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Dissertations / Theses on the topic 'Power graph'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Zhang, Jiaxin. "Power-law Graph Cuts." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1418749967.

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2

Antonopoulos, Timos. "Expressive power of graph languages." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611490.

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3

Livesay, Neal. "The Inner Power of a Graph." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2057.

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We define a new graph operation called the inner power of a graph. The construction is similar to the direct power of graphs, except that factors are intertwined in such a way that certain structural properties of graphs are more clearly reflected in their inner powers. We investigate various properties of inner powers, such as connectivity, bipartiteness, and their interaction with the direct product. We explore possible connections between inner powers and the problem of cancellation over the direct product of graphs.

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4

Pedersen, Tom Arne. "Bond Graph Modeling of Marine Power Systems." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-5494.

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Mathematical models for an All Electric Ship component library is developed in this thesis. The main motivation for writing this thesis is to develop a model library that gives the opportunity to simulate both existing and new machinery systems without having to remodel the entire system each time. The model library should support the process of modeling and reuse, and also emphasize openness to brace the modeler during the development and refinement phase. The bond graph approach is good when it comes to physical modeling of systems, it is a good tool for combining different energy domains an

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5

McLaughlin, Adam Thomas. "Power-constrained performance optimization of GPU graph traversal." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50209.

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Graph traversal represents an important class of graph algorithms that is the nucleus of many large scale graph analytics applications. While improving the performance of such algorithms using GPUs has received attention, understanding and managing performance under power constraints has not yet received similar attention. This thesis first explores the power and performance characteristics of breadth first search (BFS) via measurements on a commodity GPU. We utilize this analysis to address the problem of minimizing execution time below a predefined power limit or power cap exposing key rela

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6

Eslamdoost, V. "Bond graph modelling of power electronic switching circuits." Thesis, University of Nottingham, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335287.

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7

Cerda, Jacobo Jaime. "A decentralised graph-based framework for electrical power markets." Thesis, University of Southampton, 2010. https://eprints.soton.ac.uk/161933/.

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One of the main tools used to clear the electrical power market across the world is the DC optimal power flow. Nevertheless, the classical model designed for vertically integrated power systems is now under pressure as new issues such as partial information introduced by the deregulation process, scalability posed by the multiple small renewable generation units as well as microgrids, and markets integration have to be addressed. This dissertation presents a graph-based decentralised framework for the electricity power market based on the DC optimal power flow where Newton's method is solved u

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8

Pennarun, Claire. "Planar graphs : non-aligned drawings, power domination and enumeration of Eulerian orientations." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0609/document.

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Dans cette thèse, nous présentons trois problèmes concernant les graphes planaires.Nous travaillons tout d'abord sur les dessins planaires non-alignés, c'est-à-dire des dessins planaires de graphes sur une grille sans que deux sommets se trouvent sur la même ligne ou la même colonne.Nous caractérisons les graphes planaires possédant un tel dessin sur une grille de taille $n times n$, et nous présentons deux algorithmes générant un dessin planaire non-aligné avec arêtes brisées sur cette grille pour tout graphe planaire, avec $n-3$ ou $min(frac{2n-3}{5},$ $#{text{triangles s{'e}parateurs}}+1)$

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9

Walker, DayVon L. "Power Graphs of Quasigroups." Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7984.

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We investigate power graphs of quasigroups. The power graph of a quasigroup takes the elements of the quasigroup as its vertices, and there is an edge from one element to a second distinct element when the second is a left power of the first. We first compute the power graphs of small quasigroups (up to four elements). Next we describe quasigroups whose power graphs are directed paths, directed cycles, in-stars, out-stars, and empty. We do so by specifying partial Cayley tables, which cannot always be completed in small examples. We then consider sinks in the power graph of a quasigroup,

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10

Samir, Zahirović. "Algebarska i kombinatorna svojstva grafova pridruzenih stepeno-asocijativnim grupoidima." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2020. https://www.cris.uns.ac.rs/record.jsf?recordId=114438&source=NDLTD&language=en.

