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 15 of 15 for “"Phase-selection"”.
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A Two-Phase Buck Converter with Optimum Phase Selection for Low Power Applications
… of light-load efficiency. Wei proposed a multiphase buck converter incorporating the baby-buck concept and optimum number of phases (ONP) control. This thesis research investigated Wei's multiphase buck converter to improve the light-load efficiency for smart cameras as the target application. …
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Development of a novel single-phase auto-reclosing scheme for distribution network with integrated distributed generation.
… out to investigate a fault identification and phase selection algorithm suitable to be used in a novel single-phase auto-reclosing (SPAR) scheme, specifically suitable to distribution networks with DGs, for maintaining the continued operation of DGs during fault conditions. The work in this PhD …
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Containerless processing of stainless steel
… video and pyrometry allowed the study of phase selection and secondary nucleation mechanisms for that alloy as well as measurements of delay times and growth velocities. Double recalescence events were observed for the first time at temperatures near the To temperature of the metastable …
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Development and validation of a computational approach to predicting the synthesis of inorganic materials
… first-principles calculations, and the downselection of these candidates to those experimentally accessible using available synthesis methods. While first-principles property screening has become routine, the present lack of a robust method for the identification of synthetically accessible …
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Decentralized graph-based multi-agent reinforcement learning for traffic signal optimization
… Markov decision process, where modular phase selection and fairness-aware rewards jointly balance vehicle efficiency and pedestrian accessibility. The framework is validated using a high-fidelity digital twin–based simulator with real-world traffic data and further demonstrated through …
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Signal timing optimization based on minimizing vehicle and pedestrian delay by genetic algorithm
… is to establish guidance for pedestrian crossing phase selection (two-way or scramble) and the length of WALK phase when scramble crossing is used. An optimization procedure for signal plans in an isolated intersection is developed. The procedure yields up to four phases for vehicles with either …
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A Two-Mode Synchronous Buck Converter for Low-Power Devices with the Sleep Mode
… converter, this research continues Yeago's two phase buck converter with optimum phase selection control and Zhao's two mode buck converter to further improve the light load efficiency for the target application. With 5V input voltage and 1.2V output voltage, the proposed two-mode synchronous …
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Exploring Dynamic Compilation and Cross-Layer Object Management Policies for Managed Language Applications
… analysis of the behavior of optimization phases in our dynamic compiler, and construct a custom experimental framework to determine the performance limits of phase selection during dynamic compilation. Next, we explore innovative memory management strategies to improve energy efficiency in …
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Ab initio prediction of thermodynamics in alkali metal-air batteries
… stability of Na-O compounds to identify the phase selection conditions that affect the performance of Na-O₂ batteries.
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Modeling of and experiments on electromagnetic levitation for materials processing
… including studies of nucleation and growth, phase selection, reaction kinetics, and thermophysical property measurements. However, the design of these systems has, for the most part, been empirical, and it will be shown that a more fundamental approach can provide benefits in a number of …
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Continual Traveling waves in Finite Structures: Theory, Simulations, and Experiments
A mechanical wave is generated as a result of an external force interacting with the well-defined medium and it propagates through that medium transferring energy from one location to another. The ability to generate and control the motion of the mechanical waves through the finite medium opens up …
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Microfluidic-generated Double Emulsions for Cell Study, Drug Delivery and Particle Therapeutics Fabrication
… by two amphiphilic surfactants, one for the oil phase and the other for the water phase. Selection of appropriate surfactants should hook with specific biological application to ensure stability and biocompatibility. Third, the choice of fluid and contents in the fluid will affect the viscosity …
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Non-hydrolytic Sol-gel (NHSG) Synthesis of Transition Metal Sulfides and Theoretical Investigations
… routes, and may lead to the discovery of new phases.<sup>3</sup> Because synthesis of sulfides through NHSG is an unexplored area, the synthesis conditions must be optimized for each metal. In this thesis, the Cu-S and Ta-S systems were thoroughly explored using NHSG techniques. Amorphous …
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In Situ Liquid Cell Transmission Electron Microscopy Studies of Pathological Biomineralization
… whether a particle stabilizes into a crystalline phase or dissolves. The presence of porosity and high-reactivity interfaces within these NPs suggests a strong link between nanoarchitecture and stability, which may explain why certain crystal morphologies are more resistant to dissolution and …
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Thermodynamics of Micellar Lyotropic Liquid Crystals
… (HCP) structures. Recently, a giant tetragonal σ phase containing 30 micelles of five different sizes was discovered in the aqueous LLC self-assembly of dianionic alkylphosphonate surfactants. The σ phase belongs to a class of tetrahedrally close-packed structures called Frank-Kasper (FK) phases, …