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Dissertations / Theses on the topic 'Method of equivalent charges'

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Published: 30 May 2022

Last updated: 25 July 2025

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1

Susetyo, Budi. "Modélisation de l'impédance harmonique de charges agrégées." Grenoble INPG, 1995. http://www.theses.fr/1995INPG0027.

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Les applications de l’électronique de puissance contribuent à la pollution harmonique des réseaux électriques. Pour estimer le niveau de distorsion de tension, les différents composants du réseau doivent être modélisés en régime harmonique, en particulier les charges consommatrices, industrielles, commerciales et domestiques. L’étude concerne la modélisation de l’impédance harmonique des charges qui peuvent être séparées en deux grandes catégories: les charges passives et les charges dites actives qui réalisent une conversion d’énergie électromécanique. Les modèles disponibles pour les charges

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2

Грецких, Светлана Владимировна. "Ослабление статического геомагнитного поля ферромагнитными элементами домов". Thesis, Государственное учреждение "Институт технических проблем магнетизма НАН Украины", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/21435.

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Диссертация на соискание ученой степени кандидата технических наук по специальности 05.09.05 – теоретическая электротехника. – Национальный технический университет "Харьковский политехнический институт", Харьков, 2016. Диссертация посвящена математическому моделированию явления ослабления статического геомагнитного поля (ГМП) в помещениях жилых домов и разработке рекомендаций по методам его нормализации до безопасного уровня. Полученные в диссертации результаты в совокупности составляют существенный вклад в решение научно-прикладной задачи теоретической электротехники по моделированию явления

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3

Грецьких, Світлана Володимирівна. "Ослаблення статичного геомагнітного поля феромагнітними елементами будинків". Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/21433.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.09.05 – теоретична електротехніка. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2016. Дисертація присвячена математичному моделюванню явища ослаблення статичного геомагнітного поля (ГМП) в приміщеннях житлових будинків та розробці рекомендацій з методів його нормалізації до безпечного рівня. На прикладі циліндричної феромагнітної колони проведено моделювання ослаблення ГМП за допомогою методу еквівалентних (фіктивних) магнітних зарядів та розв’язано задачу розрахунку інд

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4

Oliveira, Yuri Álisson Rodrigues de. "Contribuição ao estudo dos níveis de energia em sistemas contendo íons Ln3+." Universidade Federal de Sergipe, 2016. https://ri.ufs.br/handle/riufs/5258.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>A new approach to describe the crystal field interaction in compounds that contains trivalent lanthanide ions is presented. It is considered the electrostatic balance of the optically active site, the effective charge of the central ion and the sign of crystal field parameters (CCP) as determinant factors in the crystal field interaction. The method of the first equivalent neighbours (MENN) was reformulated, and improvements in predicting the CCP and energy levels 7FJ of Eu3+ could be realized. Moreover, it was possibl

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5

Liu, Tao. "Equivalent Linearization Analysis Method for Base-isolated Buildings." Doctoral thesis, Università degli studi di Trento, 2014. https://hdl.handle.net/11572/369050.

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Base isolation system, as one of the most popular means to mitigate the seismic risks, often exhibits strong nonlinearity. To simplify the procedure of structural design, bilinear force-deformation behavior is recommended for isolation systems in most modern structural codes. Although base isolation system can be analyzed through nonlinear time history method, solving of a system with a large number of degrees of freedom may require an exorbitant amount of time. As a substitute, the equivalent linearization method is frequently used. Apparently, under given earthquake ground motions, the accur

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6

Liu, Tao. "Equivalent Linearization Analysis Method for Base-isolated Buildings." Doctoral thesis, University of Trento, 2014. http://eprints-phd.biblio.unitn.it/1240/1/Equivalent_Linearization_Analysis_Method_for_Base-isolated_Buildings.pdf.

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Base isolation system, as one of the most popular means to mitigate the seismic risks, often exhibits strong nonlinearity. To simplify the procedure of structural design, bilinear force-deformation behavior is recommended for isolation systems in most modern structural codes. Although base isolation system can be analyzed through nonlinear time history method, solving of a system with a large number of degrees of freedom may require an exorbitant amount of time. As a substitute, the equivalent linearization method is frequently used. Apparently, under given earthquake ground motions, the accu

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7

Castellani, Adriano. "Calcul du champ electrique par la methode des charges equivalentes pour la simulation d'une decharge bi-leader." Paris 11, 1995. http://www.theses.fr/1995PA112269.