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Usmereni stepeni graf ~G(G) grupe G uveli su Kelarev i Quinn [37] kao digraf sa skupom cvorova G u kome je x ! y ako je y stepen elementa x, a stepeni graf G(G) je odgovarajuci prost graf, i njega su prvi proucavali Chakrabarty, Ghosh i Sen [17]. Obogaceni stepeni graf G e(G) od G, koji je uveden u [1], je prost graf  sa istim skupom cvorova u kome su dva cvora susedna ako su oba stepeni nekog elementa te grupe.U disertaciji su predstavljeni dokazi iz [12] i [73] da se, za konacnu stepenoasocijativnu lupu G sa inverzima, ~ G(G), G(G) i G e(G) medusobno odreduju. Ovo povlaci da sva tri nav

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11

Bruun, Kristine. "Bond Graph Modelling of Fuel Cells for Marine Power Plants." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-6559.

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There is a constant search for alternative solutions improving the fuel efficiency and environmental impact of marine power plants. Fuel cells are regarded as a potential future candidate for significantly reducing pollution from such systems. In this thesis a bond graph template for mathematical modelling of fuel cells is developed. To show the applicability of this template, models of a solid oxide fuel cell (SOFC) system are implemented and simulations carried out. The models are intended for analyses of marine power production in overall ship system applications. The models developed in th

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12

Serrato, Alexa. "Reed's Conjecture and Cycle-Power Graphs." Scholarship @ Claremont, 2014. http://scholarship.claremont.edu/hmc_theses/59.

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Reed's conjecture is a proposed upper bound for the chromatic number of a graph. Reed's conjecture has already been proven for several families of graphs. In this paper, I show how one of those families of graphs can be extended to include additional graphs and also show that Reed's conjecture holds for a family of graphs known as cycle-power graphs, and also for their complements.

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13

Parast, Vand Hossein. "Power network and smart grids analysis from a graph theoretic perspective." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2021. https://ro.ecu.edu.au/theses/2440.

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The growing size and complexity of power systems has given raise to the use of complex network theory in their modelling, analysis, and synthesis. Though most of the previous studies in this area have focused on distributed control through well established protocols like synchronization and consensus, recently, a few fundamental concepts from graph theory have also been applied, for example in symmetry-based cluster synchronization. Among the existing notions of graph theory, graph symmetry is the focus of this proposal. However, there are other development around some concepts from complex ne

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14

Kohler, Iris. "Graph Theoretical Modelling of Electrical Distribution Grids." DigitalCommons@CalPoly, 2021. https://digitalcommons.calpoly.edu/theses/2301.

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This thesis deals with the applications of graph theory towards the electrical distribution networks that transmit electricity from the generators that produce it and the consumers that use it. Specifically, we establish the substation and bus network as graph theoretical models for this major piece of electrical infrastructure. We also generate substation and bus networks for a wide range of existing data from both synthetic and real grids and show several properties of these graphs, such as density, degeneracy, and planarity. We also motivate future research into the definition of a graph fa

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15

Sörensen, Kristina. "Clustering in Financial Markets : A Network Theory Approach." Thesis, KTH, Optimeringslära och systemteori, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-150577.

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In this thesis we consider graph partition of a particular kind of complex networks referred to as power law graphs. In particular, we focus our analysis on the market graph, constructed from time series of price return on the American stock market. Two different methods originating from clustering analysis in social networks and image segmentation are applied to obtain graph partitions and the results are evaluated in terms of the structure and quality of the partition. Along with the market graph, power law graphs from three different theoretical graph models are considered. This study highl

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16

Di, Natale Anna. "Stochastic models and graph theory for Zipf's law." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/17065/.

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In questo elaborato ci siamo occupati della legge di Zipf sia da un punto di vista applicativo che teorico. Tale legge empirica afferma che il rango in frequenza (RF) delle parole di un testo seguono una legge a potenza con esponente -1. Per quanto riguarda l'approccio teorico abbiamo trattato due classi di modelli in grado di ricreare leggi a potenza nella loro distribuzione di probabilità. In particolare, abbiamo considerato delle generalizzazioni delle urne di Polya e i processi SSR (Sample Space Reducing). Di questi ultimi abbiamo dato una formalizzazione in termini di catene di Markov. I

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17

Lei, Jiansheng. "Using graph theory to resolve state estimator issues faced by deregulated power systems." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1292.

