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Dissertations / Theses on the topic 'GAS Algorithm'

Author: Grafiati

Published: 4 June 2025

Last updated: 15 July 2025

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1

Lovelady, April. "Development of a control algorithm for a dynamic gas mixing system." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3775.

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An algorithm was developed to control the partial pressures of N2, O2, and CO2 in a gas mixing tank. The gases were premixed before being introduced into the low pressure Mars Dome. As an attempt to reduce the effects of pressure, the number of moles of the component gases was calculated and used to determine when gases needed to be added to the system or when gas concentrations needed to be diluted. There were two trial runs during each of the two experiments carried out. The total pressures in both the mixing tank and the Mars Dome remained within their limits of constraint during both trial

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2

Sampath, Suresh. "Fault diagnostics for advanced cycle marine gas turbine using genetic algorithm." Thesis, Cranfield University, 2003. http://dspace.lib.cranfield.ac.uk/handle/1826/10204.

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The major challenges faced by the gas turbine industry, for both the users and the manufacturers, is the reduction in life cycle costs , as well as the safe and efficient running of gas turbines. In view of the above, it would be advantageous to have a diagnostics system capable of reliably detecting component faults (even though limited to gas path components) in a quantitative marmer. V This thesis presents the development an integrated fault diagnostics model for identifying shifts in component performance and sensor faults using advanced concepts in genetic algorithm. The diagnostics model

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3

Maciel, Lucas da Silva. "A novel swarm-based algorithm for phase unwrapping." reponame:Repositório Institucional da UFSC, 2014. https://repositorio.ufsc.br/xmlui/handle/123456789/129595.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2014.<br>Made available in DSpace on 2015-02-05T21:16:46Z (GMT). No. of bitstreams: 1 331656.pdf: 3739147 bytes, checksum: 4434e631824c3243a2eb1e0e7148fe81 (MD5) Previous issue date: 2014<br>O correto funcionamento de tubulações subterrâneas para o transporte de gás e petróleo depende de um monitoramento frequente e correto dos estados de tensões. Avanços recentes na medição de tensões residuais têm aplicado métodos ópticos em conjunto com o al

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4

Smith, Nancy T. "Evolving Credible Facial Expressions with Interactive GAs." NSUWorks, 2012. http://nsuworks.nova.edu/gscis_etd/310.

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A major focus of research in computer graphics is the modeling and animation of realistic human faces. Modeling and animation of facial expressions is a very difficult task, requiring extensive manual manipulation by computer artists. Our primary hypothesis was that the use of machine learning techniques could reduce the manual labor by providing some automation to the process. The goal of this dissertation was to determine the effectiveness of using an interactive genetic algorithm (IGA) to generate realistic variations in facial expressions. An IGA's effectiveness is measured by satisfaction

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Thanawalla, Rutang Kirit. "Valuation of gas swing options using an extended least squares Monte Carlo algorithm." Thesis, Heriot-Watt University, 2006. http://hdl.handle.net/10399/144.

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6

Vick, Andrew W. "Genetic Fuzzy Controller for a Gas Turbine Fuel System." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1291053513.

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Posinasetti, Praveen. "Process modelling and control of pulse gas metal arc welding of aluminum." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16530/1/Praveen_Posinasetti_Thesis.pdf.

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Recent developments in materials and material joining [specifically Aluminum and Pulse Gas Metal Arc Welding (GMAW-P) technology] have increased the scope and extent of their areas of application. However, stern market demand for the improved weld quality necessitates the need for automation of the welding processes. As a result, improvements in the process parameter feedback, sensing and control, are necessary to successfully develop the automated control technology for the welding processes. Hence, several aspects of the GMAW-P process have been investigated in this study in order to improve

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8

Posinasetti, Praveen. "Process modelling and control of pulse gas metal arc welding of aluminum." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16530/.

