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Um simulador para modelos de larga escala baseado no padrão scalable simulation framework (ssf); A large-scale model simulator based on the scalable simulation framework (ssf)

Jahnecke, Alexandre Nogueira
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 06/07/2007 PT
Relevância na Pesquisa
36.36%
Esta dissertação apresenta uma proposta de um simulador de modelos de larga escala para o Ambiente de Simulação Distribuída Automático (ASDA), uma ferramenta que facilita a utilização e o desenvolvimento de simulação distribuída e que vem sendo objeto de pesquisas e estudos no Laboratório de Sistemas Distribuídos e Programação Concorrente (LaSDPC) do ICMC-USP. Tal simulador permite ao ASDA a construção de modelos e programas que simulam modelos de redes de filas de larga escala, operações estas que tornam a ferramenta ainda mais completa. O simulador é baseado no padrão público para simulação distribuída de larga escala denominado Scalable Simulation Framework (SSF). O protótipo do simulador desenvolvido é constituído de um programa cliente-servidor, mas podem ser observados três componentes principais: um compilador, que traduz os modelos escritos em linguagem de modelagem para linguagem C++; o módulo SSF que define a API utilizada pelos programas de simulação; e um módulo de execução, que executa os programas de simulação, analisa os resultados e os repassa para um gerador de relatórios. O simulador contribui ainda com mais estudos acerca de simulação, simulação distribuída e modelagem de sistemas utilizando as ferramentas desenvolvidas pelo grupo; This dissertation presents a proposal for a large-scale model simulator...

Uma Nova abordagem para modelagem e simulação interativa visual; A new approach to visual interactive modeling and simulation

Wagner, Paulo Rech
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Tese de Doutorado Formato: application/pdf
POR
Relevância na Pesquisa
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Nos últimos anos, vários esforços têm sido realizados para desenvolver ambientes de simulação mais amigáveis para seus usuários (modeladores e tomadores de decisões). Técnicas de computação gráfica tem sido largamente utilizadas na interface com o usuário, tanto para a apresentação dos resultados da simulação em pós-processamento ou durante a experimentação, como para a construção de modelos de simulação através de editores gráficos. Desta forma, vários estudos na área de simulação têm sido direcionados para ambientes que ofereçam facilidades para a modelagem e experimentação, trazendo novos conceitos como simulação interativa visual (VIS - Visual Interactive Simulation) e modelagem interativa visual (VIM - Visual Interactive Modeling). A partir de estudos de diversos sistemas e ambientes de simulação, através de uma análise de seus recursos e facilidades disponíveis, são definidos de forma bem clara os conceitos de VIS e VIM. VIM se refere à construção do modelo de simulação com auxílio de recursos visuais e interativos na fase de modelagem, enquanto que VIS se refere a execução do modelo de simulação (usa a descrição gerada em VIM) através de recursos oferecidos na fase de experimentação. Desta forma...

On developing efficient applications using conservative distributed simulation paradigm

Ulson, R. S.; Santana, RHC; Santana, M. J.; Spolon, R.; Kerckhoffs, EJH; Snorek, M.
Fonte: Soc Computer Simulation Publicador: Soc Computer Simulation
Tipo: Conferência ou Objeto de Conferência Formato: 628-632
ENG
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This paper aims to present, using a set of guidelines, how to apply the conservative distributed simulation paradigm (CMB protocol) to develop efficient applications. Using these guidelines, even a user with little experience on distributed simulation and computer architecture can have good performance on distributed simulations using conservative synchronization protocols for parallel processes.The set of guidelines is focus on a specific application domain, the performance evaluation of computer systems, considering models with coarse granularity and few logical processes and running over two platforms: parallel (high performance communication environment) and distributed (low performance communication environment).

Agent based simulation for group formation

Marreiros, Goreti; Santos, Ricardo; Ramos, Carlos; Neves, José
Fonte: European Council for Modelling and Simulation (ECMS) Publicador: European Council for Modelling and Simulation (ECMS)
Tipo: Conferência ou Objeto de Conferência
Publicado em /06/2005 ENG
Relevância na Pesquisa
46.21%
Group decision making plays an important role in today’s organisations. The impact of decision making is so high and complex, that rarely the decision making process is made just by one individual. The simulation of group decision making through a Multi-Agent System is a very interesting research topic. The purpose of this paper it to specify the actors involved in the simulation of a group decision, to present a model to the process of group formation and to describe the approach made to implement that model. In the group formation model it is considered the existence of incomplete and negative information, which was identified as crucial to make the simulation closer to the reality.; Fundação para a Ciência e a Tecnologia (FCT) - ArgEmotionAgents - POSI/EIA/56259/2004.

