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 19 of 19 for “"varying environments"”.
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Testing the effect of varying environments on the speed of evolution
… a given goal. Recent studies have shown that varying environments might significantly speed up evolution, and suggested modularly varying goals can accelerate optimization algorithms. In this thesis, we study the effect of varying goals on the speed of evolution. Two test models, the NK model …
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Testing the effect of varying environments on the speed of evolution
… a given goal. Recent studies have shown that varying environments might significantly speed up evolution, and suggested modularly varying goals can accelerate optimization algorithms. In this thesis, we study the effect of varying goals on the speed of evolution. Two test models, the NK model …
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The effect of salinity on nutrient release from riverine and tributary estuarine sediments to the Chesapeake Bay under oxidizing and reducing conditions
… in various ratios to simulate seasonal, salinity-varying environments in the Chesapeake Bay and its tributary estuaries. Experiments were conducted under aerobic, anaerobic, and anoxic conditions. The results showed that high salinity can cause flocculation of particles and result in lower …
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Automated Regulation of LiDAR Detection Range with Model-Guided Extremum Seeking Control
… performance when it operates autonomously in varying environments. In this paper, an optimization approach is proposed to automatically regulate LiDAR detection range through a model-guided extremum seeking control (ESC) against the variation of ambient conditions. A neural network model is …
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Efficient Mapping of Environmental Phenomena with Autonomous Robotic Systems
… systems to map potentially nonstationary, time-varying environments. Key to modeling the environment from collected sensor data is the Gaussian process, used for its concise mathematical representation of the spatial field of interest. Towards realtime mapping, we develop a framework in which …
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Inversion for subbottom sound velocity profiles in the deep and shallow ocean
… from acoustic fields measured in laterally varying environments. We also investigate the errors associated with estimating varying modal eigenvalues, analogous to the estimation of time-varying frequencies in multicomponent signals, using time-varying autoregressive (TVAR) methods. We …
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Differences in Gene Expression Responses to Heat Shock Between Warm- and Cool-Adapted Isolates of Batrachochytrium dendrobatidis
… potential of Bd and its ability to spread across varying environments.
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Bridge/Adapt: A Systematic Cognitive Rehabilitation Curriculum
… Context refers to clients working on goals in varying environments. Lastly, clients work on tasks that increase in complexity with the hierarchical theme.</p>
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Graphical models and message passing receivers for interference limited communication systems
… to design receivers in interference limited environments. Prior designs generally adopt suboptimal approaches and often ignore the problem of channel estimation which limits their applicability in practical systems. This dissertation uses the graphical model representation of the OFDM system …
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Data-Driven Operations in Changing Environments
… solutions often requires the operational environments being stationary. However, recent examples have shown that the operational environments can change dynamically. It is thus imperative to design data-driven algorithms that is capable of working in time-varying environments. We first …
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Inversion for subbottom sound velocity profiles in the deep and shallow ocean
… from acoustic fields measured in laterally varying environments. We also investigate the errors associated with estimating varying modal eigenvalues, analogous to the estimation of time-varying frequencies in multicomponent signals, using time-varying autoregressive (TVAR) methods. We …
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Autonomous UAV Navigation and Path Planning for Civil Infrastructures Inspection and Structural Health Monitoring
… using two different test scenarios with varying levels of environmental complexity. The simulation programming was accomplished using a meta-operating system library named Robot Operating System (ROS), and three path planning algorithms from the OMPL library were selected to assess their …
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Optimal sensor placement for sewer capacity risk management
… technique along with testing its sensitivity to varying environments. The results demonstrated that a multi-phase search strategy, with a varying number of sensors deployed in each phase, could efficiently discover locations of unacceptable risk that could be managed via a perpetual monitoring, …
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Vegetation Variability and Its Hydro-Climatologic Dependence
… minimal anthropogenic influence, and have varying climates, soils, and land covers, and the objective is to identify and analyze the dominant influences on the vegetation greenness across the varying environments in the three ecoregions. Regression tree induction is employed and a relevance …
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An Investigation of the Factors that Facilitate and Inhibit the Range Expansion of an Invasive Plant
… demonstrated impressive performance across varying environments, often growing more than 3 m tall, producing hundreds of flowering culms within a single growing season, and maintaining positive population growth rates, even under intense competition with resident weeds. I also found evidence …
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Enviro-Mechanical Durability of Graphite/Epoxy Composite Materials
… models in practical applications, especially in varying environments.
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Behavioral Reconstruction of the Kerma Era Nubians
… sapiens from the same civilization cope with varying environments. Results suggest that the subsistence based population (C-Group) experienced the least amount of workload stress, suggesting increase in workload with an increase in agricultural intensity/social complexity, as both the urban …
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Optimizing nutrient availability for high-yield corn production
… to sustainably producing higher yields across varying environments. The central objective of this thesis was to determine how different fertilizer technologies available to corn producers can effectively be integrated in management decisions to optimize nutrient availability in their …
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Agronomic management and biostimulants to increase corn and soybean productivity
… growth and yield responses of soybean grown at varying plant populations to an AIPGR biostimulant applied during vegetative or reproductive growth as well as with and without foliar protection. Soybean was sown at three locations in Illinois (northern, central, and southern) to achieve low …