Academic literature on the topic 'Octree'

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Journal articles on the topic "Octree"

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Wang, Jin Min, Lu Feng Luo, and Ying Liu. "A New Algorithm for the Boundary Representation of Octree Model." Applied Mechanics and Materials 220-223 (November 2012): 2857–61. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.2857.

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According to the space structure of octree and the neighbor of octree node,a new algorithm for calculating the boundary representation of octree model is put forward. The algorithm is started by minimum nodes of octrees and then gradually to increase into the biggest node of octrees, thus avoided the decomposition of some node effectively. For raising the calculation efficiency of algorithm, the integral “bit” is used to record the status of node and carry on judging. Theory analysis and examples validate the rationality and efficiency of the algorithm.
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SWIFT, L. K., T. JOHNSON, and P. E. LIVADAS. "PARALLEL CREATION OF LINEAR OCTREES FROM QUADTREE SLICES." Parallel Processing Letters 04, no. 04 (1994): 447–53. http://dx.doi.org/10.1142/s0129626494000417.

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Quadtrees and octrees are hierarchical data structures for efficiently storing image data. Quadtrees represent two dimensional images, while octrees are a generalization to three dimensions. The linear form of each is an abstraction of the tree structure to reduce storage requirements. We have developed a parallel algorithm to efficiently create a linear octree from quadtree slices of an object without the use of an intermediate data structure. We also propose the d-slice, which is a generalization of an octree, and which efficiently represents non-cubic volumes.
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Wang, Peng-Shuai. "OctFormer: Octree-based Transformers for 3D Point Clouds." ACM Transactions on Graphics 42, no. 4 (2023): 1–11. http://dx.doi.org/10.1145/3592131.

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We propose octree-based transformers, named OctFormer, for 3D point cloud learning. OctFormer can not only serve as a general and effective backbone for 3D point cloud segmentation and object detection but also have linear complexity and is scalable for large-scale point clouds. The key challenge in applying transformers to point clouds is reducing the quadratic, thus overwhelming, computation complexity of attentions. To combat this issue, several works divide point clouds into non-overlapping windows and constrain attentions in each local window. However, the point number in each window vari
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CHAUDHARY, VIPIN, K. KUMARI, P. ARUNACHALAM, and J. K. AGGARWAL. "MANIPULATIONS OF OCTREES AND QUADTREES ON MULTIPROCESSORS." International Journal of Pattern Recognition and Artificial Intelligence 08, no. 02 (1994): 439–55. http://dx.doi.org/10.1142/s0218001494000218.

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Octrees offer a powerful means for representing and manipulating 3-D objects. This paper presents an implementation of octree manipulations using a new approach on a shared memory architecture. Octrees are hierarchical data structures used to model 3-D objects. The manipulation of these data structures involves performing independent computations on each node of the octree. Octrees are much easier to deal with than other forms of representations used to model 3-D objects especially where extensive manipulations are involved. When these operations are distributed among multiple processing eleme
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Miltiadou, Milto, Neill D. F. Campbell, Darren Cosker, and Michael G. Grant. "A Comparative Study about Data Structures Used for Efficient Management of Voxelised Full-Waveform Airborne LiDAR Data during 3D Polygonal Model Creation." Remote Sensing 13, no. 4 (2021): 559. http://dx.doi.org/10.3390/rs13040559.

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In this paper, we investigate the performance of six data structures for managing voxelised full-waveform airborne LiDAR data during 3D polygonal model creation. While full-waveform LiDAR data has been available for over a decade, extraction of peak points is the most widely used approach of interpreting them. The increased information stored within the waveform data makes interpretation and handling difficult. It is, therefore, important to research which data structures are more appropriate for storing and interpreting the data. In this paper, we investigate the performance of six data struc
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SCHNEIDERS, ROBERT. "OCTREE-BASED HEXAHEDRAL MESH GENERATION." International Journal of Computational Geometry & Applications 10, no. 04 (2000): 383–98. http://dx.doi.org/10.1142/s021819590000022x.