Simulation of correlated variables: a comparison of approaches with a case study from the Yandi Channel iron deposit.

De-Vitry, Chris
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado
Publicado em //2010
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36.37%
Conditional Simulation of correlated assay variables is a subject of significant recent and current development. The objective of this thesis is to evaluate the available approaches in this area for mining applications. BHP Billiton’s (BHPB) Yandi Channel Iron Deposit (Yandi CID) in Western Australia was selected for these tests. The Yandi CID is 150 km by road North of the town of Newman in the Pilbara region. This channel iron deposit (CID) infills the meandering tertiary palaeochannels of Marillana Creek, which are 450m - 750m wide and approximately 100m deep in the centre. The deposits outcrop as a series of low mesas beside the present day creeks and were divided into three areas (Western, Central and Eastern) within which individual mesas are numbered. A North-South trending part of the channel (mesas C4, and part of C5) is the focus of this study. Drilling of the C4 and C5 mesas is on grids varying from 25m x 50m to 100m x 100m. Although the Yandi CID is mined for iron ore, the concentrations of the contaminants Al₂O₃, SiO₂ and P₂O₅ are economically critical. The loss on ignition (LOI), while not strictly speaking a contaminant, is also an important product characteristic for iron ore customers. The correlations between the assay variables and their relative abundances vary from sample to sample. For resource modelling...

Small-satellite propulsion system modelling and simulation of orbital navigation determination; A feasibility study

Zhang, L.; Anvar, A.
Fonte: The Modelling and Simulation Society of Australia and NZ; Australia Publicador: The Modelling and Simulation Society of Australia and NZ; Australia
Tipo: Conference paper
Publicado em //2011 EN
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The size and weight of Satellites are currently being miniaturised in order to meet the purpose of lowering cost and saving production time. For this situation, a type of Small-Satellite known as the CubeSat has been identified. This kind of small-satellite is 10 cm3 cube of less than 1.33kg. Due to its limitations on overall mass and dimensions, the CubeSat uses nanotechnology components for the interior design. Therefore, an appropriate design is a crucial aspect of any CubeSat project. According to space vehicle research and development criteria, the simulation and modelling of the subsystems of CubeSat is both significant and necessary. This paper investigates a feasibility study and demonstrates the simulation of Small-Satellite orbital navigation determination and Propulsion system modelling.; Lize Zhang and Amir Anvar

Integrated submarine performance simulation

Tetlow, M.; Howard, C.; Green, J.
Fonte: The Modelling and Simulation Society of Aust & NZ; Australia Publicador: The Modelling and Simulation Society of Aust & NZ; Australia
Tipo: Conference paper
Publicado em //2013 EN
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The procurement planning for high value assets, such as submarines, naval surface ships, aircraft, etc. requires rigorous analysis to ensure that the operation of the platform and its sub-systems meet the capability requirements, based on measures of performance. Measures of performance are identified and defined in a capability analysis, which is not in the scope of the present study. Once the measures of performance have been established, a submarine simulation model can be used to assess the performance of a given design against the measures of performance. Subject matter experts are able to develop high fidelity models of submarine performance and operations. An efficient way to integrate these high fidelity models, to develop a whole-of-submarine simulation model, is to use an integration tool such as Phoenix Integration Model Center. This integrated tool can be used to perform analysis and parameter sensitivity studies to provide a better understanding of the design space. In this paper, a submarine simulation model is developed, using Phoenix Integration Model Center, based on sub-system models developed by subject matter experts. The software tool is validated by comparing the designs to several previous designs described in the public literature. The tool is then applied to a case study...

