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 20 of 160 for “"stabilizers"”.
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Centralized Control of Power System Stabilizers
… nonlinear controller that acts on power system stabilizers, to cooperatively increase the damping of problematic small signal oscillations all over the system. The structure based on decision trees results in a simple, efficient, and dependable methodology that imposes much less computational …
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Characterization of superconducting hardware for implementing quantum stabilizers
… we demonstrate such a hardware implementation of stabilizers in a superconducting circuit composed of chains of $\pi$-periodic Josephson elements called a plaquette. Each plaquette consists of a superconducting loop with two conventional Josephson junctions and two inductors. We study the phase …
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Poly(ionic liquid) stabilizers and new synthetic approaches
… constants. This new class of PILs was tested as stabilizers and phase transfer agents for carbon nanotubes in aqueous and organic media, and as binder materials to disperse electroactive powders and carbon additives in solid electrode in lithium-ion batteries. The incorporation of S and N atoms …
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Design of power system stabilizers using evolutionary algorithms
Over the past decades, the issue of low frequency oscillations has been of major concern to power system engineers. These oscillations range from 0.1 to 3Hz and tend to be poorly damped especially in systems equipped with high gain fast acting AVRs and highly interconnected networks. If these …
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Damping of electromechanical oscillations using power system stabilizers
… oscillations using Power System Stabilizers (PSS). The thesis focuses on three problems associated with the damping of these oscillations, namely the determination of the optimal locations of the PSS, the determination of the best control structure of the PSS and the design of …
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Design and modeling of superconducting hardware for implementing quantum stabilizers
<p>Superconducting qubits are one of the leading systems for implementing quantum processors. Realizing fault-tolerant quantum computation requires some form of quantum error correction, which typically involves performing repeated stabilizer operations on groups of physical qubits in an array to …
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Component Groups of Stabilizers in Algebraic Groups: Computational Methods and Applications
The component groups of the stabilizers of nilpotent elements in complex semisimple Lie algebras have been a relevant topic of research over the last century. The works of Alekseevskii (1979) and Sommers (1998) contributed significantly to the determination of such groups for exceptional Lie …
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Inter-Area Oscillation Damping with Power System Stabilizers and Synchronized Phasor Measurements
… to this problem is the addition of power system stabilizers to the automatic voltage regulators on the generators in the power system. The damping provided by this additional stabilizer provides the means to reduce the inhibiting effects of the oscillations. This thesis is an investigation of the …
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An exiplicit damping sensitivity expression for power system stabilizers applications in power systems
… its power transfer capability. Power System Stabilizers (PSS) are widely used to enhance the damping of electromechanical oscillatory modes. Conventional methods to tune power system stabilizers attempt to provide the required magnitude/phase shift compensation through frequency response or …
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Synthesis and Characterization of Polylactide-siloxane Block Copolymers as Magnetite Nanoparticle Dispersion Stabilizers
… for study as magnetite nanoparticle dispersion stabilizers. Magnetic nanoparticles are of interest in a variety of biomedical applications, including magnetic field-directed drug delivery and magnetic cell separations. Small magnetite nanoparticles are desirable due to their established …
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Preparation of Nitrile Containing Siloxane Triblock COpolymers and Their APplication As Stabilizers For Siloxane Magnetic Fluids
… siloxane block copolymers were developed as stabilizers for siloxane magnetic fluids. The siloxane magnetic fluids have been recently proposed as internal tamponades for retinal detachment surgery. PDMS-b-PCPMS-b-PDMSs (PDMS = polydimethylsiloxane, PCPMS = poly(3-cyanopropylmethylsiloxane) …
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Synthesis And Polymerization Of Bifunctional Five-membered Cyclic Dithiocarbonates And Their Use As Stabilizers For Magnetic Nan
… was desired for use as metallic nanoparticle stabilizers. A thermal decomposition oxidation method was used to synthesize the magnetic iron nanoparticles. The stabilized magnetic nanoparticles were characterized by transmission electron microscopy (TEM) to determine the shape and the size of …
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New Double-Responsive Micelles of Block Copolymers Based on N,N-Diethylacrylamide: Synthesis, Kinetics, Micellization, and Application as Emulsion Stabilizers
Thermo- and pH-responsive block copolymers based on (meth)acrylic acid and N,N-diethylacrylamide were synthesized and their aqueous solution behavior was studied. Such bishydrophilic block copolymers represent an interesting class of stimuli-responsive water-soluble materials whose macroscopic …
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AN OPTIMAL VARIABLE STRUCTURE STABILIZER FOR A MULTIMACHINE GENERATING PLANT
… and also due to the fact that the individual stabilizers now in use are not effective in damping out all modes of oscillation. A multivariable stabilizer can be advantageous to stabilize the dynamic performance of a multimachine plant in which all parallelly connected units act simultaneously. …
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The Stabilization of Acrylonitrile-Butadiene-Styrene Copolymers Against Heat and Light
… has been investigated in the presence of various stabilizers representative of two different mechanisms of antioxidant action; chain breaking and preventive. When present in the polymer as additives bis (3,5 ditert butyl 4 hydroxybenzyl) monosulphide and 4-benzoyl 3 hydroxyphenyl o-ethyl thioacid …
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Stabilization of Soft Clay Subgrades in Virginia Phase I Laboratory Study
… a suite of traditional and non-traditional stabilizers against three Virginia soils that have caused problems during construction or resulted in poor performance in service. The selected stabilizers were: quicklime, hydrated lime, pelletized lime, cement, lignosulfonate, synthetic polymer, …
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A preliminary investigation of the sterile-filterability of BCS class II drug nanosuspensions prepared via wet stirred media milling
… filter pore size and minimum amount of non-toxic stabilizers must be used to prevent side effects like pain on the injection site. The aim of this study is to prepare naproxen (NPX) nanosuspensions via wet stirred media milling using various polymers and surfactants as stabilizers and to assess …
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Rapid Soil Stabilization of Soft Clay Soils for Contingency Airfields
… been found to be among the most effective stabilizers for road and airfield applications, although recent developments show promise using nontraditional stabilizers. The purpose of this research is to determine the most effective stabilizers and dosage rates of stabilizers to increase the …
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