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On presente ici les differentes etapes de la realisation d'un code de calcul permettant l'evaluation des distributions de potentiel et de champ electrique lors du developpement d'un claquage a partir d'un objet electriquement flottant. La premiere partie de l'etude consiste en l'analyse experimentale en laboratoire de ce type de decharge, mettant en evidence le developpement bidirectionnel de deux decharges de polarites opposees a partir d'un conducteur isole (systeme de bi-leader). Le calcul de champ, derive de la methode des charges equivalentes, a ete concu pour prendre en compte les contri

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8

Ekman, Jonas. "Electromagnetic modeling using the partial element equivalent circuit method." Doctoral thesis, Luleå, 2003. http://epubl.luth.se/1402-1544/2003/27.

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9

Munk, Jens. "An equivalent source inversion method for imaging complex structures /." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488191667184336.

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10

Becker, Ralf. "Consumption equivalent public capital method and a three generations model /." Marburg : Metropolis-Verl, 2002. http://www.gbv.de/dms/zbw/35493113X.pdf.

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11

Bécot, François-Xavier. "Tyre noise over impedance surfaces : efficient application of the equivalent sources method." Lyon, INSA, 2003. http://theses.insa-lyon.fr/publication/2003ISAL0036/these.pdf.

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Le but de ce travail est de comprendre et de contrôler les mécanismes de rayonnement du pneumatique, ceci en concevant des outils de prédiction efficients pour la propagation du bruit pneumatique / chaussée au dessus de surfaces d'impédances arbitraires. Le rayonnement du pneumatique est modélisé à l'aide de la méthode des Sources Equivalentes. Un modèle d'effets de sol dus à un plan d'impédance donnée est développé pour des sources de directivités arbitraire. Par ailleurs, la solution exacte du problème bi-dimensionel est présentée. Basé sur les deux outils de prédiction précédents, un modèle

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12

Min, Ki-Bok. "Determination of equivalent hydraulic and mechanical properties of fractured rock masses using the distinct element method." Licentiate thesis, KTH, Land and Water Resources Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1550.

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<p>The equivalent continuum approach uses equivalent propertiesof rock mass as the input data for a continuum analysis. Thisis a common modeling method used in the field of rock mechanicsand hydrogeology. However, there are still unresolvedquestions; how can the equivalent properties be determined andis the equivalent continuum approach suitable for modeling thediscontinuous fractured rock mass.</p><p>The purpose of this paper is to establish a methodology todetermine the equivalent hydraulic and mechanical properties offractured rock masses by explicit representations of stochasticfracture sy

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Min, Ki-Bok. "Fractured Rock Masses as Equivalent Continua - A Numerical Study." Doctoral thesis, KTH, Land and Water Resources Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3742.

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<p>In this thesis, fractured rock masses are treated asequivalent continua for large-scale analyses of rockengineering projects. Systematic developments are made for thedetermination of equivalent mechanical and hydraulic propertiesof fractured rock masses using a hybrid discrete fracturenetwork - distinct element method (DFN-DEM) approach. Thedetermined equivalent properties are then used for a far-fieldfinite element analysis of the thermo-mechanical impacts on thestress, deformation and permeability of fractured rockssurrounding a hypothetical geological repository of nuclearwaste. The geol

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14

Vorfolomeyeva, Yuliya. "Nonlinear static analysis of rubble-stone masonry buildings performed with equivalent frame method." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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Nonlinear static analysis is an efficient tool for performance assessment of masonry structures. In particular, it facilitates the accurate prediction of seismic response of a structure to earthquakes. Numerical models based on Equivalent Frame Method allow to predict realistic failure modes observed after preceding seismic events with reasonable computational effort, a characteristic which is suitable for engineering practice. This thesis deals with nonlinear incremental static (pushover) analysis of masonry buildings and the subsequent discussion of the obtained results. TreMuri software is

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Pitilakis, Dimitris. "Soil-structure interaction modeling using equivalent linear soil behavior in the substructure method." Châtenay-Malabry, Ecole centrale de Paris, 2006. http://www.theses.fr/2006ECAP1067.

