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 20 of 30 for “"Complex-shape"”.
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Learning the dynamics of deformable objects and recursive boundary estimation using curve evolution techniques
… approach by applying sample-based methods to a complex shape space.
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Design procedures : a computational framework for parametric design and complex shapes in architecture
… early stages of design, it is common to generate shapes of complex nature that could only be produced by the combined forces of human imagination and computer power. However the more complex the shapes are, the more difficult it becomes to establish a discourse that embodies the geometrical and …
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Cognitive GPR for subsurface sensing based on edge computing and deep reinforcement learning
… acquire a global view of subsurface objects with complex shape configurations, 2D B-Scan image analysis is extended to 3D GPR data analysis termed “Scan Cloud.” A scan cloud-enabled cognitive GPR is studied based on an advanced deep reinforcement learning method called deep deterministic policy …
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Printing ferromagnetic domains in soft materials : mechanism, modeling, and applications
… of transforming between three-dimensional (3D) shapes have applications in areas as diverse as flexible electronics, soft robotics, and biomedicine. This thesis introduces a method of printing ferromagnetic domains in soft materials that yield fast transformation between complex 3D shapes via …
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Numerical modelling of the aluminium extrusion process
… of the product from an homogenised billet into a complex shape. In addition the properties of the extrudate are closely related to the processing parameters (temperature, stain rate, and material morphology). Since all the parameters vary throughout the ram stroke and throughout the billet the …
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Laboratory experiments on alluvial cover in mixed bedrock-alluvial meandering channels and on the formation and evolution of supraglacial meltwater meandering streams
… effect of bedrock and alluvium in a channel of complex shape, be better described and quantified so as to inform numerical models? 5. How do meltwater meandering channels form and evolve? 6. What are the characteristics of meltwater meandering channels and what is the degree of similarity …
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Augmented manual fabrication methods for 2D tool positioning and 3D sculpting
… such as precise 3D sensing, manipulation of complex shape data, and millimeter-scale actuation. This thesis presents two new augmented manual fabrication methods. The first is a method for helping a sculptor create an object that precisely matches the shape of a digital 3D model. In this …
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Genetic algorithm optimisation of load cell geometry by finite element analysis
… contact conditions and to load celis of more complex shape, a simple finite element (FE) program incorporating contact analysis, automatic meshing, and infinite elements was developed. The results from the program are shown to be in good agreement with those from the analytic solution, from …
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Investigating detonation fronts in small explosive charges using a wave shaper
… front from a diverging spherical wave to a more complex shape allows for substantial increases to the detonation velocity and pressure above the Chapman-Jouguet condition. Converging detonation fronts can detonate insensitive explosives or increase metal pushing power in explosively formed …
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HEAT TRANSFER IN SQUEEZE CASTING OF LIGHT ALLOYS
… MPa by using the simple cylindrical mold. A more complex shape casting mold with five different section thicknesses (2, 4, 8, 12 and 20 mm) was then developed. Wrought aluminum alloys 5083, 7075 and magnesium alloy AM60, AJ62 were squeeze casted under different applied pressures of 30, 60 and 90 …
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A Prediction of the Acoustical Output of a Golf Driver Head Using Finite Elements
… was one such factor was not included. Due to the complex shape of the driver head and the total number of elements involved, the numerical solution took upwards of 100 hours to finish. Adding the golf ball sound would greatly increase computational time and not contribute significantly to the …
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Physically Based Mesh-free Deformation Framework and Techniques for Computer Graphics
… Because no mesh is involved, deforming a complex shape is as straightforw'ard as deforming a simple one and the trade-off between efficiency and accuracy is easy to achieve by redistributing the points concerned. Experiments show that this method is fast and offers similar accuracy to the …
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Effect of Nanoparticle Shape on the Response of Broadband Metamaterial Absorbers in the Visible Spectrum
… of random and fractal gold islands of different shapes, sizes, and orientations. Such MIM structures are efficient absorbers of light and exhibit a broadband response that can cover the entire visible spectrum (400-750nm). Moreover, the top gold meta-surface layer requires no lithography and is …
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Automated Pattern Detection and Generalization of Building Groups
… large amount of map space and normally have complex shape and spatial distribution, which leads to that the generalization of buildings has long been an important and challenging task. For social, architectural and geographical reasons, the buildings were built with some special rules which …
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Diamond Schottky barrier diodes
… poor hole concentration at room temperature. The complex shape of the on-state characteristic exhibited by diamond M-i-P Schottky structures is thoroughly investigated by means of experimental results, numerical simulations and theoretical considerations. The fabrication of a ramp oxide …
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Shape formation by self-disassembly in programmable matter systems
… our long-standing goal of programmatic shape formation, we also develop a suite of provably-correct distributed algorithms that allow complex shape formation. The distributed duplication algorithm that we present allows the system to duplicate any passive object that is submerged in a …
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Finite element simulation of stress evolution in thermal barrier coating systems
… thermal mismatch of the material constituents, complex shape of the BC/TGO/TBC interface, redistribution of stresses via creep and plastic deformation and crack resistance. In this work, experimental data of thermo-mechanical properties of CMSX-4, MCrAlY (Bond Coat) and APS-TBC (partially …
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An Exploration into the Relationship between Knee Shape and Kinematics Before and After Total Knee Replacement
… its design and it is thought that its articular shape is the main driver of biomechanical behaviour. Although the shape of the bony knee is acknowledged to change with osteoarthritis, the specific relationship between shape changes and function is not well understood. Deep flexion, specifically …
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An Exploration into the Relationship between Knee Shape and Kinematics Before and After Total Knee Replacement
… its design and it is thought that its articular shape is the main driver of biomechanical behaviour. Although the shape of the bony knee is acknowledged to change with osteoarthritis, the specific relationship between shape changes and function is not well understood. Deep flexion, specifically …
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Development of first principles paramagnetic NMR methodologies to probe the complex local structural properties of Li-ion battery materials
… coordianted paramagnetic centres. In the case of complex paramagnetic solids such as cathode materials for (rechargeable) batteries, NMR represents an invaluable tool to provide insight into the structural and electronic properties of the systems, which are at the base of the electrochemical …
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