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Thèses sur le sujet « Discrete-event simulations »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 9 février 2022

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1

Richardson, D. S. "Terminating parallel discrete event simulations." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-03172010-020620/.

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Dave, Jagrut Durdant. "Parallel Discrete Event Simulation Techniques for Scientific Simulations." Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6942.

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Exponential growth in computer technology, both in terms of individual CPUs and parallel technologies over the past decades has triggered rapid progress in large scale simulations. However, despite these achievements it has become clear that many conventional state-of-the-art techniques are ill-equipped to tackle problems that inherently involve multiple scales in configuration space. Our difficulty is that conventional ("time driven" or "time stepped") techniques update all parts of simulation space (fields, particles) synchronously, i.e. at time intervals assumed to be the same throughout th

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3

Jundén, Linus. "Discrete Event Simulations in Forest Technology." Thesis, Umeå universitet, Institutionen för fysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-45678.

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Development of a tool for discrete event simulations in forest technology, dependent onspatial components, has successfully been initialized in this thesis project. These simulations may be used to optimize the way the forest is used and to evaluate new machine concepts in forestry. The Python library for discrete event simulation, SimPy, was chosen as the foundationfor the tool. The developed tool can handle spatial objects such as moving machines, trees and boulders. Support for continuous linear movements was also added, which has resulted in a model that partially overlaps continuous and d

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Glazer, D. W. (David William). "Load balancing parallel discrete event simulations." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39384.

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This thesis presents several load balancing algorithms for parallel discrete event simulations executed under both optimistic and conservative mechanisms. The algorithms rest upon recent developments in active process migration, which permits the use of dynamic strategies. Dynamic load balancing allow for re-adjustments when resource requirements vary during simulation. It is also useful when initial resource predictions are unknown or incorrect.<br>A simulated multi-processor environment (PARALLEX) was developed in order to evaluate the algorithms. Results indicate that substantial performanc

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5

Ulu, Buket. "Monitoring And Checking Of Discrete Event Simulations." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1053305/index.pdf.

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Discrete event simulation is a widely used technique for decision support. The results of the simulation must be reliable for critical decision making problems. Therefore, much research has concentrated on the verification and validation of simulations. In this thesis, we apply a well-known dynamic verification technique, assertion checking method, as a validation technique. Our aim is to validate the particular runs of the simulation model, rather than the model itself. As a case study, the operations of a manufacturing cell have been simulated. The cell, which is METUCIM Laboratory at the Me

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Sanjeevan, Vasant. "The cost of terminating parallel discrete-event simulations." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09292009-020138/.

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Falcigno, Steven V. "The Simulation Engine, a platform for developing industrial process knowledge-based discrete event simulations." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0009/MQ33370.pdf.

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8

Child, Ryan. "Performance and Power Optimization of Parallel Discrete Event Simulations Using DVFS." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1342730759.

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9

Higiro, Julius Didier. "MANAGING PENDING EVENTS IN SEQUENTIAL & OPTIMISTIC PARALLEL DISCRETE EVENT SIMULATIONS." Miami University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=miami1512034353883027.

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10

Stoffers, Mirko [Verfasser]. "Automated Optimization of Discrete Event Simulations without Knowing the Model / Mirko Stoffers." Düren : Shaker, 2019. http://d-nb.info/1200808460/34.

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11

Madipally, Sunil veer Kumar. "Simulation of Sawmill Yard Operations Using Software Agents." Thesis, Högskolan Dalarna, Datateknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:du-6026.

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Bergkvist insjön AB is a sawmill yard which is capable of producing 350,000 cubic meter of timber every year this requires lot of internal resources. Sawmill operations can be classified as unloading, sorting, storage and production of timber. In the company we have trucks arriving at random they have to be unloaded and sent back at the earliest to avoid queuing up of trucks creating a problem for truck owners. The sawmill yard has to operate with two log stackers that does several tasks including transporting the logs from trucks to measurement station where the logs will be sorted into clas

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Davoren, Mark. "A structural approach to the mapping problem in parallel discrete event logic simulations." Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/14748.

