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Dissertations / Theses on the topic 'Models and simulation'

Author: Grafiati

Published: 6 September 2023

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1

Ozhan, Gurkan. "Transforming Mission Space Models To Executable Simulation Models." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613826/index.pdf.

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This thesis presents a two step automatic transformation of Field Artillery Mission Space Conceptual Models (ACMs) into High Level Architecture (HLA) Federation Architecture Models (FAMs) into executable distributed simulation code. The approach followed in the course of this thesis adheres to the Model-Driven Engineering (MDE) philosophy. Both ACMs and FAMs are formally defined conforming to their metamodels, ACMM and FAMM, respectively. ACMM is comprised of a behavioral component, based on Live Sequence Charts (LSCs), and a data component based on UML class diagrams. Using ACMM, the Adjustme

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2

Hauth, Michael. "Visual simulation of deformable models." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97232125X.

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3

Kreula, Juha. "Quantum simulation of fermionic models." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:1de91b0b-1cd7-4a95-ac56-312529b51357.

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This work is a theoretical study of fermionic models. We focus on problems where highly controllable quantum simulators of these models have an important role, and we utilise both the analogue and the digital paradigm of quantum simulation. In the part on analogue quantum simulation, we focus on the proposed 'spin-asymmetric' Josephson effect where Cooper-paired spins display frequency synchronized Josephson oscillations with spin-dependent amplitudes. We consider different scenarios where the phenomenon could manifest in ultracold atomic Fermi gases. We study a Fermi gas Josephson junction in

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4

Pohl, Thomas. "Design of adaptable simulation models." Thesis, Sheffield Hallam University, 2006. http://shura.shu.ac.uk/20240/.

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In today's world, with ever increasing competition, modelling and simulation proves to be a very helpful tool. Many methodologies exist to help build a simulation model from scratch. In terms of adaptability, most current attempts focus on either the operational side, ie the automated integration of data into a model, or the creation of new software. However, very few attempts are being made to improve the adaptability of shelved models built in existing simulation software. As a result, there is a certain reluctance, in some areas, to use simulation to its full potential. Based on these facts

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5

Bezuidenhoudt, Cecile Margaret. "Optimisation of complex simulation models." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/6572.

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Computer simulation models are widely and frequently used to model real systems to predict output responses under specified input conditions. Choosing optimal simulation parameters leads to improved operation of the model but it is still a challenge as to how to go about optimally selecting these parameter values. The aim of this thesis was to see if a method could be found to optimise a simulation model provided by a client. This thesis provides a review of the literature of various simulation optimisation techniques that exist. Five of these simulation optimisation techniques - Simulated Ann

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6

O'Keefe, R. M. "Developing simulation models : an interpreter for visual active simulation." Thesis, University of Southampton, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236359.

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7

Bertelrud, P. Anders I. "An object-oriented simulator for the visual simulation environment." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-08142009-040521/.

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8

Buchta, Christian, and Sara Dolnicar. "Learning by simulation. Computer simulations for strategic marketing decision support in tourism." SFB Adaptive Information Systems and Modelling in Economics and Management Science, WU Vienna University of Economics and Business, 2003. http://epub.wu.ac.at/1718/1/document.pdf.

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This paper describes the use of corporate decision and strategy simulations as a decision-support instrument under varying market conditions in the tourism industry. It goes on to illustrate this use of simulations with an experiment which investigates how successful different market segmentation approaches are in destination management. The experiment assumes a competitive environment and various cycle-length conditions with regard to budget and strategic planning. Computer simulations prove to be a useful management tool, allowing customized experiments which provide insight into the functio

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9

Kajero, Olumayowa T. "Meta-model assisted calibration of computational fluid dynamics simulation models." Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/813857/.

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Computational fluid dynamics (CFD) is a computer-based analysis of the dynamics of fluid flow, and it is widely used in chemical and process engineering applications. However, computation usually becomes a herculean task when calibration of the CFD models with experimental data or sensitivity analysis of the output relative to the inputs is required. This is due to the simulation process being highly computationally intensive, often requiring a large number of simulation runs, with a single simulation run taking hours or days to be completed. Hence, in this research project, the kriging meta-m

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10

Cumin, David. "Simulation in anaesthesia: standards and models." Thesis, University of Auckland, 2010. http://hdl.handle.net/2292/7163.