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Une procédure numérique, ainsi qu’un code numérique (MISS3D-EqL), est développés pour prendre en compte le comportement nonlinéaire du sol dans l'interaction sol-structure. Le comportement linéaire équivalent est supposé pour le sol, alors que la réponse de la structure et ses effets sur le sol sont correctement pris en considération avec la méthode de sous-structuration dynamique. La procédure proposée est validée par d'autres logiciels numériques et moyens expérimentaux, comme des essais de tables vibrante et centrifugeuse. Les effets du comportement linéaire équivalent du sol sur la réponse

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Ekman, Jonas. "The partial element equivalent circuit method : modeling and experimental verification of PCB structures." Licentiate thesis, Luleå tekniska universitet, EISLAB, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18244.

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To help products comply with international Electromagnetic Compatibility (EMC)regulations or as a help in a design process numerical simulation of electromagnetic (EM) characteristics are a valuable tool. With the development of high-speed computers the complexity of EM simulation programs and the systems they can simulate has increased considerable. But still, problems must be partitioned due to computer resource and/or EM simulation technique limitations. In this thesis, four different EM simulation techniques are described and the nature of these are discussed. The focus is on the partial e

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17

Lau, Mark C. "Small Signal Equivalent Circuit Extraction From A Gallium Arsenide MESFET Device." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/36952.

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The development of microwave Gallium Arsenide Metal Semiconductor Field Effect Transistor (MESFET) devices has enabled the miniaturization of pagers, cellular phones, and other electronic devices. With these MESFET devices comes the need to model them. This thesis extracts a small signal equivalent circuit model from a Gallium Arsenide MESFET device. The approach taken in this thesis is to use measured S- parameters to extract a small signal equivalent circuit model by optimization. Small signal models and S-parameters are explained. The Simplex Method is used to optimize the smal

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18

SANTOS, RODRIGO BIANCHI. "PARAMETRIC OPTIMIZATION OF TRUSS STRUCTURES UNDER DYNAMIC LOADING USING THE EQUIVALENT STATIC LOAD METHOD." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2018. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=35802@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>Otimização estrutural sujeita a carregamentos dinâmicos é um problema desafiador em vários aspectos, a começar pelo grande número de restrições que devem ser atendidas em todos os instantes de tempo. Além disso, o custo computacional para avaliar os gradientes destas restrições é bastante elevado e requer um grande espaço de armazenamento. Na literatura, alguns métodos reduzem o número de restrições avaliando em instantes de tempo selecionado

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19

DiRienzo, Adriano Carleton University Dissertation Engineering Civil and Environmental. "A study of the equivalent frame method of analysis for flat plate building systems." Ottawa, 1995.

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20

Poumarat, Georges. "L'entraînement à l'aide de charges additionnelles." Clermont-Ferrand 2, 1986. http://www.theses.fr/1986CLF21500.

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21

Prinsloo, Etienne Pieter Willem. "Fatigue equivalent static load: Methodology for the design of vehicle structures." Diss., University of Pretoria, 2003. http://hdl.handle.net/2263/25966.

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This study is concerned with the design of vehicle structures through the use of Fatigue Equivalent Static Loads (FESL). A large percentage of failures of mechanical structures can be attributed to fatigue. Furthermore, it is also generally accepted that defective structural design is mostly caused by insufficient knowledge of the input loading. The fatigue loads experienced by vehicle structures are especially difficult to quantify. In the current competitive markets, it is essential to use a pro-active, timely and cost effective process to solve fatigue related problems. The heart of the FES

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22

Nielsen, Adam Derek. "Monte Carlo calculation of fluence-to-ambient dose equivalent conversion coefficients for high-energy neutrons." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16424.

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23

Leinonen, M. (Mikko). "Finite element method and equivalent circuit based design of piezoelectric actuators and energy harvester dynamics." Doctoral thesis, Oulun yliopisto, 2015. http://urn.fi/urn:isbn:9789526208374.

