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Efficiency map of synchronous machine
Gargulák, Jiří ; Marada, Tomáš (referee) ; Pruša, Radomír (advisor)
Subject of this bachelor thesis is application of interpolation on efficiency maps of synchronous servo-engines. Nearest neighbor interpolation, inverse distance weighting and bilinear interpolation is used. Another part of this thesis is measuring on drive of one axis on machine tool, which is made out of frequency convertor, synchronous engine and a ball screw. Also another subject of this thesis is research of power losses in synchronous engine, frequency convertor and ball screw.
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Influence of spatial snow distribution on flood course
Kučerová, Dana ; Jeníček, Michal (advisor) ; Langhammer, Jakub (referee)
For the purpose of hydrological forecasting on mountains' and sub-mountains' rivers is important knowledge of distribution of snow water equivalent in the watershed. Submitted thesis therefore deals with comparison of 9 interpolation methods in terms of quality of their forecasting when predicting snow depth and snow water equivalent in watershed Bystřice (127,6 km2 ), which is situated in the northwest of Bohemia in the Ore mountains. Point data of snow depth and snow water equivalent used in interpolation were sampled during an off- road measuring in 17. 2. 2010 at the 14 snow sampling locations. The interpolation methods were: (1) Thiessen's polygons, (2) inverse distance weighting, (3) global polynomial (4) local polynomial (5) radial basis functions, (6) ordinary kriging, (7) cokriging, (8) residual kriging and (9) orographic interpolation. Independent variable-altitude used in the calculation of snow depth and snow water equivalent was used only in the last three listed methods. Predictive ability of interpolation methods was evaluated by using cross-validation and visual comparison of predicted maps. The best prediction ability was provided by residual kriging and orographic interpolation. The geostatistical methods were next in the order. The method of Thiessen's polygons and inverse distance...
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Research of Algorithms for Improvement of Rainfall Calculation Based on Crossing of Microwave Links
Vomočil, Radek ; Mikulášek, Michal (referee) ; Bubniak, Milan (advisor)
Even in modern times, the exact rainfall calculation is an area containing a number of challenges. Although it may seem that the combined technologies for rainfall estimation are sufficiently accurate, in recent years there have been opportunities to further complement and refine the rainfall estimation through so-called opportunistic methods. This work deals with the creation of a new algorithm for the distribution of rainfall intensity within the framework of rainfall measurement through a network of microwave links. The theoretical part of the work deals with the possible ways in which the algorithm can be created and in what ways the calculation of rainfall can be approached. The practical part first deals with the creation of an algorithm for the linear distribution of rainfall intensity in 2D space along the route of the microwave link, based on the input parameter of the interval length. This is followed by the creation and implementation of an algorithm for the distribution of rainfall intensity based on the crossing of microwave links.
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Research of Algorithms for Improvement of Rainfall Calculation Based on Crossing of Microwave Links
Vomočil, Radek ; Mikulášek, Michal (referee) ; Bubniak, Milan (advisor)
Even in modern times, the exact rainfall calculation is an area containing a number of challenges. Although it may seem that the combined technologies for rainfall estimation are sufficiently accurate, in recent years there have been opportunities to further complement and refine the rainfall estimation through so-called opportunistic methods. This work deals with the creation of a new algorithm for the distribution of rainfall intensity within the framework of rainfall measurement through a network of microwave links. The theoretical part of the work deals with the possible ways in which the algorithm can be created and in what ways the calculation of rainfall can be approached. The practical part first deals with the creation of an algorithm for the linear distribution of rainfall intensity in 2D space along the route of the microwave link, based on the input parameter of the interval length. This is followed by the creation and implementation of an algorithm for the distribution of rainfall intensity based on the crossing of microwave links.
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Efficiency map of synchronous machine
Gargulák, Jiří ; Marada, Tomáš (referee) ; Pruša, Radomír (advisor)
Subject of this bachelor thesis is application of interpolation on efficiency maps of synchronous servo-engines. Nearest neighbor interpolation, inverse distance weighting and bilinear interpolation is used. Another part of this thesis is measuring on drive of one axis on machine tool, which is made out of frequency convertor, synchronous engine and a ball screw. Also another subject of this thesis is research of power losses in synchronous engine, frequency convertor and ball screw.
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Influence of spatial snow distribution on flood course
Kučerová, Dana ; Jeníček, Michal (advisor) ; Langhammer, Jakub (referee)
For the purpose of hydrological forecasting on mountains' and sub-mountains' rivers is important knowledge of distribution of snow water equivalent in the watershed. Submitted thesis therefore deals with comparison of 9 interpolation methods in terms of quality of their forecasting when predicting snow depth and snow water equivalent in watershed Bystřice (127,6 km2 ), which is situated in the northwest of Bohemia in the Ore mountains. Point data of snow depth and snow water equivalent used in interpolation were sampled during an off- road measuring in 17. 2. 2010 at the 14 snow sampling locations. The interpolation methods were: (1) Thiessen's polygons, (2) inverse distance weighting, (3) global polynomial (4) local polynomial (5) radial basis functions, (6) ordinary kriging, (7) cokriging, (8) residual kriging and (9) orographic interpolation. Independent variable-altitude used in the calculation of snow depth and snow water equivalent was used only in the last three listed methods. Predictive ability of interpolation methods was evaluated by using cross-validation and visual comparison of predicted maps. The best prediction ability was provided by residual kriging and orographic interpolation. The geostatistical methods were next in the order. The method of Thiessen's polygons and inverse distance...
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Analysis of major precipitation events in Kopaninský stream catchment flow - a comparison with radar data ČHMÚ
ZAVŘEL, Bohuslav
Due to more frequent occurrence of extreme precipitation and consequent floods, demands for more accurate input data for modelling of rainfall-runoff processes are growing up. These models provide an approximate picture of the future state of the watercourse and the basin. The aim of this bachelor thesis is to do an analysis of selected precipitation events in the in the Kopaninský stream research basin for more accurate information on rainfall-runoff processes. The aim of the analysis of individual precipitation events is to evaluate differences in total precipitation and volume measurements recorded in the basin and radar estimated precipitation. The output is detailed data series of spatial and temporal distribution of major precipitation events in the GIS used as input to hydrologic models. The issues of atmospheric precipitation, precipitation interpolation methods and meteorological radars are discussed in the literature review, which explains selected basic concepts and principles of these topics.
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