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Harm from medical errors costs tens of billions of dollars and causes tens of thousands of deaths each year in the United States alone. This is not so surprising considering the lack of opportunity for medical students and consultants alike to practice rare events, to be systematically exposed to common scenarios, or to be objectively assessed. Similarly, there are limited opportunities to test new medical devices or procedures without putting patients at harm. Simulation has provided the airline industry, in particular, with such opportunities and is a contributing factor to the safety

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11

Björk, Martin, and Erik Deng. "Discrete simulation models of surface growth." Thesis, KTH, Teoretisk fysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146052.

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In this thesis the time evolution and scaling properties of different discrete models of surface growth using computer simulation is studied. The models are mainly using random deposition at a perpendicular angle to the substrates to model the adsorption process, and both one dimensional and two dimensional surfaces are considered. The Edwards-Wilkinson, Kardar-Parisi-Zhang and Mullins equations are also studied as analytical methods to describe the growth of surfaces. The scaling exponents derived from these equations are used as reference when analysing the exponents calculated from the simu

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12

PEREIRA, GUILHERME ARMANDO DE ALMEIDA. "COPULA MODELS FOR STREAMFLOW SCENARIO SIMULATION." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2017. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33720@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>PROGRAMA DE DOUTORADO SANDUÍCHE NO EXTERIOR<br>Muitos dos modelos de simulação de cenários de vazões, necessários para o planejamento e operação de setores elétricos, são construídos sob hipóteses rígidas. Isto pode restringir sua capacidade de representar dependências não-lineares e\ou distribuições não usuais. Cópulas superam estas limitações. Elas possibilitam que o comportam

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13

Ayres, Kelley. "Simulation models of bank risk management." Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/18969.

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Master of Agribusiness<br>Department of Agricultural Economics<br>Bryan Schurle<br>Quantifying the impact of various economic events is essential for risk management in community banks. Interest rate shocks of either rapidly increasing or decreasing rates, in magnitudes of at least 200 basis points, is one of the more common risks modeled. Liquidity crises that impact deposits or loan demand can arise from either local or national economic events is another risk factor that regulators are requiring banks to quantify and plan for. Excel spreadsheets can be used to develop models to measure an

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14

Xie, Xuping. "Large Eddy Simulation Reduced Order Models." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/77626.

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This dissertation uses spatial filtering to develop a large eddy simulation reduced order model (LES-ROM) framework for fluid flows. Proper orthogonal decomposition is utilized to extract the dominant spatial structures of the system. Within the general LES-ROM framework, two approaches are proposed to address the celebrated ROM closure problem. No phenomenological arguments (e.g., of eddy viscosity type) are used to develop these new ROM closure models. The first novel model is the approximate deconvolution ROM (AD-ROM), which uses methods from image processing and inverse problems to s

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15

Spence, Michael A. "Statistical issues in ecological simulation models." Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/10517/.

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Complex simulation models are being increasingly used in ecological modelling as a way of trying to understand a system by examining the processes that make up that system. Complex simulation models generally model behaviour of a system through a series of rules or algorithms, rather than describing it in a formal mathematical way and this can be a good way of capturing an ecologist's expertise and intuition. When interpreting outputs from such a model, it is important to allow for uncertainty due to parameter values which may not be known precisely and structural or implementation aspects. Th

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16

Coskun, Sarp Arda. "PATHCASE-SB MODEL SIMULATION AND MODEL COMPOSITION TOOLS FOR SYSTEMS BIOLOGY MODELS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1328556115.

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17

Köhn, Elvira. "Benefits of Simulation Models in Product Data Management System : A pilot study with cooling system simulation models." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-45199.

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The product development today handles increasingly complex products and to be able to compete on the current market companies need an effective PLM/PDM system to manage the lifecycle, models, and data connected to their products. Three of the factors for success in product development are time, cost, and quality. Which need to be supported by the processes and tool used in a project. Product development often uses both physical and analytical prototypes. The analytical method of simulation is an important element in product development that has started to shift from being a validation and veri

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18

Kucukyavuz, Fatih. "Transforming Conceptual Models Of The Mission Space Into Simulation Space Models." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613158/index.pdf.

