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Dissertations / Theses on the topic 'Transmission line method (TLM)'

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Published: 5 June 2025

Last updated: 2 August 2025

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1

Elkalsh, Ahmed. "Coupled electro-thermal transmission line modelling (TLM) method." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/40661/.

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The theme of this thesis is concerned with the modelling of the multi-physics interactions that occur in lightning and arc discharge. The main contributions of this research are presented as combining different physical studies namely, electromagnetic (EM) propagation, thermal diffusion and non-linear materials using a numerical algorithm. The algorithm was developed based on the two dimensional (2D) numerical transmission line method (TLM). The algorithm was applied to several practical examples namely, to model the electro-thermal analysis and the temperature development in a plasmonic nano-

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2

Rebel, Jürgen N. "On the foundations of the transmission line matrix method." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=959770089.

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3

Johns, David Philip. "A three-dimensional frequency-domain transmission-line modelling method." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318645.

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4

Chen, Zhizhang. "The transmission line matrix (TLM) method and its boundary treatments." Thesis, University of Ottawa (Canada), 1992. http://hdl.handle.net/10393/10888.

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The Transmission Line Matrix (TLM) numerical algorithm, based on the discrete Huygens' principle, has been extensively used to solve electromagnetic structure problems. The major advantage of this method is its simplicity and flexibility as the vectorial Maxwell's Equations are transformed into a simple numerical model of digital signal processing system. In this thesis, new and efficient numerical modeling concepts and procedures have been developed for the analysis of electromagnetic structures with the TLM method: (1) With the introduction of the equivalent field quantities defined between

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5

Stubbs, David Michael. "Modelling distributed amplifier structures using the transmission line matrix (TLM) method." Thesis, University of Hull, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395515.

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6

Hurst, Alfred Ian. "TLM modelling of the thermal experience of vitreous china ware during firing in a tunnel kiln." Thesis, University of Hull, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314119.

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7

Li, Qiyang. "New developments of absorbing boundary algorithm for the transmission line matrix (TLM) method." Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6697.

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New developments of Absorbing Boundary (AB) Algorithms for the Transmission Line Matrix (TLM) Method have been presented in this thesis. A new approach has been proposed to obtain the optimized Dissipation Absorbing Boundary Condition (ABC). In this approach, optimization is performed directly on the structure being studied. This approach has been implemented in 2D and 3D TLM. It shows its great advantage especially in 3D because it is unconditionally stable while many other approaches such as extrapolation approach, are unstable. Great efforts have also been made in implementing Liao's ABC in

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8

De, Menezes Leonardo Rodrigues Araujo Xavier. "Modeling of general medium constitutive relationships in the transmission line matrix method (TLM)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq21929.pdf.

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9

Ferreira, Golberi de Salvador. "Modelagem numérica de problemas de compatibilidade eletromagnética utilizando TLM (Transmission-line Modeling Method) /." Florianópolis, SC, 1999. http://repositorio.ufsc.br/xmlui/handle/123456789/81262.

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Tese (Doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico.<br>Made available in DSpace on 2012-10-19T00:59:24Z (GMT). No. of bitstreams: 0Bitstream added on 2016-01-09T01:28:22Z : No. of bitstreams: 1 142815.pdf: 18481841 bytes, checksum: 919a3cc7e2edeeb193092fc5fab4781c (MD5)

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10

Yagli, Ahmet Fazil. "Electromagnetic scattering from three dimensional gyrotropic objects using the Transmission Line Modeling (TLM) method." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2006. http://proquest.umi.com/login?COPT=REJTPTU0NWQmSU5UPTAmVkVSPTI=&clientId=3739.

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11

Erkut, Huseyin H. "Electromagnetic scattering from three dimensional chiral objects using the transmission line modeling (TLM) method." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2006. http://proquest.umi.com/login?COPT=REJTPTU0NWQmSU5UPTAmVkVSPTI=&clientId=3739.

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12

Zhang, Guangrong. "The applications of transmission line matrix (TLM) method to the modelling of airborne ultrasonics." Thesis, University of Nottingham, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357838.

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13

Browne, Daniel R. "Application of multi-core and cluster computing to the Transmission Line Matrix method." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/14984.