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An octree-based algorithm for the generation of hexahedral element meshes is presented. The algorithm works in three steps: (i) The geometry to be meshed is approximated by an octree structure. (ii) An unstructured hexahedral element mesh is derived from the octree. (iii) The mesh is adapted to the boundary of the geometry. We focus on step (ii) and describe an algorithm that constructs a hex mesh for a given octree structure.
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Han, Soohee. "Towards Efficient Implementation of an Octree for a Large 3D Point Cloud." Sensors 18, no. 12 (2018): 4398. http://dx.doi.org/10.3390/s18124398.

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The present study introduces an efficient algorithm to construct a file-based octree for a large 3D point cloud. However, the algorithm was very slow compared with a memory-based approach, and got even worse when using a 3D point cloud scanned in longish objects like tunnels and corridors. The defects were addressed by implementing a semi-isometric octree group. The approach implements several semi-isometric octrees in a group, which tightly covers the 3D point cloud, though each octree along with its leaf node still maintains an isometric shape. The proposed approach was tested using three 3D
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Benson, David, and Joel Davis. "Octree textures." ACM Transactions on Graphics 21, no. 3 (2002): 785–90. http://dx.doi.org/10.1145/566654.566652.

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Zhou, H. M., Z. G. Liu, M. X. Li, and B. H. Lu. "A Fast Reconstruction of Dense Unorganized Point Cloud Based on 3-Color Octree." Materials Science Forum 628-629 (August 2009): 293–98. http://dx.doi.org/10.4028/www.scientific.net/msf.628-629.293.

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This paper describes a fast reconstruction algorithm of implicit model based on 3-color octree structure for dense unorganized point cloud. At first, the point cloud is stored with an extended octree, 3-color octree. Aiming at this 3-color octree structure a new node watershed algorithm is presented with a higher efficiency to estimate the signs of subdivided leaf nodes. So the leaf nodes are divided into three types: interior, boundary and exterior nodes. To quickly reconstruct the model we sample the 3-color octree structure only at boundary nodes, which greatly reduces the number of sampled
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Yujian, Wang, Tan Shaowei, Dong Weiwei, and Jing Wenpeng. "Research on 3D Modeling Method Based on Hybrid Octree Structure." Open Electrical & Electronic Engineering Journal 8, no. 1 (2014): 323–29. http://dx.doi.org/10.2174/1874129001408010323.

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With studying deeply of the three-dimensional modeling method, this paper proposed a hybrid data model which based on Octree,the four fork tree and NURBS. The characteristic of fast convergence of Octree is used to segment the 3D entity. Describe the irregular surface of entity by NURBS, and restructure the local mesh surface. The model uses the mixture data structure of Octree and four fork tree to restructure mesh surface gradually. The storage structure is the Octree structure type; establish Hash table based on octal prefix code. Finally, an experimental model system is designed by using O
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Dissertations / Theses on the topic "Octree"

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Millar, Richard James. "Octree construction for imaging." Thesis, University of Ulster, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386237.

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Kim, Jaehyun 1970. "NC verification using octree." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9880.

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Ho, Sheung-Lai Sunny. "Solid modelling using linear octree representation." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24684.

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Object representation is the backbone of any solid modelling system. Hierarchical spatial decompositions of objects called octrees introduced very efficient algorithms for boolean set operations and some restricted classes of geometric transformations. Linear octrees, a compact encoding of the octrees, result in a significant reduction of storage requirements, and lead simpler algorithms for most modelling operations. This thesis investigates some properties of linear octrees with emphasis on object generation. By interpreting linear octree node digits as binary numbers, some simple conversi
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Flynn, Sean A. "Adaptive Fluid Simulation Using a Linear Octree Structure." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6837.

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An Eulerian approach to fluid flow provides an efficient, stable paradigm for realistic fluid simulation. However, its traditional reliance on a fixed-resolution grid is not ideal for simulations that simultaneously exhibit both large and small-scale fluid phenomena. Octree-based fluid simulation approaches have provided the needed adaptivity, but the inherent weakness of a pointer-based tree structure has limited their effectiveness. We present a linear octree structure that provides a significant runtime speedup using these octree-based simulation algorithms. As memory prices continue to dec
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黃永耀 and Wing-yiu Wong. "An octree and face oriented approach for NC machining." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1989. http://hub.hku.hk/bib/B3120899X.

