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Dissertations / Theses on the topic 'Dynamic modeling and simulations'

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Published: 4 June 2021

Last updated: 6 February 2022

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1

Colella, Vanessa Stevens. "Participatory simulations : building collaborative understanding through immersive dynamic modeling." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/61099.

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2

VISCONTI, IGOR FERREIRA. "MEASUREMENT-BASED LOAD MODELING FOR DYNAMIC SIMULATIONS ON ELECTRIC POWER SYSTEMS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2010. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=16417@1.

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CENTRO DE PESQUISA DE ENERGIA ELÉTRICA<br>Este trabalho descreve uma metodologia para modelagem de cargas elétricas, utilizando dados de tensão e corrente registrados durante distúrbios no sistema de potência. Estes modelos são utilizados na representação de subsistemas da rede elétrica em simulações computacionais que preveem o comportamento dinâmico do sistema de potência após perturbações em suas condições normais de operação.São apresentados resultados práticos da metodologia proposta, onde a carga é definida como um sistema cuja saída é a variação da potência consumida e a entrada é a var

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3

Li, Tianyi. "Gradient-damage modeling of dynamic brittle fracture : variational principles and numerical simulations." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX042/document.

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Une bonne tenue mécanique des structures du génie civil en béton armé sous chargements dynamiques sévères est primordiale pour la sécurité et nécessite une évaluation précise de leur comportement en présence de propagation dynamique de fissures. Dans ce travail, on se focalise sur la modélisation constitutive du béton assimilé à un matériau élastique-fragile endommageable. La localisation des déformations sera régie par un modèle d'endommagement à gradient où un champ scalaire réalise une description régularisée des phénomènes de rupture dynamique. La contribution de cette étude est à la fois

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4

Akkinapragada, Nagasmitha. "Dynamic modeling and simulations of solid oxide fuel cells for grid-tied applications." Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.umr.edu/thesis/pdf/final_copy1_09007dcc8031997c.pdf.

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Thesis (M.S.)--University of Missouri--Rolla, 2007.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed April 17, 2007) Includes bibliographical references (p. 77-80).

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5

Endale, Turie Samson. "Gas Turbine Plant Modeling for Dynamic Simulation." Thesis, KTH, Kraft- och värmeteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-93897.

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Gas turbines have become effective in industrial applications for electric and thermal energy production partly due to their quick response to load variations. A gas turbine power plant is a complex assembly of a varietyof components that are designed on the basis of aero thermodynamiclaws. This thesis work presents model development of a single-shaft gas turbine plant cycle that can operate at wide range of load settings in complete dynamic GTP simulator. The modeling and simulation has been done in Dymola 7.3, based on the Modelica programming language. The gas turbine plant model is develop

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6

Engström, Jesper, Elias Richloow, and Anders Wickström. "Modeling of Robotic Hand for Dynamic Simulation." Thesis, KTH, Maskinkonstruktion (Inst.), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171991.

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KTHand is a robot hand designed within a doctoral thesis by Johan Tegin. KTHand is meant to be a simple construction, able to be produced for a low cost but still be functional thanks to feedback from tactile and position sensors. The mechanical construction of KTHand is based on three identical fingers, corresponding index finger, middle finger, and a thumb. Each finger consists of three movable links, called phalanges, connected by a leaf spring on the top. For the force actuation, a fishing line acting as a tendon is running through ducts in the phalanges. Each tendon is powered by a direct

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7

Cooke, Joseph M. "NPSNET : flight simulation dynamic modeling using quaternions." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/27165.

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The Naval Postgraduate School (NPS) has actively explored the design and implementation of networked, realtime, three-dimensional battlefield simulations on low cost, commercially available graphics workstations. The most recent system, NPSNET, has improved in functionality to such an extent, that it is considered a low cost version of the Defense Advanced Research Project Agency's (DARPA) SIMNET system. In order to reach that level, it was necessary to economize in certain areas of the code so that real time performance occurred at an acceptable level. One of those areas was in aircraft dynam

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8

Harrell, Anthony F. "Molecular dynamic modeling and simulation for polymers." Thesis, Monterey, California. Naval Postgraduate School, 2012.