Small-satellite magnetorquer attitude control system modelling and simulation

Yi, X.; Anvar, A.
Fonte: The Modelling and Simulation Society of Aust & NZ; Australia Publicador: The Modelling and Simulation Society of Aust & NZ; Australia
Tipo: Conference paper
Publicado em //2013 EN
Relevância na Pesquisa
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The field of Ocean Robotics Engineering is expanding rapidly and there is demand for low cost, compact and light-weight small-satellites to communicate with remote ocean bound devices. This paper discusses the work carried out with the school’s microsatellite group and focusses on the attitude control system which is vital for accurate satellite operation. Establishing a mathematical model for micro-satellite attitude control system contains positioning sensors system, kinematic and dynamic concept of the attitude and statistic processing methods and so on. In this dissertation, based on the Euler angle and Quaternion principles, we built the attitude kinematic model. By considering the magnetometers data and Fuzzy Control method the attitude estimation, was studied and investigated. The paper would also provide a brief investigation towards the modes of attitude control process and analysis. The result of unloading of a momentum wheel by magnetic rotation and precession damping is studied using Simulink. The control system model is included with relationship of three-axis motion simulation, to determine the pitch-channel and roll-yaw channel respectively. This process would define the stability controller problem of wheel unloading and protected mode for small-satellite stabilization.; http://www.mssanz.org.au/modsim2013/index.html; Xiaoguang Yi and Amir Anva; 22nd National Conference of the Australian Society for Operations Research — ASOR 2013 DSTO led Defence Operations Research Symposium — DORS 2013

Intelligent submersible manipulator-robot, design, modeling, simulation and motion optimization for maritime robotic research

Guo, P.; Anvar, A.; Tan, K.
Fonte: The Modelling and Simulation Society of Aust & NZ; Australia Publicador: The Modelling and Simulation Society of Aust & NZ; Australia
Tipo: Conference paper
Publicado em //2013 EN
Relevância na Pesquisa
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With the recent technological advancement in submersible systems, the research and development of underwater manipulator robot is highly desirable. This paper focuses on comparing simulation versus real-time manipulator dynamics control, and comparison of intelligent underwater manipulator-robot for effective Ocean-based research, industrial and defense applications. Software package such as MATLAB is used to simulate the results of underwater manipulator performances and compare it with the real-time trials. A mathematical model for underwater manipulator which encompasses deriving modified Denavit-Hartenberg parameters, computing all transformation matrices, deriving the forward kinematic and generating trajectory. Base on cubic polynomials, the manipulator trajectory is generated by using the joint angles and translation of each trajectory point. The result of manipulator performances is simulated by using SIMULINK. The manipulator simulation, which is aimed to analyze the movement of each arm, through the parameters of locations, velocity and torques are obtained. This paper also includes the comparison of manipulator-robot performance simulation with real-time trials. In order to measure the results of real-time, the Nintendo Wii remote is attached to manipulator to record the performances. The comparison can reveal the differences between simulation and real-time test in order to optimize for underwater manipulator.; http://www.mssanz.org.au/modsim2013/index.html; Peiwen Guo...

Interaktive Simulation biomechanischer Bewegungsabläufe; Interactive simulation of biomechanical movements

Hans, Torsten
Fonte: Universidade de Tubinga Publicador: Universidade de Tubinga
Tipo: Dissertação
DE_DE
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Ziel dieser Arbeit war die Entwicklung eines allgemeinen biomechanischen Menschmodells, das unter dem Gesichtspunkt einer schnellen interaktiven Simulation in Wechselwirkung mit seiner Umwelt treten kann. Schnell bedeutet hierbei, dass spätestens innerhalb von wenigen Sekunden das gewünschte Simulationsergebnis vorliegt. Interaktiv heißt zum einen, dass während der Berechnung jederzeit eine grafische Darstellung der Simulationsszene erfolgt und zum anderen, dass der Anwender während der Simulation die Möglichkeit hat aktiv einzugreifen. Die Genauigkeit der Simulation wird dabei keineswegs vernachlässigt werden. Erreicht wird dies vor allem indem bei der Kollisionserkennung neue Wege gegangen werden und bei der Aufstellung der Bewegungsgleichungen eine spezielle Struktur erstellt wird. Dabei wird eine starke Verknüpfung zwischen der 3-dimensionalen Grafik und der Simulation hergestellt, so dass beide eng miteinander verbunden sind. Das heißt zum einen, dass die physikalischen Parameter wie zum Beispiel Masse und Trägheitstensor direkt aus der 3D-Flächendarstellung eines Körpers berechnet werden und zum anderen, dass die Simulation die 3D-Grafik verwendet um eine Wechselwirkung des Menschmodells mit der Umwelt und sich selbst herzustellen. Für biomechanische Simulationen sind vor allem die Kenntnis bzw. Rekonstruktion der inneren Momente des Menschen bei bestimmten Bewegungsabläufen interessant. Am Beispiel einer aktiven Vorwärtssimulation eines Reckturners wird die Einsetzbarkeit des hier entwickelten Verfahrens zur Rekonstruktion von inneren Momenten demonstriert. Weitere Ziele der biomechanischen Menschsimulation sind ausgiebige Parameter- und Sensitivitätsanalysen ohne die eine Simulation nicht validiert werden kann. Dies soll am Beispiel von Fussgänger-PKW Unfallsimulationen demonstriert werden.; The goal of this thesis was the development of a general biomechanical human model computer simulation...

