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Fractal capacitors properties
Chvíla, Ladislav ; Sedlák, Petr (referee) ; Hruška, Pavel (advisor)
This work is focused on computer simulations of fractal capacitors. The geometry of capacitors and its influence is investigated. Simulations are realized in programs Matlab, SolidWorks and Comsol Multiphysics. There are also several specific examples of different geometrics of capacitors their comparisons and assessment.
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Direct digital frequency synthesizer with external synchronizing
Buš, Ondřej ; Viščor, Ivo (referee) ; Kasal, Miroslav (advisor)
This thesis deals with problematics of direct frequency digital synthesis. Principle and basic characteristics of this method of signal generating are explained in the introduction. It considers impact on purity of spectrum of output signal. Next chapter considers conception of the generator, namely choice of DDFS circuit and other basic blocks. Design of frequency multiplier, reconstruction filter and power amplifier are included. It also deals with choice of control circuit. The device is controlled by computer through USB. There was created user programme for this purpose. Measured characteristics are stated at the end of the work. This work includes schemes of connetions of designed parts including simulations and measured parameters.
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Computer Poker
Kýpeť, Jakub ; Surynek, Pavel (advisor) ; Toropila, Daniel (referee)
The present work describes a design and an implementation of environment for playing Texas Hold'em poker, including design and implementation of a system that simulates a player of this game. This system consists of three developed strategies, using all resources described in the work. The various strategies that we have developed, we have tested on a few games. The results obtained from the tests are analyzed and then compared with our assumptions and expectations. This work also consists a description of existing programs that are about same topic and then comparation with our application.
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Mechanisms for operating system virtualization
Děcký, Martin ; Tůma, Petr (referee) ; Yaghob, Jakub (advisor)
Overview and taxonomy of the technologies used for virtualizing the execution of operating systems (running multiple operating systems or multiple separated operating system contexts simultaneously on a single computer), comparsion of the speed, security, determinism, level of isolation, accounting posibilities, supported platforms, level of hardware emulation, etc. Inherent problems of virtualization (platform dependency, SMP, virtual hardware). Emulation, simulation, virtual machines, paravirtualization, partitioning. Overview of commonly available virtualization products (Bochs, QEMU, Simics, VMware, Virtual PC, Virtual Server, OpenVZ, Denali, Mac on Linux, PearPC, Plex86, Xen, TRANGO, UML, Linux VServer, FreeBSD Jails, Solaris Zones) and their comparsion. Hardware assisted virtualization (Power Hypervisor, V86, Vanderpool, Paciffica) and their usage. Practical demonstration of soft-partitioning (parcelling of the operating system into separate kernel contexts) on SPARTAN kernel.
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Urgent and follow-up measures in case of chlorine leakage - a retrospective analysis of past cases
KLIMEŠOVÁ, Jitka
This thesis deals with the urgent and follow-up measures in case of chlorine leak and a retrospective analysis of past cases. Chlorine is a widely used toxic gas. It is known from history as the first practically used warfare agent. Today, it is an important chemical raw material that is used widely in industry. It is also commonly transported by road and rail. It is one of the substances whose leakages occur very often. The objective of this paper is to assess the impacts of chlorine leakage on the lives and health of people and to provide an overview of urgent and follow-up measures in case of chlorine leakage in the perspective of the integrated rescue system and the general public. In addition, to locate, describe and analyze past cases. The theoretical part contains information about chlorine, the principles of behaviour of the population in case of an accident with chlorine leakage and an overview of measures undertaken at the site of chlorine leakage. Through studying available literature and resources on the Internet, overview of major chlorine leakages in the Czech Republic as well as abroad has been created. Selected events are described in detail. The practical part simulates, using computer programme called TerEx, a chlorine leakage from a water treatment plant in Písek, South Bohemia. To compare the results, several model situations were created with varying amounts of chlorine leaked at different times of accident and atmospheric conditions. A specific example is used to assess the risks to people living near the plant and to outline the urgent and follow-up measures.