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Approved for public release; distribution in unlimited.<br>Polymers have been widely used in various engineering applications. For more than a quarter century, the materials have been utilized intensively for the binding materials for composites. The material properties of the binding materials called matrix materials play an important role for the composite material behaviors. As a result, the objective of this study was to understand the mechanical properties of polymers. In particular, the goal was to develop insights as to how a molecular level structure is connected to the bulk properties

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9

Harrell, Anthony F. "Molecular dynamic modeling and simulation for polymers /." [United States] : Storming Media, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03sep%5FHarrell.pdf.

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10

Nordbeck, Patric C. "Dynamics of Affordance Actualization." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504881864634251.

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11

Schmeißer, Andre [Verfasser]. "Contact Modeling Algorithms for Fiber Dynamics Simulations / Andre Schmeißer." München : Verlag Dr. Hut, 2016. http://d-nb.info/1115549960/34.

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12

Chakraborty, Sanjib. "Dynamic Modeling and Simulation of Digital Displacement Machine." Thesis, Linköpings universitet, Fluida och mekatroniska system, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-85277.

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Improved efficiency, better controllability and low noise are the most demanding features form a displacement machine now-a-days. Most of the conventional displacement machines are basically a reciprocating pumping element controlled by valve plates or with the help of check valve [1]. This kind of hydraulic machines loose efficiency dramatically at partial displacement because all of the pistons remain at high pressure at the cycle time and due to pressure inside the piston leakage and shear losses increases. One approach to improve the efficiency of the displacement machine can be controllin

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13

Siu, Daniel. "Stochastic Hybrid Dynamic Systems: Modeling, Estimation and Simulation." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4405.

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Stochastic hybrid dynamic systems that incorporate both continuous and discrete dynamics have been an area of great interest over the recent years. In view of applications, stochastic hybrid dynamic systems have been employed to diverse fields of studies, such as communication networks, air traffic management, and insurance risk models. The aim of the present study is to investigate properties of some classes of stochastic hybrid dynamic systems. The class of stochastic hybrid dynamic systems investigated has random jumps driven by a non-homogeneous Poisson process and deterministic jumps trig

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14

Qiu, Fasheng. "A Framework for Group Modeling in Agent-Based Pedestrian Crowd Simulations." Digital Archive @ GSU, 2010. http://digitalarchive.gsu.edu/cs_diss/56.

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Pedestrian crowd simulation explores crowd behaviors in virtual environments. It is extensively studied in many areas, such as safety and civil engineering, transportation, social science, entertainment industry and so on. As a common phenomenon in pedestrian crowds, grouping can play important roles in crowd behaviors. To achieve more realistic simulations, it is important to support group modeling in crowd behaviors. Nevertheless, group modeling is still an open and challenging problem. The influence of groups on the dynamics of crowd movement has not been incorporated into most existing cro

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15

Rao, Dhananjai M. "Study of Dynamic Component Substitutions." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1060366173.

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16

Call, Anson Jay. "Dynamic modeling and simulation of a snake-like robot." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/19523.

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17

Shim, Hyunju. "An xml-based diagrammatic dynamic modeling and simulation system." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000950.

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18

McKenna, Kyra Patricia. "Real-time interactive dynamic mesh modeling : laparoscopic surgical simulation." Thesis, Queen's University Belfast, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492022.

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This thesis presents the results of research into interactive deformable mesh modeling for the purposes of simulating organ tissue. The research was based on developing a deformable model applicable to the development a low cost laparoscopic surgical simulator with a minimally specified hardware configuration. Modeling a dynamic deformable mesh involved developing the following key components: a physical algorithmic model to controls model deformation, real-time collision detection and response, mesh adaptation, mesh cutting and tool-organ interaction. For this research work, the components we

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19

Hilbig, Travis. "Scratch Modeling of Polymeric Materials with Molecular Dynamics." Thesis, University of North Texas, 2012. https://digital.library.unt.edu/ark:/67531/metadc149608/.