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13

Eickhoff, Mirko. "Sequential Analysis of Quantiles and Probability Distributions by Replicated Simulations." Thesis, University of Canterbury. Computer Science and Software Engineering, 2007. http://hdl.handle.net/10092/1238.

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Discrete event simulation is well known to be a powerful approach to investigate behaviour of complex dynamic stochastic systems, especially when the system is analytically not tractable. The estimation of mean values has traditionally been the main goal of simulation output analysis, even though it provides limited information about the analysed system's performance. Because of its complexity, quantile analysis is not as frequently applied, despite its ability to provide much deeper insights into the system of interest. A set of quantiles can be used to approximate a cumulative distribution f

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14

DePero, Matthew Michael. "Thread Safe Multi-Tier Priority Queue for Managing Pending Events in Multi-Threaded Discrete Event Simulations." Miami University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami1535426621614915.

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Verma, Poonam Santosh. "Large Scale Computer Investigations of Non-Equilibrium Surface Growth for Surfaces From Parallel Discrete Event Simulations." MSSTATE, 2004. http://sun.library.msstate.edu/ETD-db/theses/available/etd-04192004-140532/.

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The asymptotic scaling properties of conservative algorithms for parallel discrete-event simulations (e.g.: for spatially distributed parallel simulations of dynamic Monte Carlo for spin systems) of one-dimensional systems with system size $L$ is studied. The particular case studied here is the case of one or two elements assigned to each processor element. The previously studied case of one element per processor is reviewed, and the two elements per processor case is presented. The key concept is a simulated time horizon which is an evolving non equilibrium surface, specific for the particula

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Verma, Poonam Santosh. "Non-equilibrium surface growth for competitive growth models and applications to conservative parallel discrete event simulations." Diss., Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-11092007-141815.

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Bradley, Randolph L. (Randolph Lewis). "Evaluating inventory segmentation strategies for aftermarket service parts in heavy industry using linked discrete-event and Monte Carlo simulations." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/77459.

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Thesis (M. Eng. in Logistics)--Massachusetts Institute of Technology, Engineering Systems Division, 2012.<br>Vita. Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 104-106).<br>Heavy industries operate equipment having a long life to generate revenue or perform a mission. These industries must invest in the specialized service parts needed to maintain their equipment, because unlike in other industries such as automotive, there is often no aftermarket supplier. If parts are not on the shelf when needed, equipment sits idle while replacements are manufactured. St

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Yoginath, Srikanth B. "Virtual time-aware virtual machine systems." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52321.

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Discrete dynamic system models that track, maintain, utilize, and evolve virtual time are referred to as virtual time systems (VTS). The realization of VTS using virtual machine (VM) technology offers several benefits including fidelity, scalability, interoperability, fault tolerance and load balancing. The usage of VTS with VMs appears in two ways: (a) VMs within VTS, and (b) VTS over VMs. The former is prevalent in high-fidelity cyber infrastructure simulations and cyber-physical system simulations, wherein VMs form a crucial component of VTS. The latter appears in the popular Cloud comp

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De, Grande Robson E. "Dynamic Load Balancing Schemes for Large-scale HLA-based Simulations." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23110.

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Dynamic balancing of computation and communication load is vital for the execution stability and performance of distributed, parallel simulations deployed on shared, unreliable resources of large-scale environments. High Level Architecture (HLA) based simulations can experience a decrease in performance due to imbalances that are produced initially and/or during run-time. These imbalances are generated by the dynamic load changes of distributed simulations or by unknown, non-managed background processes resulting from the non-dedication of shared resources. Due to the dynamic execution charact

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20

Chuah, Keng Hoo. "OPTIMIZATION AND SIMULATION OF JUST-IN-TIME SUPPLY PICKUP AND DELIVERY SYSTEMS." UKnowledge, 2004. http://uknowledge.uky.edu/gradschool_diss/384.