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Recent developments in materials and material joining [specifically Aluminum and Pulse Gas Metal Arc Welding (GMAW-P) technology] have increased the scope and extent of their areas of application. However, stern market demand for the improved weld quality necessitates the need for automation of the welding processes. As a result, improvements in the process parameter feedback, sensing and control, are necessary to successfully develop the automated control technology for the welding processes. Hence, several aspects of the GMAW-P process have been investigated in this study in order to improve

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9

Jang, Won-Hyouk. "Novel cost allocation framework for natural gas processes: methodology and application to plan economic optimization." Diss., Texas A&M University, 2004. http://hdl.handle.net/1969.1/368.

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Natural gas plants can have multiple owners for raw natural gas streams and processing facilities as well as for multiple products. Therefore, a proper cost allocation method is necessary for taxation of the profits from natural gas and crude oil as well as for cost sharing among gas producers. However, cost allocation methods most often used in accounting, such as the sales value method and the physical units method, may produce unacceptable or even illogical results when applied to natural gas processes. Wright and Hall (1998) proposed a new approach called the design benefit method (DBM),

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10

Kvam, Asgeir. "Detection of Stiction in Control Valves : an Algorithm for the Offshore Oil and Gas Industry." Thesis, Norwegian University of Science and Technology, Department of Engineering Cybernetics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-8973.

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<p>Valve stiction is one of the largest stand-alone reasons for oscillatory behavior in process industry. It is reported by Siemens Oil and Gas that valve stiction is a problem that is hard and time consuming to detect at offshore production plants for oil and gas. As a result, Siemens Oil and Gas wants to develop an algorithm that detects stiction. The algorithm is thought to be a feature of the logging system of Siemens in the future. To better understand the problem and scope of stiction at a offshore oil and gas production plant, the effects of stiction is studied on a model of such a pl

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11

FIGUEIREDO, AURELIO MORAES. "MAPPING HORIZONS AND SEISMIC FAULTS FROM 3D SEISMIC DATA USING THE GROWING NEURAL GAS ALGORITHM." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2007. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=11341@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>GRUPO DE TECNOLOGIA DE COMPUTAÇÃO GRÁFICA - PUC-RIO<br>Neste trabalho apresentamos um algoritmo baseado em agrupamento de dados para o mapeamento automático de horizontes e de falhas sísmicas a partir de dados sísmicos 3D. Apresentamos uma técnica para quantizar o volume sísmico de entrada a partir dos neurônios do grafo resultante do processo de treinamento de uma instância do algoritmo Growing Neural Gas (GNG). No conjunto de amostras de entrada utilizadas pelo GNG, cada

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WAGNER, GUSTAVO NUNES. "INTERACTIVE VISUALIZATION OF MASSIVE ENGINEERING MODELS IN THE OIL & GAS INDUSTRY USING THE FAR VOXELS ALGORITHM." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2007. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=10718@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Projetos recentes de Estruturas Offshore criaram a necessidade de prototipação virtual de modelos de CAD massivos. Esses modelos tipicamente têm centenas de milhões de triângulos e, por essa razão, não podem ser enviados diretamente para as placas gráficas atuais que podem renderizar interativamente apenas alguns milhões de triângulos. Existem várias abordagens para lidar com esse problema incluindo uma nova estratégia de uso de impostores baseada na visualização de Voxels. Essa estratégia é promissora, já que lida bem com

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Mishra, Avdesh. "Three-Dimensional Ideal Gas Reference State based Energy Function." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/1986.

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Energy functions are found to be a key of protein structure prediction. In this work, we propose a novel 3-dimensional energy function based on hydrophobic-hydrophilic properties of amino acid where we consider at least three different possible interaction of amino acid in a 3-dimensional sphere categorized as hydrophilic versus hydrophilic, hydrophobic versus hydrophobic and hydrophobic versus hydrophilic. Each of these interactions are governed by a 3-dimensional parameter alpha used to model the interaction and 3-dimensional parameter beta used to model weight of contribution. We use Geneti

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Muir, Stuart. "A relativisitic, 3-dimensional smoothed particle hydrodynamics (SPH) algorithm and its applications." Monash University, School of Mathematical Sciences, 2003. http://arrow.monash.edu.au/hdl/1959.1/9513.

