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 97 for “"Surface models"”.
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Polynomial Surface Models for Computer Vision
… extensions to our approach to make more accurate models and expand the set of potential applications, and we discuss a number of related problems yet to be solved.
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A new estimation procedure for response surface models
Several attempts have been made to find an estimator of a response which will have a smaller integrated mean square error than existing procedures. In this work another such attempt is made by introducing a shrinkage procedure. Suppose the true functional relationship between a response η and ρ …
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Extracting dimensional geometric parameters from B-spline surface models
… the geometry definition to be in the form of surface models. This dissertation presents the necessity and scope of creating and implementing methodologies to obtain dimensional geometric parameters from the surface description of an object. Since the study of geometric modeling and parametric …
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Jacobian-based control of soft robots for manipulation using implicit surface models
… robot hands with relatively simple dynamical models. Specifically, we demonstrate a very simple model of a 2D soft manipulator that uses pulleys and cables to model deformable surfaces. This model captures much of the qualitative behavior of soft membranes, while also proving amenable to …
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Quantifying the Sensitivity of Land-Surface Models to Hydrodynamic Stress Limitations on Transpiration
… heat flux and carbon uptake rates. Current land-surface models couple stomata conductance and soil moisture through empirical relationships. This approach does not take advantage of recent advances in our understanding of water flow and storage in trees or of tree and canopy structure. The lack …
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Segmented images and surface models made of serially-sectioned images of cadaver head
… purpose is to present segmented images and surface models (three dimensional images) based on the serially-sectioned images, which are helpful in learning head anatomy. The other purpose is to present technique of erasing horizontal lines in coronal and sagittal images, and that of …
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A multi-criteria evaluation of land-surface models and application to semi-arid regions
… errors and that several parameters in the models are insensitive regardless of the input data (i.e., vegetation type). To better understand SVATS performance in semi-arid regions, and to evaluate the various impacts of data on the parameter estimation problem, an intensive calibration and …
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Three-Dimentional Surface Models of the Detailed Lumbar Structures Made from the Visible Korean
… Ⅱ.2 Filling of outlines with color Ⅱ.3 Surface reconstruction of outlined structures Ⅱ.4 Assembling and refining of surface models Ⅱ.5 Picturing of not outlined structures Ⅲ. RESULT Ⅳ. DISCUSSION Ⅴ. CONCLUSION REFERENCES 국문요약"
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Surface Models of the Gastrointestinal Tract and Neighboring Structures Made from the Visible Korean Human
Surface models of the gastrointestinal (GI) tract and neighboring abdominal structures can be opened and rotated in a real time, which is helpful to understanding anatomy of digestive system. However, we could not find objective surface models made from the serially sectioned images. In order to …
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Force Field Parameters and Atomistic Surface Models forHydroxyapatite and Analysis of Biomolecular Adsorption at Aqueous Interfaces
… polarity, interfacial interactions, as well as surface chemistry. We present a new force field for HAP which is fully integrated into the polymer consistent force field (PCFF), CHARMM, and AMBER. In addition, models of hydrated HAP surfaces are critical under physiological conditions and have …
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Sectioned images and surface models of a cadaver for understanding the deep circumflex iliac artery flap
… from sectioned images and stereoscopic anatomic models using Visible Korean, for the benefit of medical education and clinical training in the field of oromandibular reconstructive surgery. Serially sectioned images of the pelvic area were obtained from a cadaver. Outlines of significant …
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Analysis of Viewshed Accuracy with Variable Resolution LIDAR Digital Surface Models and Photogrammetrically-Derived Digital Elevation Models
… generated using "bare-earth" Digital Elevation Models (DEMs) derived from the process of photogrammetry. More detailed models, known as Digital Surface Models (DSMs), are often generated using Light Detection and Ranging (LIDAR) which uses an airborne laser to scan the terrain. In addition to …
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Real-Time Realization of Lidar – Based Digital Surface Models for Airborne Safe Landing Zone Identification in Challenging Environments
… over the last two decades for generating digital surface models (DSMs) in real-time. One of the important applications for real-time DSMs is aircraft landing, especially in a degraded visual environment. In such a challenging environment, no clear visual conditions exist, which can potentially …
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Trading water for carbon in a changing climate: can optimality theory improve the predictability of land surface models?
… future risk remains a challenge because climate models demonstrate systematic errors in predicting plant function when resources become limiting (e.g., water). To improve predictions of ecosystem resilience, major model weaknesses in the formulation of plant responses to climatic stress must be …
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Variable-Complexity Approximations for Aerodynamic Parameters in Hsct Optimization
… and performance design is presented. Response surface model methodology is used to fit quadratic polynomials to data gathered from a series of numerical analyses of different HSCT designs. Several techniques are employed to minimize the number of required analyses and to maintain accuracy. …
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Enhanced Anisotropic Bounding Surface Model: Implementation and Simulation of Excavation in Soft Cohesive Soils
… application of an enhanced anisotropic bounding surface model with non-associative flow rule, based on the anisotropic critical state theory and bounding surface plasticity. The model has exhibited a great potential to realistically simulate the mechanical behavior of cohesive soils, in …
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Effects of stabilizer bars on road vehicle ride quality
… bars. In this study vehicle suspension and road surface models are developed to investigate the effects of such stabilizer bars on ride quality. The purpose of the research is to determine the need for further studies in the area of active roll stabilizer systems. Two dynamic vehicle models are …
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The Hydraulic Spline: Comparisons of Existing Surface Modeling Techniques and Development of a Spline-Based Approach for Hydrographic and Topographic Surface Modeling
Creation of accurate and coherent surface models is vital to the effective planning and construction of flood control and hurricane protection projects. Typically, topographic surface models are synthesized from Delaunay triangulations or interpolated raster grids. Although these techniques are …
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Response Surface Method for Time-Variant Reliability Analysis
… in this study. The method uses response surface methodology and the fast integration scheme developed by Wen and Chen (1987). The mean and coefficient of variation of the maximum response of the structure are modeled by second order polynomials fitted using central composite designs …
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