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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Vliv optických prvků na účinnost světlovodu / Influence of optical elements on the tubular skylights efficiency

Nekvapil, Jan January 2017 (has links)
This thesis deals with the measurement of light tubes efficiency in laboratory conditions during lighting by almost direct light rays. It also deals with the measurement of the spectral reflectance of the reflective materials available on the Czech market. The comparison of the efficiency of different light routes and also the determination of the spectral qualities of different reflective materials are the aims of this thesis. The light tubes were measured by means of the cubic integrator. The light source was moved and manoeuvred by means of the automatic goniophotometer. The light source flow was determined by the method of the zonal flows. The data were calculated in the Matlab programme. The evaluation is both in the graphic and in the numeric forms. The result of the thesis is both the comparison of the reflective materials for light tubes qualities, and the evaluation of efficiency of the assigned light routes. The optimal variant can be then selected during designing of the light tubes route according to the results of the measurements.
22

Jednofázový střídač s výstupními parametry 230 V / 50 Hz / 100 VA / Single-phase DC/AC converter with output parameters 230 V / 50 Hz / 100 VA

Smolák, Martin January 2019 (has links)
This master‘s thesis focuses on optimization of power and control circuits of an inverter, which was developed at UVEE. The principle of function and circuit implementation of a single-phase inventer, various calculations (design of an LC filter, DC link capacitor, semiconductor elements and heat sink) are described in the thesis. A design of fast overcurrent protections, oscillator and saw signal generator is included. Furthermore, a printed circuit board was designed which was optimized by thermal simulation in the Workbench Ansys. Subsequently, the printed circuit board was mounted, debugged and verification measurements were performed on it. At the end of the thesis there is a documentation for the implemented equipment.
23

Návrhy marketingové strategie firmy / Marketing Strategy of Company

Trtílková, Lucie January 2007 (has links)
This Diploma thesis concretely analyses methods promotion of products, meaning of marketing department in a company and means of promotion efficiency meansurement. It further analyses existing marketing structure of the company Tescan, Ltd. and it contains recommendations and proposals of improvement present position for this company.

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