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Wavelet Transform in Image Processing
Dostál, Martin ; Klíma, Ondřej (referee) ; Bařina, David (advisor)
The wavelet transform has been used for several decades and it is still an object of research - especially its recent modifications which are using the so-called second generation wavelets. It has several advantages over other integral transformations. The most important of them are the ability to localize both in time and frequency and an ability to decorrelate some real non-stationary signals such as images. For this reasons, the wavelet transform became an often used tool in many image processing tasks, for example in image compression, edge detection or contrast enhancement. In this thesis, the wavelet transform is explained, including the theoretical foundation and implementation for use with two-dimensional discrete signals. Some of the applications of the wavelet transform are presented and described. The wavelet transform showed to be suitable tool for edge detection, noise reduction, contrast enhancement and HDR compression.
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Diagnosis of mechanical vibrations in asynchronous motor origin
Dostál, Martin ; Dostál, Lukáš (referee) ; Janda, Marcel (advisor)
Every machine needs to be maintained and controlled, if may work reliably during they service life. Big part of service life of expensive machines are those machines in operation. Vibration diagnostics is type of analysis, that doesn’t need removal of rotation machinery. The vibration, that are created by running machinery, are used as source of information about mode of operation. This master’s thesis contains theoretical analysis of vibration diagnostics and vibration measurements of a particular machine. This thesis contains 3D models of bearings and rotor asynchronous machine, which are created by software Autodesk Inventor 2014. Bearings vibration analysis of this models is performed by software Ansys Workbench.
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Multi-stage compressors
Dostál, Martin ; Mauder, Tomáš (referee) ; Klimeš, Lubomír (advisor)
This work deals with compressors and their use in practice. It also describes the basic relationships for thermodynamic analysis of multistage compression, which is more energy efficient at high compression ratios. The work also includes an application for thermodynamic analysis of multistage compressors.
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Premature mortality in selected developed countries: causes and trends
Dostál, Martin ; Burcin, Boris (advisor) ; Hulíková Tesárková, Klára (referee)
Premature mortality in selected developed countries: causes and trends Abstract The main goal of the thesis is to describe the overall development of premature mortality and evaluate the development of mortality according to selected groups of causes of death and age groups in selected developed countries of Europe between the years 1999 and 2018. The selected countries for work purposes include the Czechia, Hungary, Sweden, Italy and France. The limit of premature mortality is the age of 70 years. The methods used in this thesis are direct standardization and bivariate decomposition. The results of the analysis showed an improvement in mortality rates in all selected states during almost the entire monitored period. This is proven, for example, by the improvement of the temporary life expectancy between the exact ages of 0 and 70 years. The positive development of premature mortality was mainly contributed by an improvement in mortality from diseases of the circulatory system in older age groups and an improvement in mortality from neoplasms. Key words: premature mortality, causes of death, decomposition, developed countries, Europe
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Multi-stage compressors
Dostál, Martin ; Mauder, Tomáš (referee) ; Klimeš, Lubomír (advisor)
This work deals with compressors and their use in practice. It also describes the basic relationships for thermodynamic analysis of multistage compression, which is more energy efficient at high compression ratios. The work also includes an application for thermodynamic analysis of multistage compressors.
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Manufacturing of ignition cover pad
Dostál, Martin ; Peterková, Eva (referee) ; Podaný, Kamil (advisor)
The thesis solves the design of the technology of production of the ignition cover pad made of steel 11 321 with a thickness of 1 mm with zinc surface treatment. It serves as part of the motorcycle engine sealing system. The part is rotating in shape with a diameter of 35 mm and consists of a central extrusion and a hole. The size of the series is 25,000 pieces per year. Production by a progressive compound tool from a coil with dimensions of 1200 x 500 mm is chosen. 3 forming operations with eating between steps are selected, which are implemented by cutting and embossing technologies. The necessary forming work of 476 kJ and the force of 267 kN are determined, according to which the PRESSIX CNV4 eccentric press is chosen. The machine is introduced into the automated Shungdar SJD and SJK production line, which consists of a straightener, unwinder and feeder.