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It is impossible to determine the amount of money that is spent every replacing products damaged from wear, but it is safe to assume that it is in the millions of dollars. With metallic materials, liquid lubricants are often used to prevent wear from materials rubbing against one another. However, with polymeric materials, liquid lubricants cause swelling, creating an increase in friction and therefore increasing the wear. Therefore, a different method or methods to mitigate wear in polymers should be developed. For better understanding of the phenomenon of wear, scratch resistance testing can

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20

Wu, Han. "Dislocation Dynamics Simulations of Plasticity in Cu Thin Films." Thesis, University of North Texas, 2013. https://digital.library.unt.edu/ark:/67531/metadc500046/.

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Strong size effects in plastic deformation of thin films have been experimentally observed, indicating non-traditional deformation mechanisms. These observations require improved understanding of the behavior of dislocation in small size materials, as they are the primary plastic deformation carrier. Dislocation dynamics (DD) is a computational method that is capable of directly simulating the motion and interaction of dislocations in crystalline materials. This provides a convenient approach to study micro plasticity in thin films. While two-dimensional dislocation dynamics simulation in thin

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21

Karatas, Soner. "Leo Satellites: Dynamic Modelling, Simulations And Some Nonlinear Attitude Control Techniques." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607196/index.pdf.

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In this thesis nonlinear control method techniques are investigated to control the attitude of Low Earth Orbit satellites. Nonlinear control methods are compared with linear control methods. Simulations are done using Matlab and Simulink software and BILSAT-1 parameters are used in the simulations. Reaction wheels are used as the actuator.

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22

Dallaire, Jonathan. "Thermal conductivity of carbon nanotubes from equilibrium molecular dynamics simulations : sensitivity to modeling and simulation parameters." Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/29017/29017.pdf.

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23

Vajre, Chetan D. "Modeling Dynamic Interactions in a Software Development Project." [Tampa, Fla. : s.n.], 2003. http://purl.fcla.edu/fcla/etd/SFE0000096.

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24

Bånkestad, Maria. "Modeling, Simulation and Dynamic control of a Wave Energy Converter." Thesis, KTH, Numerisk analys, NA, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-134104.

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The energy in ocean waves is a renewable energy resource not yet fully exploited. Research in converting ocean energy to useful electricity has been ongoing for about 40 years, but no one has so far succeed to do it at sufficiently low cost. CorPower Ocean has developed a method, which in theory can achieve this. It uses a light buoy and a control strategy called Phase Control. The purpose of this thesis is to develop a mathematical model of this method - using LinearWave Theory to derive the hydrodynamic forces - and from the simulated results analyze the energy output of the method. In the p

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25

Tinker, Matthew Michael. "Wheel loader powertrain modeling for real-time vehicle dynamic simulation." Thesis, University of Iowa, 2006. http://ir.uiowa.edu/etd/75.

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26

ALBUQUERQUE, GIL RUDGE CAVALCANTI DE. "MODELING AND SIMULATION OF THE DYNAMIC OF SURFACE MOORED BUOYS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2008. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=13395@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Um método para a simulação dinâmica bi-dimensional de bóias cilíndricas de superfície, sujeitas à ação de ondas e ancorada ao fundo marinho através de uma linha flexível é apresentado neste trabalho. O modelo de elementos finitos adotado por Lustosa (2002) é empregado na descrição do movimento do cabo de ancoragem, onde elementos de vigas de Euler-Bernoulli de dois nós são empregados, com a cinemática do movimento descrita através de grandezas referidas ao sistema local co-rotacionad

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27

TIEN, JOAO MIGUEL TRUONG DINH. "DYNAMIC OF ONE-DIMENSIONAL VISCOELASTIC STRUCTURES: MODELING AND NUMERICAL SIMULATION." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1985. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33512@1.