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A just-in-time supply pickup and delivery system (JSS) manages the logistic operations between a manufacturing plant and its suppliers by controlling the sequence, timing, and frequency of container pickups and parts deliveries, thereby coordinating internal conveyance, external conveyance, and the operation of cross-docking facilities. The system is important to just-in-time production lines that maintain small inventories. This research studies the logistics, supply chain, and production control of JSS. First, a new meta-heuristics approach (taboo search) is developed to solve a general freq

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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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22

Skoglund, Pascal, and Tobias Peterson. "Development of a Simulation Platform Addressing the Digitalization of the Stockholm Healthcare System." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-227193.

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As e-Health solutions start being integrated into the healthcare system in Stockholm County, the possibility of moving monitored patients out of the hospitals and into their homes increases. Such a change in the healthcare system could require a major redistribution of resources in order to meet possible changes in resource demands. Simulations can be used in order to understand how the healthcare system needs to adapt to handle the relocation of monitored patients. In this thesis project, a simulation platform has been designed and developed to address possible questions posed by this redesig

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Kalantery, Nasser. "Parallel discrete event simulation." Thesis, University of Westminster, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262506.

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24

Possik, Jalal. "Contribution to a Methodology and a Co-Simulation Framework assessing the impact of Lean on Manufacturing Performance." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0390.

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Au-delà des compétences humaines et managériales nécessaires pour développer une entreprise, le bon déploiement du Lean peut jouer un rôle important dans la réduction des gaspillages et la maximisation de l'efficacité. Ces avantages dépendent fortement de l'intégration adéquate des techniques Lean. L'un des principaux obstacles auxquels font face les entreprises est la difficulté de choisir les outils Lean qui correspondent le mieux à leurs contextes et qui sont les mieux adaptés à l’atteinte de leurs objectifs.Dans cette étude, nous avons proposé un environnement de co-simulation basé sur HLA

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Desai, Sasi Bharath. "Discrete Event Simulation of Elevator Systems." Scholarship @ Claremont, 2012. http://scholarship.claremont.edu/cmc_theses/343.

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The intent of this paper is to present the reader with a simple comparison of two systems of vertical transportation. Vertical transportation is a a relatively new field and is the subject of much interest in today's world. As buildings get taller and real estate becomes more expensive, the need to find a quick, efficient system with a small footprint becomes important. By performing a simulation and subjecting the two systems under study to similar traffic conditions, one can determine the effectiveness of one system relative to the other. Additionally, we look at the effects of changing vari

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Hendry, Barbara. "Distributed object-oriented discrete event simulation /." Online version of thesis, 1990. http://hdl.handle.net/1850/10999.

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Park, Alfred John. "Master/worker parallel discrete event simulation." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/28170.

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Thesis (M. S.)--Computing, Georgia Institute of Technology, 2009.<br>Committee Chair: Fujimoto, Richard; Committee Member: Bader, David; Committee Member: Perumalla, Kalyan; Committee Member: Riley, George; Committee Member: Vuduc, Richard.

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Lindberg, Therese. "Discrete Event Simulation of Bus Terminals." Licentiate thesis, Linköpings universitet, Kommunikations- och transportsystem, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-156646.

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Public transport is important to society as it provides spatial accessibility and reduces congestion and pollution in comparison to other motorized modes. To assure a high-quality service, all parts of the system need to be well-functioning and properly planned. One important aspect for the system's bus terminals is their capacity. This needs to be high enough to avoid congestion and queues and the delays these may lead to. During planning processes, various suggested designs and solutions for a terminal need to be evaluated. Estimating capacity and how well the suggestions will function is a

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Smart, Colin. "Demand-driven, concurrent discrete event simulation." Thesis, University of Edinburgh, 2001. http://hdl.handle.net/1842/12973.

