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 43 for “"Geometric models"”.
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Interactive tolerance allocation in geometric models
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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The goodness-of-fit tests for geometric models
We propose two types of goodness-of-fit tests for geometric distribution and for a bivariate geometric distribution called BGD(B&D), based on their probability generating function (PGF). The first type is a special-case application of the general testing procedure for discrete distributions …
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Drawing interfaces : building geometric models with hand-drawn sketches
Architects work on drawings and models, not buildings. Today, in many architectural practices, drawings and models are produced in digital format using Computer-aided Design (CAD) tools. Unquestionably, digital media have changed the way in which many architects perform their day to day activities. …
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Learning Statistical and Geometric Models from Microarray Gene Expression Data
… of the noise-free model. Based on relevant geometric concepts, convex analysis and optimization, gene clustering, and model stability analysis, we develop a robust blind source separation method that fits the model to the gene expression data and subsequently identify the underlying …
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Automatic generation of interference-free geometric models of spatial mechanisms
This work presents methods used to obtain geometric models of spatial mechanisms which can be realized in hardware. Each model is created automatically from the kinematic description of a mechanism. The models are tested for interference between joints and links. Models with interfering links or …
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Modeling with bivariate geometric distributions
… the survival time of each component following geometric or mixture geometric distribution can be classified into this category. Examples of such systems include twin engines of an airplane and the paired organs in a human body. It was found that such a system, using conditional arguments, can …
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Accelerated volumetric reconstruction from uncalibrated camera views
… graphics starts traditionally with input geometric models and produces image sequences. Computer vision starts with input image sequences and produces geometric models. In the last few years, there has been a convergence of research to bridge the gap between the two fields. This …
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Structure Based, Two-dimensional, Anisotropic, Transient Heat Conduction model for Wood
… the parameters used in heat and mass transfer models has been demonstrated by many research studies. Thermal conductivity values used in previous models are usually empirical and fluctuate. Theoretical analysis and estimations of wood thermal conductivities in the radial and tangential …
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Molecule surface triangulation from alpha shapes
… cast as questions of molecular geometry. Common geometric models for proteins and other molecules are the space filling diagram, the solvent accessible surface and the molecular surface. In this thesis we present a new approach to triangulating the surface of a molecule under the three models, …
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Differential equation-based shape interpolation for surface blending and facial blendshapes.
… shape interpolation has been widely applied in geometric modelling and computer animation. It has the advantages of physics-based, good realism, easy obtaining of high- order continuity, strong ability in describing complicated shapes, and small data of geometric models. Among various …
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Certifiable Outlier-Robust Geometric Perception
Geometric perception is the task of estimating geometric models (e.g., object pose and 3D structure) from sensor measurements (e.g., LiDAR scans, neural network detections) and priors (e.g., object 3D models). Geometric perception is a fundamental building block for robotics applications ranging …
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Heliocentric architecture : materializing solar cadences
… tools which provide precise numerical and geometric models of solar rhythms. This thesis applies the quantitative control of computational methods to the creation of atmospherically daylit architecture, making possible spaces whose form, tuned to the rhythms of changing daylight, reveals …
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Concepts and Schemas: Representational Format for Structured Knowledge
… processing. We start by discussing classical geometric models of knowledge representation, which view concepts as regions in abstract, multidimensional spaces organised by metric principles. These models have been supported by recent neuroimaging studies that suggest shared neural …
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Reliable Robotic Perception: From Outlier-Robust Estimation to Task-Aware Runtime Monitoring
… The first part of the thesis focuses on geometric perception, which is the task of estimating geometric models (e.g., poses) from sensor measurements (e.g., LiDAR scans). Geometric perception is plagued by the presence of outliers —spurious measurements— that compromise the accuracy of …
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Probabilistic geometric grammars for object recognition
… inherent to many types of objects. The framework models the 3) geometric characteristics of object parts using multivariate conditional Gaussians over dimensions, position, and rotation. I present algorithms for learning geometric models and rule probabilities given parsed 3D examples and a fixed …
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Perceived features and similarity of images: An investigation into their relationships and a test of Tversky's contrast model.
… and texture, use similarity measures based on geometric models of similarity. However, most human similarity judgment data violate the metric axioms of these models. Tversky's (1977) contrast model, which defines similarity as a feature contrast task and equates the degree of similarity of two …
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Colour videos with depth : acquisition, processing and evaluation
… in computer vision and computer graphics are geometric models, which provide a wealth of information about represented objects, such as depth and surface normals. Videos do not contain this information, but only provide per-pixel colour information. In this dissertation, I hence investigate a …
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Focus+Context via Snaking Paths
… cylindrical structures in segmented volumetric models to match the curve and provide preliminary geometric models as templates for artists to build upon. Structures are discovered using our constrained volumetric sculpting method that enables removal of occluding material while leaving them …
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Modeling joint patterns using combinations of mechanical and probabilistic concepts
… approaches have been used to model them. Geometric models, which use probabilistic processes usually not or only indirectly related to mechanics, are often used for this purpose. Mechanics-based models, on the other hand, can only describe simpler fracture patterns. This research will …
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