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Lindersen, Peter Johan Bergh. "Modelling of Subsurface Releases of Oil and Gas : Testing of a New Algorithm for Droplet Size Formation and Laboratory Verification." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for kjemisk prosessteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-22374.

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The objective of the Master's thesis has been modelling of subsurface blowouts of oil and gas. The main objective was to the test a new algorithm for droplet size formation implemented into SINTEF's simulation tool ``Marine Environmental Modelling Workbench'', MEMW. A few laboratory experiments were performed with three different oil types, i.e. Alve, Norne and Svale. The crude oils were utilized in MEMW to investigate different effects such as addition of gas or dispersant. The condensate, Alve, was the default oil in the simulations due to its low viscosity.The last coupl

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Біланчук, Олександр Олександрович, Іштван Іштванович Гоч, Oleksandr Bilanchuk та Ishtvan Goch. "Розробка та дослідження автоматизованої системи підігріву природного газу на ГРС м. Тернополя". Master's thesis, Тернопіль, ТНТУ, 2020. http://elartu.tntu.edu.ua/handle/lib/33214.

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Роботу виконано на кафедрі ком’пютерно-інтегрованих технологій Тернопільського національного технічного університету імені Івана Пулюя Міністерства освіти і науки України Захист відбудеться 23 грудня 2020 р. о 08 .00 годині на засіданні екзаменаційної комісії № 24 у Тернопільському національному технічному університеті імені Івана Пулюя за адресою: 46001, м. Тернопіль, вул.Руська, 56, навчальний корпус №1, ауд. 403<br>В кваліфікаційній роботі виконано розробку та дослідження автоматизованої системи підігріву природного газу на ГРС м. Тернополя. In the qualification work the development and re

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Bozorg, Marjan. "Optimization of membrane process architecture." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0252.

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Les procédés de séparation membranaire sont une technologie bien connue et déjà largement utilisée dans le domaine de la purification des gaz. Ces procédés sont applicables à de nombreux secteurs d’activités industriels. Selon les performances de séparation recherchées, elles peuvent constituer une alternative intéressante aux technologies existantes de traitement des gaz (adsorption, cryogénie, contacteurs gaz/liquide). Pour exploiter au mieux cette technologie, le développement d'outils d’aide à la décision permettant d’identifier les procédés et les conditions opératoires économiquement ava

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Hernandez-Rodriguez, Guillermo. "Optimisation multiobjectif de réseaux de transport de gaz naturel." Thesis, Toulouse, INPT, 2011. http://www.theses.fr/2011INPT0067/document.

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L'optimisation de l'exploitation d'un réseau de transport de gaz naturel (RTGN) est typiquement un problème d'optimisation multiobjectif, faisant intervenir notamment la minimisation de la consommation énergétique dans les stations de compression, la maximisation du rendement, etc. Cependant, très peu de travaux concernant l'optimisation multiobjectif des réseaux de gazoducs sont présentés dans la littérature. Ainsi, ce travail vise à fournir un cadre général de formulation et de résolution de problèmes d'optimisation multiobjectif liés aux RTGN. Dans la première partie de l'étude, le modèle d

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Lin, Jen-Pin. "Impedance Extraction by MATLAB/Simulink and LabView/Multisim." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5257.

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This thesis studies the techniques of small-signal impedance measurement in three-phase power systems. Stability issue has become critically important since power electronics are highly applied in power distribution and conversion systems. Controlled output systems cause the risk of instability. In order to obtain the impedance model, an impedance extraction in D-Q reference frame algorithm is developed. This paper also applied Interpolated Fast Fourier Transform to increase accuracy of impedance model. Based on the voltage injection, Phase-Locked Loop, Park Transform, D-Q reference frame, and

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Obayopo, S. O. (Surajudeen Olanrewaju). "Performance enhancement in proton exchange membrane cell - numerical modeling and optimisation." Thesis, University of Pretoria, 2012. http://hdl.handle.net/2263/26247.

