Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Triangular Mesh"”.
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Two-dimensional Euler computations on a triangular mesh using an upwind, finite-volume scheme
… solution of the Euler equations on unstructured, triangular meshes using a flux-difference split, upwind method. The procedure uses a dual mesh system to implement the finite-volume scheme using conserved variables stored at the vertices of the triangles. The vertices of the triangles are located …
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Wavelet-Based Multiresolution Surface Approximation from Height Fields
… surface approximation. This consists of a mesh of polygons that approximates the surfaces of the original data at a desired level of accuracy. Polygonal surface approximation of height fields has numerous applications in the fields of computer graphics and computer vision. Triangular mesh …
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Optimally stiffened thin shell structures in 3D printing.
… research discretizes the input geometry into a triangular mesh. The faces and edges of the mesh are taken as traditional plate and beam elements respectively. The contributions from stiffeners (beams) are assembled to corresponding plate elements and the coupled system is solved to obtain …
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Elastic Mesh Deformation for Internal Flows with Moving Boundaries
This project aims to study elastic-based mesh deformation for internal flow problems with obstructions. As such a tank with a flexible internal beam serves as the tested case employed in this work. As such a computer code was developed and the elastic deformation was implemented via the Finite …
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Optical and Thermal Radiative Simulation of an Earth Radiation Budget Instrument
… into the ray-trace environment using an STL triangular mesh. The instrument uses a single freeform mirror to focus radiation on the detector. A method for incorporating freeform surfaces into a ray-trace model is described. The development and capabilities of the model are reported. The model …
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Design of a morphing airfoil exhibiting bi-stability using topology optimization
… domains, one with a structured quadrilateral mesh and another with an unstructured triangular mesh, are investigated and compared. The effect of different optimization parameters on the final optimized structure and its behaviour has also been analyzed. The final result is a novel camber …
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Web-based modelling with applications to surgical training
… object represented by a uniform rectilinear mesh, is achieved in two ways. First, the algorithm is modified so that it can be applicable to a surface represented as a non-uniform rectilinear mesh. The modified algorithm, called SurfaceChainMail in this thesis, is implemented in the simulation …
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Real-time simulation and visualisation of cloth using edge-based adaptive meshes
… to their offline counterparts, since coarse meshes must often be employed for performance reasons. The focus of this thesis is to develop techniques to allow the real-time simulation of realistic cloth and clothing. Adaptive meshes have previously been developed to act as a bridge between low …
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Feature-based automatic registration of images with 2D and 3D models
… and presented in this thesis based on a 3D triangular-mesh model, which can be applied to approximate a de facto NURBS model, and images in which silhouette features can be extracted. The algorithm consists of a rough pose estimation process with shape comparison methods and a pose …
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Large-scale probabilistic aerial reconstruction
… evaluations. Our dense reconstructions (triangular mesh with texture information) are feasible with fewer observations of a given modality by relaying on others without sacrificing quality. Secondly, to enable large-scale reconstructions our formulation supports adaptive resolutions in …
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Development of Finite Element Modeling Mesh Generation and Analysis Software for Light Wood Frame Houses
… thesis presents the development of an automatic mesh generator, named WoodFrameMesh, using object oriented C++. The program developed is capable of generating complete finite element models of wooden houses incorporating frames, linear links, springs, nodal loads and restraints at the desired …
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Neural Representation for 3D Building Reconstruction from Point Clouds
… from delineated APC building instances, APC2Mesh, a framework which integrates 3D building point completion and reconstruction processes, is proposed. The developed point completion network uses dynamic edge convolution and self-attention mechanism operations to extracts both local and global …
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Thoughts on harmonic analysis on the sphere: spherical wavelet frames and kernels
… surface-value dependent inner product space on a triangular mesh and prove its equivalence to the combinatoric inner product.
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Geometric morphometrics for 3D dense surface correspondence: population comparisons of shoulder bone morphology
… measured from 3D surfaces (consisting of triangular meshes). However, these landmarks may not be sufficient to describe the complete shape. This project aimed to develop GM for analysis that consider all vertices in the triangular mesh as landmarks. The developed methods were applied to …
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Modeling and simulation for signal and power integrity of electronic packages
… of a new modeling method, the multilayer triangular element method (MTEM), for power/ground planes of a PDN. MTEM creates a surface mesh on each plane-pair using dual graphs; a non-uniform triangular mesh (Delaunay triangulation) and its orthogonal counterpart (Voronoi diagram), to which …
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Numerical Simulations of Interactions of Solid Particles and Deformable Gas Bubbles in Viscous Liquids
… />framework. A moving, unstructured, triangular mesh tracks the<br />deformation of the bubble and free surface with adaptive refinement.<br />In this dissertation, we study four problems. In the first three<br />problems the flow is assumed to be axisymmetric and two dimensional<br …
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Routing algorithms for electronic design automation
… a minimum hybrid-cost shortest path problem on triangular mesh (“hybrid” means that we need to consider both the length and the bending of the routing path). We show that by graph expansion, this minimum hybrid-cost shortest path problem can be solved by applying the conventional shortest path …
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Image Approximation using Triangulation
… eyes interpret. This thesis considers the use of triangular meshes for approximating intensity images. With the help of the wavelet-based analysis, triangular meshes can be efficiently constructed to approximate the image data. In this thesis, this study will focus on local image enhancement and …