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 17 of 17 for “"Fast Methods"”.
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Fast methods for inverse wave scattering problems
… and semiconductor quality control. The proposed methods are (a) a spectrally convergent Nyström method for periodic structures in 2-D; (b) a fast Jacobian approximation method accompanying a Nyström method; (c) a fast and accurate method for evaluating the potential integrals in the 3-D …
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Fast methods for full-wave electromagnetic solvers in MRI
… recently demonstrated that the combination of fast low-resolution tissue mapping and fast voxel-based field simulation can be used to perform a rapid patient-specific MR safety check. However, the field simulation still required several minutes, making it too slow to perform the dozens of …
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Fast methods for extraction and sparsification of substrate coupling
… simulation tools. Past work has concentrated on fast substrate solvers that are applied once per contact to get the dense conductance matrix G. We develop a method of using any underlying substrate solver a near-constant number of times to obtain a sparse approximate representation G …
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Fast methods for fitting log-Gaussian Cox process models in ecology.
Log-Gaussian Cox processes (LGCPs) offer a framework for regression-style modelling of point patterns that can accommodate latent effects. These latent effects can be used to account for missing predictors or other sources of clustering that could not be explained by a Poisson process. Such models …
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Fast methods for scheduling with applications to real-time systems and large-scale, robotic manufacturing of aerospace structures
… decomposition and distributed techniques. These methods work well for domains such as UAV scheduling when the temporospatial constraints can be decoupled or when low network bandwidth makes inter-agent communication difficult. However, the advantages of these methods are mitigated in the factory …
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Combining Data-driven and Theory-guided Models in Ensemble Data Assimilation
… and can help pave the way for robust and fast methods.
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Fast Algorithms for Tomography
… tomographic data that are significantly faster and more accurate than existing fast methods. First, a new fast reconstruction algorithm based on a hierarchical decomposition of the back-projection operation is presented. Numerical simulations suggest that this new algorithm provides …
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Multilevel Summation for the Fast Evaluation of Forces for the Simulation of Biomolecules
… to be superior to other commonly used fast methods for electrostatics, while providing comparable accuracy. The method is also shown to produce stable dynamics for cheaper, lower accuracy approximation.
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Early Vision Optimization: Parametric Models, Parallelization and Curvature
… one of the key factors for the success of recent methods is that they seek to compute globally optimal solutions. This thesis is concerned with improving the efficiency and extending the applicability of the current state of the art. This is achieved by introducing new methods of computing …
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Methods of fast Fourier transform in diffraction problems of elastic and acoustic waves with applications to crack mechanics
… is connected with a development of modern fast computational methods applied to problems in wave dynamics, acoustics, and boundary-value problems of mechanics with mixed boundary conditions. This includes: 1) Development of fast methods for integral equations with convolution kernels …
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Computational study of graphene nanopore sensor for DNA sensing
Inexpensive and fast methods to sequence the genome of individuals using nanopore technology can lead to tremendous advancement in the eld of modern medicine. The thickness of the membranes employed in nanopore-based sensors presents a fundamental limitation to the physical dimension, of the …
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Combinatorial Treatments and Technologies for Safe and Effective Targeting of Malignant Gliomas Using High-Frequency Irreversible Electroporation
… real-time Fourier Analysis SpecTroscopy (FAST) to accurately model rises in temperature during treatment; and (5) modifying real-time FAST methods to determine treatment endpoints for safe and effective ablation volumes.
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Galerkin boundary element methods with multiwavelets
… with a preconditioner. We are interested in fast methods such aswavelets/mutiwavelets, that reduce the computational cost to O(N logp N) with p a smallpositive integer. Wavelets are attractive for the numerical solution of integral equations becausetheir vanishing moments property leads to …
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A hitchhiker’s guide to efficient non-projective dependency parsing
… and expectations. We further introduce two fast methods for sampling trees from graph theory, and extend them to satisfy a common constraint in dependency parsing schemes that only allows one edge to emanate from the root. Additionally, we contribute the first sampling-without-replacement …
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The Unified-FFT Method for Fast Solution of Integral Equations as Applied to Shielded-Domain Electromagnetics
… in the realm of speed-enhanced EM solvers, these fast solvers generally achieve their results through methods that introduce additional error components by way of geometric approximations, sparse-matrix approximations, multilevel decomposition of interactions, and more. This work introduces the …
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Electrostatic micro actuators for mirror and other applications
… through some medium or through free space. The fast paced, competitive research and development efforts widely being undertaken, both in academia and industry, are demanding simple, fast methods for the design of quasi-static Mirror systems, with a large, stable, analog range of operation. In …
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Perfil descritivo otimizado: número de julgadores, delineamentos e validação
O Perfil Descritivo Otimizado (PDO) é uma nova metodologia de descrição sensorial que foi proposta recentemente com o objetivo de reduzir o tempo do teste sensorial. No PDO a avaliação dos atributos sensoriais é realizada de forma quantitativa por meio da avaliação de um painel semi-treinado. A …