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18

Okuno, Akifumi. "Studies on Neural Network-Based Graph Embedding and Its Extensions." Kyoto University, 2020. http://hdl.handle.net/2433/259075.

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19

Alegria, Linda V. "Radio Number for Fourth Power Paths." CSUSB ScholarWorks, 2014. https://scholarworks.lib.csusb.edu/etd/112.

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A path on n vertices, denoted by Pn, is a simple graph whose vertices can be ordered so that two vertices are adjacent if and only if they are consecutive in the order. A fourth power path, Pn4, is obtained from Pn by adding edges between any two vertices, u and v, whose distance in Pn, denoted by dPn(u,v), is less than or equal to four. The diameter of a graph G, denoted diam(G) is the greatest distance between any two distinct vertices of G. A radio labeling of a graph G is a function f that assigns to each vertex a label from the set {0,1,2,...} such that |f(u)−f(v)| ≥ diam(G)−d(u,v)+1 hold

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20

Donon, Balthazar. "Deep statistical solvers & power systems applications." Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPASG016.

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Confrontés à l'intégration croissante d'énergies renouvelables intermittentes et à de nouveaux mécanismes de marché, les réseaux électriques sont dans une phase de mutation profonde. Ainsi, face à une complexité croissante, RTE, le gestionnaire du réseau de transport d'électricité français, étudie les opportunités offertes par les méthodes issues du Deep Learning. Les changements de topologie (façon dont les lignes sont interconnectées) étant quotidiens, il est essentiel de permettre aux réseaux de neurones de prendre en compte la structure des données, ce qui est rendu possible par l'utilisat

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21

Isapour, Chehardeh Maziar. "AUTOMATIC RECONFIGURATION OF RADIAL DISTRIBUTION NETWORK FOR RELIABILITY ASSESSMENT USING THE CIRCUIT GRAPH." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/dissertations/1572.

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The problem of optimum restoration after occurrence the outages in a distribution network is an important issue in smart grids. In this kind of networks remote-controlled switches, alternative sources and grid-connected distributed generators (DG) are employed. Therefore, the reliability of the system (corresponding to the frequency of failures and the duration of interruptions) is improved by operating the switches to resupply a part of interrupted system during the repair time. To evaluate the reliability indices in smart grids, neglecting the restoration during the repair time causes the wr

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22

Royer, Loic. "Unraveling the Structure and Assessing the Quality of Protein Interaction Networks with Power Graph Analysis." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-62562.

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Molecular biology has entered an era of systematic and automated experimentation. High-throughput techniques have moved biology from small-scale experiments focused on specific genes and proteins to genome and proteome-wide screens. One result of this endeavor is the compilation of complex networks of interacting proteins. Molecular biologists hope to understand life's complex molecular machines by studying these networks. This thesis addresses tree open problems centered upon their analysis and quality assessment. First, we introduce power graph analysis as a novel approach to the represent

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23

Mortada, Maidoun. "The b-chromatic number of regular graphs." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10116.

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Les deux problèmes majeurs considérés dans cette thèse : le b-coloration problème et le graphe emballage problème. 1. Le b-coloration problème : Une coloration des sommets de G s'appelle une b-coloration si chaque classe de couleur contient au moins un sommet qui a un voisin dans toutes les autres classes de couleur. Le nombre b-chromatique b(G) de G est le plus grand entier k pour lequel G a une b-coloration avec k couleurs. EL Sahili et Kouider demandent s'il est vrai que chaque graphe d-régulier G avec le périmètre au moins 5 satisfait b(G) = d + 1. Blidia, Maffray et Zemir ont montré que l

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24

Atkins, David Wayne. "Placing monitoring devices in electric power networks modeled by block graphs." [Johnson City, Tenn. : East Tennessee State University], 2003. http://etd-submit.etsu.edu/etd/theses/available/etd-0713103-210119/unrestricted/AtkinsD080503f.pdf.