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COMISSÃO NACIONAL DE ENERGIA NUCLEAR<br>No presente trabalho são introduzidas considerações sobre modelos constitutivos viscoelasticos e suas formulações. É apresentada uma teoria de estruturas uni-dimensionais imersas no espaço tri-dimensional, a partir de uma formulação diferencial, permitindo-se a análise de problemas no contexto de grandes deformações.(caracteristicas não-lineares). Adota-se uma lei constitutiva viscoelastica linear, sob forma diferencial. São resolvidos três problemas planos que caracterizam a aplicação do modelo proposto: 1) Viga reta engastada submetida em sua extremida

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28

Rothenhöfer, Gerald S. (Gerald Sven). "Design, dynamic modeling, simulation and feedback control of hydrostatic bearing." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39888.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.<br>Includes bibliographical references (p. 113).<br>A hydrostatic bearing carriage (Hydrocline) that uses an open face linear motor to drive the carriage as well as to preload the hydrostatic bearings has been developed by Professor Alexander Slocum and Gerald Rothenhöfer of the Massachusetts Institute of Technology's Mechanical Engineering Department. The Hydrocline is made to cope with the increasing requirements for accuracy in silicon wafer grinding machines. The prototype was built of aluminum oxi

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29

Kittivatcharapong, S. "A dynamic simulation of a quadruped with impulsive collision modeling /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487853913100029.

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30

Chatelier, Adrien. "Modeling questions for numerical simulations of aeronautical combustors." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLC061/document.

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La conception de chambres de combustion aéronautiques requiert un compromis entre les différents phénomènes physiques présents, comme les interactions entre la flamme et la turbulence, les pertes thermiques, la dynamique de flamme ou l'évaporation du carburant et son mélange. De nombreux outils numériques existent dans la littérature pour prédire ce genre d'écoulements réactifs turbulents. Les modèles de turbulence instationnaires, par exemple LES (Large Eddy Simulation), sont un excellent compromis pour la prédiction du mélange dans des configurations réalistes. L'approche de chimie tabulée r

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31

Jones, Philip Edward James. "Evaluation of water distribution system monitoring using stochastic dynamic modeling." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/40441.

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A stochastic dynamic constituent transport model was developed, capable of simulating the operation of a water distribution system containing pumps and storage tanks, and subject to random demands and contaminant inputs. Long term operation of a hypothetical small town water supply system containing one pump station and one storage tank was simulated while the system was subjected to external contaminant inputs. Repeated simulations were made under different regimes of external contamination applied to the tank, the pump station and at system nodes, and internal contamination representing biof

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32

Gbetchi, Kokouvi. "Multi-scale modeling of thermo-mechanical dynamic damage in quasi-brittle materials." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0049.

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Sous l’effet des impacts mécaniques, les structures constituées de matériaux fragiles peuvent être exposés à la rupture dynamique. La modélisation appropriée des mécanismes de rupture à différentes échelles d’observation et la prédiction de l’endommagement thermomécanique dans ces matériaux sont essentielles pour la conception de structures fiables. Des observations expérimentales sur la rupture dynamique des matériaux fragiles montrent des effets de refroidissement et d’échauffement importants à proximité d’une pointe de fissure. La modélisation du couplage thermomécanique lors de la rupture

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33

Ball, George LeRoy. "A spatial dynamic approach to ecological modeling: Simulating fire spread." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/184986.

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The objective of this dissertation is to develop a new research tool, PROMAP, which will allow the construction of models that satisfy the requirement of spatial distribution and hierarchical interactions within a dynamic framework. An analysis of the form of ecosystems is followed by an examination of current attempts at ecosystem modeling using spatial relationships. An examination of the analytical procedures used in the spatial modeling process, results in a set of criteria that a suitable modeling system should incorporate. These criteria are: the use of real numbers; iterative processing

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34

Mariotte, Guilhem. "Dynamic Modeling of Large-Scale Urban Transportation Systems." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSET010/document.