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Sustainable growth and development in a society requires energy supply that is efficient, affordable, readily available and, in the long term, sustainable without causing negative societal impacts, such as environmental pollution and its attendant consequences. In this respect, proton exchange membrane (PEM) fuel cells offer a promising alternative to existing conventional fossil fuel sources for transport and stationary applications due to its high efficiency, low-temperature operation, high power density, fast start-up and its portability for mobile applications. However, to fully harness th

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Eppard, William M. "Kinetic algorithms for non-equilibrium gas dynamics." Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06062008-165605/.

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Cimiano, Lavin Philipp. "Sexual selection in GAs." [S.l. : s.n.], 2001. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB9578215.

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23

Basupi, Innocent. "Adaptive water distribution system design under future uncertainty." Thesis, University of Exeter, 2013. http://hdl.handle.net/10871/14722.

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A water distribution system (WDS) design deals with achieving the desired network performance. WDS design can involve new and / or existing network redesigns in order to keep up with the required service performance. Very often, WDS design is expensive, which encourages cost effectiveness in the required investments. Moreover, WDS design is associated with adverse environmental implications such as greenhouse gas (GHG) emissions due to energy consumption. GHGs are associated with global warming and climate change. Climate change is generally understood to cause reduction in water available at

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Restrepo, Lopez Ricardo. "Topics in spatial and dynamical phase transitions of interacting particle systems." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42729.

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In this work we provide several improvements in the study of phase transitions of interacting particle systems: - We determine a quantitative relation between non-extremality of the limiting Gibbs measure of a tree-based spin system, and the temporal mixing of the Glauber Dynamics over its finite projections. We define the concept of 'sensitivity' of a reconstruction scheme to establish such a relation. In particular, we focus on the independent sets model, determining a phase transition for the mixing time of the Glauber dynamics at the same location of the extremality threshold of the simpl

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Pastorek, Lukáš. "Bio-Inspired Prototype-Based Models and Applied Gompertzian Dynamics in Cluster Analysis." Doctoral thesis, Vysoká škola ekonomická v Praze, 2010. http://www.nusl.cz/ntk/nusl-200218.

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The thesis deals with the analysis of the clustering and mapping techniques derived from the principles of the neural and statistical learning and growth theory. The selected branch of the unsupervised bio-inspired prototype-based models is described in terms of the proposed logical framework, which highlights the continuity of these methods with the classical "pure" statistical methods. Moreover, as those methods are broadly understood as the "black boxes" with the unpredictable, unclear and especially hidden behavior, the examples of the spatial computational and organizational patterns in t

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Chen, Zhiying Ph D. Massachusetts Institute of Technology. "Experimental demonstration and exploration of quantum lattice gas algorithms." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/34435.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 2005.<br>Includes bibliographical references (p. 107-112).<br>Recently, it has been suggested that an array of small quantum information processors sharing classical information can be used to solve selected computational problems, referred to as a type-II quantum computer. The first concrete implementation demonstrated here solves the diffusion equation, and it provides a test example from which to probe the strengths and limitations of this new computation paradigm. The NMR experiment consists of encoding a

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Assémat, Céline. "Management of thermal power plants through use values." Thesis, KTH, Elektriska energisystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175811.

