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 51 for “"Cross-correlations"”.
-
Cross-correlations in medical data: theory, algorithms, and applications in disease analytics
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms
-
An analysis of zonal mean atmospheric angular momentum and high cloud cover : periodicities, time-latitude structure, and cross correlations
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmosphere and Planetary Sciences, 1987.
-
Fast and Scalable Architectures and Algorithms for the Computation of the Forward and Inverse Discrete Periodic Radon Transform with Applications to 2D Convolutions and Cross-Correlations
… in the computation of fast convolutions and cross-correlations for large and non-separable kernels. For this purpose, I introduce fast algorithms and scalable architectures to compute 2-D Linear convolutions/cross-correlations using the convolution property of the DPRT and fixed point …
-
A fast optical imaging study of frontoparietal preparatory dynamics in response-mode switching
… response modality. We employed lagged cross-correlations to characterize the dynamic connectivity of preparatory processes. Our results confirmed coupling of frontal and parietal cortices, and the trial-dependent relationship of the right frontal cortex with response preparation areas. …
-
Prospects for Quantum Equivariant Neural Networks
… and geometric deep learning. Convolutions and cross-correlations are examples of functions which are equivariant to the actions of a group. We present efficient quantum algorithms for performing linear finite-group convolutions and cross-correlations on data stored as quantum states. Potential …
-
Velocity analysis in the presence of uncertainty
… the reflection data. However, it is known that cross-correlations of neighboring seismic traces are stable against these perturbations, under some circumstances. The main theoretical achievement of this thesis, presented in Chapter 3, is to extend this stability result to laterally homogeneous …
-
Measurements of entropy-layer instabilities over cone-ogive-cylinders at Mach 6
… approaches the model further upstream. ^ Cross-correlations between the surface transducer and hot-wire anemometry measurements confirm that the same instability is being measured at both locations. Cross-correlations between axially-displaced surface sensors were used to calculate an …
-
Reconstructing the Sky with CMB Lensing methods
… and future high significance CMB lensing-galaxy cross-correlations will soon precisely probe the growth of structure and provide powerful tests for parameter tensions, non-Gaussianity, neutrino mass, and modifications to Λ−CDM and gravity. However, such cross-correlations are sensitive to CMB …
-
Klasbesoek as middel tot personeelontwikkeling as taak van die hoof in die primêre skool
… statistical technique. Frequency analysis and cross-correlations are reviewed. Cross-correlations were done with regard to the age of the headmasters as well as their years of experience as headmasters. By means of the empirical research, certain deficiencies were exposed regarding class …
-
Efficient Algorithms for Data Analytics in Geophysical Imaging
… utilized techniques in geophysical imaging: cross-correlations, and multichannel analysis of surface waves (MASW). Our cross-correlation algorithms operate directly in the wavelet domain on compressed data without requiring a reconstruction of the original signal, reducing memory costs and …
-
Multivariate Correlations: Balance Operators and Variable Localization in Ensemble Data Assimilation
… ensemble data assimilation schemes to eliminate correlations that are contaminated by sampling error. This method is frequently necessary within numerical weather prediction (NWP) applications due to the computational constraints present, limiting the number of ensemble members to a size much …
-
Cognitive flexibility and fronto-parietal control dynamics in aging
… frontal cortex predicted switch costs. Using cross-correlations to examine the flow of activity in a switching task, I found that left middle frontal gyrus activity preceded up-regulation of task-relevant lateralized processes in frontal regions. In addition to highlighting the flexible …
-
Spatio-Temporal Analysis of Observed Soil Moisture from Nebraska
… interpolations, time-series analysis, and cross-correlations to better understand the variations of soil moisture in the Northern Great Plains. Spatial interpolation grids were created for May through October of 2005, after the data were grouped into datasets of weekly, biweekly, and …
-
Measurements in the bimodal region of a wing-body junction flow with a rapidly-scanning two-velocity-component laser-Doppler velocimeter
… measured in previous studies at this facility. Cross-correlations between the velocity and the surface pressure fluctuations were obtained. Large correlations were found between the u fluctuations (x/t= -0.15, -0.25, and -0.30) near the wall, y/t < 0.05, and the surface pressure fluctuations. …
-
Localization of acoustic transients in shallow water environments
… received signal. The position of the maximum cross correlations reveals an estimate of source position. Using model to model correlation, this techniques successfully localized acoustic sources in both Monterey Bay and Barents Sea scenarios.
-
Team Cognition in Group Interventions: The Relation Between Co-Leaders' Shared Mental Models of the Group and Group Climate
… co-leaders of a group view their group). Cross correlations and growth curve analyses of the match and group climate data showed an increase in match of co-leaders' mental models across sessions, and that match in co-leader mental models was related to group climate.
-
Spectral Properties of Magnetic Edge States
… semiclassically. We find strong, non-trivial cross-correlations between the interior and exterior spectra. These correlations are based on a duality of the corresponding classical dynamics. Our analytical results are confirmed by extensive numerical studies.
-
Phase-sensitive light : coherence theory and applications to optical imaging
… imagers are due to phase-sensitive cross correlations, and hence are obtainable with classical phase-sensitive sources.
-
ACCELERATED NOISE INTERFEROMETRY-BASED PASSIVE ACOUSTIC CHARACTERIZATION OF THE LITTORAL OCEAN
… acoustic Green's functions are retrieved from cross-correlations of diffuse noise that is measured concurrently by spatially separated hydrophones. Continuous, multi-day noise-averaging periods were employed in the past to capture noise from numerous noise sources. Long averages achieved …
Page 1 of 3