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 14 of 14 for “"model distribution"”.
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Exploration of climate mediated decline in a critically endangered southern hemisphere conifer over the last 40 years / Annabelle J. Rogers
… cedarbergensis in the last 40 years. By building distribution models using Maxent bioclimatic modelling for pre- and post- 1970’s point occurrence data, the distribution of the species pre- and post-1970’s were compared and assessed for significant change. Models predicted a clear range …
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Physics-based and data-driven inversion of magnetotelluric data for subsurface imaging
… kernels and multiple admissible subsurface models. Conventional deterministic approaches stabilize the inversion through regularization but depend strongly on prior assumptions and do not explicitly characterize uncertainty, while fully probabilistic methods are often computationally …
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Guiding Deep Probabilistic Models
Deep probabilistic models utilize deep neural networks to learn probability distributions in high-dimensional data spaces. Learning and inference in these models are complicated due to the difficulty of direct evaluation of the differences between the model distribution and the target. This thesis …
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Breaking Privacy in Model-Heterogeneous Federated Learning
… to collaboratively train a machine learning model. In FL, data never leaves client devices; instead, clients only share locally computed gradients or model parameters with a central server. As individual gradients may leak information about a given client's dataset, secure aggregation was …
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Role of Extracellular Polymeric Substances (EPS) on Biofilm Disinfection in a Model Drinking Water Distribution System
… biofilm clusters and redistributed biofilm, in a model distribution system with minimal disinfectant residuals. EPS contributed to bacterial surface properties, biofilm structural characteristics, disinfectant diffusion and reaction, organic matter retention and utilization, hence playing pivotal …
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Stability of distribution networks connected with distributed generation
… describes an investigation into the stability of distribution networks that are connected with distributed generators. Due to the restructuring of the electricity industry in the region as well as environmental concerns, distributed generation is bound to increase at a higher rate in the Southern …
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Optimal coordination of distributed energy resources in smart grids enabled by distributed optimization and transactive energy
Modern active distribution grids are characterized by the increasing penetration of distributed energy resources (DERs). The proper coordination and scheduling of a large numbers of these DERs can only be achieved at the nexus of new technological approaches and policies, primarily distributed …
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Robust Inference via Optimal Transport Ambiguity Sets
… driving. This challenge is exacerbated by distribution shift, in which the true data–generating distribution diverges from the nominal distribution on which our statistical methods were trained. In this thesis, we formalize distribution shifts via ambiguity sets—metric neighborhoods in the …
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Semiparametric Bayesian Approach using Weighted Dirichlet Process Mixture For Finance Statistical Models
… can be viewed as extension of DPM which relaxes model distribution assumptions. Meanwhile, WDPM requires to set weight functions and can cause extra computation burden. In this dissertation, we develop more efficient and exible WDPM approaches under three research topics. The first one is …
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Exact Sampling and Optimisation in Statistical Machine Translation
… to be performed over a high-complexity discrete distribution de ned by the intersection between a translation hypergraph and a target language model. This distribution is too complex to be represented exactly and one typically resorts to approximation techniques either to perform optimisation { …
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Truncation Models for Pareto and Exponential Distributions with Applications
… truncation. We revisit the truncated Pareto(TP) distribution, which is a useful power-law stochastic model for positive data that are subjected to truncation. We extend the standard TP model in the literature, where the main shape parameter α is assumed to be positive, to a more general case with …
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Evaluating Coliform Monitoring Strategies for Contamination Scenarios in a Distribution System Model
… 100 mL water samples every month in their distribution systems and to test these samples for the presence of total coliforms to comply with the Total Coliform Rule. How and where they take these samples is not specified. The Total Coliform Rule is currently undergoing review and revision. …
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Effectiveness of Disinfectant Residuals in Distribution Systems
… to maintain a residual concentration in the distribution system. The disinfectant residual is maintained to inactivate contamination that enters the distribution system, to control biofilms, and to act as a sentinel for contamination in the distribution system. A model was developed to …