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Electricity is an essential good, which can hardly be replaced. It can be produced thanks to a wide rangeof sources, from coal to nuclear, not to mention renewables such as wind and solar. In order to meetdemand at the lowest cost, an optimisation is made on electricity markets between the differentproduction plants. This optimisation mainly relies on the electricity production cost of each technology.In order to include long-term constraints in the short-term optimisation, a so-called use value (oropportunity cost) can be computed and added to the production cost. One long-term constraint tha

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GAVANCHO, KARIN YANET SUPO. "SELECTION OF PORTFOLIOS OF OIL AND GAS PRODUCTION BY GENETIC ALGORITHMS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2002. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=3167@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Esta dissertação investiga um sistema de apoio à decisão baseado em Algoritmos Genéticos e Simulação Monte Carlo para a formação de carteiras de projetos de petróleo e gás. O objetivo do trabalho é avaliar o desempenho de Algoritmos Genéticos -AG- para selecionar projetos que formarão a carteira. A construção de carteiras de projetos é um problema de múltiplos objetivos, onde se deseja escolher um conjunto de projetos com perspectivas de lucro para formar uma carteira. O sistema emprega o Algoritmo Genético para forma

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Ben, Hariz Houssein. "The optimisation of the usage of gas turbine generation sets for oil and gas production using genetic algorithms." Thesis, Cranfield University, 2010. http://hdl.handle.net/1826/4479.

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The privatisations of the energy supply industries world-wide has meant that emphasis is now on how to profitably compete. In this environment the development of effective models for optimisation of power plant are of increasing importance, particularly operational strategies for off-design conditions, and particularly for gas turbine engines. Maximisation of plant profitability necessitates proper and integrated evaluation of many factors, the most important of which are: availability and price of fuel, system efficiency and performance, life cycle costing of plant and machinery, present and

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Hariz, Houssein Ben. "The Optimisation of the usage of gas turbine gereration sets for oil and gas production using genetic algorithms." Thesis, Cranfield University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515314.

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The privatisations of the energy supply industries world-wide has meant that emphasis is now on how to profitably compete. In this environment the development of effective models for optimisation of power plant are of increasing importance, particularly operational strategies for off-design conditions, and particularly for gas turbine engines. Maximisation of plant profitability necessitates proper and integrated evaluation of many factors, the most important of which are: availability and price of fuel, system efficiency and performance, life cycle costing of plant and machinery, present and

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Roy, Rajkumar. "Adaptive search and the preliminary design of gas turbine blade cooling systems." Thesis, University of Plymouth, 1997. http://hdl.handle.net/10026.1/2664.

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This research concerns the integration of Adaptive Search (AS) technique such as the Genetic Algorithms (GA) with knowledge based software to develop a research prototype of an Adaptive Search Manager (ASM). The developed approach allows to utilise both quantitative and qualitative information in engineering design decision making. A Fuzzy Expert System manipulates AS software within the design environment concerning the preliminary design of gas turbine blade cooling systems. Steady state cooling hole geometry models have been developed for the project in collaboration with Rolls Royce plc. T

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Zheng, Xinmin, and 鄭新敏. "A fuzzy genetic algorithms (GAs) model for time-cost optimization in construction." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B27510839.

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HYETT, CRISTON MATTHEW. "OPTIMIZATIONS OF CHOP: AN EXTENDED MEATAXE ALGORITHM IN GAP." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/614112.

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The Meataxe algorithm is a popular algorithm to test modules for irreducibility. I review the theory and particular cases of the Meataxe algorithm and the analogies that can be drawn from normal forms of matrices. I describe my implementation of an algorithm already implemented in GAP (Groups, Algorithms, Programming) to compute the simple composition factors of a module, and implement changes that should in theory speed up computations with large modules. I then test and evaluate predictions.

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O'Donnell, Erin. "Detection and identification of effluent gases using invariant hyperspectral algorithms /." Link to online verson, 2005. https://ritdml.rit.edu/dspace/handle/1850/1124.

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Wassen, Erik. "Entwicklung paralleler Algorithmen zur numerischen Simulation von Gas-Partikel-Strömungen unter Berücksichtigung von Partikel-Partikel-Kollisionen." [S.l. : s.n.], 1998. http://deposit.ddb.de/cgi-bin/dokserv?idn=956133320.