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Helping to abstract a valid model from real system, conceptual modeling is an essential phase in simulation development lifecycle. With the development of the KAMA framework, a new methodology was presented to develop mission space conceptual model for simulation systems. It provides metamodel elements represented by graphical diagrams to develop conceptual models of mission space. BOM (Base Object Model), developed by SISO (Simulation Interoperability Standards Organization), is another conceptual modeling concept serving for simulation space. KAMA models are very close to problem domain an

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19

Wikström, Jonas. "3D Model of Fuel Tank for System Simulation : A methodology for combining CAD models with simulation tools." Thesis, Linköpings universitet, Maskinkonstruktion, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-71370.

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Engineering aircraft systems is a complex task. Therefore models and computer simulations are needed to test functions and behaviors of non existing systems, reduce testing time and cost, reduce the risk involved and to detect problems early which reduce the amount of implementation errors. At the section Vehicle Simulation and Thermal Analysis at Saab Aeronautics in Linköping every basic aircraft system is designed and simulated, for example the fuel system. Currently 2-dimensional rectangular blocks are used in the simulation model to represent the fuel tanks. However, this is too simplistic

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20

Ahmad, Shamshad. "Numerical simulation of flames using flamelet models." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/405993.

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The thesis topic is located in the domain of numerical simulation of laminar flames. The principal aim of the presented research is the study of numerical techniques for the multidimensional simulation of flames with low computational costs. Present work is divided into three parts: First part is related to the development of a C++ simulation code for 1D laminar premixed flames. In the second part, a new technique to account for differential diffusion effects is proposed, which is based on tabulated chemistry methods. The third part focuses on the analysis of partially premixed flames. A de

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21

Axling, Erik. "Automatic Generation of Simulation Models from Designs." Thesis, Linköping University, Department of Computer and Information Science, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10409.

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<p>When working with embedded systems, secure and fast applications are desired. To achieve this the applications needs to be analyzed and optimized so that they will not be deadlocked or communicate inefficiently. For this purpose an analysis program that can track communications, deadlocks and response times is needed. Operating System Embedded, OSE, is a wide spread real-time operating system that is used in embedded systems. OSE-applications are excellent candidates for analysis and there exists such a tool, VirtualTime, for that purpose. To analyze an OSE-application a model needs to be w

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22

Oprea, Alexandra. "3D Fuel Tank Models for System Simulation." Thesis, KTH, Aerodynamik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102084.

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The purpose of the present master thesis is to optimize the current fuel tank simulations procedure for the next generation of JAS 39 Gripen ghters developed by SAAB AB. The current simulation process involves three dierent steps performed in three dierent computer environments. While the procedure works reasonably well on the fuel tank models of the previous version of the aircraft, it is too slow for the new Gripen tank models and their high level of detail. An optimized version of the procedure is put forward, which allows for tank analysis and fuel system simulation within reasonable time

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23

Bhargava, Rajat. "Simulation models for variable speed electric drives." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq22571.pdf.

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24

Yngve, Gary. "Visualization for biological models, simulation, and ontologies /." Thesis, Connect to this title online; UW restricted, 2008. http://hdl.handle.net/1773/6912.

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25

Huynh, Quoc T. "Dynamic system simulation using graphically defined models." Thesis, Swansea University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.637363.

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This thesis describes an approach to the digital simulation of dynamic systems in which the behaviour occurs continuously in time. Dynamic systems are modelled and synthesised in graphical forms, such as block diagrams and signal flow graph. The emphasis in this thesis has been on the block diagram form. A block diagram representation of a system model is graphically defined in the Control Engineering workStation (CES). Blocks in the block diagram can have realistic graphical symbols and meanings. Block operations can be defined in mathematical form, parameter-based form or text-based form. Th

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26

Shah, Sandeep R. "Perfect simulation of conditional and weighted models." Thesis, University of Warwick, 2004. http://wrap.warwick.ac.uk/59406/.

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This thesis is about probabilistic simulation techniques. Specifically we consider the exact or perfect sampling of spatial point process models via the dominated CFTP protocol. Fundamental among point process models is the Poisson process, which formalises the notion of complete spatial randomness; synonymous with the Poisson process is the Boolean model. The models treated here are the conditional Boolean model and the area-interaction process. The latter is obtained by weighting a Poisson process according to the area of its associated Boolean model. A fundamental tool employed in the perfe

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27

Serras, Joan. "Multidimensional multilevel representation for traffic simulation models." Thesis, Open University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.446273.