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La congestion en milieu urbain est un enjeu majeur que ce soit d’un point vue économique, social ou environnemental. À court et moyen terme, l’utilisation de la simulation dynamique du trafic routier peut permettre d’analyser et de guider des politiques d’optimisation des infrastructures existantes. Aujourd’hui, du fait de la complexité des systèmes de transport, les outils de modélisation classiques sont limités à des échelles géographiques peu étendues (de l’ordre du quartier). À grande échelle, le temps de calcul devient rapidement un facteur limitant tout comme le calibrage et la scénarisa

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35

Fonseca, James E. "Temporal and Steric Analysis of Ionic Permeation and Binding in Na+,K+-ATPase via Molecular Dynamic Simulations." Ohio University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1210868607.

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36

Nosek, Michael. "Modeling helicopter dynamic loads using artificial neural networks." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-08182009-040457/.

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37

Shukeir, Malik. "Modeling of irradiation effect on the plasticity of alpha-Iron using dislocation dynamics simulations : plasticity through multi-scale modeling." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS363.

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Ce travail vise à reproduire les interactions individuelles entre les dislocations vis et les boucles induites par l'irradiation en utilisant les simulations de dynamique des dislocations en accord avec les simulations de dynamique moléculaire. Un tel accord se caractérise par la reproduction de la réaction et avoir un valeur des contraintes critiques résolues pour franchir les obstacles. Cette approche fournit le moyen de calibrer notre code de dynamique des dislocations avec les paramètres des simulations de dynamique moléculaire. Par conséquent, il permet d'effectuer des simulations massive

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Høifødt, Herman. "Dynamic Modeling and Simulation of Robot Manipulators : The Newton-Euler Formulation." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-13275.

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Dynamic modeling means deriving equations that explicitly describes the relationship between force and motion in a system. To be able to control a robot manipulator as required by its operation, it is important to consider the dynamic model in design of the control algorithm and simulation of motion. In general there are two approaches available; the Euler-Lagrange formulation and the Newton-Euler formulation. This thesis explains briefly the differences of the formulations, and then research the Newton-Euler method in detail. A complete derivation of the method is derived, and an automated fr

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Arruda, Michael. "Dynamic inverse resiliant control for damaged asymmetric aircraft: Modeling and simulation." Thesis, Wichita State University, 2009. http://hdl.handle.net/10057/2513.

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This paper presents the development and simulation of a dynamic inverse resilient control (DIRC) system that can recover a general aviation aircraft that has sustained damage to a lifting surface in ight, and is now asymmetrical. A new set of di erential equations of motion for the aircraft are derived that account for the asymmetries of the aircraft and for the dynamic e ects of the shift in the center of gravity away from the original body centered axis. The typical symmetric force and moment coe cient buildup is altered to include the inuences of asymmetric lift, drag, and control deection.

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Sarkar, Soumen. "Dynamic modeling of an articulated forestry machine for simulation and control." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=27255.

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Recently, robotic technology has begun to play an important role in forestry operations. An important class of forestry machines is comprised of systems equipped with a mobile platform fitted with an articulated arm carrying a tree processing head. The dynamics of such systems are needed for simulation and control purposes. In contrast to conventional industrial manipulators, which are mounted on stationary bases, a mobile manipulator is dynamically coupled with its base. Base compliance, non-linearity and coupled dynamics result in positioning inaccuracies which in turn give rise to control p

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Sarkar, Soumen. "Dynamic modeling of an articulated forestry machine for simulation and control." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ29628.pdf.

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42

Kim, Taewoo. "A 3D XML-based modeling and simulation framework for dynamic models." [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE1000134.

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Thesis (Ph. D.)--University of Florida, 2002.<br>Title from title page of source document. Document formatted into pages; contains xii, 132 p.; also contains graphics. Includes vita. Includes bibliographical references.

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Eastbourn, Scott Michael. "Modeling and Simulation of a Dynamic Turbofan Engine Using MATLAB/Simulink." Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1340582603.

