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City Traffic Simulator
Dostál, Martin ; Dalecký, Štěpán (referee) ; Rozman, Jaroslav (advisor)
This thesis is focused on microsimulation of city traffic, specifically a small city circuit in Brno. The thesis describes approaches for solving the problem of road network representation and presents basic methods and models needed for traffic simulation on the level of individual vehicles control as well as on the level of simulator control. In the case of more possible solutions to the given problem, the features and suitability of these solutions are compared. In the practical part of the thesis, the structure of the proposed simulator is presented with all the dependencies among individual submodels, along with the description of implementation details related to the individual parts.
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Discrete Simulation in Java: Process Scheduling
Skočovský, Peter ; Kočí, Radek (referee) ; Martinek, David (advisor)
This thesis deals with process scheduling implementation for discrete simulation in Java. Two approaches are considered: process implementation using threads and process implementation without threads. Main problem of using threads was to ensure cooperative switching. Processes implemented without threads are divided into atomic parts and suspend can be performed only between these parts. Test results show that implementation using threads is considerably slower and consumes more memory.
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OMNeT++ Extension with ACL Filtering Module
Suchomel, Tomáš ; Ryšavý, Ondřej (referee) ; Matoušek, Petr (advisor)
This bachelor's thesis describes discrete simulation of network in OMNeT++. We are exploring effective representation and evaluation of ACL rules by advanced data structures based on interval decision diagrams. OMNeT++ is extended by filtering properties of packets using access control lists. Because ACL filtering is not supported in OMNeT++, it was added as a brand-new module, whose concept and implementation is described here. Practical usage of the implemented module is demonstrated on a simulation of real nontrivial network. We also analyse results of the simulation and verify them by comparison with real network behaviour.
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Modelling OSPF Routing Protocols Using OMNeT++ Simulator
Danko, Martin ; Matoušek, Petr (referee) ; Ryšavý, Ondřej (advisor)
Open Shortest Path First (OSPF) is a dynamic, hierarchical routing protocol designed to support routing in TCP/IP networks. There is a deliberate need for large-scale simulation of OSPF protocol in order to understand its dynamics. Content of this bachelor's thesis is modeling and simulation of OSPF protocol in discrete event simulation system OMNeT++. The main focus is to give an insight of the architecture of the existing implementation in module OSPFRouting. The module OSPFRouting is also validated against OSPF implementation on the real routers. Next, the usage of OSPF simulation is demonstrated on the specific experiments.
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Discrete Simulation of Programmable Systems
Mynář, Pavel ; Zuzaňák, Jiří (referee) ; Mlích, Jozef (advisor)
The subject of this thesis is the design and implementation of software library for discrete simulation of programmable units and their mutual communication and implementation of several illustrative examples based on it. The library is designed to be platform independent and as robust and simple to use as possible.
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Modelling of OSPFv3 Link-State Routing Protocol
Mrázek, Jakub ; Grégr, Matěj (referee) ; Veselý, Vladimír (advisor)
OMNeT++ is a discrete event, modular simulator often used for simulation of computer networks. The universal simulator can be extended by various packages, such as INET framework, which is used for simulation of devices and TCP/IP protocols. This thesis examines facilities of INET package in the routing that is dynamic routing protocols. Concretely, it aims at OSPF protocol for IPv6 networks (OSPFv3). The protocol is presented and its principles are interpreted. The work is designed to simulate the module OSPFv3 protocol and module is partially implemented.
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Design of Digital Circuits at Transistor Level
Kešner, Filip ; Šimek, Václav (referee) ; Vašíček, Zdeněk (advisor)
This work aims to design process of integrated circuits on the transistor level, specially using evolutionary algorithm. For this purpose it is necessary to choose reasonable level of abstraction during simulation, which is used for evaluation candidate solutions by fitness function. This simulation has to be fast enough to evaluate thousands of candidate solutions within seconds. This work discusses already used techniques for transistor level circuit design and it chooses useful parts for new design of faster and more reliable automated design process, which would be able to design complex logic circuits. The thesis also discusses implementation of this system and used approach with regard to encountered problems in transistor-level circuit design and optimization by evolution.
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Simulation of Network Behaviour Based on Analysis of Configuration of Active Network Devices
Macků, Jiří ; Ryšavý, Ondřej (referee) ; Matoušek, Petr (advisor)
This masters thesis describes simulation of network using Network Simulator. Model of network and description of simulation is extracted from the analysis of configuration files of active network devices, and translated by a parser. Concept and implementation of the parser is described here. Because IPv4 addressing is not supported in Network Simulator, it was added as a new module. The Network Simulator is also extended by filtering properties of packets using access control lists. Practical usage of the implemented modules is demonstrated on a simulation of real network.
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Employee scheduling: application of selected methods of Operations Research
Picková, Veronika ; Kuncová, Martina (advisor) ; Houška, Milan (referee)
The aim of this Master's Thesis is to create an employee shift work schedule by using selected methods of operations research. The first part is theoretical and deals with the introduction into operational research, specifically in the field of mathematical programming and simulation models, including the possibility of computer processing. This first part highlights important subjects that will be used in the second part, which is practical and is solving a specific problem. Firstly, Cinema City Flora, which provided data for the analysis, is presented. Then there is a solution of the problem in the add-in Solver in MS Excel, and then in the program LINGO. After, a discrete simulation is created in the program SIMUL8. In conclusion, there is a summarization of the main findings and recommendations, comparison of selected methods and their applicability in practice and possibilities of further research.
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Comparison of alternative lift operation design using simulation
Jedlička, Martin ; Zouhar, Jan (advisor) ; Fiřtová, Lenka (referee)
The topic of this thesis is vertical transportation where multiple elevators are controlled by group traffic control. The elevators controlled by group traffic control are coordinated in order to work more efficiently than elevators that are only physically placed next to each other. The objective of this thesis is creation of a program, which allows modelling of operation of a lift triplex situated in Rajská building in Žižkov campus of the University of Economics in Prague. Applied method is discrete simulation performed in R software. Created script allows simulation of operation of elevators according to several described algorithms and subsequent comparison of their influence on the performance of the system. Using simulations the most suitable group traffic control is found and it is shown that shared memory used for cooperating units positively influence the service.
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