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.
Results
Showing 1 to 20 of 158 for “"3D structure"”.
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Inference of 3D structure of diploid chromosomes
… we study the problem of reconstructing the 3D organization of the genome from whole-genome contact frequencies. A standard approach is to transform the contact frequencies into noisy distance measurements and then apply semidefinite programming (SDP) formulations to obtain the 3D …
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The 3D Structure of A Salt Marsh Island
… of platform inundation. However, topographic structure of the intertidal salt marsh remains poorly quantified. In this study, I used a survey grade Digital Elevation Model to accurately quantify the spatial variability of topographic structures including the 1D, 2D, and 3D geometry of 23 tidal …
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Dynamic reconstruction and integration of 3D structure information
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Brain and Cognitive Sciences, 1993.
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Wide-area egomotion from omnidirectional video and coarse 3D structure
… environments. Given a coarse model of the structure (walls, floors, ceilings, doors and windows) and a video sequence, the system computes the camera pose (translation and rotation) in model coordinates with an accuracy of a few centimeters in translation and a few degrees in rotation. The …
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UNRAVELING THE NUCLEON 3D STRUCTURE FROM EXPERIMENT, LATTICE, AND GLOBAL ANALYSIS
In this work, we study the nucleon spin structures and derive a new twist-3 partonic sum rule for the transverse spin of the proton, which involves the well-known quark spin structure function $g_T(x)$, the less-studied but known transverse gluon polarization density $\Delta G_T(x)$, and quark and …
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A statistical image-based shape model for visual hull reconstruction and 3D structure inference
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
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Gate-Oxide-Short Defect Analysis and Fault Modeling Based on FinFET's 3D Structure
… process due to its three-dimensional structure and reduced critical dimensions have caused new challenges in achieving reliable device testing. With the emergence of new types of defects and dominance of others, accurate modeling of the defects and generation of reliable fault models …
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Integrated analysis of relationships between 3D-structure, leaf photosynthesis, and branch transpiration of mature Fagus sylvatica and Quercus petraea trees in a mixed forest stand
Identifying the relevance of forest structure for stand photosynthesis and transpiration is one of the remaining challenges in plant physiological ecology. This thesis uses the historically new chances for the description of 3D-complexity of beech and oak forests that come along with the rapid …
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Structure and camera calibration from active correspondence of lines and intersection points
… representation of the three dimensional structure of a scene. In this dissertation we study the problem of determining the 3D structure of a scene given images of it from various views. We built Biclops, a two camera directed vision system. Each camera is mounted on a Pan-Tilt unit which …
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Methods to program and to probe RNA tertiary structure with nucleic acid origami
Biological structure determination has revolutionized mechanistic understandings, nanotechnology, and drug design. Despite advances in structural determination technologies, from nuclear magnetic resonance to cryo-electron microscopy (cryo-EM), one class of biomolecules has resisted 3D structure …
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Structure and dynamics of soluble guanylyl cyclase
… synthetic compound such as YC-l. Recently, the 3D structure of adenylyl cyclase (AC), which is a homologue of sGC, was determined. Using AC as template and homology modeling, the 3D structure of sGC is predicted. Prior experimental work has suggested two binding modes of YC- 1. In the current …
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Bioinformatic studies of small disulphide-rich proteins (SDPs)
… Disulphide bridges play crucial roles in the 3D structure, function and evolution of SDPs. The roles and patterns of disulphide bridges in SDPs were investigated using bioinformatic approaches. The systematic analyses suggested that cysteine signature can facilitate the detection of distantly …
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Learning viewer-centered projections for 3D shape completion
… is to determine the effectiveness of different 3D shape representations in learning to generate volumetric shapes using deep neural networks. We propose to automatically reconstruct a 3D model from a single-view image of an object by synthesizing multiple depth images and inferring the volume …
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Nonparametric directional perception
… and augmented reality headsets, rely on dense 3D sensing technology such as RGB-D cameras and LiDAR. scanners. Due to the structural simplicity of man-made environments, understanding and leveraging not only the 3D data but also the local orientations of the constituent surfaces, has huge …
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Growing machines
… string, can generate any three dimensional structure where the primitive pixel (or voxel) is a rhombic hexahedron. This construction also suggests a concept of 3D completeness for assembly, somewhat analogous to the concept of Turing completeness in computation. In combination, these pieces …
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Language-Guided 4D Object Reconstruction from Videos
… as it requires both detailed object 3D structure and accurate motion within a complex 3D environment. This thesis proposes a framework that converts object-centric monocular videos into 4D representations. The two primary challenges we aim to tackle are: 1) key object extraction from …
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Computational 3D and reflectivity imaging with high photon efficiency
Imaging the 3D structure and reflectivity of a scene can be done using photon-counting detectors. Traditional imagers of this type typically require hundreds of detected photons per pixel for accurate 3D and reflectivity imaging. Under low light-level conditions, in which the mean photon count is …
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The assessment of biomechanical modelling and PET/MR imaging in coronary atherosclerosis
… of mechanical parameters, in particular, plaque structure stress (PSS). The hypothesis is that the 3D structure only finite element analysis (FEA) can accurately predict the PSS with good time efficiency, and bending is an important factor in coronary biomechanical analysis. Mechanical parameters …
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From Block Copolymers to Crosslinked Networks: Anionic Polymerization Affords Functional Macromolecules for Advanced Technologies
… mechanical performance, ion conductivity, and 3D structure in order to address these globally challenged technologies. Achieving tailored chemical compositions with high degrees of phase separation for optimizing conductivity and water adsorption remains a constant synthetic challenge and …
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