National Repository of Grey Literature 301 records found  beginprevious21 - 30nextend  jump to record: Search took 0.00 seconds. 
Methodology for calibration of containers and tanks
Vrátil, Šimon ; Brno, Miroslava Benková, ČMI OI (referee) ; Vdoleček, František (advisor)
This diplomathesis work is dealing with a concept of volumetric calibration of vessels using the volumetric method. The analysis considers current regulations together with influence of uncertainties in measurements. The principal part of the thesis is analysis of metrological uncertainties resulting from application of various volumetric methods during the calibration process. A practical outcome from this research is development of metrological process for calibration of vessels that could be used by the accredited laboratories.
Four-electrode impedance plethysmograph
Port, Martin ; Kolář, Radim (referee) ; Chmelař, Milan (advisor)
This master’s thesis is an introduction to the measurement of changes in tissue impedance of blood flow by impedance plethysmography. Other chapters deal with the kinds of plethysmographs and their principles. The aim is to draft four-electrode impedance plethysmograph to measure changes in tissue impedance depending on blood flow. First, describe the individual blocks of the medical instrument. The practical part of the master’s thesis involves circuit design four-electrode plethysmograph. Given that a very important role in its function plays a constant current source operating at a frequency of 60kHz, this subset was implemented and verified its correct function. To draw component schemes used program EAGLE version 5.10.0.
Measurement of indoor environment by means of thermal manikin
Ševeček, Jan ; Pokorný, Jan (referee) ; Fišer, Jan (advisor)
This dissertation deals with the measurement of the internal environment through thermal manikin Newton, especially in terms of thermal comfort. Measurements were performed in a typical office environment and cabins of small transport aircraft. The course of events and the time constants for the measurement in the office was given by real flow in the office when the sequences of events were unfolded from the usual transactions carried out during the day. In contrast, the second measurement, which took place in the model of small transport aircraft, the course of events and time constants, was performed exactly according to predetermined plan. The other parts of the thesis describe how to calibrate the manikin and then generate a diagram comfort zones. Following are compared individual test cases and events using the diagram comfort zones. Finally, individual test cases and events are compared using the diagram comfort zones and medics according to ISO 14505-2.
Monitoring and calibration of machine tools and coordinate measuring machines
Žák, František ; Vetiška, Jan (referee) ; Holub, Michal (advisor)
This is a bachelor´s thesis concerning the retrieval of monitoring and calibration of machine tools and coordinate measuring machines, used in many different industries. The main points of the work is introduction to different measurement procedures according to standards, calibration procedures and their application.
Gas sensors, their construction and testing
Zbožínek, Štěpán ; Prášek, Jan (referee) ; Pytlíček, Zdeněk (advisor)
The presented bachelor´s thesis deals with gas sensors, their construction and methods of testing. First part shortly describes the problems of gas detection. There are introduced common principles, constructions, examples of possible applications and requirements, which should be complied with gas sensors. In more detail, there are described conductivity gas sensors. Main purpose of the work is draft software equipment determined for compiled mixing station. For check correct function of the program was also done several measurements with gas sensors containing active layer SnO2 created for oxygen detection. In conclusion, there is on the base of collected theoretical pieces of knowledge and measured information discussed accuracy of measurement, and limits of usability station.
Speaker Recognition in the VoIP Environment
Remeš, Jan ; Pešán, Jan (referee) ; Plchot, Oldřich (advisor)
Tato práce popisuje použití systémů pro rozpoznávání mluvčího v~prostředí VoIP, úspěšnost systému a přístupy k jejímu zlepšení. Popisuje architekturu těchto systémů, metriky pro vyhodnocení jejich úspěšnosti a klíčové komponenty VoIP z hlediska rozpoznávání mluvčího. Je zde popsáno vytvoření simulace VoIP prostředí, úspěšnost systému je vyhodnocena na datech pocházejících z různých druhů VoIP prostředí a výsledky jsou demostrovány. Adaptace a kalibrace systému je provedena a jejich přínosy zhodnoceny.
Documentation of Skalní zámek passage in Býčí skála cave - northern part
Langar, Tomáš ; Weigel, Josef (referee) ; Kratochvíl, Radim (advisor)
My bachelor thesis deals with speological mapping parts of cave system Býčí skála - Skalní zámek. Detailed measurements of plan view map are carried out with electronic method –through combination of measuring equipment DistaX2 and software application TopoDroid per the appropriate tablet. The resulting map is formed in the program Therion. The course of my bachelor thesis involves handling of apparatus and the instruction how to measure then process the data. The introductory part is devoted to the localization and extent of the thesis. The instructions of used surveying and software device are described in the subsequent parts. The final section is related to comparisons of mining suspension compasses.
Measurement uncertainties in calibration of vibration sensors
Pražák, Jiří ; Uher, Miroslav (referee) ; Šedivá, Soňa (advisor)
This thesis deals with the research of uncertainties of the vibration sensor calibration measurement. The analysis of individual calibration methods of vibration sensors is also carried out in this thesis. Next, measurement of uncertainties for secondary calibration of the vibration sensors are analysed. The experimental part of this work is focused on determining the influence of different elements to type A uncertainty of vibration sensors uncertainty calculation. Experimental measurement was performed in an accredited laboratory for measurement and calibration of vibration sensors at FEEC BUT. Calculation of uncertainties of secondary calibration is also carried out in this thesis.
Measuring videomicroscope
Černý, Jakub ; Petyovský, Petr (referee) ; Janáková, Ilona (advisor)
This thesis focuses on the interconnection of CCD camera with microscope, which should lead to creation of universal tool for measuring objects under the scope.
Calibration of the high-speed traffic microsimulation
Korček, Pavol ; Apeltauer, Tomáš (referee) ; Pospíchal, Jiří (referee) ; Sekanina, Lukáš (advisor)
Tato disertační práce je zaměřena na vysokorychlostní simulace dopravy a jejich přesnou kalibraci pomocí různých typů dopravních dat. Práce se po úvodním popisu motivace pro samotný výzkum nejdříve věnuje současnému stavu poznání, a dále rozdělení simulátorů dopravy, zejména podle typu dat, se kterými se v nich pracuje. Úpravou existujícího řešení je navržen vlastní mikrosimulační model, který je založen na principu celulárního automatu. S tímto novým modelem je pak experimentováno, zpočátku z pohledu rychlosti simulace a další rozšiřitelnosti. Je navržena a popsána technika, kterou je možné navržený model významně akcelerovat a následně provádět simulace rychleji než v reálném čase i pro rozsáhlá území. Práce dále přistupuje k samotné kalibraci modelu, ke které byl využit evoluční přístup. Je představena metoda pro efektivní způsob optimalizace parametrů mikrosimulačního modelu, která nevyžaduje citlivostní analýzu a je schopná nalézt jinak obtížně nastavitelné parametry modelu. Kvalita získaných optimalizovaných modelů byla analyzována jak pomocí makroskopických, tak i mikroskopických dopravních dat, a to i s ohledem na jejich reálné vlastnosti, tj. chybějící vzorky. Dále jsou zhodnoceny výkonnostní a jiné kvalitativní parametry vlastního přístupu v porovnání s existujícími řešeními, přičemž bylo dosaženo významného zlepšení. Nakonec jsou představeny nástroje, které v rámci řešení vznikly. Na závěr je uvedeno další zaměření výzkumu, a to zejména s ohledem na využití výsledků práce v praxi.

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