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 10 of 10 for “"surface approximation"”.
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Multi-resolution surface approximation for animation
… with a hierarchical bicubic B-spline surface that is suitable for further manipulation and animation. Chord length parameterization is obtained using 2-D deformation technique. A full multigrid (FMG) numerical method is used to solve the surface approximation and the multi-resolution …
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Wavelet-Based Multiresolution Surface Approximation from Height Fields
… representation is to use a piecewise polygonal 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 …
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A robust variable order facet model for image data
The underlying piecewise continuous surface of a digital image can be estimated through robust statistical procedures. This thesis contains a systematic Monte Carlo study of M-estimation and LMS estimation for image surface approximation, an examination of the merits of postprocessing and tuning …
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Automated shape analysis and visualization of the human back.
… is to base the assessment on the shape of back surface. Though three-dimensional data acquisition methods exist, techniques to extract relevant information for clinical use have not been widely developed. Thi's thesis presentsthe content and progression of research into automated analysis and …
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How Does Vegetation Movement During Laser Scanning Affect Common Point Cloud-Derived Metrics? A Virtual Laser Scanning Study
… be improved by applying a moving least squares surface approximation filter, which reduces measurement noise and motion effects. This study demonstrates how virtual laser scanning can be used to systematically investigate variables that influence the laser scanning result. Furthermore, by …
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Numerical simulations of wings in unsteady flows
… The numerical results obtained from a lifting-surface approximation are also in close agreement with the experimental data for a wing as thick as 18%. The lift and moment coefficients are affected by the thickness of a wing in oscillation and this effect is more noticeable for the moment …
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Optical micro- and nanofibres: Higher mode generation and particle manipulation studies
… work on the impact of the curved nanofibre surface on the atomic-surface van der Waals interaction is also presented, showing a clear deviation of the potential from the commonly-used flat-surface approximation. Optical micro- and nanofibres are also useful tools for evanescent-field …
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Addition of Features to an Existing MDO Model for Containerships
… to draw usable conclusions. The linear response surface approximation was eliminated and the original stepwise discontinuous TEU capacity function is employed in the later examples. It was found that the minimum of the required fright rate occurred at the lower limits of length and beam on each …
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Data Driven Surrogate Based Optimization in the Problem Solving Environment WBCSim
… is by constructing computationally cheap(er) approximations of the expensive simulations, that mimic the behavior of the simulation model as closely as possible. This paper presents a data driven, surrogate based optimization algorithm that uses a trust region based sequential approximate …