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Abstract The main objective of this thesis was to use and combine Finite Element Method (FEM) and small signal equivalent circuit models in actuator and energy harvesting design and to study the dynamics of the said designs. The work is divided into four different sections. In the first section, the small signal parameters are derived for a pre-stressed piezoelectric actuator using a series of measurements. In addition, the tunability of the resonance frequency using mass and series capacitors is investigated. In the second section, a piezoelectric Fabry Perot Interferometer actuator is simula

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Edwards, Micael Cuin. "A Method for Determining Weight Reduction through Material Substitution in Automotive Structures of Equivalent Stiffness." MSSTATE, 2002. http://sun.library.msstate.edu/ETD-db/theses/available/etd-11302001-165029/.

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The benefits of lighter auto bodies are discussed, and aluminum is compared to steel as an alternative material for auto body construction. The concept of a structural index, lambda, is developed using the simple example of a hollow beam of wall thickness, t, with a cantilever load case. It is shown that the bending stiffness, K, of the beam can be defined as a function of t^lambda, that 1 < lambda < 3, and that lambda can be used to predict the weight savings from material substitution where stiffness is held constant. It is then demonstrated that lambda can be used to predict the weight savi

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Tchorowski, Leo A. "Sparse-Constrained Equivalent Element Distribution Method to Represent Measured Antenna Data in Numerical Electromagnetics Codes." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1582877220383629.

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Ismatullah. "Analysis of space-borne antennas by higher-order method of moments and inverse equivalent current methods." kostenfrei, 2010. https://mediatum2.ub.tum.de/node?id=977261.

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Fabbiani-Leon, Angelique Marie. "Comparison method between gridded and simulated snow water equivalent estimates to in-situ snow sensor readings." Thesis, University of California, Davis, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1604056.

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<p> California Department of Water Resources (DWR) Snow Surveys Section has recently explored the potential use of recently developed hydrologic models to estimate snow water equivalent (SWE) for the Sierra Nevada mountain range. DWR Snow Surveys Section’s initial step is to determine how well these hydrologic models compare to the trusted regression equations, currently used by DWR Snow Surveys Section. A comparison scheme was ultimately developed between estimation measures for SWE by interpreting model results for the Feather River Basin from: a) National Aeronautics and Space Adminis

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Carwile, Zachary Thomas. "Validation of a 3-D Virtual Acoustic Prototyping Method For Use In Structural Design." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/30988.

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Virtual acoustic prototyping (auralization) is the rendering of a virtual sound field that is created from the calculated acoustic response of a modeled structure. Auralization is useful in the design and subjective evaluation of buildings, automobiles, and aircraft. The virtual acoustic prototyping method in this thesis uses finite element modeling (FEM), the equivalent source method (ESM), and head-related transfer functions (HRTFs). A tradeoff exists between the accuracy of the auralization process and the number of equivalent sources (and thus computational power) that are required.

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Wernet, Jack R. "Comparison of the Statically Equivalent Serial Chain Center of Mass Estimation Method to OpenSim's Residual Reduction Algorithm." University of Dayton / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1628009554478147.

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Balling, Lukas. "A Comparison of Optimized Nonlinear Time History Analysis and the Equivalent Lateral Forces Method for Brace Design." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd2086.pdf.

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Sugden, Frank Daniel. "A NOVEL DUAL MODELING METHOD FOR CHARACTERIZING HUMAN NERVE FIBER ACTIVATION." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1318.

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Presented in this work is the investigation and successful illustration of a coupled model of the human nerve fiber. SPICE netlist code was utilized to describe the electrical properties of the human nervous membrane in tandem with COMSOL Multiphysics, a finite element analysis software tool. The initial research concentrated on the utilization of the Hodgkin-Huxley electrical circuit representation of the nerve fiber membrane. Further development of the project identified the need for a linear circuit model that more closely resembled the McNeal linearization model augmented by the work of Sz

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Shrestha, Santosh. "A COMPARATIVE STUDY OF EQUIVALENT LATERAL FORCE METHOD AND RESPONSE SPECTRUM ANALYSIS IN SEISMIC DESIGN OF STRUCTURAL FRAMES." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2561.