Delta3D: a complete open source game and simulation engine for building military training systems

McDowell, Perry; Darken, Rudolph; Sullivan, Joe; Johnson, Erik
Fonte: Society for Modeling and Simulation International Publicador: Society for Modeling and Simulation International
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
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Dela3D, the open source game and simulation engine built for military training, in continuing to be improved to meet the requirements of the military users. The most recent upgrades, available in versions 1.4 and later, include adding capability for After Action Rerview, integration with SCORM-compliant learning management systems (LMS's), and distributed interactive simulation (DIS) networking. Additionally, more applications, created by both government users and civilian companies, continue to be built using Delta3D and its expanding capabilities. With these added features, Delta3D has become the engine of choice for several military simulations, including programs of record. The developers and program managers of these programs were attracted by its advanced technical features, its lack of proprietary vendor lock-in and licensing fees, and the ability to quickly produce sophisticated applications using Delta3D. This paper discusses the current state of Delta3D version 1.4 and how developers and program managers can use Delta3D to quickly and cheaply build complex training systems. It will also briefly touch uopn the systems currently being built using Delta3D and how some of these have been proven to work in a training environment. It will also discuss what improvements to the engine will be added in the near future.

STAFFSIM, an interactive simulation for rapid, real time course of action analysis by U.S. Army Brigade Staffs

Bohman, William E.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xi, 112 p.
EN_US
Relevância na Pesquisa
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Approved for public release; distribution is unlimited; The U.S. Army has fielded a wide range of simulations for tactical units. The purpose of these simulations range from training individual skills to collective training for corps staffs. Currently fielded simulations are not designed for operational use. Most are operated by contract civilian personnel and require fixed base facilities. Furthermore, many of these simulations require extensive lead-time to initiate useable scenarios. When the army rolls to the field, its simulations are left behind. The army's staff planning process places huge cognitive demands unit staffs, often resulting in sub optimal decision making. Simulations can provide a useful tool to help staffs visualize and understand complex time-space relationships and unit interactions. Eliminating the need for these factors to be visualized in the mind's eye allows staffs to focus their cognitive abilities on synchronizing mission plans. This thesis develops a prototype simulation for operational use by brigade staffs. The simulations purpose is course of action analysis as described in the war gaming step of the staff planning process. To be used operationally, the simulation must be easy to use, provide rapid scenario development...

Assessing neurophysiologic markers for training and simulation to develop expertise in complex cognitive tasks

Sullivan, Joseph A.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Formato: xvi, 163 p. : ill.(some col.); 28 cm.
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This work explores the theoretic basis and provides empirical support for using neurophysiologic markers to provide information on a trainee's cognition to guide instruction. This serves as the basis for improving the design of simulation responsive to individual traits for training continuous complex cognitive tasks. Individualized instruction has been empirically proven to be vastly superior to other forms of instruction. However, current methods to design simulation that is responsive to the user have relied primarily on raw performance metrics. These metrics are often misleading and provide very little diagnostic value. For complex tasks, understanding cognitive processes is critical. Neurophysiologic markers can potentially inform instructional systems on trainees' cognition but have yet to be validated. This research developed a sample process to identify neurophysiologic markers for informing individualized instruction. Applying the process to helicopter overland navigation, a theoretic model of eye scan behavior was developed. The process and theoretic model were validated by analyzing novices and expert navigators. Predicted eye scan metrics reliably distinguished between expert and novice behavior, providing insight not available using raw performance metrics. Also...

A training transfer study of simulation games

Brown, Benjamin J.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xxii, 285 p. : col. ill. ;
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Approved for public release; distribution is unlimited; Throughout history, military warriors have used games to accomplish training objectives. Recently, personal computer-based games have emerged as viable training platforms. In this research project, we evaluated the training effectiveness of simulation games using a particular proprietary first-person view tactical trainer called Virtual Battlespace 2TM. Specifically, we examined squad level tactical maneuver of a combat convoy in a semi-permissive environment. We found that personal computer-based gaming was at least as effective as traditional training methods such as the sand table for preparatory tactical training. We found that trainees felt better trained after operating in the virtual environment. We also conducted an experiment to determine the extent to which the training of the simulation controller influences the effectiveness of the simulation. We found that the facilitator role can detract from a trainer's focus and that the trainer's practice and experience greatly affect the simulation training. Our findings justify the use of personal computer-based games for small unit tactical training. We conclude that personal computer-based gaming at the unit level can be a training multiplier...