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The Transmission Line Matrix (TLM) method is an existing and established mathematical method for conducting computational electromagnetic (CEM) simulations. TLM models Maxwell s equations by discretising the contiguous nature of an environment and its contents into individual small-scale elements and it is a computationally intensive process. This thesis focusses on parallel processing optimisations to the TLM method when considering the opposing ends of the contemporary computing hardware spectrum, namely large-scale computing systems versus small-scale mobile computing devices. Theoretical a

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14

Moniri-Ardakani, Seyed-M. "Application of Transmission Line Matrix (TLM) method to integrated optical lossless/lossy multilayer slab and channel waveguides." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/14866.

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15

Heleno, Evandro Fernandes. "Avaliação de câmaras reverberantes através do método numérico TLM." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-01122006-121507/.

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O presente trabalho tem por objetivo avaliar o comportamento dos campos eletromagnéticos no interior de câmaras reverberantes de modos misturados através do método numérico TLM (Transmission Line Matrix). Inicialmente, apresenta-se uma descrição dos diversos tipos de câmaras aplicáveis na avaliação de desempenho de compatibilidade eletromagnética de equipamentos e sistemas elétricos, destacando-se suas principais características físicas e geométricas, com ênfase nas câmaras reverberantes. Os aspectos teóricos relacionados à descrição do método TLM são detalhados e sua aplicação na avaliação do

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16

Aldabbagh, Ahmed. "Hybrid electric and thermal modelling of semiconductor devices using the transmission line matrix (TLM) methods." Thesis, De Montfort University, 2014. http://hdl.handle.net/2086/10484.

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Increasing the level of semiconductor devices' quality, reliability, and associated system safety is important as a fundamental contributor to overall technical advancement in the electronics sector. However, the growing requirements of optimizing device design for the broadest application areas need an enhanced level of understanding of thermal behaviour, and self-heating in particular, of semiconductor devices under harsh thermal operation conditions. The aim of the research presented in this thesis is to develop and verify a numerical tool to assist in the understanding and the prediction o

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17

Dalla'Rosa, Alexandre. "Modélisation et optimisation de la localisation d'émetteurs dans des systèmes de communication sans fil." Paris 11, 2007. http://www.theses.fr/2007PA112299.

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Durant les dernières décennies, l’évolution technologique associée aux systèmes de communication sans fil induit une augmentation significative des niveaux des signaux électromagnétiques dans l'environnement. Quand ces niveaux sont élevés, ils peuvent causer la défaillance et/ou le mauvais fonctionnement de composants électroniques, causant ainsi un problème de compatibilité électromagnétique (CEM). L’évolution des systèmes de transmission sans fil et des perturbations associées en environnement indoor oblige à se doter d’outils électromagnétiques permettant la caractérisation du canal de prop

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18

Gazzana, Daniel da Silva. "Contribuição ao estudo de análise de aterramento impulsivo e em altas frequências associado à avaliação da suportabilidade dos seres humanos com base no método da modelagem por linhas de transmissão (TLM)." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/70922.

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Este trabalho fundamenta-se no desenvolvimento e aprimoramento de metodologias para a melhor representação do aterramento elétrico sob uma análise transiente. O estudo concentrase no estabelecimento de contribuições ao estado da arte associadas à análise e modelagem de aterramento impulsivo e em altas frequências. O estudo vincula-se também à avaliação da suportabilidade de seres humanos submetidos a potenciais produzidos na superfície do solo, provenientes da corrente elétrica gerada por um surto atmosférico. A concepção das metodologias propostas baseou-se no uso do Método da Modelagem por L

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19

Chen, Dian. "Transmission line modelling (TLM) of physical systems." Thesis, University of Sheffield, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361632.

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20

Meliani, H. "Mesh generation in TLM." Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381077.

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21

Ahmadian, Mansour. "Transmission Line Matrix (TLM) modelling of medical ultrasound." Thesis, University of Edinburgh, 2001. http://hdl.handle.net/1842/427.

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This thesis introduces TLM as a new method for modelling medical ultrasound wave propagation. Basic TLM theory is presented and how TLM is related to Huygens principle is discussed. Two dimensional TLM modelling is explained in detail and one dimensional and three dimensional TLM modelling are explained. Implementing TLM in single CPU computers and parallel computers is discussed and several algorithms are presented together with their advantages and disadvantages. Inverse TLM and modelling non linear wave propagation and different types of mesh are discussed. A new idea for modelling TLM as a

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22

Witwit, Abdul-Mehdi Rahim Mohammed. "Meshing techniques for TLM diffusion problems." Thesis, University of Hull, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296281.