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Thesis (M.S.)--East Tennessee State University, 2003.<br>Title from electronic submission form. ETSU ETD database URN: etd-0713103-210119. Includes bibliographical references. Also available via Internet at the UMI web site.

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25

Cheng, Danling. "Integrated System Model Reliability Evaluation and Prediction for Electrical Power Systems: Graph Trace Analysis Based Solutions." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/28944.

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A new approach to the evaluation of the reliability of electrical systems is presented. In this approach a Graph Trace Analysis based approach is applied to integrated system models and reliability analysis. The analysis zones are extended from the traditional power system functional zones. The systems are modeled using containers with iterators, where the iterators manage graph edges and are used to process through the topology of the graph. The analysis provides a means of computationally handling dependent outages and cascading failures. The effects of adverse weather, time-varying loads,

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26

Dhananjaya, Varun. "Approximating Solutions for NANIP-Blackstart." Scholarship @ Claremont, 2019. https://scholarship.claremont.edu/cmc_theses/2017.

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In July 2012, a paper by Gutfraind et al. introduced the neighbor-aided network installation problem, which asks for "a minimal cost ordering of the vertices of a graph, where the cost of visiting a node is a function of the number of neighbors that have already been visited." Additionally, in a 2018 paper by Cummings et al., two greedy heuristics were implemented to estimate solutions to the NANIP-Blackstart problem. This paper will evaluate the performance of the greedy heuristics introduced by Cummings et al., and compare their performance to a new heuristic. In addition to comparing heuris

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27

Raak, Fredrik. "Investigation of Power Grid Islanding Based on Nonlinear Koopman Modes." Thesis, KTH, Elektriska energisystem, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-136834.

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To view the electricity supply in our society as just sockets mountedin our walls with a constant voltage output is far from the truth. Inreality, the power system supplying the electricity or the grid, is themost complex man-made dynamical system there is. It demands severecontrol and safety measures to ensure a reliable supply of electric power.Throughout the world, incidents of widespread power grid failures havebeen continuously reported. The state where electricity delivery to customersis terminated by a disturbance is called a blackout. From a stateof seemingly stable operating condition

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28

Lai, Kexing. "Security Improvement of Power System via Resilience-oriented Planning and Operation." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1556872200222431.

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29

Neuen, Daniel [Verfasser], Martin [Akademischer Betreuer] Grohe, Pascal [Akademischer Betreuer] Schweitzer, and László [Akademischer Betreuer] Babai. "The power of algorithmic approaches to the graph isomorphism problem / Daniel Neuen ; Martin Grohe, Pascal Schweitzer, László Babai." Aachen : Universitätsbibliothek der RWTH Aachen, 2019. http://d-nb.info/1216040826/34.

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30

Tbaileh, Ahmad Anan. "Robust Non-Matrix Based Power Flow Algorithm for Solving Integrated Transmission and Distribution Systems." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/89362.

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This work presents an alternative approach to power system computations, Graph Trace Analysis (GTA), and applies GTA to the power flow problem. A novel power flow algorithm is presented, where GTA traces are used to implement a modified Gauss-Seidel algorithm coupled with a continuation method. GTA is derived from the Generic Programming Paradigm of computer science. It uses topology iterators to move through components in a model and perform calculations. Two advantages that GTA brings are the separation of system equations from component equations and the ability to distribute calculations a

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31

Johansson, Kenny. "Low Complexity and Low Power Bit-Serial Multipliers." Thesis, Linköping University, Department of Electrical Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1751.

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<p>Bit-serial multiplication with a fixed coefficient is commonly used in integrated circuits, such as digital filters and FFTs. These multiplications can be implemented using basic components such as adders, subtractors and D flip-flops. Multiplication with the same coefficient can be implemented in many ways, using different structures. Other studies in this area have focused on how to minimize the number of adders/subtractors, and often assumed that the cost for D flip-flops is neglectable. That simplification has been proved to be far too great, and further not at all necessary. In digital

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32

Karimi, Ahmad Maroof. "DATA SCIENCE AND MACHINE LEARNING TO PREDICT DEGRADATION AND POWER OF PHOTOVOLTAIC SYSTEMS: CONVOLUTIONAL AND SPATIOTEMPORAL GRAPH NEURAL NETWORK." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1601082841477951.