A simulation tool for the duties of computer specialist non-commissioned officers on a Turkish Air Force Base

Camur, Serhat.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xx, 75 p. : col. ill. ;
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Approved for public release, distribution unlimited; Staff assignment is one of the major problems in many lines of business. Knowing that the human being is one of the most expensive and demanding resources, efficient personnel employing becomes significant. Simulation techniques can help accomplish effective staff assignments. The aim of this thesis is to create a simulation tool by using a prototypical model of the computer system specialist non-commissioned officers' jobs on a Turkish Air Force Base, and to identify the effective factors on computer specialist shortage problem. This aim is accomplished by using event graph and discrete event simulation techniques for modeling purposes, and Simkit and Viskit for implementing the created model into simulation code. After evaluating the simulation results from an experiment involving fifteen input factors, it was concluded that the staff shortage problem can be addressed by using this study after updating the parameters used in the model to reflect the most recent distributions. On the other hand, increasing the number of personnel is not the only solution for addressing the problem. There are some other ways suggested by the study to improve the measure of effectiveness values...

Airlift operations modeling using Discrete Event Simulation (DES)

Foong, Yew Chong
Fonte: Monterey, California; Naval Postgraduate School Publicador: Monterey, California; Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xviii, 149 p. : ill.
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The recently completed integrated project by the Systems Engineering and Analysis Cohort 15 at NPS has devised a regional Maritime Theater Security Force to conduct Phase Zero operations based on a tasking from OPNAV N8F. The force's airlift capability was identified as a critical component in the accomplishment of the missions and the required force structure was determined using a mix of mathematical and linear optimization modeling. The goal for this thesis is to develop a stochastic model using Discrete Event Simulation (DES) that can be employed to analyze the devised force structure's airlift operation performance at the operational/tactical level to augment the analysis work performed under that project. The intent is to provide a more complete solution for any stakeholders who want to take the project further to the next level. The resulting model demonstrates the ability to measure the airlift operation performance and provide insights into the operation workflow efficiency. The experiments conducted support the earlier findings on the devised Phase Zero force's ability to meet the most stringent mission requirements but suggested a different maximum airlift capability.; Singapore Defence Science and Technology Agency author (civilian).

Neutron Background Simulation for the CRESST - II Experiment; Simulation des Neutronenuntergrundes für das CRESST - II Experiment

Scholl, Stephan Michael
Fonte: Universität Tübingen Publicador: Universität Tübingen
Tipo: Dissertation; info:eu-repo/semantics/doctoralThesis
DE_DE
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In dieser Arbeit wird die Simulation des durch Neutronen induzierten Untergrunds für das CRESST-II Experiment zum direkten Nachweis dunkler Materie behandelt. Der von Neutronen induzierte Untergrund stellt einen fundamentalen, irreduziblen Untergrund für alle Experimente dar, die Dunkle Materie über die Messung der Rückstoßenergie eines streuenden Kerns nachweisen wollen. In dieser Arbeit geht es insbesondere um die Fragestellung, inwiefern die vom CRESST - II Experiment beobachteten Ereignisse durch Neutronenstreuung erklärbar sind. Die astrophysikalische Motivation zur Suche nach dunkeler Materie} ist in dem heutigen kosmologische Standardmodell LambdaCDM gegeben, welches die Existenz dunkler Materie postuliert, welche weder elektromagentisch noch stark wechselwirken darf. Desweiteren muss die dunkele Materie kalt sein, denn Teilchen mit relativistischen Energien sind mit der beobachteten Strukturbildung im Universum nicht vereinbar. Sowohl supersymmetrische Modelle als auch Theorien mit zusätzlichen Dimensionen erlauben stabile Teilchen mit Massen zwischen 50 GeV und einigen TeV, diese als WIMPs (Weakly Interacting Massive Particle) bezeichneten Teilchen sind grundsätzlich auch experimentell beobachtbar. Das CRESST -- II Experiment versucht den direkten Nachweis der schwache Wechselwirkung der WIMPs durch die Detektion des gestreuten Kerns. Das Experiment zeichnet sich durch eine hervorragende Diskriminierung des elektromagnetischen Untergrunds von Kernrückstössen aus. Ein nichtdiskriminierbarer Untergrund ist durch neutroneninduzierte Kernrückstösse gegeben. Die Analyse der Wechselwirkung der Neutronen mit dem Aufbau des Experimentes und insbesondere die Energiedeposition in den verwendeten Detektoren erfordert den Einsatz von Monte - Carlo Simulationen. Hierbei wird das in der Teilchenpysik weit verbreitete GEANT4 Programmpaket verwendet. Die Implementierung der Neutronenstreuung innerhalb von GEANT4 wird getestet und die notwendige Verbesserung des Programmcodes für die inelastische Neutronenstreuung in GEANT4 vorgestellt. Der getestete und verbesserte Code wird dann zur Simulation der bekannten Neutronenquellen für den CRESST - II Aufbau verwendet: - Neutronen...