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23

Paul, John. "Modelling of general electromagnetic material properties in TLM." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267589.

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24

Burton, James D. "Parallel simulation of hydraulic systems using transmission-line modelling (TLM)." Thesis, University of Bath, 1994. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387215.

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25

Jaques, Stuart Roland. "A TLM analysis of an all-optical switching device." Thesis, University of Hull, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363266.

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26

Austin, John Dawson. "General curvilinear orthogonal meshes for use in TLM diffusion applications." Thesis, University of Hull, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335178.

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27

Sasse, Hugh Granville. "Enhancing numerical modelling efficiency for electromagnetic simulation of physical layer components." Thesis, De Montfort University, 2010. http://hdl.handle.net/2086/4406.

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The purpose of this thesis is to present solutions to overcome several key difficulties that limit the application of numerical modelling in communication cable design and analysis. In particular, specific limiting factors are that simulations are time consuming, and the process of comparison requires skill and is poorly defined and understood. When much of the process of design consists of optimisation of performance within a well defined domain, the use of artificial intelligence techniques may reduce or remove the need for human interaction in the design process. The automation of human pro

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28

Koay, Adeline Lay Kuen. "Transmission line matrix (TLM) based thermal management and control of spatially distributed systems." Thesis, University of Hull, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417159.

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29

Barlabé, i. Dalmau Antoni. "Anàlisi de discontinuïtats finline." Doctoral thesis, Universitat Politècnica de Catalunya, 1996. http://hdl.handle.net/10803/6936.

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En esta tesis se han desarrollado los siguientes métodos numéricos para el análisis de estructuras planares, especialmente finline, en la banda de microondas y ondas milimétricas: <br/>-el método de las líneas con discretizacion uniforme y no uniforme.<br/> -el método de los elementos finitos aplicado al análisis de guías homogéneas e inhomogeneas.<br/> -el método de la matriz de lineas de transmisión tridimensional. <br/>-el método de la matriz se generalizada para el análisis de estructuras uniformes y discontinuidades planares. <br/>-el método del dominio espectral para el análisis de estru

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30

Batty, Eric Richard. "A novel transmission line monitoring method." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326654.

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31

Flint, James Alan. "Efficient automotive electromagnetic modelling." Thesis, Loughborough University, 2000. https://dspace.lboro.ac.uk/2134/33758.

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The Transmission Line Modelling (TLM) method is applied to the electromagnetic modelling of vehicles. Implications of increasing frequencies in computer models of electromagnetic compatibility (EMC) studies are discussed. Efficient algorithms and resource management strategies are developed With a view to producing accurate results m a realistic computational run time. Theoretical aspects covered are: (1) the development and accuracy of the TLM method; (2) an improved Partial Huygens' surface for plane wave excitation; (3) an evaluation of high-performance local and global absorbing boundary c

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32

El-Masri, Samir D. "Application de la méthode numérique TLM (transmission line matrix) aux ondes acoustiques et à la parole." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0129.

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La plupart des theories actuelles sur la propagation des ondes acoustiques dans le conduit vocal se basent sur le principe des ondes planes (unidimensionnelles) et ne sont valables qu'aux basses frequences. Compte tenu de la difficulte posee par l'etude theorique ou experimentale des ondes acoustiques aux frequences elevees et dans des structures complexes telles que le conduit vocal, les methodes de simulation numerique sont particulierement utiles. La methode numerique tlm (transmission line matrix) a ete developpee initialement pour la simulation de la propagation des ondes electromagnetiqu

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33

Benmohamed, Fayçal. "Contribution au développement d'une méthode numérique pour étudier des structures planaires hyperfréquences." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSES004.

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Le travail proposé est le résultat d’une collaboration entre le laboratoire Physique de la matière condensée et nanosciences de Monastir, le laboratoire Laplace de Toulouse et le laboratoire Hubert Curien de Saint-Étienne. Il s’inscrit dans un projet visant à étudier théoriquement la propagation des ondes électromagnétiques dans des dispositifs passifs à base du matériau magnétique anisotrope. La présence d’une couche magnétique dans telle structure a de nombreux avantages : non réciprocité́, performances intéressantes, isolation importante, …Plus précisément, c’est la fabrication des disp

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34

Boston, Ian Edward. "Transient stress analysis by the transmission line method." Thesis, University of Hull, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259799.