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33

Giscard, Pierre-Louis. "A graph theoretic approach to matrix functions and quantum dynamics." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:ceef15b0-eed2-4615-a9f2-f9efbef470c9.

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Many problems in applied mathematics and physics are formulated most naturally in terms of matrices, and can be solved by computing functions of these matrices. For example, in quantum mechanics, the coherent dynamics of physical systems is described by the matrix exponential of their Hamiltonian. In state of the art experiments, one can now observe such unitary evolution of many-body systems, which is of fundamental interest in the study of many-body quantum phenomena. On the other hand the theoretical simulation of such non-equilibrium many-body dynamics is very challenging. In this thesis,

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34

Holmgren, Åke J. "Quantitative vulnerability analysis of electric power networks." Doctoral thesis, KTH, Transporter och samhällsekonomi, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3969.

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Disturbances in the supply of electric power can have serious implications for everyday life as well as for national (homeland) security. A power outage can be initiated by natural disasters, adverse weather, technical failures, human errors, sabotage, terrorism, and acts of war. The vulnerability of a system is described as a sensitivity to threats and hazards, and is measured by P (Q(t) > q), i.e. the probability of at least one disturbance with negative societal consequences Q larger than some critical value q, during a given period of time (0,t]. The aim of the thesis is to present meth

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35

Balakrishnan, Hemant. "ALGORITHMS FOR DISCOVERING COMMUNITIES IN COMPLEX NETWORKS." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2478.

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It has been observed that real-world random networks like the WWW, Internet, social networks, citation networks, etc., organize themselves into closely-knit groups that are locally dense and globally sparse. These closely-knit groups are termed communities. Nodes within a community are similar in some aspect. For example in a WWW network, communities might consist of web pages that share similar contents. Mining these communities facilitates better understanding of their evolution and topology, and is of great theoretical and commercial significance. Community related research has focused on t

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36

Vai, Vannak. "Planning of low voltage distribution system with integration of PV sources and storage means : case of power system of Cambodia." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT044/document.

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La consommation d'énergie augmente d'année en année en raison de la croissance de la population et des conditions économiques. Afin de répondre aux besoins de la population et de la société d'utiliser l'électricité, le Gouvernement Cambodgien a mis en place la politique de promotion et d'encouragement du développement de l’électrification ; tous les villages auront de l'électricité d'ici 2020 et au moins 70% des domiciles auront accès à la bonne qualité du réseau électrique d'ici 2030. Pour réussir ces objectifs, l'étude et le développement de la méthodologie du réseau de distribution basse te

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Royer, Loic [Verfasser], Michael [Akademischer Betreuer] Schroeder, and Ralf [Gutachter] Zimmer. "Unraveling the Structure and Assessing the Quality of Protein Interaction Networks with Power Graph Analysis / Loic Royer ; Gutachter: Ralf Zimmer ; Betreuer: Michael Schroeder." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://d-nb.info/1150309210/34.

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Ford, Elizabeth. "Barabási-Albert random graphs, scale-free distributions and bounds for approximation through Stein's method." Thesis, University of Oxford, 2009. http://ora.ox.ac.uk/objects/uuid:b1091661-33b5-47fe-912c-61286159904a.

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Barabási-Albert random graph models are a class of evolving random graphs that are frequently used to model social networks with scale-free degree distributions. It has been shown that Barabási-Albert random graph models have asymptotic scale-free degree distributions as the size of the graph tends to infinity. Real world networks, however, have finite size so it is important to know how close the degree distribution of a Barabási-Albert random graph of a given size is to its asymptotic distribution. Stein’s method is chosen as one main method for obtaining explicit bounds for the distance bet

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Sjölund, Rickard, and Nicklas Vedin. "Steering System Modelling for Heavy Duty Vehicles." Thesis, Linköpings universitet, Reglerteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119770.

