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Estimation and analysis of speech signal periodicity
Malucha, Jan ; Poměnková, Jitka (referee) ; Sigmund, Milan (advisor)
Theoretical part starts with a short introduction to speech signals and short time analysis method. Concept of periodicity is clarified. This is followed by analysis of the speech signal parameters - voiced/unvoiced classification, intonation and short time period similarity. Next the overview of methods used to analyze the mentioned parameters together with concepts of their algorithms is provided. These methods include ZCR, STE, HNR, ACF, NCC, AMDF and DTW. Algorithms using the methods with supporting preprocessing algorithms were programmed in MATLAB for practical part. All were tested on real speech signals and the results are discussed at the end of the thesis.
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Speech signal processing in time domain
Marko, Ján ; Staněk, Miroslav (referee) ; Sigmund, Milan (advisor)
The bachelor´s project deals with the processing of speech signals. The work includes a search of available publications on the issue of determining the voiced segments of speech and fundamental frequency. Attention is devoted to methods for speech recognition features in the time domain. Comparing theoretical and practical results on the real speech signals evaluates the use of methods, highlighting their advantages and disadvantages.
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Photonic crystal fibers
Dočkal, Martin ; Tejkal, Vladimír (referee) ; Šporik, Jan (advisor)
This graduation thesis deals with use of unconventional optical fiber with the intention of photonic crystal fiber. There are described types of photonic crystal fiber, their physical, optical and transfer characteristics. There is explained what are the photonic crystals, principle of their function and possible types of crystals. There are also detailed types of photonic fiber commonly used in the optical fiber branch. There is also explained photonic crystal fiber its structure a hierarchy of its types. In this thesis are described and demonstrated different kinds of photonic optical fiber and their use. There is demonstrated principle of one-dimensional periodical structure of Bragg fiber using simulation software. There can be seen graphical comparison of the simulated optical fiber core to commonly obtainable fiber. Outcome of this graduation thesis should be explanation of function of photonic crystal fiber and possibility of finding new type of fiber with optimal dispersion characteristics for use in fiber optics.
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Generic Flow Analysis in Computer Networks
Jančová, Markéta ; Holkovič, Martin (referee) ; Kolář, Dušan (advisor)
Tato práce se zabývá problematikou popisu síťového provozu pomocí automaticky vytvořeného modelu komunikace. Hlavním zaměřením jsou komunikace v řídicích systémech , které využívají speciální protokoly, jako je například IEC 60870-5-104 . V této práci představujeme metodu charakteristiky síťového provozu z pohledu obsahu komunikace i chování v čase. Tato metoda k popisu využívá deterministické konečné automaty , prefixové stromy a analýzu opakovatelnosti. Ve druhé části této diplomové práce se zaměřujeme na implementaci programu, který je schopný na základě takového modelu komunikace verifikovat síťový provoz v reálném čase.
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Jsou osobnostní rysy hraboše polního provázány s denním rytmem pohybové aktivity?
KUBÍKOVÁ, Pavlína
In this study, the relationship between personality traits and daily activity of Common voles (Microtus arvalis) was investigated. Thirty four voles were captured for tests from the wild and kept separately under stable light (L:D, 12:12) and ambient temperature (19 ? 1 oC) laboratory conditions. Voles were subjected to Open Field (OF) tests to determine their personality traits on locomotor activity and shy-bold gradients. They were then monitored in the PhenoTyper boxes, where their activity was recorded for seven days. In this thesis, it was found that more locomotor active and bold individuals in the OF test are also more active in the PhenoTyper box, are more prone to periodicity and regular ultradian rhythms, and have more activity in the dark. Shy individuals are often immobile (most often in the dark), which weakens the periodicity of their ultradian rhythms. Thus, greater boldness in the common vole leads to greater nocturnal activity, and shyness rather to greater nocturnal immobility. The personality traits were associated with daily activity, periodicity, and ultradian rhythms.