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Daryabak, Mehdi. "Modeling line-commutated converter HVDC transmission systems using dynamic phasors." IEEE, 2013. http://hdl.handle.net/1993/31632.

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This thesis develops the dynamic phasor model of a line-commutated converter (LCC) high-voltage direct current (HVDC) transmission system. The mathematical definition and properties of dynamic phasors are utilized to model both the dc-side and the ac-side of a LCC-HVDC transmission system as well as 6-pulse Graetz bridge, which is the building block of such a system. The developed model includes low-frequency dynamics of the systems, i.e., fundamental frequency component (50 Hz) at the ac-side and dc component at the dc-side, and removes high-frequency transients. The developed model, however

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Oguz, Cihan. "Control-oriented modeling of discrete configuration molecular scale processes applications in polymer synthesis and thin film growth /." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19867.

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Thesis (Ph.D)--Chemical Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Gallivan, Martha A.; Committee Member: Hess, Dennis; Committee Member: Lee, Jay H.; Committee Member: Li, Mo; Committee Member: Ludovice, Pete.

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Paothong, Arnut. "Dynamic Processes in Network Goods: Modeling, Analysis and Applications." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4558.

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The network externality function plays a very important role in the study of economic network industries. Moreover, the consumer group dynamic interactions coupled with network externality concept is going to play a dominant role in the network goods in the 21st century. The existing literature is stemmed on a choice of externality function with certain quantitative properties. The utility function coupled with the network externality function is used to investigate static properties of rational equilibrium. The aim of this work is to systematically initiate a development of quantitative effec

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Ozunlu, Ozcan Mutlu. "Dynamic modeling of an excavator during digging and simulating the motion." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12610571/index.pdf.

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The aim of this study is to perform the dynamic force analysis of a 3-degrees-of-freedom excavator during digging the soil and to simulate the motion on computer screen. Standard load calculations are done statically, therefore the effects of forces changing with time on the system cannot be observed. The dynamic analysis method used in the thesis is Recursive Newton &ndash<br>Euler Method and the numerical analysis method for simulation is 4th Order Runge &ndash<br>Kutta Method. After this study, the effects of sudden velocity changes<br>i.e, accelerational movements on construction machines,

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Yigit, Cemil. "Theoretical modeling and computer simulations of protein adsorption onto soft polymeric layers." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2016. http://dx.doi.org/10.18452/17528.

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Proteinadsorption ist in vielen biotechnologischen Anwendungen ubiquitär und ein zentrales Forschungsfeld in der Physik der weichen Materie. Das Verstehen der treibenden Kräfte hinter der Proteinadsorption würde zu einer besseren Kontrolle des Adsorptionsprozesses führen und die Entwicklung von Biosystemen mit beispielloser Funktionalität ermöglichen. In der vorliegenden Arbeit wird die Proteinadsorption an weichen polymerartigen Biomaterialien sowie deren physikalische Wechselwirkungen unter Verwendung von zwei unterschiedlichen neu entwickelten Ansätzen theoretisch untersucht. Im ersten Tei

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Ye, Wei. "Nano-epitaxy modeling and design: from atomistic simulations to continuum methods." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50304.

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The dissertation starts from the understanding of dislocation dissipation mechanism due to the image force acting on the dislocation. This work implements a screw dislocation in solids with free surfaces by a novel finite element model, and then image forces of dislocations embedded in various shaped GaN nanorods are calculated. As surface stress could dramatically influence the behavior of nanostructures, this work has developed a novel analytical framework to solve the stress field of solids with dislocations and surface stress. It is successfully implemented in this framework for the case o

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Kewlani, Gaurav. "Large eddy simulations of premixed turbulent flame dynamics : combustion modeling, validation and analysis." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/93863.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 293-300).<br>High efficiency, low emissions and stable operation over a wide range of conditions are some of the key requirements of modem-day combustors. To achieve these objectives, lean premixed flames are generally preferred as they achieve efficient and clean combustion. A drawback of lean premixed combustion, however, is that the flames are more prone to dynamics. The unsteady release of sensible heat and

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