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Future heavy duty vehicles will be designed and manufactured with improved Advanced Driver Assistance Systems, ADAS. When developing ADAS, an accurate model of the vehicle dynamics greatly simplifies the development process. One element integral to the vehicle lateral dynamics and development of ADAS is the steering system. This thesis aims to develop an accurate model of a heavy duty vehicle steering system suitable for simulations. The input to the system is an input torque at the steering wheel and the output is the wheel angle. Physical models of the system components are developed using b

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40

Jain, Himanshu. "Dynamic Simulation of Power Systems using Three Phase Integrated Transmission and Distribution System Models: Case Study Comparisons with Traditional Analysis Methods." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/74234.

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Solar PV-based distributed generation has increased significantly over the last few years, and the rapid growth is expected to continue in the foreseeable future. As the penetration levels of distributed generation increase, power systems will become increasingly decentralized with bi-directional flow of electricity between the transmission and distribution networks. To manage such decentralized power systems, planners and operators need models that accurately reflect the structure of, and interactions between the transmission and distribution networks. Moreover, algorithms that can simulate t

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41

Chiwewe, Tapiwa Moses. "A distributed topology control technique for low interference and energy efficiency in wireless sensor networks." Diss., University of Pretoria, 2010. http://hdl.handle.net/2263/22800.

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Wireless sensor networks are used in several multi-disciplinary areas covering a wide variety of applications. They provide distributed computing, sensing and communication in a powerful integration of capabilities. They have great long-term economic potential and have the ability to transform our lives. At the same time however, they pose several challenges – mostly as a result of their random deployment and non-renewable energy sources.Among the most important issues in wireless sensor networks are energy efficiency and radio interference. Topology control plays an important role in the desi

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42

Fu, Jian. "Prototypage virtuel incrémental des actionneurs électromécanique pour la synchronisation en position." Thesis, Toulouse, INSA, 2016. http://www.theses.fr/2016ISAT0008/document.

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Dans le domaine de l'aéronautique, les concepts basés sur l’usage étendu de l'électricité dans les aéronefs plus électriques (MEA) et même tout électriques (AEA) font appel à des actionneurs électromécaniques (EMA) en replacement des actionneurs servo-hydrauliques conventionnels (HSA). Lorsque les EMA sont utilisés pour des applications d'actionnement critique comme les commandes de vol, certains problèmes spécifiques liés à l’équilibre thermique, l'inertie réfléchie, le mouvement parasite dû aux élasticités structurelles, la réponse aux fautes (grippage et rupture) et la synchronisation d’EMA

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Rocha, Clarissa Argenti. "Método de coordenação e seletividade de fusíveis e religadores para redes de distribuição de energia." Universidade do Vale do Rio dos Sinos, 2018. http://www.repositorio.jesuita.org.br/handle/UNISINOS/7455.

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Submitted by JOSIANE SANTOS DE OLIVEIRA (josianeso) on 2018-12-13T12:38:00Z No. of bitstreams: 1 Clarissa Argenti Rocha_.pdf: 2812629 bytes, checksum: 71ffc1d81a1b5a7e4e8e3d80481d872b (MD5)<br>Made available in DSpace on 2018-12-13T12:38:00Z (GMT). No. of bitstreams: 1 Clarissa Argenti Rocha_.pdf: 2812629 bytes, checksum: 71ffc1d81a1b5a7e4e8e3d80481d872b (MD5) Previous issue date: 2018-08-31<br>Nenhuma<br>As redes atuais de distribuição são cada vez mais exigidas quanto a sua confiabilidade, as concessionárias precisam atender os critérios dos indicadores de qualidade individual. Para al

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Kukuczka, Adam. "Využití Bondových grafů pro modelování elektrických strojů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217638.

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Tato diplomová práce pojednává o možnostech simulace a modelování elektrických pohonů na základě Bondových grafů. Je zde uvedena základní teorie k problematice. V práci jsou představeny modely stejnosměrného a synchronního stroje sestavené touto technikou. Dále je zde seznámení s Freeware knihovnou Bondových grafů BG V2.1 k programu MATLABSimulink. Za pomocí této knihovny byly sestaveny oba modely strojů. V poslední kapitole je uvedeno srovnání modelování na základě teorie Bondových grafů s modelováním v blokových diagramech.