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Equivalent Lateral Force Method (ELF) and Response Spectrum Analysis (RSA) are the two most popular methods of seismic design of structures. This study aims to present a comparative study of the two methods using hand-calculated approach as well as computer analysis according to ASCE 7-10 Standards. The two methods have been compared in terms of base shear and story forces by analyzing various models for different number of stories and different support conditions. It was found that ELF gives conservative results in comparison to RSA. This result was more obvious in case of four-story frames.

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Lázaro, Navarro Mario. "The Eigenvalue Problem in Linear Viscoelastic Structures: New Numerical Approaches and the Equivalent Viscous Model." Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/30062.

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El análisis y el control de las vibraciones cobra especial importancia en muchas ramas de la ingeniería, en especial la ingeniería mecánica, civil, aeronáutica y automovilística. Tal es así que prácticamente se identi¿ca como un área independiente dentro del análisis dinámico de estructuras. Desde los comienzos de esta teoría, las fuerzas disipativas o de amortiguamiento han sido uno de los fenómenos más difíciles de modelizar. El modelo viscoso, por su sencillez y versatilidad ha sido y sigue siendo el gran paradigma de los modelos de amortiguamiento. Sin embargo, como consecuencia de la

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Kabiri, Far Bardia. "Application of the Equivalent Static Analysis method to the design of a steel frame structure with added viscous dampers." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10647/.

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All the structures designed by engineers are vulnerable to natural disasters including floods and earthquakes. The energy released during strong ground motions should be dissipated by structural elements. Before 1990’s, this energy was expected to be dissipated through the beams and columns which at the same time were a part of gravity-load-resisting system. However, the main disadvantage of this idea was that gravity-resisting-frame was not repairable. Hence, during 1990’s, the idea of designing passive energy dissipation systems, including dampers, emerged. At the beginning, main proble

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Karaagacli, Taylan. "Determination Of Dynamically Equivalent Fe Models Of Aircraft Structures By Using Modal Test Data." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612522/index.pdf.

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Reliable flutter analysis of aircraft structures is a major requirement to determine safe flight envelops. Dynamically equivalent finite element model of an aircraft structure correlating well with experimental modal is a major requirement for a reliable flutter analysis. Currently available model updating techniques require enormous time and engineering work to achieve appropriate finite element models of aircraft structures. The method developed within the scope of this thesis work aims to remove important disadvantages of common model updating procedures. In doing this, the method starts wi

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Vauchelet, Nicolas. "Modélisation mathématique du transport diffusif de charges partiellement quantiques." Phd thesis, Université Paul Sabatier - Toulouse III, 2006. http://tel.archives-ouvertes.fr/tel-00135114.

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Le travail de la thèse concerne la modélisation et l'analyse <br />mathématique du transport d'électrons confinés dans une nanostructure<br />dans le but d'implémenter des simulations numériques. Dans de tels<br />dispositifs nanométriques, les ordres de grandeurs ne jouent pas le<br />même rôle dans chaque direction. Les électrons peuvent être<br />extrêmement confinés dans une ou plusieurs directions. Un modèle <br />quantique est nécessaire pour décrire le confinement. Dans la<br />direction non confinée, le transport est supposé de nature classique. <br />Nous proposons alors un système co

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Carloni, Federico. "A 3D model based on the SAM Method for seismic studies of masonry buildings." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/17151/.

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L'elaborato propone un metodo per la modellazione tridimensionale di interi edifici in muratura, con lo scopo di valutare le performance sismiche, mediante il programma di calcolo SAP2000. La metodologia proposta consente la modellazione di pareti in muratura simulandone il comportamento non lineare sotto azioni agenti nel piano ed allo stesso tempo permette di considerare la ripartizione delle azioni verticali e soprattutto orizzontali che avviene tra le pareti, dovuta alle zone di connessione, ai solai ed alla loro rigidezza a taglio nel piano. Per lo sviluppo del metodo di modellazione è st

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Genest, Laurent. "Optimisation de forme par gradient en dynamique rapide." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEC022/document.