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Design and optimization of the helical antenna
Zelinková, Lenka ; Olivová, Jana (referee) ; Lukeš, Zbyněk (advisor)
The thesis contains the design of helical antennas for the assigned frequencies. The theoretical design is verified by parameter calculators. The design properties were verified in the computer simulator CST Microwave studio where the antennas were optimized to the maximum gain. The antennas intended as parabola feeds are completed with the designs of parabolas and focal distances between the antennas and the parabolas. Impedance matching by a quarter-wave transformer is designed for the antennas.
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Mean areal precipitation method impact on runoff simulation
Janková, Jana ; Daňhelka, Jan (advisor) ; Čekal, Radek (referee)
Work presents physical geography of the Úpa River basin from the point of view of geology, geomorphology and soil characteristics. Climate, hydrography and hydrology are described in more detail. Úpa River basin is specific in its shape and position in the headwater where runoff is generated. Four sub-basins (Horní Maršov, Horní Staré Město, Slatina nad Úpou and Zlíč) were used for evaluation of mean areal precipitation (MAP) computation method impact on simulated flows. MAPs were computed for four intense rainfall episodes using arithmetic, Thiessen polygon and different settings of inverse distance method (= 2 or 3). These MAPs enter into hydrological forecasting and modeling system AquaLog that includes rainfall runoff model SAC-SMA. AquaLog and SAC-SMA are also described in this thesis. Modeled runoff series (based on different initial conditions) were analyzed in the meaning total runoff, peak flow, and fast runoff components (surface, sub-surface and direct). Results show that optimal results in the higher part of the basin provide inverse distance method with set to 3. Powered by TCPDF (www.tcpdf.org)
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Distance measurement between nodes in IP networks
Šimák, Jan ; Novotný, Vít (referee) ; Komosný, Dan (advisor)
This thesis deals with delay prediction issue between nodes on the Internet. Accurate delay prediction helps with choosing of the nearest internet neighbor and contributes to effective usage of network sources. Unnecessary network load is decreased due to algorithms of delay prediction (no need for many latency measuring). The thesis focuses theoretically on the three main algorithms using coordinate systems - GNP, Vivaldi, Lighthouses. Last one is at the same time the main subject of the thesis too. Algorithm Lighthouses is explored in detail theoretically and in practise too. In order to verify the accurate of delay prediction of Lighthouses algorithm the simulation application was developed. The application is able to compute node coordinates of synthetic network using Lighthouses algorithm. Description of simulation application and evaluation of simalution results are part of practice part of this thesis.
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Evolutionary development of robotic organisms
Leibl, Marek ; Mráz, František (advisor) ; Holan, Tomáš (referee)
This work introduces a system for an evolutionary design of virtual organisms capable of effective movement in a simulated environment. The morphology and the control system are simultaneously developed by an evolutionary algorithms. The system also allows to design organisms in an editor and evolution of the control system with an immutable morphology. The quality evaluation and viewing of evolved organisms is done in a simulated 3D physical environment. The work put stress on the optimization of time and computing complexity of the evolutionary process. This optimization is achieved by using symmetry of organisms and their movement with HyperNEAT-generative encoding of synaptic values. Further optimization is achieved by limiting the variety of mutual module connections and focusing on the harmonic movement of organisms.
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Parallelisation of Ultrasound Simulations on Multi-GPU Clusters
Dujíček, Aleš ; Kula, Michal (referee) ; Jaroš, Jiří (advisor)
This work is part of the k-Wave project, which is a toolbox designed for time ultrasound simulations in complex and heterogeneous media. The simulation functions are based on the k-space pseudospectral method. The goal of this work is to compute these simulations on graphics cards using local domain decompostion. Thanks to decomposition we could compute these simulations faster, and on larger data grids. The main goal of this work is to achieve efficiency and scalability.
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