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 570 for “"High Order"”.
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Mining Complex High-Order Datasets
… or when features naturally take the form of higher-order multilinear structures. Such datasets particularly abound in functional medical imaging modalities, such as fMRI, where accurate integration of both spatial and temporal information is critical. Although necessary to take full advantage …
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Unsteady aerodynamics using high-order methods
… of unsteady fluid motions at low Mach numbers. High order numerical schemes are employed to this effect. The Detached Eddy Simulation (DES) method is considered for the turbulence modelling part. At the start of this project, the combination of high order Computational Aeroacoustics (CAA) …
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Robust adaptive high-order RANS methods
… (CFD) tools are often accompanied by intractably high computational expenses and are significantly hindered by the lack of automation. In particular, the generation of a suitable mesh for a given flow problem often requires significant amounts of human input. This process however encounters …
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Efficient High Order Ensemble for Fluid Flow
… approach and are demonstrated to be second-order accurate and unconditionally stable with respect to the system energy through comprehensive stability analyses and error tests. Two algorithms make use of Artificial Compressibility (AC) to update pressure and a solenoidal constraint for the …
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A pFFT accelerated high order panel method
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2003.
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A pFFT accelerated high order panel method
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2003.
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High-order numerical methods for layer potential evaluation
… evaluation of layer potentials, by providing a high-order and kernel/dimension independent quadrature scheme that is also acceleration-compatible, i.e., able to be integrated with a fast summation scheme to reduce the cost of $O(N^2)$ pairwise interactions to $O(N)$. The focus of the first part …
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High order stochastic transport and Lagrangian data assimilation
… In the first part of this thesis, we develop high-order numerical schemes for the DO equations that ensure efficiency, accuracy, stability, and consistency between the Monte Carlo (MC) and DO solutions. We discuss the numerical challenges in applying the DO equations to the unsteady stochastic …
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Visualization for high-order discontinuous Galerkin CFD results
… error introduced in the visualization of higher-order DG solutions with traditional tools. Most visualization techniques work by using the solution at the mesh vertices and linearly interpolating to color the interior of the element. For higher-order solutions (where the visualization mesh …
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High order hybrid discontinuous Galerkin regional ocean modelling
… led us to develop new variable resolution, higher-order and non-hydrostatic ocean modeling schemes. Specifically, we derived, developed and applied new numerical schemes based on the novel hybrid discontinuous Galerkin (HDG) method in combination with projection methods. The new numerical …
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Efficient Machine Learning with High Order and Combinatorial Structures
… In the first part, we develop a toolbox of high order potentials (HOPs) that are useful for defining interactions and constraints that would be inefficient or otherwise difficult to use within the standard graphical modeling framework. For each potential, we develop associated algorithms so …
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From efficient high-order methods to scientific machine learning.
… on implicit Runge-Kutta methods which possess high-order accuracy and important stability properties. Implementation difficulties and the high expense of solving the coupled algebraic system at each time step are frequently cited as impediments. We present Irksome, a high-level library for …
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High Order Finite Element Solution of Elastohydrodynamic Lubrication Problems
In this thesis, a high-order finite element scheme, based upon the Discontinuous Galerkin (DG) method, is introduced to solve one- and two-dimensional Elastohydrodynamic Lubrication (EHL) problems (line contact and point contact). This thesis provides an introduction to elastohydrodynamic …
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High Order Fluctuation Splitting Schemes for Hyperbolic Conservation Laws
… analysis and the verification of a new form of higher than second order fluctuation splitting discretisation for the solution of steady conservation laws on unstructured meshes. This is an alternative approach to the two existing higher than second order fluctuation splitting schemes, which use …
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High Order Finite Elements for Lagrangian Computational Fluid Dynamics
… FEM framework allows for separate arbitrarily high order representation of kinematic and thermodynamic variables. An accompanying hydrodynamics code written in Matlab is presented as a test-bed to experiment with various basis function choices. A wide range of basis function pairs are …
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Extreme Ultraviolet Polarimetry with Laser-Generated High-Order Harmonics
… (EUV) polarimeter, which employs laser-generated high-order harmonics as the light source. This relatively high-flux directional EUV source has available wavelengths between 8 nm and 62 nm and easily rotatable linear polarization. The polarimeter will aid researchers at BYU in characterizing EUV …
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From efficient high-order methods to scientific machine learning.
… on implicit Runge-Kutta methods which possess high-order accuracy and important stability properties. Implementation difficulties and the high expense of solving the coupled algebraic system at each time step are frequently cited as impediments. We present Irksome, a high-level library for …
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Curve characterization with high-order tensor singular value decomposition
Made available in DSpace on 2016-07-07T19:58:19Z (GMT). No. of bitstreams: 2 CAI-THESIS-2016.pdf: 2599852 bytes, checksum: c5150b52d2e0c26a7abcb48c71c76bf3 (MD5) LICENSE.txt: 4206 bytes, checksum: cd03b4878a87f39bc09a17838bd5b8de (MD5) Previous issue date: 2016-04-28
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Quantum Electrodynamic Theory of Optical High-Order Harmonic Generation
Based on the theoretical analysis, harmonies with higher orders are predicted to be generated with higher efficiency, if a means is devised to utilize more energetic photoelectrons to the harmonic generation process.
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A Method of Adaptive Control for High-Order Systems
Made available in DSpace on 2014-12-04T21:03:18Z (GMT). No. of bitstreams: 1 6100149.pdf: 2350165 bytes, checksum: 3614bb2d53efca8c445bca9ef6d619cc (MD5) Previous issue date: 1960
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