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Shevelko, Alexander V. "Octree-based projection mesh generation for complex 'dirty' geometries." Thesis, University of Brighton, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438531.

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Wong, Wing-yiu. "An octree and face oriented approach for NC machining /." [Hong Kong : University of Hong Kong], 1989. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12385852.

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Flajšingr, Petr. "Realistické zobrazování voxelových scén v reálném čase." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2021. http://www.nusl.cz/ntk/nusl-449179.

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The subject of this thesis is an implementation of realistic rendering of voxel scenes using a graphics card. This work explains the fundamentals of realistic rendering and voxel representation of visual data. It also presents selected hierarchical structures usable for acceleration and describes the desing of a solution focusing on the representation of voxel data and their rendering. The thesis describes libraries created as part of the project and algorithms. It also evaluates time and memory requirements of the application along with graphical output.
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Dunstan, Steven Paul. "Octree solid modelling applications in geology and open pit design." Thesis, Imperial College London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296412.

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Sun, Che. "Many-Light Real-Time Global Illumination using Sparse Voxel Octree." Digital WPI, 2015. https://digitalcommons.wpi.edu/etd-theses/1125.

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"Global illumination (GI) rendering simulates the propagation of light through a 3D volume and its interaction with surfaces, dramatically increasing the fidelity of computer generated images. While off-line GI algorithms such as ray tracing and radiosity can generate physically accurate images, their rendering speeds are too slow for real-time applications. The many-light method is one of many novel emerging real-time global illumination algorithms. However, it requires many shadow maps to be generated for Virtual Point Light (VPL) visibility tests, which reduces its efficiency. Prior solutio
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Books on the topic "Octree"

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Millar, Richard J. Octree construction for imaging. The author], 1989.

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Bellet, Maurice. Octone. Editions du cerf, 1987.

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Michel, Pierre. Octave Mirbeau. Association départementale pour l'Orne en français, 1992.

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Casgrain, H. R. Octave Crémazie. Librairie Beauchemin, 1995.

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Rinfret, Fernand. Octave Crémazie. Librairie J.E. Prévost, 1995.

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Crouch, Tom D. Octave Chanute. The Service, 1992.

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Alexandre, Dumas. Octave Auguste. Harmattan, 2014.

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Scott, Gary. The 65th octave. Sunstar Pub., 2001.

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Nagar, Sandeep. Introduction to Octave. Apress, 2018. http://dx.doi.org/10.1007/978-1-4842-3201-9.

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Saint-Michel), Colloque Octave Mirbeau (1991 Prieuré. Colloque Octave Mirbeau. Editions du Demi-Cercle, 1994.

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Book chapters on the topic "Octree"

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Shekhar, Shashi, and Hui Xiong. "Octree." In Encyclopedia of GIS. Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-35973-1_898.

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Weik, Martin H. "octree." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_12702.

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Sperber, Marci. "Quadtree and Octree." In Encyclopedia of GIS. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-23519-6_1056-2.

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Sperber, Marci. "Quadtree and Octree." In Encyclopedia of GIS. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-17885-1_1056.

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Sperber, Marci. "Quadtree and Octree." In Encyclopedia of GIS. Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-35973-1_1056.

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Veenstra, Jack, and Narendra Ahuja. "Deriving object octree from images." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/3-540-16042-6_11.

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Guerrieri, Ernesto, and Vinod Grover. "Octree Solid Modeling with Prolog." In Applications of Artificial Intelligence in Engineering Problems. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-662-21626-2_80.

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Zeng, Ming, Fukai Zhao, Jiaxiang Zheng, and Xinguo Liu. "A Memory-Efficient KinectFusion Using Octree." In Computational Visual Media. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-34263-9_30.

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Badouel, D., and G. Hégron. "Set Operation Evaluation Using Boolean Octree." In New Trends in Computer Graphics. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-83492-9_24.

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Yamaguchi, Kazunori, Toshiaki Satoh, and Tosiyasu L. Kunii. "Boundary File Generation from Octree Encoding." In Frontiers in Computer Graphics. Springer Japan, 1985. http://dx.doi.org/10.1007/978-4-431-68025-3_2.