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Continued fractions with prescribed period
Kuděj, Martin ; Kala, Vítězslav (advisor) ; Francírek, Pavel (referee)
This thesis concerns continued fractions of quadratic irrationals. Their basic properties are shown, including mentioning necessary theory to do this. Then, this theory is used to find the form of continued fractions of square roots of positive nonsquare integers and their symmetric part (a1, . . . , ak). Next, for a given symmetric sequence of positive integers (a1, . . . , ak), we find all natural numbers N, whose square root has a continued fraction with symmetric part (a1, . . . , ak). These positive N will be described as values of a certain quadratic polynomial, whose properties are studied as well in the thesis. 1
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Generic Flow Analysis in Computer Networks
Jančová, Markéta ; Holkovič, Martin (referee) ; Kolář, Dušan (advisor)
Tato práce se zabývá problematikou popisu síťového provozu pomocí automaticky vytvořeného modelu komunikace. Hlavním zaměřením jsou komunikace v řídicích systémech , které využívají speciální protokoly, jako je například IEC 60870-5-104 . V této práci představujeme metodu charakteristiky síťového provozu z pohledu obsahu komunikace i chování v čase. Tato metoda k popisu využívá deterministické konečné automaty , prefixové stromy a analýzu opakovatelnosti. Ve druhé části této diplomové práce se zaměřujeme na implementaci programu, který je schopný na základě takového modelu komunikace verifikovat síťový provoz v reálném čase.
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Estimation and analysis of speech signal periodicity
Malucha, Jan ; Poměnková, Jitka (referee) ; Sigmund, Milan (advisor)
Theoretical part starts with a short introduction to speech signals and short time analysis method. Concept of periodicity is clarified. This is followed by analysis of the speech signal parameters - voiced/unvoiced classification, intonation and short time period similarity. Next the overview of methods used to analyze the mentioned parameters together with concepts of their algorithms is provided. These methods include ZCR, STE, HNR, ACF, NCC, AMDF and DTW. Algorithms using the methods with supporting preprocessing algorithms were programmed in MATLAB for practical part. All were tested on real speech signals and the results are discussed at the end of the thesis.
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Transcription factors driving periodic gene expression during the fission yeast cell cycle
Jordáková, Anna ; Převorovský, Martin (advisor) ; Paleček, Jan (referee)
The fission yeast Schizosaccharomyces pombe plays an important role in elucidation of the mechanisms of cell cycle regulation and characterization of the relevant effector molecules involved. The cell cycle of S. pombe consists of a prolonged period of growth (G2 phase), which is followed by a nuclear division (M phase), a very short G1 phase and DNA replication (S phase). Already during S phase formation of division septum occurs. Cell cycle progression is regulated at multiple levels. Although the yeast S. pombe is an extensively studied model organism, knowledge of the transcriptional network regulating progression through the cell cycle is still incomplete. Transcription factors are very important regulators of gene expression and therefore their characterization is the subject of research. At the transcriptional level, several key transcription factors have been identified that regulate periodically oscillating and interdependent waves of gene expression during the cell cycle. This study summarizes the current state of knowledge in the field of the transcriptional regulation of periodic gene expression in the fission yeast cell cycle.
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Comparison of population parameters of Large blues from genus Phengaris on multiannual basis
Bártů, Nikola ; Vrabec, Vladimír (advisor) ; Petr, Petr (referee)
There where evaluated the changes in abundance of overall metapopulations and abundace of butterflies on surveyed areas occupied by Phengaris nausithous (Lepidoptera: Lycaenidae). It ran on two long-term monitored locations in the Czech Republic : Slavíkovy ostrovy u Přelouče a Dolní Labe u Děčína. Data for this comparison was obtained by longterm monitoring of the abundance of butterflies on these locations. The method of reverse capture of labeled specimens was used and then statisticall processing of marking results in program MARK. In final number of the target species has been found significant fluctuation , after our evaluation. Abudance of total metapopulation in Přelouč in years from 2004 till 2016is variable from 148 up to 1 369 butterflies, numbers in Děčín between 2008 and 2016 has vacillated from 273 to 1952 individuals. Growth of abudance of metapopulation on these two locations are obvious from crossing both diagrams (in years 2006, 2010-11 and 2014-2015). However, observing time-lime is not so long, this is very strong argument to support this hypothesis: ,,From aged time sequence there is noticable graduation periodicity. Than has been compared progression of population of individual locations compare to metapopulation of both locations together and it has discovered this observation is a real picture of aged progress. Most of places of research copying trend of metapopulation. If there are any differences, for example total metapopulation grows, but population of individual location declines, it could be explain as a change of familiar location related on mamagement, in this case on the wrong one. Contrariwise, rising of individual colony against the trend of metapopulation, mostly shows a positive changes in maintenance of site. Long therm researching is highly recommented for rating of impact of management.
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