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 11 of 11 for “"Terrain surfaces"”.
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Improved Methods for Gridding, Stochastic Modeling, and Compact Characterization of Terrain Surfaces
Accurate terrain models provide the chassis designer with a powerful tool to make informed design decisions early in the design process. During this stage, engineers are challenged with predicting vehicle loads through modeling and simulation. The accuracy of these simulation results depends not …
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A Galerkin Approach to Define Measured Terrain Surfaces with Analytic Basis Vectors to Produce a Compact Representation
… time and money spent in the development process. Terrain is the principle source of vertical excitation to the vehicle and must be accurately represented in order to correctly predict the vehicle response in simulation. In this dissertation, non-deformable terrain surfaces are defined as a …
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Error Estimations in the Design of a Terrain Measurement System
Terrain surface measurement is an important tool in vehicle design work as well as pavement classification and health monitoring. �Non-deformable terrains are the primary excitation to vehicles traveling over it, and therefore it is important to be able to quantify these terrain surfaces. …
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Analysis of the impact of using GIS and 2.5D modelling in automating the determination of view factors for the purposes of CAMA modelling
… metre contour data is used to generate digital terrain models (DTM) in the TIN data structure and in the raster data structure. The two terrain surfaces are assessed for accuracy by using the Town Survey Marks (TSM) height data.
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Event Detection in the Terrain Surface
Event Detection is a process of identifying terrain flatness from which localized events such as potholes in the terrain surface can be found and is an important tool in pavement health monitoring and vehicle performance inspection. Repeated detection of terrain surfaces over an extended period of …
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Techniques for using 3D Terrain Surface Measurements for Vehicular Simulations
… is the development of techniques for using 3D terrain surface measurements for vehicular simulations. Contributions are made to vehicle model parameter identification, terrain filtering, and application-dependent interpolation methods for 3D terrain surfaces. Modeling and simulation are used to …
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Wavelet-based multiresolution data representations for scalable distributed GIS services
… (WTIN) format is developed to process general terrain surfaces based on the second generation wavelet theory. By designing a strategy to resample a terrain surface at subdivision points through the modified Butterfly scheme, we achieve the result: only one wavelet coefficient needs to be stored …
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Improving the Quality of Terrain Measurement
… and tire models has raised the requirements for terrain measurement capabilities. Inaccuracies that were once tolerable for measurement of general terrain roughness are no longer acceptable for these new applications. The techniques in this work seek to improve the quality of terrain measurement …
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Real-time transition texture synthesis for terrains.
… where differing material textures meet on a terrain surface presents a particularly unique set of challenges in the field of real-time rendering. Natural landscapes are inherently irregular and composed of complex interactions between many different material types of effectively endless …
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ENVIRONMENTAL GEOMETRY IN FISHES AND TORTOISES: EFFECT OF LANDMARKS, BEHAVIOURAL METHODOLOGIES, AND SENSORY CHANNELS ON SPATIAL REORIENTATION
… reoriented similarly through transparent surfaces, which defined a distinctive global shape, supporting spatial reorientation under undefined situations (e.g., seek out food within a visually lacking and unenriched environment) as a shared skill among teleosts, despite ecological …
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Object reconstruction using close-range all-round digital photogrammetry for applications in industry
… is well-established as a tool for mapping simple terrain surfaces and for acquiring accurate 3-D point data. The complexities of all-round photogrammetry make many of the standard photogrammetric methods all but redundant. The work presented in this thesis was aimed at the development of a …