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Conference papers on the topic "Octree"

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Zhu, Jun, Hongyi Li, Zhepeng Wang, Shengjie Wang, and Tao Zhang. "i-Octree: A Fast, Lightweight, and Dynamic Octree for Proximity Search." In 2024 IEEE International Conference on Robotics and Automation (ICRA). IEEE, 2024. http://dx.doi.org/10.1109/icra57147.2024.10611019.

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Massonnat, Quentin, and Clark Verbrugge. "Efficient Octree-based 3D Pathfinding." In 2024 IEEE Conference on Games (CoG). IEEE, 2024. http://dx.doi.org/10.1109/cog60054.2024.10645669.

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NONG, JIAN, Jian Xu, Xi He, Wenge Li, and Hongben Huang. "Octree k-nearest neighbor parallel query." In Fourth International Conference on Computer Vision and Pattern Analysis (ICCPA 2024), edited by Ji Zhao and Yonghui Yang. SPIE, 2024. http://dx.doi.org/10.1117/12.3037976.

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Lv, HongChao, Jun Wang, HongLiang Wang, and XingYu Zhou. "Voxelization Algorithm Based on Octree Spatial Averaging." In 2024 13th International Conference of Information and Communication Technology (ICTech). IEEE, 2024. https://doi.org/10.1109/ictech63197.2024.00070.

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Huang, Ren, Guiqi Wang, and Wei Zhang. "Density-Adaptive Octree-Based Point Cloud Geometry Compression." In 2024 International Conference on Ubiquitous Communication (Ucom). IEEE, 2024. http://dx.doi.org/10.1109/ucom62433.2024.10695889.

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Dai, Zuo, Jainzhong Cha, and Junliang Yuan. "An Octree-Based Heuristic Algorithm for 3-D Packing." In ASME 1994 Design Technical Conferences collocated with the ASME 1994 International Computers in Engineering Conference and Exhibition and the ASME 1994 8th Annual Database Symposium. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/detc1994-0120.

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Abstract Based on the Object-Oriented Simulation System for 3-D Packing developed by Dai & Cha (1993a), this paper presents an effective heuristic algorithm using the Octree Data Structure for the three-dimensional packing problems of irregular components. It also describes in detail the Tri-Ring Method which is designed for the topology identification of the octree’s construction. For those problems where the total volume of packed items is smaller than that of container, the results of the theoretical analysis and numerical experiments show that the heuristic is excellent both in packing
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Yu, Yongxiang, Minghua Wu, and Ji Zhou. "An Octree Algorithm for Dynamic Interference Detection Using Space Partitioning." 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/dac-1046.

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Abstract This paper presents an octree algorithm for collision and interference detection using space partitioning technique. The technique greatly reduces the computation time consumed in dynamic collision detection during simulation progress. The simulated objects are represented in hierarchically decomposed octrees. Under this technique, the checking space can be partitioned according to the geometric dependence of two octrees, so that the relations (overlap or separate) among the nodes in the octrees can be determined directly. Since heuristic calculation is excluded from the algorithm, th
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Zhang, Jingsheng, and Shana Smith. "Shape Similarity Matching With Octree Representations." In ASME 2006 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/detc2006-99397.

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Shape matching is one of the fundamental problems in content-based 3D shape retrieval. Since there are typically a large number of possible matches in a shape database, there is a crucial need to perform shape matching efficiently. As a result, shapes must be reduced into a simpler shape representation, and computational complexity is one of the most important criteria for evaluating 3D shape representations. To meet the need, the investigators have implemented a new effective and efficient approach for 3D shape matching, which uses a simplified octree representation of 3D mesh models. The sim
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Globus, Al. "Octree optimization." In Electronic Imaging '91, San Jose,CA, edited by Edward J. Farrell. SPIE, 1991. http://dx.doi.org/10.1117/12.44376.

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Benson, David, and Joel Davis. "Octree textures." In the 29th annual conference. ACM Press, 2002. http://dx.doi.org/10.1145/566570.566652.

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Reports on the topic "Octree"

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Martín, A., L. Cirrottola, A. Froehly, R. Rossi, and C. Soriano. D2.2 First release of the octree mesh-generation capabilities and of the parallel mesh adaptation kernel. Scipedia, 2021. http://dx.doi.org/10.23967/exaqute.2021.2.010.