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Afin de faire face aux nouveaux challenges de l’industrie automobile, les ingénieurs souhaitent appliquer des méthodes d’optimisation à chaque étape du processus de conception. En élargissant l’espace de conception aux paramètres de forme, en augmentant leur nombre et en étendant les plages de variation, de nouveaux verrous sont apparus. C’est le cas de la résistance aux chocs. Avec les temps de calcul long, la non-linéarité, l’instabilité et la dispersion numérique de ce problème de dynamique rapide, la méthode usuellement employée, l’optimisation par plan d’expériences et surfaces de réponse

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DESCLOS, STEPHANE. "Etude et calcul des distributions de courant et de tension sur une croix doublement fendue chargee par des diodes a l'aide d'une methode t. E. M. Calcul de la s. E. R. Equivalente." Rennes 1, 1991. http://www.theses.fr/1991REN10144.

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Cette these est l'etude theorique par une methode d'approximation quasi t. E. M. De doublet filaire et d'antenne plaque en forme de croix doublement fendue chargee par des diodes, a la reception. L'approche numerique est basee principalement sur la modelisation du motif etudie par des lignes de transmission. Cette methode permet de determiner les distributions de tension et de courant sur le motif a partir des conditions aux limites. La connaissance des distributions de courant en module et en phase permet de determiner le champ rerayonne a grande distance et par consequent, les surfaces equiv

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Warneboldt, Iona. "Multiaxial fatigue design of elastomeric parts using Equivalent Fatigue Loads." Electronic Thesis or Diss., Brest, École nationale supérieure de techniques avancées Bretagne, 2022. http://www.theses.fr/2022ENTA0002.

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Trois étapes sont mises en oeuvre ici : la méthode de localisation, la fonction de dommage matériau et le processus de détermination des chargements équivalents en fatigue (CEF). De nombreux essais de fatigue ont été réalisés (415 au total) pour étudier le comportement en fatigue sous chargement multiaxial relaxant et non relaxant sur des éprouvettes de caoutchouc naturel. La durée de vie et les caractéristiques des fissures sont analysées pour finalement introduire un critère de fatigue approprié basé sur le plan critique et permettant de rendre compte de l'effet de déformation moyenne. Ce cr

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Steif, Bassam. "Formulation courants et charges pour la résolution par équations intégrales des équations de l'électromagnétisme." Thesis, Toulouse, INSA, 2012. http://www.theses.fr/2012ISAT0028/document.

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Cette thèse a consisté à élaborer une méthode qui permet de résoudre l’équation intégrale comportant comme inconnues les courants et les charges introduite récemment par Taskinen et Ylä-Oijala par une méthode d’éléments frontière sans aucune contrainte de continuité au niveau des interfaces des éléments aussi bien pour les courants que pour les charges. Nous avons d’abord montré comment on pouvait construire cette équation de façon simple et similaire à celle des formulations intégrales usuelles en imposant au problème intérieur relatif au système de Picard, qui est en fait une extension du sy

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Martinho, Lucas Blattner. "Numerical modeling of electromagnetic coupling phenomena in the vicinities of overhead power transmission lines." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-28062016-152807/.

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Les phénomènes de couplage électromagnétique entre les lignes aé- riennes de transmission d\'énergie et des structures voisines sont inévitables, surtout dans les zones densément peuplées. Les effets indésirables découlants de cette proximité sont variés, allant de l\'établissement des tensions dangereuses à l\'apparition de phénomènes de corrosion dus au courant alternatif. L\'étude de cette classe de problèmes est nécessaire pour assurer la sécurité dans les alentours de la zone d\'interaction et aussi pour préserver l\'intégrité des équipements et des dispositifs présents. Cependant, la mod

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Martinson, Christiaan Adolph. "Characterisation of a PEM electrolyser using the current interrupt method / Christiaan Adolph Martinson." Thesis, North-West University, 2012. http://hdl.handle.net/10394/8741.

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The need to characterise a PEM electrolyser is motivated by a South African hydrogen company. One of two electrochemical characterisation methods, namely the current interrupt method or electrochemical impedance spectroscopy, is investigated to characterise the PEM electrolyser. Various literature sources can be found on the electrochemical characterisation methods. In this study the current interrupt method is used for the electrochemical characterisation of a PEM electrolyser. The current interrupt method is an electrical test method that will be used to obtain an equivalent electric circuit

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Li, Yong-Xiu, and 李永秀. "Equivalent Linear Method using Statistics and Optimization." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/84627999981474239405.

