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LNA for the APT signals receiver
Žúrek, Dan ; Urbanec, Tomáš (referee) ; Baran, Ondřej (advisor)
This bachelor thesis is dealing with design, realization and optimization of the LNA (Lownoise amplifier) for receiving of APT signals from the NOAA weather satellites in 137 MHz – 138 MHz frequency band. The first part of this work is aimed on critical parameters of the amplifier and the filter circuits especially on a noise figure and a high selectivity. The next part of this project is about the particular concept and simulation of LNA by using the Ansoft Designer software. The printed circuit board is realized in the Cadsoft Eagle. The final part of this bachelor thesis is dealing with a production of such amplifier together with its measurement and testing in a real operation of receiving APT signals.
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Suffix Trees Construction and Their Use in Bioinformatics
Hlaváček, Pavel ; Čermák, Martin (referee) ; Martínek, Tomáš (advisor)
This work discusses problems of suffix trees implementation and their use in bioinformatics. There are given different sorts of algorithms for building suffix trees in this work. In the first place, it deals with the on-line method implementation for building suffix trees, proposed by E. Ukkonen and approximate string matching. That is made by application of dynamic programming principles, adapted for using suffix trees. Both of these methods are described by pseudocode and implemented in a work supplement.
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Similar Photo Searching
Rosa, Štěpán ; Mlích, Jozef (referee) ; Beran, Vítězslav (advisor)
This paper describes the way to realization such an application, where a user chooses a photo database to working with and enters a photo into the system. The system using a visual vocabulary finds the most similar photos from the database and offers tags of the searched photo with a suitable form based on the tag statistical analysis of this photo.
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Replacement of big diametral bearing at mounting of vertically lathe table
Sklenář, Jaroslav ; Skýpala, Milan (referee) ; Marek, Jiří (advisor)
This dissertation deals with table seating at a vertical lathe made by TOSHULIN, a.s. The target is to design such table seating which would replace the existing seating solution with a cross bearing having better technical and economical parameters. The dissertation includes analysis of some chosen variants of table seating; this analysis has been done from several aspects and it is completed by the subsequent evaluation. After the results of multi criterion analysis have been evaluated, I performed calculation as well as designing of two table seating variants in the practical dissertation part.
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Searching for Similar 3D Models
Sálus, Ondřej ; Beran, Vítězslav (referee) ; Španěl, Michal (advisor)
Goal of this paper is development of aplication for comparing of 3D models. It deals with extraction od descriptors suitable for comparing of 3D models and enables to find models similar to users query. For extraction of descriptors application uses Reeb graph method. This paper also describes usage of libraries that implements Reeb graph method and some experiments with speed and quality over pre prepared models database.
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Matching of a Turbocharger to a Combustion Engine
Vondrák, Adam ; Beran, Martin (referee) ; Svída, David (advisor)
The master’s thesis deals with methods of matching of a turbocharger to a combustion engine and with the analysis of their mutual cooperation. Besides a methodology of analytical determination of the appropriate size for compressor and turbine stage, there was created a thermodynamic model of an engine that is to be used as a means of propulsion for a prototype single-seater for the competition Formula Student. Post processing of real engine data measured on a dyno helped to create a parameter database that could be used for validation of the thermodynamic engine model and for deeper understanding of the system’s internal processes.
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Supercharging design for a 1.6L SI Engine
Švábíková, Anna ; Bazala, Jiří (referee) ; Beran, Martin (advisor)
This master’s thesis focuses on the problematics of supercharging of SI engines aiming on performance boost. The aim of this thesis is to propose a suitable turbocharger for reaching defined performance goals. A method of successive SI engine modelling process is proposed, using the GT-Power platform. The choice of suitable turbocharger is based on a analytic calculation of required turbocharger parameters. The cooperation of the engine with the chosen turbocharger is verified by simulations. An important part of this thesis is sensitivity analysis, which purpose is to determine the impact of changing chosen parameters on maximum pressure in the combustion chamber and on the exhaust gas temperature.
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Smith Chart Visualization Tool
Marek, Martin ; Pokorný, Michal (referee) ; Kadlec, Petr (advisor)
The objective of my bachelor thesis was to create a Smith chart visualization tool in computing environment MATLAB. I created an impedance Smith chart in graphical user interface which delineate parameters of basic line types. Parameters of transmission lines can be defined in the Smith chart as normalized impedance, reflection coefficient, normalized admittance or impedance in combination with line’s characteristic impedance. It is also possible to design simple matching circuits, e.g. with quarter-wave transformer, series stub, parallel stub or matching circuits with lumped elements.
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Low noise amplifier for UHF band
Horký, Stanislav ; Baran, Ondřej (referee) ; Kasal, Miroslav (advisor)
The subject of this bachelor's thesis is description and design of low-noise RF amplifiers. This work is also focused on design and simulations of amplifier in Ansoft Designer software. In this thesis is in detail described design of amplifier ATF 54143, mainly focused on stability, biasing and noise matching. For the needs of RF applications are described a few types of filters, with his design and realization
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Low noise amplifier for UHF band
Horký, Stanislav ; Baran, Ondřej (referee) ; Kasal, Miroslav (advisor)
The subject of this bachelor's thesis is description and design of low-noise RF amplifiers. This work is also focused on design and simulations of amplifier in Ansoft Designer software. In this thesis is in detail described design of amplifier ATF 54143, mainly focused on stability, biasing and noise matching. For the needs of RF applications are described a few types of filters, with his design and realization
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