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This document presents a description of the octree mesh-generation capabilities and of the parallel mesh adaptation kernel. As it is discussed in Section 1.3.2 of part B of the project proposal there are two parallel research lines aimed at developing scalable adaptive mesh refinement (AMR) algorithms and implementations. The first one is based on using octree-based mesh generation and adaptation for the whole simulation in combination with unfitted finite element methods (FEMs) and the use of algebraic constraints to deal with non-conformity of spaces. On the other hand the second strategy is
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Staten, Matthew L., and Steven James Owen. Parallel octree-based hexahedral mesh generation for eulerian to lagrangian conversion. Office of Scientific and Technical Information (OSTI), 2010. http://dx.doi.org/10.2172/1008123.

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ดีเอกนามกูล, วันชัย. การศึกษาปฏิสัมพันธ์ระหว่างสิ่งมีชีวิตและสารชีวเคมี ในระบบนิเวศของป่าเต็งรังและป่าผลัดใบในจังหวัดน่าน : รายงานผลการวิจัยฉบับสมบูรณ์. จุฬาลงกรณ์มหาวิทยาลัย, 2008. https://doi.org/10.58837/chula.res.2008.27.

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ศึกษาชนิดและโครงสร้างทางเคมีของสารหอมระเหยในบรรยากาศของระบบนิเวศของป่าในเขตอุทยานแห่งชาติดอยภูคา ที่มีผลต่อการขับไล่หรือดึงดูดแมลงชนิดต่างๆ ที่อยู่ในบริเวณหนึ่งๆ โครงการนี้ได้พัฒนาเครื่องดูดซับสารหอมระเหยในบรรยากาศ เพื่อติดตั้งในเส้นทางป่าจำนวน 15 จุดที่ต่อเนื่องกัน ซึ่งแต่ละจุดมีการวางแผ่นกาวเพื่อดักจับแมลงเพื่อให้ได้ข้อมูลในแง่ชนิดและปริมาณของแมลงแต่ละชนิด การเก็บข้อมูลได้ดำเนินการ 4 ครั้งในระยะ 2 ปี (ตุลาคม 2548, มีนาคม 2549, กุมภาพันธ์ 2550 และพฤศจิกายน 2550) โดยแต่ละครั้งได้นำตัวอย่างมาวิเคราะห์ชนิดของสารเคมีโดยเครื่อง GC-MS ควบคู่กับการวิเคราะห์ชนิดของแมลงที่ติดอยู่กับแผ่นกาว จากการศึกษา
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Martin, Robert S., and Jean-Luc Cambier. Moment Preserving Adaptive Particle Weights using Octree Velocity Distributions for PIC Simulations. Defense Technical Information Center, 2012. http://dx.doi.org/10.21236/ada593065.

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Chandra, B. R. Threaded octree structures for fast neighbor voxel processing in a parallel ray tracer. Portland State University Library, 2000. http://dx.doi.org/10.15760/etd.5859.

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Libres, Don. Modeling dynamic surfaces with octrees. National Institute of Standards and Technology, 1989. http://dx.doi.org/10.6028/nist.ir.89-4055.

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Alberts, Christopher, Audrey Dorofee, James Stevens, and Carol Woody. OCTAVE-S (Registered) Implementation Guide, Version 1.0. Volume 1: Introduction to OCTAVE-S. Defense Technical Information Center, 2005. http://dx.doi.org/10.21236/ada453304.

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Moriarty, Kristi. High Octane Fuel: Terminal Backgrounder. Office of Scientific and Technical Information (OSTI), 2016. http://dx.doi.org/10.2172/1239243.

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Alberts, Christopher, Audrey Dorofee, James Stevens, and Carol Woody. Introduction to the OCTAVE Approach. Defense Technical Information Center, 2003. http://dx.doi.org/10.21236/ada634134.

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COORDINATING RESEARCH COUNCIL INC ATLANTA GA. 1987 CRC Octane Number Requirement Survey. Defense Technical Information Center, 1988. http://dx.doi.org/10.21236/ada201482.

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