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System for Precise Measurement of Electrical Length of Coaxial Cables
Podr, Michal ; Polívka,, Milan (referee) ; Šebesta, Jiří (advisor)
This thesis describes a study of the measuring methods determining the electrical length of coaxial cable without using a vector network analyzer. First, a general theory of management and its various parameters is briefly discussed. This section is focused more specifically on the coaxial cable and its parameters. The next part is graphically analyzed process considerations in the design of measurement methods and outlined the block structure of the system. The third section describes the working process, prototype testing of the bridge, its measurement and design of the measuring system. In the fourth part the software is described. In conclusion, the results of the work are discussed, accuracy of the measurement system, the obtained parameters chosen with regard to the principle of the measurement system and the overall evaluation of the applicability in practice.
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Research on Effective Methods of Exhausting
Pech, Ondřej ; Kratochvíl, Zdeněk (referee) ; Černecký,, Jozef (referee) ; Pavelek, Milan (advisor)
Many production technologies generate a variety of gas pollutants, which are unhealthy. The aim is therefore to minimize the content of such gas pollutants in the work environment. The highest capture efficiency of gas pollutants offers the local exhausting. Its disadvantage is the necessity to surround the source of pollutants, or to be as close as possible which is usually not technically or technologically possible. A possible alternative is to use a reinforced exhaust system that achieves greater capture distances. In the initial stage of the solution of the dissertation, a review of reinforced exhaust systems was carried out. Further, an existing measurement system was modified for measurements with the partition above the exhaust slot and the measurement system was partially automated. In order to investigate the case with pollutants having a lower density than the air, the workbench - the partition was moved above the exhaust slot. Based on of the literature review, a modification of the reinforced slot exhaust system was proposed. The modification consisted in the adjustment of the air inlet adjustment where a set of holes and a tube assembly were used instead of the slot. Such setup allowed for higher flow turbulence and thus for an increased exhaust efficiency. Subsequently, the inlet streams from the slot, holes and tubes were visualized by the smoke method. Further measurements were carried out by the tracer gas method for the determination of the exhaust efficiency. Measurements of velocity fields in front of the proposed configurations of the reinforced slot exhaust hood were also carried out. In conclusion, an energy performance assessment was carried out by means of the measurement of the electric power input to the fans with the determination of the electric loss power.
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Tenis Hall
Hanáčík, Jan ; Pilgr, Milan (referee) ; Barnat, Jan (advisor)
This thesis describes design and assessment of the structure of tennis hall of a rectangular floor plan. The building is located in the city of Brno. The project is developed on two variants. The first option is a steel structure with lattice girders. The second option is a wooden construction with glued lamellar girders. The thesis is processed according to ČSN EN standards.
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Re-design of the clamping of GPS module for motorcycle
Jeniš, Filip ; Dočkal, Kryštof (referee) ; Klapka, Milan (advisor)
clamping, clamp, GPS, motorcycle, FEM, analysis, design, construction, construction alteration
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Garage with Fuel Station
Borkesz, Michael ; Pilgr, Milan (referee) ; Barnat, Jan (advisor)
Bachelor thesis presents the structural design of a load bearing steel structure of garage with roof construction of adjoining fuel station. The object is located in periphery area of Uherske Hradiste city, near Jarosov district. The ground plan dimensions are: 36 x 32 meters garage hall; 20 x 20 meters fuel station roofing. Heights of both construction tops are same – 10 meters above the surface. As the main material supporting elements was designed steel S355. The main supporting structure compose of trusses, which are hinged supported by columns. The roof deck is heat insulated, supported by purlins. The wall deck is simillar to roof deck, except of the front wall, which is partly composed of glass casing. At the both sides of garage hall are designed gates for vehicles. The roof deck of fuel station roof construction composes from one single trapezoidal sheet, also supported by purlins. The work contains structural design of individual elements, including mutual joints and anchoring. Calculations are performed according to standards of EN.
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Approximate Techniques for Markov Models
Andriushchenko, Roman ; Havlena, Vojtěch (referee) ; Češka, Milan (advisor)
In this work we discuss approximative techniques for the analysis of Markov chains, namely, state space aggregation and truncation. First, we focus on the application of the former method for the analysis of discrete-time models: we redesign the clustering algorithm to handle chains with an arbitrary structure of the state space and, most importantly, we improve upon existing bounds on the approximation error. The developed approach is then integrated with uniformisation techniques, in both standard and adaptive forms, to approximate continuous-time models as well as provide estimates of the approximation error. This theoretical framework along with existing truncation-based techniques were implemented within PRISM model checker. Experiments confirm that newly derived bounds provide a several orders of magnitude precision improvement without degrading performance. We show that the resulting aggregating approach can provide a valid model approximation supplied by adequate approximation error estimates, in both discrete and continuous time. Then, we perform a comparative analysis of aggregating and truncating techniques, illustrate how different methods handle various types of models, and identify chains for which aggregating, or truncating, analysis is preferred. Finally, we demonstrate a successful usage of approximative techniques for model checking Markov chains.
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Heart rate meter
Šeda, Jan ; Rampl, Ivan (referee) ; Chmelař, Milan (advisor)
The aim of the Bachelor thesis is summary of pulse measurement facilities. Heart pulse has been one of the basic measurable quantity in medical science for thousands of years. The basic quality of the given value is accuracy. The analyse of necessity of accuracy in methods for medical practice and diagnostic is the second point of the thesis. The third and most crucial point is heart pulse meter itself – it will be described in terms of mechanics, electrics and software. System based on optical measurement has been chosen in semestral project. Furthermore, accuracy of designed meter will be tested.
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Web Application for NS2 Training
Pavlosek, Václav ; Koutný, Martin (referee) ; Šimek, Milan (advisor)
There is information to my master's thesis which is called “Web application for NS2 training”. This application works after installation and its source codes are saved on applied CD. It is said about implement Network Simulator 2. It helps to realize simulation of nets and then author inserts information about them into web application. Registered web's visitor has possibility to insert project into application. The project contents information about simulation created in NS2. Web application can also visible detail of possible project which is approved of administrator. Then the visitor can sort projects, search entered expression or connect his contribution to discussion forum. Administrator can approve users projects in his part of application. It makes available for the others. He can also delete them from database. Theory about technologies which are used for implementation of this application. It is talked about web Apache server, database MySQL server and programmable PHP language. There is also mentioned information about security of web application included possible attacks on applications and their database. It is presented proposal of database which creates core of application. This proposal is depended on application requirements. Next chapters give to reader whole image about functionality of application. There are mentioned samples of final graphical image of application. This document also provides the shows of source codes for creating database tables.
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