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 7 of 7 for “"Discrete Fourier Transforms"”.
-
Six degrees of freedom estimation using monocular vision and moiré patterns
… the target utilizing geometry and 4 single-point discrete Fourier transforms (DFTs) on the moire patterns. Manual and autonomous movement tests are conducted to determine the accuracy of the system relative to ground truth locations obtained through an external indoor positioning system. Position …
-
Effect of ground motion frequency on non-structural seismic damage
… at San Francisco is presented. By computing Discrete Fourier Transforms, time history seismic data is transformed from time domain to frequency domain. We apply structural response analysis on a representative residential/office/mixed-use building to evaluate seismic performance. We scale …
-
High performance sparse Fast Fourier Transform using OpenACC
The Sparse Fast Fourier Transform (sFFT) is a recent algorithm developed by Hassanieh et al. at MIT for Discrete Fourier Transforms on signals with a sparse frequency domain. A reference implementation of the algorithm exists and proves that the sFFT can be faster than modern FFT libraries for …
-
Improving Image Quality in Holographic Projections through Novel Iterative Algorithmic Solutions
… of these algorithms the iterative use of discrete Fourier transforms (DFTs) and fast Fourier transforms (FFTs) requires significant processing power and is the bulk of the overall algorithmic run time. The final analysis of this thesis considers reducing this run time further by …
-
Investigation of ship target recognition using neural networks in conjunction with the Fourier Mellin transform
… of using neural networks in conjunction with the Fourier Modified Direct Mellin Transform (FMDMT) for the recognition of ship targets. The FMDMT is a modification of the Direct Mellin Transform for digital implementations, and is applied to the magnitudes of the Discrete Fourier Transforms (DFT) …
-
Novel Rheometric Techniques and Constitutive Models for Linear and Nonlinear Rheology: Applications to Polymeric Solutions and Colloidal Gels
… Conventional oscillatory techniques employ discrete Fourier transforms, which inherently assume the time signal to be time-translation invariant. This assumption results in systematic errors for mutating materials and there is also a need to develop novel rheometric techniques that can …
-
Resistive Companion Dynamic Phasor Networks and Phasor to Time Domain Network Coupling
… sources, modified nodal analysis (MNA), and a discrete Fourier transform (DFT) phasor estimation. A coupling device using this technique is implemented in Virtual Test Bed (VTB). The accuracy and stability of the method is verified with two test systems, including a system consisting of a …