|
Steel structure of a business centre
Kočí, Petr ; Pilgr, Milan (referee) ; Štrba, Michal (advisor)
The diploma thesis elaborates on the proposal of a loadbearing steel structure of a shopping centre. Four-storey building has total lenght of 88 m, width 48 m and its base structural grid is 8 x 8 m. The total height of building is 25,4 m. First three floors above ground are designed with structural height of 5,6 m whilst the 4TH floor uses height of 4,0 m. Frame structure is formed by primary beams and castellated secondary beams. Above 4TH floor, the roof structure is designed in two alternative versions, both using solid purlins and truss girder. The 3D computer animation of the building is also part of thesis. The shopping centre that is subject of the final thesis is located in Brno area.
|
|
Static solution of hospital completion in Pisek
Kukla, Radim ; Švaříčková, Ivana (referee) ; Zlámal, Martin (advisor)
In this diploma thesis „Static solution of hospital completion in Pisek“ I study statical solution of one new building of hospital. Statical solution includes the design and dimensioning of reinforced concrete floor structures and peripheral beams. The floor structure consists of point supported reinforced concrete slab. The floor slab is supported by columns and walls. The aim of the project is to desing and evaluate the ultimate limit state of reinforced concrete slab and beams. Also was created 3D computational model to analysis the construction, model was created in software Scia Engineer. To verify the resulting values of internal forces was used to the method of replacement frames. The thesis includes an analysis of internal forces in the structure, while based on different types of soil. Individual values are compared. Finally was made drawings of solved part of the building.
|
|
Turn - over positioning table
Mareček, Vojtěch ; Dokoupil, Vladimír (referee) ; Foller, Bronislav (advisor)
This diploma thesis deals with projection and general design of rotary indexing table for dedicated machine tools. The major attention is given to substitution of hydraulic drive table by table driven by servomotor, namely double axis its positions in vertical and horizontal directions. The total configuration of rotary table is solved as a construction kit, user can used any servomotor and additive gearbox. The work is concentrated to the optimization of table construction for this new designed conception. The positioning and fixing of table plate is solved by couple of Hirth couplings with central hydraulic motor. The computational part of work includes calculations of dynamic of rotary motion of the table and hydraulic system. All important screw connection, gear wheels and Hirth couplings were verified by calculations. Also working lifetime of bearings and strength deformation of major constructional sections of rotary table verification were controlled. Inherent part of work is security analysis, economics analysis, patent search and analysis of construction identity. Presented work contains three-dimensional model, drawing documentation of both variants of configurations and production drawing of major section parts of rotary table.
|
|
Spectral optical simulator
Kavalír, Zdeněk ; Pop, Tomáš (referee) ; Pelikán, Josef (advisor)
The aim of this thesis is to design and implement an optical simulator focused on spectral light sources and dispersion effects, suitable for educational and experimental purposes. The input of the simulation is an XML scene definition file describing light sources, optical elements and optical sheets. The result of the simulation is one or more pictures containing incident light footprints collected on optical sheets as well as side sheets observing scene from a distance along with track of light passing through the scene. A light source can be defined as a point light with user-defined spectral distribution or a bitmap light using input bitmap picture as a glowing texture. The shape of any optical element can be defined as a basic solid, or constructed using CSG techniques. The scene definition file specification allows using of arithmetic expressions and user-defined variables. The simulation is based on a distribution of light from light sources toward the scene using a Monte-Carlo algorithm. Behaviour of light incident onto a transparent boundary is computed precisely according to the geometry of an element; a paraxial ray approximation is not used.
|
|
Český příspěvek k řešení mezních stavů tenkostěnných konstrukčních systémů
Škaloud, Miroslav ; Zörnerová, Marie
Thin-walled construction as a powerful way to saving steel and the stability limitations involved are discussed. It is shown that this promising trend can be materialised just thanks to the beneficial effect of so-called post-buckled behaviour. As a great part of steel structures are subjected to repeated loading (bridges, crane-supporting girders and the like) it is demonstrated by the results of numerous experiments how the post-buckled reserve of strength is affected by the cumulative damage process generated by the many times repeated character of the loading.
|
|
ELECTRE methods: theory and applications
Pieter, Michal ; Jablonský, Josef (advisor) ; Fiala, Petr (referee)
Multiple-criteria decision-making (MCDM) is a field of decision theory concerned with analyzing discrete sets of variables evaluated by multiple criteria. Facilitating decisions in such situations are several methods, among them a family known as ELECTRE. Using threshold values and the concept of outranking, they allow for improved modeling of the uncertain nature of real systems. This thesis sets out to describe all of the basic ELECTRE methods, as well as several of their modifications and further extensions and aims to do so with a sufficient level of detail and using precise mathematical language. It also presents key applications of said methods and reviews their implementation in software. Lastly, it introduces a brand new software, ELIA, developed as a part of the thesis. It allows users to solve practical problems using four of the basic ELECTRE methods.
