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 18 of 18 for “"Stability prediction"”.
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A methodology for centrifugal compressor stability prediction
… an integrated methodology to predict the stability limit and the stall inception pattern in highly-loaded centrifugal compressors with vaned diffusers. The approach, based on a body force representation of the blade rows, is different from previous research in that the prediction is …
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Transient Stability Prediction based on Synchronized Phasor Measurements and Controlled Islanding
Traditional methods for predicting transient stability of power systems such as the direct method, the time domain approach, and the energy function methods do not work well for online transient stability predictions problems. With the advent of Phasor Measurement Units (PMUs) in power systems, it …
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A kriging-enhanced aeroelastic stability prediction tool for radial turbomachinery using piston theory
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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The application of phasor measurements for adaptive protection and control
… swing phenomena, identifying the onset of instability, and then issuing a stabilizing command. In this work, the protection system is to maintain the reliability! ensure the secure operation, and prevent total collapse of the power system. The work is based upon methods of clustering for …
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Novel Machine Learning Models for Identification, Characterization and Prioritization of Phenotype-Genotype Associations
… thesis, I focus on the problem of predicting stability effects of non-synonymous coding mutations as a tool for the prioritization of variants discovered in association mapping studies. I introduce ELASPIC: Ensemble Learning Approach for Stability Prediction of Interface and Core mutations, a …
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Polymer drug dispersions: understanding structure and dynamics
Poor physical stability is a limiting factor in the pharmaceutical development of APIs. Amorphous drugs are attractive due to increased dissolution; however can unpredictably revert to the thermodynamically stable crystalline form. Accurate prediction of molecular level physical stability would be …
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Characterization of cavitation instabilities in rocket engine turbopump inducers
… rotating cavitation is the primary cavitation instability considered in this thesis. A recently developed hypothesis for rotating cavitation onset is assessed through novel experimental analysis and a previously developed body force modeling approach using the MIT inducer, representative of the …
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Theoretical foundations for finite-time transient stability and sensitivity analysis of power systems
<p>Transient stability and sensitivity analysis of power systems are problems of enormous academic and practical interest. These classical problems have received renewed interest, because of the advancement in sensor technology in the form of phasor measurement units (PMUs). The advancement in …
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Accelerating Liquid Formulation Design using Lab Automation and Machine Learning
… and machine learning (ML) to build property prediction models for a system of shampoo formulations. The methods developed in this work are generalisable to other surfactant-based products in the personal care industry. ML and optimisation have expedited a broad range of product and process …
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Renewable energy supply and storage: liquid metal battery stability
… periods of battery charge/discharge. The linear stability model for the interface wave analysis is developed and applied to study the multiple mode interaction. It is found that for the selection of liquid materials most suitable for practical implementation, the interface between the lower …
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Investigation and Modelling of Fetal Sheep Maturation
… fast-soma model, state equations are listed and stability prediction are performed by varying the gap junction diffusion strength, subcortical drive, and the rate constants of the near- and far-dendritic tree. In the end, I selected the classic and simpler Waikato slow-soma mean-field model to …
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3D Geomechanical Modeling of Shale Formations and its Application in Borehole Stabilization
The issue of borehole instability as seen in shale formation drilling is a major problem currently facing the industry. In recent years, deep exploration and more intensive development of hard and brittle shale gas reservoirs has shown that borehole instability is a widely occurring issue present …
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Partial Upgrading of Bitumen Through Combinations of Deasphalting and Visbreaking
… to predict the product properties, product stability versus asphaltene precipitation, and diluent requirements for the combined processes. To collect the necessary data, an induction-heated reactor was commissioned and its performance was validated against previous data from a conventionally …
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Development of a technical management tool for settlement and stability behaviour of municipal solid waste landfills
… the perspective of structural and geotechnical stability. Prediction of the long-term settlement of MSW for the final cover design as well as end-use facility design such as recreational facilities, industrial/commercial facilities is necessary. In addition, estimation of settlement is needed to …
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Critical Substation Risk Assessment and Mitigation
… voltage collapse during cascades. Transient stability is included through the use of a supervised machine learning algorithm called random forests. These forests allow for fast, robust and accurate prediction of transient stability during loss-of-substation initiated cascades. Substation risk …
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Enhancing Mine Subsidence Prediction and Control Methodologies for Long-Term Landscape Stability
Prediction and control methodologies for ground deformation due to underground mining (commonly referred to as mine subsidence) provide engineers with the means to minimize negative effects on the surface. Due to the complexity of subsidence-related movements, numerous techniques exist for …