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Pon, Jyun-Jie, and 彭俊傑. "Quantum-Mechanic Simulation using Equivalent-Circuit Method and k-matrix Method." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/43b57c.

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碩士<br>國立中央大學<br>電機工程研究所<br>94<br>In the thesis, we will use two methods to simulate the quantum mechanical systems. The first way is called the k-matrix method, and the other way is the equivalent-circuit method. We use these two methods to analyze periodic KP-model and non-periodic QM systems. The result obtained by these ways is the wave function of the Schrödinger wave equation. Additionally, we will compare the k-matrix method with the equivalent-circuit method and show these results of the k-matrix method are same as the equivalent-circuit method. We will also show the advantages and disa

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Chou, Chang-Yan, and 周長彥. "NURBS-Integrated Contouring Control by Equivalent Errors Method." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/16136282581799963408.

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博士<br>國立中正大學<br>機械工程學系暨研究所<br>102<br>In order to extend the application of the equivalent errors method, this thesis proposes to integrate the developed contouring control algorithm with the NURBS interpolation. This integration can create a contouring procedure from the NURBS code to the corresponding controller. The key of the integration from the parametric form of the NURBS to the analytical (implicit) representation is called “implicitization”. Two methods, Sylvester method and Cayley’s method of the Bezout form, are introduced. The restrictions of the NURBS code which can be applied with

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Liu, Gwo-Hsiung, and 劉國雄. "Application of Geotechnical Engineering in Equivalent Hyperbolic Method." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/44073051697758606995.

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碩士<br>國立中央大學<br>土木工程學系<br>85<br>In geometrical engineer, we must frequently depend on resor -ting different mechanical experiment in order to seek the rela -tion between stress and strain. That is going to estabish ma- terial composes law. The ways most in use are experiment rule. Good materials compose law must possess the fewest material parameters the better, Otherwise, Not only having the more ma -teruak oarameters the more tests what we must do, but also adding to the complicity. T

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Lin, Anne. "A Numerical Evaluation of the Method of Equivalent Nonlinearization." Thesis, 1988. https://thesis.library.caltech.edu/4460/3/lin_a_1988.pdf.

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<p>The Method of Equivalent Nonlinearization, an approach for determining the approximate steady-state probability density function for the random response of nonlinear systems, is evaluated based on numerical simulations.</p> <p>The approach is a natural extension of the well-known Method of Equivalent Linearization, and is based on approximating the original nonlinear system by an equivalent nonlinear system. As such, the approach relies on the existence of exact solutions for the steady-state probability density function of nonlinear systems.</p> <p>The approach is applied to a class

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VISHAM, KUMAR. "NONLINEAR RANDOM VIBRATION ANALYSIS USING TAIL EQUIVALENT LINEARIZATION METHOD." Thesis, 2017. http://dspace.dtu.ac.in:8080/jspui/handle/repository/15995.

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A new non-parametric linearization method for nonlinear random vibration analysis is created. This method works on a discrete representation of the stochastic inputs and the ideas from the first order reliability method (FORM). For a specifiedzresponse thresholdzof theznonlinear system, thezequivalent linearzsystem is characterizedxby matchingzthe "design points" of the linear and nonlinearzresponses in the space of thezstandard normalzvariables acquiredzfrom the discretizationzof thezexcitation. Because of thiszdefinition, the tail probabilityzofzthe linearzsystem is equalzto the firstz

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Kang, Jing-Hao, and 康景皓. "Equivalent Analysis of Machine tools Applied by Finite Element Method and Experimental Modal Method." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/26674626223336262051.

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碩士<br>國立彰化師範大學<br>工業教育與技術學系<br>104<br>In this paper, the research machine type is the Precision Surface Grinding Machine. The Experimental Modal Analysis measure the frequency response function of the whole machine by Spectrum Analyzer, Impact Hammer, and Accelerometer. The Experimental Modal Analysis use ME’SCOPE software to determine the natural frequency, modal shapes and damping factor of machine tool. The Finite Element Analysis research the whole machine, which can explore the natural frequency, mode shapes and the contact rigidity, and then Finite Element Analysis model compare with Exp

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