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 58 for “"Phase distribution"”.
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Protection Against Ungrounded Single Phase Open Circuit Faults in 3-Phase Distribution Transformers
… thesis explores the impacts and behavior of 3-phase distribution transformers when subject to ungrounded single phase open circuit faults. A simple 3-phase system is modeled using MATLAB Simulink and operation under fault conditions are simulated and studied. Simulation results are confirmed …
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The variation of sinter strength in the sinter bed due to the mineral phase distribution
Please read the abstract in the section 00front of this document
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Catalytic hydrodeoxygenation of dibenzofuran in a trickle bed reactor : kinetics, poisoning, and phase distribution effects
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1988.
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Quantification, phase distribution, and persistence of antiretroviral drugs in wastewater treatment systems and their ecotoxicological impacts in aquatic environments
… investigations revealed compound-specific phase distributions driven by physicochemical properties: emtricitabine, characterised by high polarity and low sorption affinity, remained predominantly in the aqueous phase, efavirenz exhibited strong sorption to solids, and nevirapine, with …
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Synthesis of Offset Dual Reflector Antennas Transforming a Given Feed Illumination Pattern Into a Specified Aperture Distribution
… feed pattern into a desired aperture field distribution through two reflections by an offset dual reflector system is investigated using the concepts of geometrical optics. A numerically rigorous solution for the reflector surfaces is developed. The solution gives an exact aperture phase …
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A thermal/thermo-mechanical and imaging study of component distribution and interaction in pharmaceutical film coats
… agent. The thermal, thermo-mechanical and phase distribution of EC films incorporated with plasticizers and/or HPMC were investigated using MTDSC, DMA and localized thermal analysis (LTA). These results were compared with the thermal properties and scanning electron microscopy (SEM) images …
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Hydrodynamics of trickle bed reactors (TBRS) packed with industrial catalyst using advanced measurement techniques
… TBR carried out the experiments to assess phase distribution and catalyst utilization with 1.18 cm inside diameter and 72 cm length at ambient pressure and temperature. The mixture of catalyst and fine particles displayed considerable improvements in the phase distribution, liquid holdup …
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CFD modelling of pipe erosion under multiphase flow regimes.
… focuses on predicting erosion under complex multiphase flow conditions with emphasis on double bend geometries. The Eulerian Multifluid-VOF coupled with the Lagrangian Discrete Phase Model (DPM) has been employed to account for the flow and particle behaviour, RNG k - e model for the effects of …
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Hard and tough electrodeposited aluminum-manganese alloys with tailored nanostructures
… upon the appearance of a secondary amorphous phase. In these dual-phase alloys, the phases are distributed in a characteristic domain-network structure. At high Mn contents, an amorphous phase that contains pre-existing nanoquasicrystalline nuclei dominates. Leveraging the effects of surface …
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Investigation of how oral bioaccessibility of potentially toxic elements in urban soils is affected by contaminant source and sampling techniques
… sources. Understanding their mobility, distribution, and geochemical interactions provides the necessary evidence to effectively assess the risks posed to people from exposure to soil contaminants.<br/><br/>The human health risk assessment often relies on total PTEs concentrations and …
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Development of MiST-IR : multi-spectral infrared thermography
… for measuring the 2-D wall temperature distribution or the 2-D phase distribution of the fluid above the surface. These methods make use of infrared thermography, a well developed practice involving the use of a high-speed infrared camera to collect visual data. By analyzing the data …
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Reciprocal space phase gradient neutron imaging
… Technology. An aluminum wedge produces various phase gradients and a specially designed sample is introduced as a test subject. Superposition of the waves from the sample beam path and the gradient wedge beam path creates an interferogram that suggests an inhomogeneous phase distribution. The …
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The development of a dual extrusion blending process and composites based on thermotropic liquid crystalline polymers and polypropylene
… a gear pump to the TLCP stream, a multiple port phase distribution system, static mixing design, minimization of residence time, die design, and introduction of thermal control over the entire strand production process. The TLCP material was introduced into the matrix phase by means of a multiple …
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Impacts of Distributed Generation on the Residential Distribution Network Operation
… the impacts of installing DG on a residential distribution circuit are explored. The work is focused on analyzing the impact of DG installation on distribution network operation including voltage analysis, electric losses and reliability of the system. First, various DG penetration levels and …
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Physics-assisted machine learning for X-ray imaging
… Unlike iterative algorithms which require a distribution that is known a priori, deep reconstruction networks can learn a prior distribution through sampling the statistical properties of the training distributions. In this thesis, we develop a physics-assisted machine learning algorithm, a …
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Near surface wear structure of ceramic components
… techniques including : (1) identification of phases and chemical species, (2) peak separation, (3) quantitative phase analysis, (4) intensity band simulation, and (5) line shape analysis, were applied to ceramic materials of silicon nitride, zirconia toughened alumina, fully and partially …
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Critical Analysis Of Transmitarray Antenna Design
… is presented. The basics of the aperture phase distribution and the analysis of the array elements are described. The radiation performances of the space fed arrays are discussed using the array theory approach. Three approaches for directivity and gain calculations are presented. Causes …
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Development of switchable planar reflectors for beam shaping realization
… frequency variation of 2.56GHz with dynamic phase range of 346 ̊ in X-band was demonstrated by rectangular slots in the centre and circular slots along width configuration while Ku-band measured results demonstrated a maximum frequency variation of 2.54GHz with dynamic phase range of 278 ̊ …
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An investigation of various computational techniques in optical fringe analysis.
… dimensional non-contact measurement of height distributions. A fringe pattern is projected onto an object's surface and, when viewed off-axis, it deforms to follow the shape of the object. The deformed fringe pattern is analysed to obtain its phase, information that is directly related to the …
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Hydrodynamics Of Trickle Bed Reactors: Measurements And Modeling
… on experimental characterization of the flow distribution, and development of computational fluid dynamics: CFD) model of trickle flow. The experimental study has been performed to examine the quality of liquid phase distribution in a high pressure system. The results were provided in terms of …
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