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28

Xu, Weiran 1968. "New turbulence models for indoor airflow simulation." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9933.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Architecture, 1998.<br>Includes bibliographical references (p. 157-165).<br>It is important to predict indoor environment in order to design thermally comfortable and healthy indoor spaces. Heating, Ventilating and Air Conditioning (HVAC) design engineers and architects widely use the Computational Fluid Dynamics (CFD) technique for indoor environment predictions. The CFD technique requires a turbulence model to correctly calculate indoor air distribution. However, the currently available turbulence models in the literature are e

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29

Mahanti, Bhanu Prasad 1981. "Aggregate calibration of microscopic traffic simulation models." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28636.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2004.<br>Includes bibliographical references (p. 97-101).<br>The problem of calibration of microscopic simulation models with aggregate data has received significant attention in recent years. But day-to-day variability in inputs such as travel demand has not been considered. In this thesis, a general formulation has been proposed for the problem in the presence of multiple days of data. The formulation considers the day-to-day variability in all the inputs to the simulation model. It has then b

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Coe, Paul. "Simulation models of shared-memory multiprocessor systems." Thesis, University of Edinburgh, 2000. http://hdl.handle.net/1842/13437.

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Multiprocessors have often been thought of as the solution to today's every increasing computing needs; but they are expensive, complex and difficult to design. This thesis focusses on the development of multiprocessor simulations that would aid the design and evaluation of such systems. The thesis starts by outlining the various possibilities for multiprocessor design and discusses some of the more common problems that must be addressed. A selection of simulation environments and models that have been developed to study complex computer systems are then described. The major problem with these

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31

Kuljis, Jasminka. "User interfaces and discrete event simulation models." Thesis, London School of Economics and Political Science (University of London), 1995. http://etheses.lse.ac.uk/1380/.

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A user interface is critical to the success of any computer-based system. Numerous studies have shown that interface design has a significant influence on factors such as learning time, performance speed, error rates, and user satisfaction. Computer-based simulation modelling is one of the domains that is particularly demanding in terms of user interfaces. It is also an area that often pioneers new technologies that are not necessarily previously researched in terms of human-computer interaction. The dissertation describes research into user interfaces for discrete event simulation. Issues tha

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32

Caruso, Elise M. "A Simulation Analysis of Bivariate Availability Models." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/34153.

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Equipment behavior is often discussed in terms of age and use. For example, an automobile is frequently referred to 3 years old with 30,000 miles. Bivariate failure modeling provides a framework for studying system behavior as a function of two variables. This is meaningful when studying the reliability/availability of systems and equipment. This thesis extends work done in the area of bivariate failure modeling. Four bivariate failure models are selected for analysis. The study includes exploration of bivariate random number generation. The random data is utilized in estimating the b

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33

Alt, Aaron J. "Profile Driven Partitioning Of Parallel Simulation Models." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1407406955.

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34

Fazal, Md Abul. "MANAGING GROUNDWATER AQUIFERS WITH SIMULATION/OPTIMIZATION MODELS." Kyoto University, 1999. http://hdl.handle.net/2433/181889.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第7880号<br>農博第1038号<br>新制||農||777(附属図書館)<br>学位論文||H11||N3243(農学部図書室)<br>UT51-99-G474<br>京都大学大学院農学研究科地域環境科学専攻<br>(主査)教授河地利彦, 教授青山咸康, 教授三野徹<br>学位規則第4条第1項該当

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35

Brauen, H. Glenn (Howard Glenn) Carleton University Dissertation Computer Science. "Graphically defining simulation models of concurrent systems." Ottawa, 1988.

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36

Chadha, Vikrampal. "Simulation of large-scale system-level models." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-12162009-020334/.

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Butler, John Christopher. "Simulation analysis of multi-criteria decision models /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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38

Reggiani, Barbara <1976&gt. "Simulation models in biomechanics and experimental mechanics." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/542/1/reggiani_barbara_tesi.pdf.

