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Výpočtový model tlumiče odpružení / Computational Model of Shock AbsorberSvršek, David January 2019 (has links)
The diploma thesis titled, Computational model of shock absorber, is concerned with ways to simulate individual actuators of dampening with the goal of obtaining F-v characteristics dependent on the setup of the shock absorber. The work is divided into two halves, the first one being a review of literature and the second half being practical. The review part is focused on ways of shock absorber constructions and the physical principles involved with the present forces. The practical part of the work contains a computational model of a monotube shock absorber in the Matlab programming software.
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Měřicí funkce spektrálního analyzátoru N1996A-503 / Funktions of Spectrum Analyser N1996A-503Šoukal, David January 2009 (has links)
The theme of this diploma work is to introduce spectrum analzyer Agilent CSA N1996A to readers. In the work there are explained in detail all measuring functions of this machine, there are also mentioned all engineering characteristics and described all operating elements of this machine. In the diploma work is also mentioned the basice division of spectrum analyzers and their principles of activity. In the pracical part there are proposed the measurement assignments for hearers of subject MEMT, where is the possibility to use already mentioned spectrum analyzer. Including of the assignments there are also theoretical analysis of each assignment, their diagrams of wiring, practical metering and interpretation of results.
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Vyhodnocení vlastností vzdušných iontů vytvářených různými zdroji iontů / Air ionts measurementLazorka, Martin January 2013 (has links)
The work is focused on the composition of the atmosphere, the processes that take place in it, especially on the formation of atmospheric ions and the energy that must be supplied to ionize the gas. The work examines the influence of aerosol particles on the concentration of ions and also how air ions influence the human health. Last but not least, there is mentioned a comparison of the possibilities of artificial air ionization for interiors.
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Modelování vysokofrekvenčních pulsací / High-Frequency Pulsations ModelingStřecha, Ludvík January 2008 (has links)
The diploma thesis deals with the mathematical modeling of high-frequency pressure pulsations in water turbines. Pulsations are caused by the interaction between stator a rotor blades. These high-frequency pressure pulsations then cause high cycle fatigue of the head cover, spiral casing, runner and distributor. The mathematical model is solved by transfer matrix method. Data are processed in F-A char and MS Excel programs. Final results are demonstrated by frequency amplitude characteristics and by pressure mode shapes, where comparison of the mathematical model with the measurement is shown.
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Řešení úloh dynamiky těles pomocí matematických softwarů / Application of numerical procedures for solution of dynamics problemsPučegl, Pavel January 2010 (has links)
Discussion of the application of mathematical softwares for the determination of frequency characteristics of mechanical systems
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Teoreticko-experimentální stanovení měrné energie vířivého čerpadla / Theoretical and experimental setting of the side channel pump specific energyDančák, Zdeněk January 2011 (has links)
This master’s thesis deals with side channel pumps. Derivated formula of specific energy is supplemented by other equations and the results of CFD simulation. Further are analysed the mechanism of energy transfer from the impeller and external characteristics of the pump.
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Hydraulický návrh difuzoru čerpadla pro dva provozní body. / The design of hydraulic diffuser for the pump for two operational points.Dobšáková, Lenka January 2012 (has links)
The pump is suggested for optimum operation point wherein usually works. If the machine works in the areas of flows except for design point, it will cause decrease in its efficiency or genesis of pulsation. The compromise solution is possible to use the pump in a large range of flows together with high efficiency. The solution is diffuser with double curvature of vanes.
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Experimentální výzkum pískování v kontaktu kola a kolejnice / An Experimental Research of Sanding in Wheel/Rail ContactMachatka, Martin January 2014 (has links)
Presented master's thesis is focused on the experimental research of the sanding parameters in order to improve adhesion in the contact between wheel and rail. Sanding is the application of the sanding material directly in the wheel/rail contact. It is still common, most effective and traditional way how to deal with low adhesion problem, which is mainly caused by environmental contaminants. Research is important for the better understanding of the sanding process and also provides data, which are necessary for it's optimization and efficiency improvement. Newly developed twin-disc machine was used to carry out the presented experimental research. The influence of common contaminants on the adhesion is investigated, considering various operating parameters. Different amount of the applied sand is used to increase adhesion in the contaminated contact at various slip and rolling speed. Results show, that there is the amount of the sand, from which no significant adhesion increase occur. Obtained findings and the results presented in this thesis will be used to optimize sanding system, which will contribute to reduce cost associated with sanding and low adhesion.
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Clinical characteristics of Major Depressive Disorder run in families – A community study of 933 mothers and their childrenSchreier, Andrea, Höfler, Michael, Wittchen, Hans-Ulrich, Lieb, Roselind January 2006 (has links)
The familial aggregation of Major Depressive Disorder (MDD) has been repeatedly demonstrated. Several studies have investigated associations between various clinical characteristics of MDD in probands and overall rates of MDD in relatives. Few studies, however, have considered the familial aggregation of clinical characteristics of MDD. The aim of the present report is to examine mother–offspring associations of a variety of clinical characteristics of MDD in a general population sample. Data were derived from baseline and 4-year-follow-up data of 933 adolescents and their biological mothers of the Early Developmental Stages of Psychopathology (EDSP) study, a prospective-longitudinal community study. MDD and its characteristics were assessed with the Munich-Composite International Diagnostic Interview. We found that children of mothers who had a lifetime history of severe MDD and high number of symptoms, high impairment and/or melancholia, revealed elevated odds of MDD regarding the same characteristics as their mothers (ORs between 5.2 and 13.9). The observed associations did not differ by the children’s sex. DSM-IV melancholia and severity as well as impairment were found to aggregate within families. This finding can be interpreted as a validation of the DSM-IV MDD severity subtypes as well as of the melancholic specifier. Severe and melancholic MDD reveal a considerable high degree of familiar aggregation making the search for mechanisms involved in the familiar transmission of these forms of MDD particularly promising.
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Abreviace v současné bulharštině ve srovnání s češtinou / Abrreviation in Contemporary Bulgarian language in Comparison with the Czech languageKalajdžievová, Natalie January 2013 (has links)
ABBREVIATION IN CONTEMPORARY BULGARIAN LANGUAGE IN COMPARISON WITH THE CZECH LANGUAGE Dissertation work is aimed at confrontation study of abbreviation in Bulgarian in comparison with Czech and at the description of abbreviations as specific language symbols. Contemporary language tendencies and the changes in the field of abbreviation in relation to the language typology are taken into account. The work is dedicated to the grammatical, stylistic and semantic characteristics of the abbreviations, while a substantial part of the confrontation description addresses the graphical and initial abbreviations, which create a central part of the partial system of abbreviation formations. From the confrontational aspect, there is also described the ability of abbreviations to serve as word-formation base for derivatives. The dissertation work also includes the results of socio-linguistic research made by questionnaire method, where the respondents evaluated the abbreviations of an international character and the words containing abbreviated bases implemented into the text written in Cyrillic.
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