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Modern denitrification methods of coal fired boilers
Nárovec, Jiří ; Houdek, Ing Milan (referee) ; Skála, Zdeněk (advisor)
V současnosti musí velké energetické podniky k dodržení emisních předpisů, zejména pak vyžadovaných limitů NOx, uplatňovat denitrifikační metody. Tématem předkládané diplomové práce jsou moderních denitrifikační metody a jejich praktické uplatnění v lokálních poměrech uhelného kotle s parním výkonem 640 t.h-1 v elektrárně Počerady. Práce obsahuje rešerši moderních denitrifikačních metod používaných velkými uhelnými kotli se zaměřením zejména na sekundární denitrifikační metody. Jsou uvažovány dvě možné varianty denitrifikace – varianta 1 využívá selektivní katalytickou redukci (SCR) a varianta 2 selektivní nekatalytickou redukci (SNCR) společně s nízkoemisními hořáky a stupňovaným přívodem spalovacího vzduchu. Pro výběr vhodné denitrifikační metody jsou studovány investiční náklady jednotlivých variant – nižší investiční náklady (o 19.4%) slibuje varianta 2. Při srovnávání SCR se SNCR vyšlo najevo, že investiční náklady metody SNCR jsou 5krát nižší než metody SCR. V souladu s investičními náklady, s dispozicí kotle a se složitostí jeho instalace je pro navazující studium problematiky využita varianta 2. Stěžejní část práce se zabývá stanovením optimálního tzv. teplotního okna pro konkrétní metodu SNCR. Těžištěm práce je tepelný výpočet ohniště a části deskového přehříváku pro stanovený rozsah paliv a výkon kotle v rozmezí 60-100%. S uvažováním výsledků z výpočtu jsou navrženy dvě vstřikovací roviny, které mají zaručit vysokou efektivitu denitrifikačního procesu při uvažovaných provozních podmínkách kotle. Diplomová práce rovněž diskutuje obecnou vhodnost instalace SNCR a SCR ve stávajících uhelných kotlích.
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The design of components for emergency cooling of reactor pressure vessel
Katzer, Milan ; Šen, Hugo (referee) ; Martinec, Jiří (advisor)
My thesis deals with the design of an experimental emergency cooling device of the reactor pressure vessel (RPV). It consists of two parts, the theoretical one and practical one. Different molten corium cooling methods in terms of their efficiency and comparison are introduced in the theoretical part. The design of an experimental emergency cooling device, which incorporates a model channel past the reactor pressure vessel , is presented in the practical part. The cooling device consists of a model channel past the reactor pressure vessel, condensator, which takes away the heat generated by the reactor pressure vessel and the pump of a secondary loop. Next, thermal and hydraulic calculations are given in this section. The conclusion is devoted to the evaluation of particular cooling technologies and their comparison in terms of nuclear and technical safety.
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Repairs of lattice parts of ion filtres at NPP
Kloboučník, Martin ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
The thesis focuses on repair preparation of Ion Filters at nuclear power plants cleaning units. The thesis shortly describes cleaning units of primary and secondary circuit where Ion Filters and Ion Catchers are implemented. The thesis introduces summary of convenient method for welding of thin filtration plates from austenitic materials to collecting pipe including convenient technology for fabrication of narrow loop holes in filtration plates. The aim of thesis is to propose convenient execution of repair and manufacturing of spare parts after different kind of damage of filter internals. Part of the thesis is welded joints quality verification on the testing sample including result of provided test, its evaluation and Ion Filters repair economical evaluation as well.
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High-Performance Analytics (HPA)
Soukup, Petr ; Pour, Jan (advisor) ; Novotný, Ota (referee)
The aim of the thesis on the topic of High-Performance Analytics is to gain a structured overview of solutions of high performance methods for data analysis. The thesis introduction concerns with definitions of primary and secondary data analysis, and with the primary systems which are not appropriate for analytical data analysis. The usage of mobile devices, modern information technologies and other factors caused a rapid change of the character of data. The major part of this thesis is devoted particularly to the historical turn in the new approaches towards analytical data analysis, which was caused by Big Data, a very frequent term these days. Towards the end of the thesis there are discussed the system sources which greatly participate in the new approaches to the analytical data analysis as well as in the technological solutions of High Performance Analytics themselves. The second, practical part of the thesis is aimed at a comparison of the performance in conventional methods for data analysis and in one of the high performance methods of High Performance Analytics (more precisely, with In-Memory Analytics). Comparison of individual solutions is performed in identical environment of High Performance Analytics server. The methods are applied to a certain sample whose volume is increased after every round of executed measurement. The conclusion evaluates the tests results and discusses the possibility of usage of the individual High Performance Analytics methods.
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Phylogeography of Pipistrellus pipistrellus species complex
Chudárková, Adéla ; Hulva, Pavel (advisor) ; Janko, Karel (referee)
(in English) Pipistrellus pipistrellus species complex contains two sympatric species inhabiting Europe and part of West and Central Asia (Pipistrellus pipistrellus s. str, Pipistrellus pygmaeus s. str) and several other lines, isolated in the Mediterranean (North Africa, islands and peninsulas of the Mediterranean Sea). This taxon is a part of the extensive radiation within the genus Pipistrellus, which in today's concept includes about 30 species. Mosaic line of P. pipistrellus complex, located at different stages of diversification and secondary contacts in the Mediterranean biodiversity hotspot, is a suitable model for research on speciation. In this thesis we focused on analyses of distribution, phylogeography, population structure and demography based on mitochondrial data from 323 individuals, representing almost the entire range. Control region of mitochondrial DNA was chosen as a genetic marker. Variability in the 378 pb long fragment acknowledged the existence of several genetically distinct lines whose species status is discussed. Observed fylogeografic pattern confirms the existence of groups of radiation centers in the Mediterranean region. An allopatric speciation was there, two of the lines (P. pipistrellus s. str and P. pygmaeus s. str.) later expanded into Europe and their ranges...