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Reggiani, Barbara <1976&gt. "Simulation models in biomechanics and experimental mechanics." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/542/.

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Srivrunyoo, Inthira. "A contextualized Web-based learning environment for DEVS models." unrestricted, 2007. http://etd.gsu.edu/theses/available/etd-11222007-132933/.

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Thesis (M.S.)--Georgia State University, 2007.<br>Title from file title page. Xiaolin Hu, committee chair; Rajshekhar Sunderraman, Ying Zhu, committee members. Electronic text (71 p. : ill. (some col.)) : digital, PDF file. Description based on contents viewed Jan. 29, 2008. Includes bibliographical references (p. 70-71).

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Song, Ziqi, and 宋子麒. "A simulation based dynamic taxi model." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B38574652.

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Chen, Quan, and 陈全. "Efficient high-frequency electromagnetic simulation in VLSI: rough surface effects and electromagnetic-semiconductor coupled simulation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B44904940.

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Huat, Bujang bin Kim. "Simulation of field trial structures." Thesis, University of Manchester, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294076.

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Madramootoo, Chandra Alastair 1954. "An agricultural land drainage simulation model /." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=72017.

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A deterministic computer model was developed to continuously simulate the runoff from surface and subsurface-drained fields in the St. Lawrence lowlands. The model simulates all of the major hydrologic and hydraulic processes occurring both above and below the ground. Input data requirements include hourly rainfall, daily potential evapotranspiration, soil physical properties, field dimensions, open channel geometry and drainage system specifications.<br>Events for the years 1978 to 1982 were simulated, to compare the runoff characteristics between 20 ha, clay loam, surface-drained and subsurf

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Hopkins, Roisin. "System identification for crash victim simulation." Thesis, Loughborough University, 1995. https://dspace.lboro.ac.uk/2134/7053.

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The work presented in this thesis concerns the identification of vehicle occupant models. Mathematical models of the vehicle occupant are used in the preliminary design and development phase of vehicle design. In the design phase, the model is used to guide the decision on restraint system feasibility. In the development phase the model is used to suggest solutions to problems associated with the dummy trajectory or restraint system performance. Current methods used -to determine such models involve independent component testing. The conditions under which the components are tested are often n

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46

Easom, Gary. "Improved turbulence models for computational wind engineering." Thesis, University of Nottingham, 2000. http://eprints.nottingham.ac.uk/10113/.

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The fundamental errors in the numerical modelling of the turbulent component of fluid flow are one of the main reasons why computational fluid dynamics techniques have not yet been fully accepted by the wind engineering community. This thesis is the result of extensive research that was undertaken to assess the various methods available for numerical simulation of turbulent fluid flow. The research was undertaken with a view to developing improved turbulence models for computational wind engineering. Investigations have concentrated on analysing the accuracy and numerical stability of a number

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Pinilla, Camilo Ernesto. "Numerical simulation of shear instability in shallow shear flows." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115697.

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The instabilities of shallow shear flows are analyzed to study exchanges processes across shear flows in inland and coastal waters, coastal and ocean currents, and winds across the thermal-and-moisture fronts. These shear flows observed in nature are driven by gravity and governed by the shallow water equations (SWE). A highly accurate, and robust, computational scheme has been developed to solve these SWE. Time integration of the SWE was carried out using the fourth-order Runge-Kutta scheme. A third-order upwind bias finite difference approximation known as QUICK (Quadratic Upstream Interpola

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Michel, René. "Simulation and estimation in multivariate generalized Pareto models." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=981745466.

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Östlund, Per. "Simulation of Modelica Models on the CUDA Architecture." Thesis, Linköping University, Department of Computer and Information Science, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-52060.

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<p>Simulations are very important for many reasons, and finding ways of accelerating simulations are therefore interesting. In this thesis the feasibility of automatically generating simulation code for a limited set of Modelica models that can be executed on NVIDIAs CUDA architecture is studied. The OpenModelica compiler, an open-source Modelica compiler, was for this purpose extended to generate CUDA code.</p><p>This thesis presents an overview of the CUDA architecture, and looks at the problems that need to be solved to generate efficient simulation code for this architecture. Methods of fi

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Poon, Andrew. "Real time simulation of colonoscopy using dynamic models." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/8177.

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