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SALCEDO, Javier. "DESIGN AND CHARACTERIZATION OF NOVELDEVICES FOR NEW GENERATION OF ELECTROSTATICDISCHARGE (ESD) PROTECTION STRUCTURES." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2812.

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The technology evolution and complexity of new circuit applications involve emerging reliability problems and even more sensitivity of integrated circuits (ICs) to electrostatic discharge (ESD)-induced damage. Regardless of the aggressive evolution in downscaling and subsequent improvement in applications' performance, ICs still should comply with minimum standards of ESD robustness in order to be commercially viable. Although the topic of ESD has received attention industry-wide, the design of robust protection structures and circuits remains challenging because ESD failure mechanisms continu

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Rogero, J. M. "A Genetic algorithms based optimisation tool for the preliminary design of gas turbine combustors." Thesis, Cranfield University, 2002. http://hdl.handle.net/1826/93.

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The aim of this research is to develop an optimisation tool to support the preliminary design of gas turbine combustors by providing a partial automation of the design process. This tool is to enable better design to be obtained faster, providing a reduction in the development costs and time to market of new engines. The first phase of this work involved the analysis of the combustor design process with the aim of identifying the critical tasks that are suitable for being automated and most importantly identifying the key parameters describing the performance of a combustor. During the secon

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Sundar, Meghana. "Sensor array optimization application of cluster analysis and genetic algorithms for sensor selection /." Diss., Online access via UMI:, 2007.

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Thesis (M.S.)--State University of New York at Binghamton, Thomas J. Watson School of Engineering and Applied Science, Department of Systems Science and Industrial Engineering, 2007.<br>Includes bibliographical references.

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Pongcharoen, Pupong. "Genetic algorithms for production scheduling in capital goods industries." Thesis, University of Newcastle Upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366573.

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Armagan, Emre. "Decomposition algorithms for global solution of deterministic and stochastic pooling problems in natural gas value chains." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/46629.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.<br>Includes bibliographical references (leaves 153-158).<br>In this thesis, a Benders decomposition algorithm is designed and implemented to solve both deterministic and stochastic pooling problems to global optimality. Convergence of the algorithm to a global optimum is proved and then it is implemented both in GAMS and C++ to get the best performance. A series of example problems are solved, both with the proposed Benders decomposition algorithm and commercially available global optimization software

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Pradhan, Manoj Kumar. "Conformal Thermal Models for Optimal Loading and Elapsed Life Estimation of Power Transformers." Thesis, Indian Institute of Science, 2004. https://etd.iisc.ac.in/handle/2005/97.

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Power and Generator Transformers are important and expensive elements of a power system. Inadvertent failure of Power Transformers would cause long interruption in power supply with consequent loss of reliability and revenue to the supply utilities. The mineral oil impregnated paper, OIP, is an insulation of choice in large power transformers in view of its excellent dielectric and other properties, besides being relatively inexpensive. During the normal working regime of the transformer, the insulation thereof is subjected to various stresses, the more important among them are, electrical

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Pradhan, Manoj Kumar. "Conformal Thermal Models for Optimal Loading and Elapsed Life Estimation of Power Transformers." Thesis, Indian Institute of Science, 2004. http://hdl.handle.net/2005/97.

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Power and Generator Transformers are important and expensive elements of a power system. Inadvertent failure of Power Transformers would cause long interruption in power supply with consequent loss of reliability and revenue to the supply utilities. The mineral oil impregnated paper, OIP, is an insulation of choice in large power transformers in view of its excellent dielectric and other properties, besides being relatively inexpensive. During the normal working regime of the transformer, the insulation thereof is subjected to various stresses, the more important among them are, electrical,

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Unalmis, Dilek. "Design Optimization Of Truss Structures Using Genetic Algorithms." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614932/index.pdf.