Simulation sickness comparison between a limited field of view virtual reality head mounted display (Oculus) and a medium range field of view static ecological driving simulator (Eco2)

AYKENT, Baris; YANG, Zhao; MERIENNE, Frédéric; KEMENY, Andras
Fonte: Society for Modeling & Simulation International Publicador: Society for Modeling & Simulation International
EN
Relevância na Pesquisa
46.24%
In this article, an experimental procedure is presented in order to evaluate the role of having HMD oculus and (Eco2 driving simulator) in terms of driving simulation sickness. The driving simulation sickness is investigated with respect to SSQ (simulator sickness questionnaire) and vestibular dynamics (head movements) of the driver participants for a specific driving scenario. The scenario of driving task is created by using open source “iiVR (institut image virtual reality)” software which is developed by Institut Image Arts et Métiers ParisTech. The experiments are executed in static mode for the driving simulators.

SIMOO : plataforma orientada a objetos para simulação discreta multi-paradigma; SIMOO: object oriented environment for multi-paradigm event discrete simulation

Copstein, Bernardo
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Tese de Doutorado Formato: application/pdf
POR
Relevância na Pesquisa
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Analisando-se a literatura de simulação discreta pode-se observar que os autores, em geral, constroem seus modelos de simulação baseados em abordagens tradicionais e aceitas tais como orientação a eventos, orientação a mensagens, orientação a filas, etc. Mais recentemente encontram-se ambientes que afirmam utilizar o chamado paradigma de simulação orientado a objetos. No entanto não existe consenso na definição de tal paradigma e diferentes interpretações podem ser encontradas. Considerando que um modelo de simulação pertence a classe dos sistemas de software, nada mais natural do que aplicar conceitos de orientação a objetos em seu desenvolvimento. Deve ficar claro, entretanto, que existe uma grande diferença entre um paradigma de simulação, isto é, as idéias e recursos usados na construção de um modelo, e um paradigma de projeto e implementação aplicado ao desenvolvimento de sistemas de simulação. Linguagens orientadas a objetos podem ser aplicadas na implementação de sistemas de simulação que utilizam conceitos de modelagem distintos. Ainda que todos possam ser chamados de sistemas orientados a objetos, pode haver confusão quanto ao significado do termo simulação orientada a objetos. Este trabalho apresenta um esquema original de classificação para sistemas de simulação quanto a sua arquitetura de software onde são considerados aspectos tais como a maneira pela qual as entidades do modelo se comunicam e a forma pela qual se descrevem os eventos que alteram seu estado...

System-dynamics-based modeling of business simulation algorithms

Gold, Steven
Fonte: ACM - Simulation and Gaming Publicador: ACM - Simulation and Gaming
Tipo: Artigo de Revista Científica
EN_US
Relevância na Pesquisa
46.12%
Research on the internal algorithms used to model business simulations have focused on individual components of the business system. Yet the business environment is complex in nature, characterized by interdependencies and nonlinear relationships that require a systems approach if effective game design is to be achieved. In this article, a system-dynamics-basedd interactive model of a business enterprise simulation is developed consisting of 18 equations. The model draws heavily on the economic theory of the firm and the expansive body of prior research on the design of business simulations. The focus is on the linkages between the production, cost, revenues, profits, and stock market value of the firm. A working model of the recommended system is tested, and its empirical properties are discussed. It is found that to develop effective algorithms within each functional area of business, the dynamic impacts on the whole enterprise must be evaluated.