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Axial Channel Effect on Leakage Reactance in Split-Winding Transformer.
Mrajca, M. ; Cipín, R.
Transformer short-circuit impedance is one of the most important output parameters in the design process. Its value depends mainly on leakage inductance, which is different for one or both shorted output windings during short-circuit test of split-winding transformer with input windings working in parallel. In this paper, an analysis of split-winding transformer with changing axial channel between winding pairs and its effect on leakage reactance has been performed for both shorted outputs. The effect is evaluated with analytical calculations, 3D and 2D finite element method simulations on a typical 5300 kVA three-phase oil transformer. The results show that the channel can’t be neglected in short-circuit calculation and the geometry of the transformer can be simplified to 2D with minimal influence on results.
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Testbed for virtual commissioning of PLC system
Nosek, Jakub ; Arm, Jakub
The work deals with the creation of a testbed for the virtual commissioning of a PLC system. The testbed consists of Unity, a virtual PLC, a Rest API server and a C # application. The production process is simulated at Unity using a Siemens virtual PLC. The data is sent from Unity in JSON format to the Rest API server, where it is read by a C # application and the program is modified if necessary. After editing, the simulation restarts. The testbed is intended to optimize the PLC application, i.e.crisis treatment, collision avoidance and line tact reduction.
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Návrh managementu porostů v převodu na výběrný les na ŠLP Křtiny s využitím růstového simulátoru
Straka, Prokop
On the selected area in the localities of Pokojná hora and Klepačov on the school forest company Křtiny, which are in a stage of conversion to a selection forest there was collected dendrometric data by using the measuring kit Field-Map. This data was consequently processed in the growth simulator SIBYLA, and the scenarios of the growth of the individual sample areas were created. The results of the simulations were then compared in the application STATISTICA 12. As the most suitable concept was selected the one that was closest to the ideal selection forest. It was ascertained that for the stand 109 Cav the best scenario is the Mayer frequency curve type D. For the stand 114 Cav the most suitable concept was found to be the target thickness method.
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Computer simulations of protein structures using coarse-grained models
Halda, Miloš ; Nová, Lucie (advisor) ; Limpouchová, Zuzana (referee)
The main part of this bachelor's thesis is an operational software for coarse- grained protein simulations, suitable for testing of new potential functions. The program is using a pivot-based proposal of new states and Monte Carlo evaluation of the proposed state. The program also allows to use a simulated annealing technique with the linear temperature decrease. Mean estimation and error estimation using the Block Method are implemented for evaluation of the simulations. The software was tested on a several proteins. The simulations provided expected results for shorter chains (88 and less aminoacids), but simulations of longer chains (111 and more aminoacids) have shown the software limitations. Several options for the software improvement regarding the new state proposal for simulations of longer chains were discussed. 1
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Design of heating system of office building
Kovaľová, Silvia ; Plášek, Josef (referee) ; Horká, Lucie (advisor)
The diploma thesis aims to design a heating system in an administrative building and also to create a simulation for this building. The theoretical part describes simulation programs dealing with energy demand and monitoring the internal parameters of the inner climate. The calculation part solves the heating system's design in two heat source variants – a heat pump and a gas condensing boiler. In the last part, there is a model of the building created in WUFI Plus and the simulations are described under different input condition boundaries.
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Care for a patient intoxicated by mushrooms - preparation of simulation scenarios
KOHOUTOVÁ, Denisa
The thesis focuses on patients mushroom poisoning and preparation of simulated scenarios. The thesis is mainly theoretical with addition of two simulated scenarios, which are supported by specialised literature, magazines and Czech or foreign websites. Firstly, intoxications in general overview, symptoms, first aid and treatment are studied. In the next chapters complete overview and description of mushrooms is given, without it the thesis would be incomplete. Lastly, mushroom intoxication, its symptoms, pre-hospital care, treatment and hospital care are described. Mushroom intoxication is immediate life threatening condition, if it is not treated correctly and in time. Suicide and accident can be reasons for this type of intoxication. Early diagnoses of the toxic substance in the mushroom and early treatment are used to treat even the harshest of cases. Most common, however less serious, intoxications are caused by panther cap, this type of mushroom is easily mistaken for blusher. As the most dangerous mushrooms intoxication is considered the one caused by death angel. Death angel consists of high number of toxins and is often mistaken for blusher or champignon. The death doses of this mushroom is estimated to only few tenths of a gram - in other words to one mushroom or less. Consumption of poisonous mushroom mostly affects liver and kidneys. Blood chemistry test, urine test and test of the gastric content are important parts of diagnosing mushroom intoxication. Important step of removing and eliminating toxins from patient's body is invoked vomiting and gastric lavage with administration of bituminous coal. Hospital care provided by nurse is significant part of intoxication treatment. Nurses take care of airways, they monitor basic vital functions, assist during invasive procedure, collect blood samples based on doctor's ordination and they provide hygienic care and decubitus prevention. Diploma thesis can be provided as a textbook material for nurses and paramedics. Mostly in regard to simulated scenarios.
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Studium vlastností zařízení pro odpěňování mléka metodami počítačového modelování
BAIGOZHAYEV, Shong
This diploma thesis studies properties of the milk defoaming equipment by computer modelling. The theoretical part describes the methods and ANSYS software, which was selected as a software environment for simulation of physical processes. The practical part of the work deals with the issue of the static force effect on the device model and the character of fluid flow in the inner side of the functional sample. The discussion section presents graphical results of the simulation and comparison of the initial model with a functional sample. The conclusion of the thesis contains the current problem of the functional sample and a proposal for a solution.
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Virtual reality in psychology and psychotherapy
KAFKA, Dominik
The bachelor thesis deals with the use of virtual reality in psychology and psychotherapy. The design of an overview study was applied and different databases about the current theme were used. It first introduces to the general reader information about virtual reality, its purpose, and aspects. Then follows the chapter on virtual reality in psychology, in which the thesis deals with the advantages and disadvantages of virtual exposure as well as with current psychological research, such as spatial perception or virtual learning environment. The last thematic area is virtual reality and treatment, which is devoted to the treatment of phobias, treatment of post-traumatic stress disorder, substance abuse, pain, obesity and other difficulties for which the effectiveness of the use of virtual exposure was determined. The special emphasis is placed on description of the selected virtual reality applications for the possibility of creating a better idea of the course of its exposure. The following discussion summarizes the findings of the utilize reasearch and also the effectiveness of the use of virtual reality in individual areas of therapy is derived. Current recommendations and potential attributed to individual possibillities of using virtual reality in psychology and psychotherapy are also presented here. The main search keywords include: virtual reality, VR, VRET, psychology, psychotherapy, immersion, therapy, exposure, simulation, and specific keywords needed to complete the content of the sub-chapters.
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Comparison and evaluation of mathematical methods in proceedings
ŽÁKOVÁ, Jana
In the preamble of the report, there are briefly described the basic notions of network analysis (the project and the network graph). Special attention is applied to the deterministic methods (Critical Path Method, Metra Potential Method) and their calculation as well as stochastic method (Program Evaluation and Review Technique, Graphical Evaluation and Review Technique), which are narrowly analyzed in the next chapter of the final report. The last two chapters of this part of the report are focused on the possibilities of simulation at proceedings projects and the software as a fundamental asset for planning and proceedings projects. The second part, which is mainly oriented to the practical points of problem, proposes the answer to stochastic and deterministic project at the application of the simulation technique by means of selected software.
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