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Design optimization of truss structures is a popular topic in aerospace, mechanical, civil, and structural engineering due to benefits to industry. Common design problem for the structures is the weight minimization. Especially in aerospace engineering the minimization of the weight of the total structure gets the highest importance in the design. This study focuses on the design optimization of 2D and 3D truss structures. The objective function is the total mass of the structure which is subjected to stress and nodal displacement constraints. To optimize the design, Genetic Algorithm (GA) is

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Date, Paresh. "Identification for control : deterministic algorithms and error bounds." Thesis, University of Cambridge, 2000. https://www.repository.cam.ac.uk/handle/1810/251751.

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This dissertation deals with frequency domain identification of linear dynamic systems in a deterministic set-up. Various untuned algorithms are suggested, including one which is robustly convergent and asymptotically optimal (in n-width sense) for a finite model order. The suggested algorithms can easily be implemented in commercially available software for convex optimization.

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Davies, Nicholas M. "The application of open-path fourier transform infrared spectrometry using resolution enhancement to gaseous emissions monitoring." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312528.

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Schaffer, Scott E. (Scott Erwin). "The effect of a gap nonlinearity on recursive parameter identification algorithms." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/34039.

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Zhao, Long. "Novel Models and Algorithms for Uncertainty Management in Power Systems." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4971.

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This dissertation is a collection of previously-published manuscript and conference papers. In this dissertation, we will deal with a stochastic unit commitment problem with cooling systems for gas generators, a robust unit commitment problem with demand response and uncertain wind generation, and a power grid vulnerability analysis with transmission line switching. The latter two problems correspond to our theoretical contributions in two-stage robust optimization, i.e., how to efficiently solve a two-stage robust optimization, and how to deal with mixed-integer recourse in robust optimizatio

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Kovács, Peter. "Návrh a optimalizace struktur s elektromagnetickým zádržným pásmem." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-233538.

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Dizertační práce pojednává o návrhu a optimalizaci periodických struktur s elektromagnetickým zádržným pásmem (EBG – electromagnetic band gap) pro potlačení povrchových vln šířících se na elektricky tlustých dielektrických substrátech. Nepředvídatelné chování elektromagnetických vlastností těchto struktur v závislosti na parametrech elementární buňky činí jejích syntézi značně komplikovanou. Bez patřičného postupu je návrh EBG struktur metodou pokusu a omylu. V první části práce jsou shrnuty základní poznatky o šíření elektromagnetických vln v tzv. metamateriálech. Následně je diskutován správ

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Dinh, Duy Cuong. "Development of a Detailed Approach to Model the Solid Pyrolysis with the Coupling Between Solid and Gases Intra-Pores Phenomena." Electronic Thesis or Diss., Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2024. http://www.theses.fr/2024ESMA0029.

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La pyrolyse du bois est un processus crucial dans la science de la sécurité incendie car elle affecte la décomposition thermique et le comportement de combustion des matériaux. Le bois est un composite biopolymères (cellulose, hémicellulose et lignine) qui subit une pyrolyse complexe, produisant du charbon solide, du goudron et des gaz. Le processus de pyrolyse modifie également certaines caractéristiques importantes de l’échantillon (densité, conductivité thermique, capacité thermique, porosité, perméabilité, émissivité...) qui évoluent tout au long de la réaction de décomposition. La compréh

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SINGULANI, ANDERSON PIRES. "SIMULATION AND DESIGN OF GAAS/ALGAAS QUANTUM WELL SOLAR CELLS AIDED BY GENETIC ALGORITHM." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=15317@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>A energia é assunto estratégico para a grande maioria dos países e indústrias no mundo. O consumo atual energético é de 138,32 TWh por ano e é previsto um aumento de 44% até o ano de 2030 o que demonstra um mercado em expansão. Porém, a sociedade atual exige soluções energéticas que causem o menor impacto ambiental possível, colocando em dúvida o uso das fontes de energia utilizadas atualmente. O uso da energia solar é uma alternativa para auxiliar no atendimento da futura demanda de energia. O seu principal entrave é o custo de

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