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Case study of the Physiotherapeutic Treatment of a Patient Diagnosed with Nervus Peroneus Paresis
Dostál, Martin ; Kučerová, Ilona (advisor) ; Křížková, Štěpánka (referee)
Title: Case study of the Physiotherapeutic Treatment of a Patient Diagnosed with Nervus Peroneus Paresis. Aims: Gaining theoretical and practical knowledge about peripheral paresis, especially peripheral paresis of the nervus peroneus nerve. Subsequent elaboration of case study of a patient with a continuous professional practice and determination of the results of theraphy. Methodology: In the general part, the work focuses on theoretical knowledge about the anatomy of the peripheral nervous system, the clinical image of peripheral paresis and physiotherapeutic methods in the treatment of peripheral paresis.The special part of the work focuses on the case study of a patient diagnosed with paresis of the peroneus nerve and use of physiotherapeuticmethods in practice. Results: The patient, who had zero to one muscular strenght of the paretic muscules, improved to muscule strenght nuber two according to Janda, after the end of the therapy. The joint clearance around the foot, ankle joint and lower leg was restored. Elimination of most reflex changes in soft tissues and stretching of shortened muscules. Conclusion: Thanks to the cooperation of the patient and practiced physiotherapeutic methods, it was possible to increase the muscular strenght of the lower leg muscules. Physiotherapy is an integral...
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Invalidity of acts in employment
Dostál, Martin ; Tröster, Petr (advisor) ; Hůrka, Petr (referee)
Závěr Neplatnost právních úkonů v individuálním pracovním právu se v poslední době dramaticky vyvíjela. Nález Ústavního soudu1 změnil vzájemný vztah zákoníku práce a občanského zákoníku a preferencí relativní neplatnosti právních úkonů v pracovním právu prohloubil v zákoníku práce principy a zásady, na nichž je postaveno soukromé právo. Podle mého soudu je to velkým přínosem, jedním z principů soukromého práva má být rozhodnutí každého účastníka soukromoprávního vztahu, zda bude o svá práva bojovat. Nepochybně je však nutné udržet míru právní jistoty na vysoké úrovni. Pro účastníky pracovněprávních vztahů je dle mého názoru z hlediska právní jistoty výhodnější, považuje-li se právní úkon za platný, i když je tento stižen vadou, jež způsobuje jeho neplatnost, do té doby, než se jeden z účastníků jeho neplatnosti nedovolá. Jestliže se jedná o zásadní vadu, je zde zachována absolutní neplatnost právního úkonu, jak jsem uvedl výše. Upřednostněním relativní neplatnosti právních úkonů se zohledňuje snaha předcházet faktickým úkonům, uměle je nevytvářet, jak uvedl ve svém nálezu Ústavní soud, s jehož názorem na tuto problematiku se ztotožňuji. Z výše popsaných příkladů neplatnosti některých právních úkonů vyskytujících se v individuálním pracovním právu se nabízí také myšlenka zneužití prokazování domnělé...
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Design of linear axis for heavy machine tool
Dostál, Martin ; Marek, Jiří (referee) ; Hermanský, Dominik (advisor)
This diploma thesis is concerned with providing a construction proposal of a linear axis X for multifunctional machining center. Moreover, this work presents characterisations of machining centers, overview of manufacturers, list of main construction components used in the linear axis, their evaluation, assessment of various options for construction, which are then explained further. These detailed construction methods include calculations with the subsequent choice of feed system component. Ultimately, final evaluation of chosen option is provided as well. Another section of this thesis is also an economical assessment and 3D model alongside with mechanical drawing.
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Chess Program with Various Chess Variations with New Figure
Dostál, Martin ; Křena, Bohuslav (referee) ; Rozman, Jaroslav (advisor)
This thesis deals with an analysis and evaluation of methods and algorithms needed for successfull implementation of a chess program. Both the basic principles and further currently used extensions of these methods and algorithms are stated with a goal to implement a quality chess program playing different chess variations including a new figure. This thesis also introduces the basic pillars of every chess program - these pillars include board representation, state space search, evaluation of a game state and changes required for implementation of new chess variations. A comparison of difficulties of individual methods is included for an overview.
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