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Mapping of the dresses market for an e-shop
Donátová, Martina ; Vávra, Oldřich (advisor) ; Průšová, Petra (referee)
The Master's thesis "Mapping of the dresses market for an e-shop" should work as a basis for a future business, an e-shop with dresses, providing a customized product -- dresses, which the customer can design himself using the online configurator. The goal of the thesis is to map the market environment, competition and to determine the consumer behaviour and his desires when shopping online. Theoretical part consists of entrepreneur theory, marketing mix, e-commerce and market research. Practical part will introduce the e-shop and the whole market research including both secondary and primary one. The result of the thesis should be a recommendation for the e-shop realization.
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Passive rehabilitation affecting on spasticity of multiplex sclerosis
Prášil, Jakub ; Bunc, Václav (advisor) ; Foubíková, Bohdana (referee)
Title: The influence of a passive rehabilitation on spasticity in multiple sclerosis Objectives: The main objective is to summarize the current knowledge about multiple sclerosis and the possibilities of influencing the spasticity as a serious symptom. Another objective is to verify the effectiveness of the antispastic passive rehabilitation of the lower limbs of selected patient in practice. Methods: Verification of the effectiveness of the system of antispastic passive rehabilitation of the lower limbs was through a qualitative research. For the work design is used the type of qualitative experiment. The research sample is a person with spasticity in the lower limbs. In the first two parts of the work was used an analysis of scientific literature and a content analysis. The strategy of data obtaining is also in the form of observation, interviewing, measuring, scale and variety. A medical documentation, anamnesis, casuistry and a secondary analysis were used. Results: Individual use of each method resulted in the influence of spasticity only for a short time. Mobility was affected in the sense of passive movement the most after the soft techniques and massage therapy. The most striking results were achieved after the use of all methods when the spasticity was positively influenced in accordance...
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The influence of brand on consumer buying behavior
Aliapulios, Telis ; Vokáčová, Lucie (advisor) ; Ludmila, Ludmila (referee)
The diploma thesis concerns with influence of Apple brand on consumer buying behavior. The aim of thesis is to qualify the influence of brand on consumer buying behavior on smartphone market. From this conditions will arise the recommendations to Apple company, how is possible to bolster its position on mobile phone market. The theoretical part of thesis place emphasis on description of marketing mix, brand theory and consumer buying behavior. Practical part is based on studied secondary data. There is detailed description of Apple company its brand building strategy, situation on smartphone market with marketing instruments, that are used on this specific market. Quantitative questionnaire survey performed in electronical form creates a core of the practical part of the thesis and is preceded by qualitative pre-survey on seven iPhone users. Precisely 154 respondents participated on questionnaire survey that observed thoughts and judgements of questioned people about Apple brand. There are included opinions of owners, that own various smartphone brands and also respondents from the group of Apple iPhone users. The responses of both groups are in the chapter of appraisal results and conditions compared along with studied secondary data. These outcomes of questionnaire survey and secondary data are used as a framework to completion several recommendations for Apple brand and the whole company on this market. Almost three quarters of owners, that use all chosen smartphone brands, perceive the prices of Apple smartphones as overly high. Just as the first group evaluates the situation a bit more than half of the iPhone users, although inside this group is a lower sensitivity on Apple products price perception. One of the important recommendation for Apple company is to be more efficient in communication about the adjustment of its smartphone prices and pricing policy towards to consumers across the countries. It is necessary to obtain more consumers from a group of new Apple brand users and students. These expects the offer of cheaper smartphone in high quality medium category. In case of their satisfaction is there scope for Apple to offer them its premium smartphones in the top category.
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Economic analysis of selected village or town
Vítů, Jan ; Homolka, Jaroslav (advisor) ; Lucie, Lucie (referee)
This thesis is about economic analysis of the villiges Pelhrimov and Nova Cerekev, the main goal of this work is compare the economic situation of both villages. The first part concerns the theoretical background of the issue, ie. general problems of the autonomous unit and the structure of the budget, namely the procedures for drawing up the budget and the definition budget item. Second part is practical part, which analyzes economic of Pelhrimov and Nova Cerekev for each year over the period 2011-2015, while the analysis is carried out on the principle of annual capture changes in revenues and costs. Subsequently, both villages are compared to the comparable base, that base is recalculation on 1 inhabitant for accurate capture of development. The analysis is followed by questioning in both villages, which aims to find out how residents perceive the issue of management of the village where they live. Finally is summarizing the outcome of secondary and primary research than make an objective assessment of both villages and suggest a possible improvement in the framework of their activities to the future.
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Ekonomika organizovaného zločinu: Přímé zahraniční investice v Latinské Americe a Karibiku
Tošovský, Štěpán ; Klosová, Anna (advisor) ; Jackson, Ian (referee)
This paper attempts to investigate the degree to which organized crime affects FDI in 15 Latin America and Caribbean countries during 2006-2014 period. We employed four crime proxies: homicide rate, organized crime index, business cost of terrorism index and business cost of crime index and analyzed their impact on overall, sectoral and industrial FDI inflows. We find evidence of a deterrent effect of organized crime on FDI inflows; in particular on FDI in secondary and tertiary sectors. On the contrary FDI inflows in more extractive industries - primary sector - are less affected by the presence of organized crime
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