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The simulation of complex systems can consume vast amounts of computing power. In common with other disciplines faced with complex systems, simulationists have approached the management of complexity from two angles; sub-system evaluation and hierarchical evaluation. Sub-system evaluation attempts to determine the global behaviour by determining the local behaviour and then joining these behaviours together. Hierarchical simulation tries to reduce the detail in the system in areas which are less critical to the model. Demand driven evaluation provides a coherent approach to the problem of simu

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Barakat, Mamdouh Taysir. "Semantic modelling for discrete event simulation." Thesis, London School of Economics and Political Science (University of London), 1992. http://etheses.lse.ac.uk/2823/.

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Discrete event simulation modelling has been established as an important tool for management planning. This process has been aided by the availability of off-the-shelf simulation systems for microcomputers. Traditionally these have had text-based interfaces and very limited graphics. As the availability of powerful colour microcomputers have increased, graphical front-ends have been added. As clients have got used to consistent graphical interfaces (e.g. Apple Macintosh or Microsoft Windows), they have desired the same level of integration in their simulation support environments. Research in

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Gupta, Sounak. "Pending Event Set Management in Parallel Discrete Event Simulation." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535701778479768.

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Plan, Elodie L. "Pharmacometric Methods and Novel Models for Discrete Data." Doctoral thesis, Uppsala universitet, Institutionen för farmaceutisk biovetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-150929.

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Pharmacodynamic processes and disease progression are increasingly characterized with pharmacometric models. However, modelling options for discrete-type responses remain limited, although these response variables are commonly encountered clinical endpoints. Types of data defined as discrete data are generally ordinal, e.g. symptom severity, count, i.e. event frequency, and time-to-event, i.e. event occurrence. Underlying assumptions accompanying discrete data models need investigation and possibly adaptations in order to expand their use. Moreover, because these models are highly non-linear,

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Stork, Kirk A. "Sensors in object oriented discrete event simulation." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA320555.

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Thesis (M.S. in Operations Research) Naval Postgraduate School, September 1996.<br>Thesis advisor(s): Arnold H. Buss. "September 1996." Includes bibliographical references (p. 43-44). Also Available online.

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Wales, F. J. "A software environment for discrete event simulation." Thesis, University of Bradford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376694.

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Ho, Ping-Wing. "Discrete event simulation for yarn manufacturing processes." Thesis, University of Huddersfield, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315679.

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Faranca, Anthony G. (Anthony Gilbert) 1971. "Complex system analysis through discrete event simulation." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/34788.

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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; in conjunction with the Leaders for Manufacturing Program at MIT, 2004.<br>Includes bibliographical references (leaf 63).<br>E-commerce is generally thought of as a world without walls. Although a computer monitor may replace a storefront window, the products that are purchased online have to be distributed from a brick and mortar warehouse. Amazon.com now makes it possible to instantly order and quickly receive everything from

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Bauer, Pavol. "Parallelism and efficiency in discrete-event simulation." Licentiate thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-264756.

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Discrete-event models depict systems where a discrete state is repeatedly altered by instantaneous changes in time, the events of the model. Such models have gained popularity in fields such as Computational Systems Biology or Computational Epidemiology due to the high modeling flexibility and the possibility to easily combine stochastic and deterministic dynamics. However, the system size of modern discrete-event models is growing and/or they need to be simulated at long time periods. Thus, efficient simulation algorithms are required, as well as the possibility to harness the compute potenti

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Derrick, Emory Joseph. "Conceptual frameworks for discrete event simulation modeling." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43840.

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Evans, Julianna Marie. "Spacecraft-ns3: Spacecraft Discrete-Event Network Simulation." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/99102.

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As near-Earth space becomes more populated with large constellations of satellites and research into spacecraft autonomy and disaggregation becomes more prevalent, it will be increasingly important to design effective communication procedures between satellites to efficiently share resources and avoid collisions. Though there have been several space networking simulation tools created in recent years, they all lack rigorous astrodynamics models or use high-fidelity but bulky and computationally taxing commercial software. This research presents Spacecraft-ns3, an extension to the ns-3 network

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Alghwiri, Alaa Ali. "Parking System Analysis Using Discrete Event Simulation." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1405364577.

