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 59 for “"Temporal correlation"”.
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Spatio-Temporal Correlation in the Performance of Cache-Enabled Cellular Networks
… networks should incorporate dependencies or correlations in space and time, i.e., study how the network performance varies spatially and temporally while having prior information about the performance at previous locations and time slots. This spatio-temporal correlation in wireless networks …
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Experimental verification and development of structural identification techniques on a grid
… space environment. To this end, we consider the Temporal Correlation Method and the Eigensystem Realization Algorithm. The algorithms are implemented on the Astronautics Laboratory Grid structure, and the results of the algorithms are compared in the presence of damping, noise, and residual …
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Combining measurements with deterministic model outputs: predicting ground-level ozone
… random effects being spatially correlated) with temporally and spatially correlated residuals. We assume the spatial and temporal correlation are separable and use an AR process to model the temporal correlation. We also develop a multivariate version of this model. Both the melding model and …
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Mapping inter-subject and inter-regional brain connectivity during free viewing of novel natural scenes
… exhibited by all six subjects, and corresponding temporal correlation values between subjects from those regions. In this study, a controlled experiment was conducted in which all the subjects viewed a movie clip from the 2005 thriller Redeye for the first time during the tMRI scan. Spatial and …
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Compressive sensing of images and video: towards low-complexity, real-time operation
… for transmission, and the exploitation of temporal correlation between frames to improve performance. With respect to the compression of independent video frames, this work proposes two novel classes of techniques: Adaptive Block Compressive Sensing (ABCS) and re-purposed single image super …
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Assessment of control and performance of biomedical systems
… presenting a statistical challenge due to high temporal correlation. This research investigates the potential utility of two distinct statistical methodologies in their application. Application: Two clinically diverse biomedical systems, linked by the common methodological interest of assessing …
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Identification and monitoring of oil pipeline spill fire using space applications
… of the MODIS instrument to study the spatio-temporal correlation between spills and fire events by attempting to investigate whether the largest spills by volume that resulted in fires could be detected from space in near-real time. Although the NOSDRA oil spill reports are plagued with …
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Spatiotemporal Variability of CO2, Solar-Induced Fluorescence, And Precipitation Over the Tropical Rainforests
… models to explore photosynthetic activity, spatiotemporal variability, and correlation among critical variables (e.g., Solar-induced chlorophyll fluorescence (SIF), CO2, precipitation, high vapor pressure deficit (VPD), and burned areas). Specifically, we use Orbiting Carbon Observatory 2 (OCO-2) …
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Content based video retrieval via spatial-temporal information discovery.
… The framework, however, ignores spatial and temporal information contained in videos, which plays a fundamental role in unveiling semantic meanings. The information includes not only the spatial layout of visual content on a still frame (image), but also temporal changes across the sequential …
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Performance evaluation of communication systems with transmit diversity
… part, the BER performance of STBC over a spatio-temporal correlated channel with coherent and noncoherent detection is illustrated, where a general space-time correlation model is utilized. The simulation results demonstrate that spatial correlation negatively effects the performance of the STBC …
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A fast optical imaging study of frontoparietal preparatory dynamics in response-mode switching
… processes by examining the millisecond-scale temporal correlation of activity in distinct regions during the preparatory period of a response-mode switching task. Participants received a pre-cue indicating whether to respond vocally or manually. They then saw or heard the letter “L” or “R”, …
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A New State Transition Model for Forecasting-Aided State Estimation for the Grid of the Future
… of filtered system states and it takes spatial correlation among the states into account. Once the states with high spatial correlation are identified, the time-series models are developed to capture the dependency of voltages and angles in time and among each other. The temporal correlation in …
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Empirical rate-distortion study of compressive sensing-based joint source-channel coding
… the rate-distortion behavior when sources have temporal and spatial dependencies. We show that, taking advantage of both spatial and temporal correlations over merely considering the temporal correlation between the signals allows us to achieve an average of a factor of approximately 2.5 times …
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Comparison between different techniques of preprocessing for resting state fMRI analysis
… as the name suggests is defined as significant temporal correlation between spatially distinct regions of the brain during rest. In this thesis, fMRI resting state dataset was analyzed using different available processing techniques with the same fMRI data to study differences between the …
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Temporally Correlated Dirichlet Processes in Pollution Receptor Modeling
… these assumptions, the existence of temporal correlation among PM measurements and time-varying source profiles is commonly accepted. In this thesis an approach to multivariate receptor modeling is developed in which the temporal structure of PM measurements is accounted for by …
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PROPERTIES AND CORRELATION OF FLARES AND CORONAL MASS EJECTIONS AND THEIR POSSIBLE RELEVANCE ON THE SOUTHERN NIGHT SKY BACKGROUND : A STATISTICAL STUDY
… to produce eruptive events ? -- What kind of correlation exists between flares (mainly confined to the solar atmosphere) and coronal mass ejections that, by definition, expel magnetized clouds into the interplanetary space ? -- Can the charged particles emitted during these events and arriving …
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Strength out of Weakness: Harnessing Information Gained from the Pair Structure of Composite Marginal Likelihood Estimation
… over time and the identification of neglected temporal correlation. The third paper explores the effective use of power weights in CML estimation, particularly in unbalanced panel settings and in the presence of unaccounted autoregressive error structures, to reduce the variance and asymptotic …
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Phase- and amplitude-coupling are tied by an intrinsic spatial organization but show divergent stimulus-related changes
… between the envelopes of two signals, reflects correlation of activation amplitude. Despite quantifying different electrophysiological properties, the relationship between PhC and AmpC remains largely unknown. We assessed spatial and temporal correspondence between PhC and AmpC over 5 canonical …
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Power Grid Partitioning and Monitoring Methods for Improving Resilience
… imputation and prediction exploiting the spatio-temporal correlation in PMU measurements are outlined. A deep-learning-based methodology for identifying the location of temporary power systems faults is also illustrated. As severe weather events become more frequent, and the threats from …
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The variable contribution of larval habitats on the production of mosquitoes that transmit West Nile Virus: a landscape epidemiology approach
… One part of the study region had a spatial and temporal correlation between larval mosquitoes and adult mosquitoes, but other places had high adult abundance without a clear indication of the larval habitat contributing to that increase. It is important to consider multiple types of mosquito …
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