log data from over 1000 drillholes, we dev
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14

Victoria, L. Fox1 Mariofana Milanova2 and Salim Al-Ali. "A MORPHOLOGICAL MULTIPHASE ACTIVE CONTOUR FOR VASCULAR SEGMENTATION." August 22, 2018. https://doi.org/10.5121/ijbb.2013.3301.

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International Journal on Bioinformatics & Biosciences (IJBB) Vol.3, No.3, September 2013 DOI: 10.5121/ijbb.2013.3301 1 A MORPHOLOGICAL MULTIPHASE ACTIVE CONTOUR FOR VASCULAR SEGMENTATION Victoria L. Fox1 , Mariofana Milanova2 , and Salim Al-Ali3 1Department of Applied Science, University of Arkansas at Little Rock, USA 2Department of Computer Science, University of Arkansas at Little Rock, USA 2Department of Computer Science, University of Arkansas at Little Rock, USA ABSTRACT This paper presents a morphological active contour ideal for vascular segmentation in biomedical images. The unenh
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Shilimi, Moono, and Li Yibin. "Factors that Contribute to the Objective and Subjective Career Success of Project Managers." North American Academic Research, August 14, 2019. https://doi.org/10.5281/zenodo.3367810.

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Introduction In new and expanding fields like electronics, nucleonic, astronautics, avionics, and cryogenics, a new type of manager is being bred. Although he goes by many titles, the one most generally used is the project manager. His role in the modern industry deserves more scrutiny than it has received from students of management and professional managers. Generally speaking, the project manager's business is to create a product — a piece of advanced technology hardware. The primary tool available to him is the brainpower of men who are professional specialists in diverse fields.
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