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35

Kim, Sangwoo. "Multiconductor transmission line analysis using surface ribbon method /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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36

Keen, Alan G. "Planar transmission line analyses using the Method of Lines." Thesis, University of Kent, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293993.

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37

Lahmar, Mustafa. "ESTIMATION OF TRANSMISSION LINE PARAMETERS USING LINEAR METHOD WITH SYNCHRONIZED AND UNSYNCHRONIZED DATA." UKnowledge, 2019. https://uknowledge.uky.edu/ece_etds/135.

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Accurate value of transmission line parameters is important for power system protection applications, especially for distance relays whose zone settings are based on positive sequence line impedance. The research is devoted to estimating transmission line positive-sequence parameters from synchronized or unsynchronized measurements of voltage and current phasors that are obtained at both terminals of the line. The positive sequence parameters including series impedance and shunt admittance can be linearly estimated. The linear least square algorithm has been derived in this dissertation for di

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38

Choong, Yew Kwan. "Advanced modal expansion techniques for the transmission line modelling method." Thesis, University of Nottingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403698.

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39

Meng, Xuesong. "Modelling multi-scale problems in the transmission line modelling method." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/14461/.

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Modern electromagnetic problems are becoming increasingly complex and their simulation must take into account geometrical features that are both large and small compared to the wavelength of interest. These multi-scale problems lead to a heavy computational burden in a discretised computational simulation approach since the small features require fine mesh to be used in the simulation, resulting in large run time and memory storage. To overcome such problems, this thesis presents an efficient and versatile method for embedding small features into an otherwise coarse mesh. The embedded model el

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40

Basl, Peter A. W. Bakr Mohamed H. Nikolova Natalia K. "An adjoint variable method for time-domain transmission line modeling." *McMaster only, 2007.

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41

Herring, Jonathan L. "Developments in the transmission-line modelling method for electromagnetic compatibility studies." Thesis, University of Nottingham, 1993. http://eprints.nottingham.ac.uk/27911/.

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The transmission-line modelling (TLM) method is applied to 3-dimensional problems in electromagnetic compatibility (EMC). The method is found to be a versatile tool which is ideally suited to the modelling of many EMC systems. A new way of deriving the scattering properties of the TLM node is presented and the derivation of mesh parameters, the application of boundary conditions and methods of applying excitation and of taking outputs are described. Issues regarding the efficient implementation of the TLM algorithm and a way of running very large simulations are reported. A multigrid method is

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42

Carvalho, Júnior Carlos Alberto Tenório de. "Desenvolvimento de uma nova ferramenta CAD para o estudo de compatibilidade eletromagnética usando Transmission-Line Matrix - John’s Super Node (TLM-JSN)." reponame:Repositório Institucional da UnB, 2006. http://repositorio.unb.br/handle/10482/6901.

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Tese (doutorado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2006.<br>Submitted by Thaíza da Silva Santos (thaiza28@hotmail.com) on 2011-02-11T01:23:35Z No. of bitstreams: 1 2006_CarlosAlbertoTenorioCarvalhoJunior.pdf: 2629276 bytes, checksum: bcaf33b03adf4a0a77745682f35bcf90 (MD5)<br>Approved for entry into archive by Daniel Ribeiro(daniel@bce.unb.br) on 2011-02-16T01:04:02Z (GMT) No. of bitstreams: 1 2006_CarlosAlbertoTenorioCarvalhoJunior.pdf: 2629276 bytes, checksum: bcaf33b03adf4a0a77745682f35bcf90 (MD5)<br>Made available in DSpace on 2011-02

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Lowe, Bradley Shayne. "A New Method of Determining the Transmission Line Parameters of an Untransposed Line using Synchrophasor Measurements." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/56607.

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Transmission line parameters play a significant role in a variety of power system applications. The accuracy of these parameters is of paramount importance. Traditional methods of determining transmission line parameters must take a large number of factors into consideration. It is difficult and in most cases impractical to include every possible factor when calculating parameter values. A modern approach to the parameter identification problem is an online method by which the parameter values are calculated using synchronized voltage and current measurements from both ends of a transmission l

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Scott, Ian. "Developments in time-reversal of electromagnetic fields using the transmission-line modelling method." Thesis, University of Nottingham, 2010. http://eprints.nottingham.ac.uk/11189/.