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Albors, Marques Laura, and Jagathishvar Jayakumar. "Discrete Event Simulation for Aftermarket Supply Chain." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280678.

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The planning of an Aftermarket Supply Chain is a very complex task. This is due to an unpredictable demand which is driven by the need for maintenance and repair. This drive translates to a high variety of lead times, a large number of stock-keeping units (SKUs) and the capacity to deliver spare parts during its full lifecycle. With all these complexities in place, optimizing and parametrizing the planning process is a difficult and time-consuming task. Moreover, the current optimization tool focuses only on one node (each warehouse individually) of the whole Supply Chain, without considering

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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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Mak, Hing-Yin. "System dynamics and discrete event simulation modelling." Thesis, London School of Economics and Political Science (University of London), 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263375.

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This thesis investigates the relationship between discrete event and system dynamics simulation modelling. Each modelling technique has its own strengths and limitations. The choice of using one particular modelling technique often depends on the preference and the knowledge of the modeller rather than on the nature of the problem. The basis of this research has been to address the problem from a different perspective. This has been to look at the nature of the problem first, and then determine the most appropriate modelling technique to apply. The basic method adopted was to compare, contrast

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Fahad, Azeemi Muhammad. "HydraNetSim : A Parallel Discrete Event Simulator." Thesis, KTH, Kommunikationssystem, CoS, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-98905.

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Discrete event simulation is the most suitable type of simulation for analyzing a complex system where changes happen at discrete time instants. Discrete event simulation is a major experimental methodology in several scientific and engineering domains. Unfortunately, a conventional discrete event simulator cannot meet with increasing demands of computational or the structural complexities of modern systems such as peer-to-peer (P2P) systems; therefore parallel discrete event simulation has been a focus of researchers for several decades. Unfortunately, no simulator is regarded as a standard w

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Helal, Magdy. "A hybrid system dynamics-discrete event simulation approach to simulating the manufacturing enterprise." Orlando, Fla. : University of Central Florida, 2008. http://purl.fcla.edu/fcla/etd/CFE0002264.

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Svensson, Harari Natalia. "Manufacturing systems model interoperability in discrete event simulation." Thesis, KTH, Industriell produktion, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91591.

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The use of simulation has been said to be a useful tool to analyze manufacturing systems, Discrete Event Simulation - DES for instance under the occurrence of different events. Information management in Manufacturing Systems is an important issue and so it is insimulation studies because some of the difficulties in building, reusing and integratingsimulation models with other applications used in manufacturing systems are related withthe data. In this context different efforts have been made to facilitate the use of simulationand overcome interoperability problems through improving the informa

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Tsai, Jya-Jang. "Toward automatic parallelization of discrete event simulation programs." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/8302.

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ZOUAOUI, FAKER. "ACCOUNTING FOR INPUT UNCERTAINTY IN DISCRETE-EVENT SIMULATION." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20010506-224248.

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<p>The primary objectives of this research are formulation and evaluation ofa Bayesian approach for selecting input models in discrete-eventstochastic simulation. This approach takes into account the model,parameter, and stochastic uncertainties that are inherent in mostsimulation experiments in order to yield valid predictive inferences aboutthe output quantities of interest. We use prior information to specify theprior plausibility of each candidate input model that adequately fits thedata, and to construct prior distributions on the parameters of eachmodel. We combine prior information with

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Anussornnitisarn, Pornthep. "Empirical comparison of discrete event simulation optimization techniques." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1178741042.

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Wang, Yung-Hsin. "Discrete event simulation on a massively parallel computer." Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/185913.

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Discrete-event simulation appears to be an ideal candidate for parallel processing not only because many large-scale simulations take extremely long execution times on conventional computers but also because the systems being modelled often contain considerable amounts of intrinsic parallelism. Ability to simulate large models in a reasonable time is the motivation for seeking speed advantages offered by parallel computer systems. The Connection Machine is an example of a massively parallel computer with a general communications network in which any processor can communicate with any other tha

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