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Multimedia support of the course BSIS
Pasečný, Jan ; Šebesta, Vladimír (referee) ; Sigmund, Milan (advisor)
This paper takes aim at creating a consistent form of study materials, supplemented with illustrative examples, for Signals and systems subject. The thesis starts with basic characteristics of acoustic, image, biological and communication signals. Characteristics of linear signals and AD&DA conversion has been added to the next part and to complete the submission, discrete signals follow. Diploma thesis as a whole contains basic theoretical description of problematics, which it tries to supplement with interesting examples, connections, graphs and matlab scripts for illustrative presentation of mentioned problematics.
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Application of kriging in engineering problems with uncertainties
Tvrzník, Jakub ; Lehký, David (referee) ; Vořechovský, Miroslav (advisor)
The presented bachelor thesis aims at interpolation method called kriging, which is based on regression of values measured in the surroundings. Kriging is based on the idea that interpolated function is one realization of a random field. Using this method we can quantify the estimates of functional values at the surrounding points, including estimation errors at each point. At the same tame, kriging respects the exact measured values and the interpolation passes through them. The practical part demonstrates the application of method to engineering tasks, where the measured values are distributed randomly. In other examples, the measured values are distributed by using a grid.
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Segmentations for time-variable systems and their implementation
Pavlíček, Tomáš ; Smékal, Zdeněk (referee) ; Balík, Miroslav (advisor)
This thesis is interested in describing stationary random discrete signals, especially) in music discrete signals. Here is described when is signal stationary and when is not stationary. It contains tip for preprocessing of signal for accurate recognition of local stationarity. Thesis contain mathematical definition of parameters of random digital signals, which are used for stationarity recognition. It is followed by description of basic windows, their categories, describing of their parameters and comparing of each. In next part of thesis are described mothods of segmentations with constant window constant overlap save, constant window constant ovelap add, variable window constant overlap save, variable window constant ovelap add and variable window variable overlap add. It is followed by analyzing of windows used in segmentations with variable lengths of segments. As next point of thesis are transients made by step changes of coefficients of filter in filtering of segments with variable lengths. At the end is investigated the best accurate method of signal stationarity detection. Segments made by accurate method of detection are analyzed. thesis contains exapmle of music signal segmentation.
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Time Series Prediction
Dvořáček, Tomáš ; Rozman, Jaroslav (referee) ; Hříbek, David (advisor)
The aim of this thesis is to design and implement a program that will be able to analyze and predict the future evolution of univariate and multivariate time series from a given input. Statistical approaches and approaches where time series are predicted using neural networks have been used in the solution.
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Vliv změny ceny ropy na ekonomiky
Peterka, Vít
Peterka, V. Oil price impact on economies. Bachelor`s thesis. Brno: Mendel Uni-versity in Brno, 2017. This paperwork is about the impact of oil price on compared economic indicators in chosen countries. Compares the evolution of economic indicator of chosen countries and verify dependence of these countries on oil price in period 2004 to 2015. It also tries to identify different political-economics solution attitudes to occurred situations. To analysis of data is used correlation analysis and trend removal method by HP filter. Using correlation analysis was defined a relation among oil price and economic indicators.
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Vliv vybraných faktorů na trh veřejných zakázek ČR
Hubáčková, Vendula
This diploma thesis deals with the public procurement market in the Czech Republic. Its aim is to identify whether selected financial factors and legislative changes have an influence on course of awarded and commenced public contracts. The comparison of individual wordings of Act no. 137/2006 Coll., as subsequently amended, and regression analysis of time series became the main used methods. There was ascertained an influence of thresholds for below-threshold public contracts and an influence of legislative changes on behaviour of contracting authorities. Main financial resources of Czech Republic public contracts were also identified as important factors of influence on volume of commenced public contracts. Results of this thesis lead to the conclusion, that economic situation of state and made political decisions could be important too.
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Application of kriging in engineering problems with uncertainties
Tvrzník, Jakub ; Lehký, David (referee) ; Vořechovský, Miroslav (advisor)
The presented bachelor thesis aims at interpolation method called kriging, which is based on regression of values measured in the surroundings. Kriging is based on the idea that interpolated function is one realization of a random field. Using this method we can quantify the estimates of functional values at the surrounding points, including estimation errors at each point. At the same tame, kriging respects the exact measured values and the interpolation passes through them. The practical part demonstrates the application of method to engineering tasks, where the measured values are distributed randomly. In other examples, the measured values are distributed by using a grid.
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Unit root testing with applications to financial time series
Pechmanová, Kateřina ; Zichová, Jitka (advisor) ; Hendrych, Radek (referee)
This work deals with linear ARMA processes, which are intended to describe the behavior of time series, and also with analysis of selected time series. First, the basic concepts are introduced together with the descriptions of the ARMA models. Further, the Dickey-Fuller test for a unit root, as an approach to the verification of nonstationary time series, is introduced. An important part is the practical application of these models and tests on simulated and real data. Real analyzed data capture developments in the exchange rate of Czech crown against Euro. All calculations were performed in the Mathematica software. Powered by TCPDF (www.tcpdf.org)
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Economic analysis of currency pair EUR/USD
Peťura, Michal ; Procházka, Petr (advisor) ; Václav, Václav (referee)
This thesis deals with the relationship of exchange rate theory regarding the currency pair EUR / USD. The theoretical part defines the fundamental issue of exchange rates, exchange-rate regimes and the foreign exchange market, where the exchange rates are made. The crucial part of the theory is devoted to economic theories causing currency movements. In conclusion of the theoretical part attention is also given to econometric methods and statistics time series analysis.
The analytical part of the thesis examines the short and long term relationships of purchasing power parity, the theory of parity of interest rates and monetary approach to the exchange rate for the currency pair EUR / USD. A regression analysis is used for investigating short-term relationships, and is applied to the relative changes in the value of the currency pair EUR / USD and the changes in the relative values of the theory of exchange rate determination. The long-term equilibrium relationship is analyzed by using a cointegration analysis, specifically the Engle-Granger and Johansen tests. The estimated results are evaluated and discussed in the final part of the thesis.
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Segmentations for time-variable systems and their implementation
Pavlíček, Tomáš ; Smékal, Zdeněk (referee) ; Balík, Miroslav (advisor)
This thesis is interested in describing stationary random discrete signals, especially) in music discrete signals. Here is described when is signal stationary and when is not stationary. It contains tip for preprocessing of signal for accurate recognition of local stationarity. Thesis contain mathematical definition of parameters of random digital signals, which are used for stationarity recognition. It is followed by description of basic windows, their categories, describing of their parameters and comparing of each. In next part of thesis are described mothods of segmentations with constant window constant overlap save, constant window constant ovelap add, variable window constant overlap save, variable window constant ovelap add and variable window variable overlap add. It is followed by analyzing of windows used in segmentations with variable lengths of segments. As next point of thesis are transients made by step changes of coefficients of filter in filtering of segments with variable lengths. At the end is investigated the best accurate method of signal stationarity detection. Segments made by accurate method of detection are analyzed. thesis contains exapmle of music signal segmentation.
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