|
|
New Approaches in Numerical Aeroelasticity Applied in Aerodynamic Optimization of Elastic Wing
Navrátil, Jan ; Slavík, Svatomír (referee) ; Komárek,, Martin (referee) ; Hlinka, Jiří (advisor)
Aeroelasticita je nezbytná vědní disciplína zahrnuta do návrhu letounů. Zaměřuje se na předpovídání jevů, které vznikají vlivem interakce aerodynamických, elastických a setrvačných sil. Tyto jevy často vedou ke katastrofickým následkům, proto musí být prokázáno, že nevzniknou v rozsahu rychlostí ohraničujících letovou obálku. Aplikace moderních materiálů při konstrukci draku, spolu se snahou navrhnout aerodynamicky efektivní tvar křídel, vede ke zvyšování poddajnosti letounů. To má za následek změnu aerodynamických vlastností a také k výraznějšímu vliv na aeroelastické jevy, které mohou být vyvolány snadněji vlivem pohybů tuhého tělesa než v případě tužších konstrukcí. Aeroelastické jevy mohou vznikat v širokém rozsahu rychlostí zahrnujícím i transsonickou oblast. V této oblasti je ovlivněna zejména rychlost, při níž dochází k třepetání, a to vlivem nelineárních jevů v proudu. Běžné nástroje, které jsou založeny na lineárních teoriích, nejsou schopny tyto nelineární jevy popsat. Cílem práce je proto navrhnout, implementovat a otestovat nástroj pro výpočetní (numerickou) simulaci aeroelasticity. Nástroj má využívat řešič proudového pole, který je schopen předpovědět nelineární jevy. V práci je kladen důraz na simulaci statické aeroelasticity. V práci jsou popsány metody, které je nutno zahrnout do numerické simulace statické aeroelasticity. Dále je popsán vlastní nástroj a je provedeno zhodnocení konvergence statických aeroelastických výpočtů. Funkčnost nástroje byla ověřena na příkladech, kdy byly použity různé aerodynamické a strukturální modely. Nástroj byl také aplikován při aerodynamické tvarové optimalizaci poddajného křídla. Výsledky optimalizace a její výpočetní náročnost byly porovnány s případem optimalizace tuhého křídla. Na závěr je v práci prezentován příspěvek autora do výzkumu zaměřeného na zhodnocení vlivu časové synchronizace mezi CFD a CSM řešiči. Použitý testovací případ je transsonické obtékání křídla na začátku třepetání (flutteru). Výsledky byly srovnány s experimentálními daty poskytnutými NASA.
|
|
Modelling 3D Forest Structure for Improved Retrieval of Forest Biophysical Properties
Janoutová, Růžena ; Albrechtová,, Jana (referee) ; Štarha, Pavel (referee) ; Martišek, Dalibor (advisor)
Hlavním cílem práce bylo zlepšení kvantitativních odhadů vegetačních parametrů smrkových porostů pomocí spektrálních simulací trojrozměrného modelu přenosu záření. Prvně bylo potřeba vytvořit přesný 3D model smrku. Implementace přesného 3D modelu smrku pro parametrizaci celých lesních porostů je v současné době výpočetně nemožné, bylo tedy nutné tento 3D model smrku zjednodušit. Přesný 3D model smrku společně s dostupnými leteckými daty sloužil pro nalezení optimálního zjednodušení. Optimální model vedl ke kompromisu mezi výpočetní náročností a přesností výsledné odrazivosti z modelu přenosu záření. Následně byl optimální model smrku využit pro odhady vegetačních parametrů ze satelitních snímků. Přesnost odhadů byla ověřena oproti pozemním měřením odhadovaných parametrů. Na závěr byly porovnány výsledky z odhadů vegetačních parametrů pomocí optimálního 3D modelu smrku s výsledky z tradičního přístupu pomocí modelů stromu s geometricky jednodušími tvary korun.
|
|
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.
|
|
Mouse Gestures
Dzurenko, Miroslav ; Karásek, Michal (referee) ; Bílý, Tomáš (advisor)
Computer mouse was invented more than forty years ago, but its real potential is not even used at present. Application Just Gestures extends mouse possibility with "mouse gestures" - gestures which are created in combination with mouse clicks and movements. This trajectory is recognized and executes specific command for any application or operating system, what makes work easier and faster. The aim of this work is to create an application for Microsoft Windows system based on neural network recognition. In regards to our specification, it is necessary to divide problem in to three basic parts - retrieving and processing mouse actions, learning, recognition of gestures and executing the adequate command.
|
guest ::