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Inverse modelling methods are receiving significant interest, due to their simplicity and ease of use in the design of modern microwave components. This study investigates and further develops the technique of numerical time-reversal, in the context of automated component design, for modelling metal waveguide devices. The thesis demonstrates that time-reversal methods suffer from temporal truncation, evanescent wave decay and significant computational resource requirements and will investigate different methods to solve these problems. In order to reduce the runtime, the use of Prony’s method

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Stothard, David. "The development of an application specific processor for the transmission line matrix method." Thesis, Loughborough University, 2000. https://dspace.lboro.ac.uk/2134/14899.

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This thesis details the development of an application specific processor for the transmission line matrix (TLM) method. The application of TLM to the modelling of wave propagation in two and three dimensions is introduced with the discussion focusing on the concept of computational efficiency. Methods for improving computational efficiency are reviewed, in particular the implementation of TLM on large scale parallel computers. It is shown that these methods, while increasing throughput, make inefficient use of available resources. The review of existing methods is used to define a set of goals

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46

Attari, Amir Reza. "Analysis of interference in high frequency circuits using the transmission line matrix method." Université Joseph Fourier (Grenoble), 2002. http://www.theses.fr/2002GRE10056.

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Dans la compatibilité électromagnétique (CEM) l'analyse des interférences est très importante. Plusieurs progrès technologiques tels que les processeurs ultrarapides et le packaging à faible coût ont contribué à l'importance de cette analyse. La recherche réalisée ici établit une méthode hybride efficace pour l'analyse des interférences. Cette méthode hybride est basée sur la méthode TLM (transmission line matrix) et la formulation des équations intégrales dans le domaine temporel. La démarche employée dans l'étude est la suivante: La méthode TLM est utilisée pour analyser chaque circuit sépar

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47

Bajracharya, Sanjay. "Characterization and modeling of multi-conductor transmission line using Finite-difference Time-Domain method." FIU Digital Commons, 1996. http://digitalcommons.fiu.edu/etd/1372.

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A two-dimensional, 2D, finite-difference time-domain (FDTD) method is used to analyze two different models of multi-conductor transmission lines (MTL). The first model is a two-conductor MTL and the second is a threeconductor MTL. Apart from the MTL's, a three-dimensional, 3D, FDTD method is used to analyze a three-patch microstrip parasitic array. While the MTL analysis is entirely in time-domain, the microstrip parasitic array is a study of scattering parameter Sn in the frequency-domain. The results clearly indicate that FDTD is an efficient and accurate tool to model and analyze multicondu

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48

Partridge, Gordon John. "An investigation into the application of the transmission line modelling method to mechanical stress systems." Thesis, University of Nottingham, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328395.

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49

Alexandru, Mihai. "Efficient large electromagnetic simulation based on hybrid TLM and modal approach on grid computing and supercomputer." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2012. http://tel.archives-ouvertes.fr/tel-00797061.

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Dans le contexte des Sciences de l'Information et de la Technologie, un des challenges est de créer des systèmes de plus en plus petits embarquant de plus en plus d'intelligence au niveau matériel et logiciel avec des architectures communicantes de plus en plus complexes. Ceci nécessite des méthodologies robustes de conception afin de réduire le cycle de développement et la phase de prototypage. Ainsi, la conception et l'optimisation de la couche physique de communication est primordiale. La complexité de ces systèmes rend difficile leur optimisation notamment à cause de l'explosion du nombre

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50

Mazloom, Ziya. "Multi-conductor transmission line model for electrified railways: A method for including responses of lumped devices." Doctoral thesis, KTH, Elektroteknisk teori och konstruktion, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11964.

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For studying the response to transients caused by lightning and other electromagnetic disturbance sources, electrified railway systems can be represented as a system of multiconductor transmission lines (MTL) above a finitely conducting ground. The conductors present in this system would be wires for traction power supply, auxiliary power, return conductors for traction current, the tracks, and finitely conducting ground. In contrast to conventional power systems, where the MTL system is usually only terminated at the line ends, there are lumped devices connected in series and as shunt along t

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