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Fleury, Benoît. "Comportement des supercondensateurs en environnement sévère et conception optimale d’alimentations hybrides embarquées aérospatiales." Thesis, Ecole centrale de Lille, 2013. http://www.theses.fr/2013ECLI0004/document.

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L’objectif de cette étude est de développer une alimentation multisources exploitant la complémentarité batterie/supercondensateurs pour gagner en masse sur le stockage de l’énergie électrique embarquée à bord des aéronefs et des véhicules spatiaux. L’étude se déroule en trois parties :Dans la première partie, un outil d’aide à la décision permettant développer une alimentation hybride pour une application donnée est présenté. Cet outil a pour but d’estimer la masse optimale d’une alimentation hybride à partir des seules informations d’énergies spécifiques et puissances spécifiques des sources

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Pokrovskiy, Alexey. "Graph powers, partitions, and other extremal problems." Thesis, London School of Economics and Political Science (University of London), 2013. http://etheses.lse.ac.uk/754/.

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Graph theory is the study of networks of objects (called vertices) joined by links (called edges). Since many real world problems can be represented by a graph, graph theory has applications in areas such as sociology, chemistry, and computing. In this thesis, a number of open problems in graph theory are studied.

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Sanchez, Roberto. "Application des Bond graphs à la modélisation et à la commande de réseaux électriques à structure variable." Phd thesis, Ecole Centrale de Lille, 2010. http://tel.archives-ouvertes.fr/tel-00690633.

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Cette thèse étudie les problèmes liés à l'association des principaux composants des réseaux électriques.La nature inductive des éléments à connecter pose des problèmes lors de leur association dans un nœud de connexion commun. Deux solutions sont proposées pour résoudre ce problème et rendre ainsi possible la simulation. Une première solution accepte la présence de causalités dérivées, la deuxième consiste à simplifier les modèles en supprimant localement les régimes dynamiques pour faciliter leur association.La mise en évidence graphique de la causalité dans le modèle global d'un micro réseau

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Mota, Alexandre de Assis. "Metodologia computacional para avaliação da qualidade de planos de recomposição de sistemas de energia eletrica." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261251.

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Orientador: Andre Luiz Morelato França<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-04T08:13:24Z (GMT). No. of bitstreams: 1 Mota_AlexandredeAssis_D.pdf: 2550000 bytes, checksum: d1b87870a85e6720b234c4e11cce99a8 (MD5) Previous issue date: 2005<br>Resumo: O sucesso da recomposição de sistemas interligados está diretamente associado à qualidade dos planos de recomposição. Esses planos descrevem as seqüências de ações de controle que devem ser tomadas para energizar as diferentes áreas geoelétri

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Morel, Hervé. "Modélisation et simulation des composants et des systèmes électroniques de puissance." Habilitation à diriger des recherches, INSA de Lyon, 1994. http://tel.archives-ouvertes.fr/tel-00731059.

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La modélisation des composants à semiconducteur est un grand classique. Dans ce travail, outre un rappel de l'état de l'art, la modélisation des composants à semiconducteur de puissance est abordée par l'approche des graphes de liens. Les graphes de liens fournissent une représentation unifiée de la dynamique des systèmes. Cette approche multiphysique impose une représentation explicite des transferts d'énergie qui confère à cette méthode une grande généricité. De plus l'analyse de causalité associée, permet de retrouver par exemple les règles d'association des composants de puissance, bien co

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Doan, Le Anh. "Du micro véhicule aérien au nano véhicule aérien : études théoriques et expérimentales sur un insecte artificiel à ailes battantes." Thesis, Valenciennes, 2019. http://www.theses.fr/2019VALE0004/document.

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Au cours des dernières décennies, la possibilité d’exploiter les capacités de vol exceptionnelles des insectes a été à l’origine de nombreuses recherches sur l’élaboration de nano-véhicules aériens (NAVs) à ailes battantes. Cependant, lors de la conception de tels prototypes, les chercheurs doivent analyser une vaste gamme de solutions liées à la grande diversité des insectes volants pour identifier les fonctionnalités et les paramètres adaptés à leurs besoins. Afin d’alléger cette tâche, le but de ce travail est de développer un outil permettant à la fois d’examiner le comportement cinématiqu

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