• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 7
  • Tagged with
  • 7
  • 7
  • 3
  • 3
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 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.
1

Parametrické zkoušky plazmové svařování kořene svaru / Parametric testing plasma welding on the root of weld

Záškoda, David January 2010 (has links)
The subject of this thesis is to assess the suitability of the new process of welding roots of welds by the rotors of steam turbines plasma jet. The new proposed method uses a combination of welding the weld root plasma with the method of submerged-arc welding, however the submerged-arc welding is not subjekt of this work. The tests performed were verified by the possibility of welding the weld root of the plasma jet – Keyhole method without filler material. The aim was to find the optimum welding parameters to achieve the required weld quality, particularly with regard to geometry of weld. Turbine rotors are made of heat resistant steels, which have high strength at high temperatures. In all described tests have been used steel 30CrMoNiV 5-11....Mat. No. 1.6946.
2

Porovnání navařování svazkem elektronů a plazmou / Comparison of cladding by the electron beam and plasma process

Rudyk, Martin January 2014 (has links)
This diploma thesis deals with plasma cladding and electron beam cladding. The theoretical part is divided into several chapters which is focused on description of these methods of cladding process. In the practical part the particular experiment of electron beam cladding (EBC) and plasma cladding (PC) is described. In the conclusion overall results were assessed, both methods were compared each other and possible exploitation in industry was described.
3

Racionalizace malosériové výroby výpalků v podmínkách firmy PARS Nova a.s. / Rationalization of small-lot production of slops in conditions of company PARS Nova a.s.

Jurka, Pavel January 2008 (has links)
Analysis of the technological possibility ray methods of protoplasm, laser and water jet on the part of needs company Pars Nova a.s.. Propsal concrete of unconventional method. Process layout and exigencies of working designed method. Security and ecological diversification of designed method. Technical – economics evaluation contribution designed of unconventional technology.
4

Technologie výroby plechového dílu / Technology of production part of sheet

Bartusek, Břetislav January 2012 (has links)
The aim of diploma thesis is to design technology components production orders. For a given part of the technology will be used non conventional deep drawing Wheelon method. For manufacturing lengthwise recesses and consequent cutting of shaped holes using a plasma cutting. The suitability of technological applications will be tested using the cost functions.
5

Hodnocení obsahu glutathionu v rostlinách jako markeru znečištění životního prostředí těžkými kovy / Evaluation of glutathione content in plants as a marker of heavy metals environmental contamination

Borková, Marie January 2008 (has links)
Dependence of glutathione concentration on the amount of thallium in the plant was studied. Observed plant was maize (Zea mays) which was divided to two parts – root and overground. Two culture procedures were elaborated where seeds and young seedlings were cultivated in a solution of thallium of concentration 0, 1, 3, 5, 8, a 10 µmol/l. Extraction agents used during extraction were phosphate buffer and solution of ascorbic acid. Determination of glutathione was realized by capillary electrophoresis (CE) and high performance liquid chromatography (HPLC). Diode array detector (DAD) was used in both methods. Quantification of the thallium amount in the plant was done by method of inductively coupled plasma-atomic emission spectrometry (ICP-AES).
6

Aplikace nekonvenčních paprskových technologií(LASER/plazma)ve strojírenství / Application of unconventional jet technology (LASER/plasma) in machine

Šebela, Pavel January 2008 (has links)
The description and characteristic of the material cutting process technology by means of laser and plasma beams. The safety of both technologies. Technical-economic comparison of both material cutting methods. The evaluation of the cutting quality according to ČSN EN ISO 9013 Standard.
7

Využití bezmembránové elektrolytické cely pro elektrochemické generování těkavých specií přechodných kovů / Application of non-membrane electrolytic cell for electrochemical volatile species generation of transition metals

Kobrlová, Andrea January 2013 (has links)
This diploma thesis is focused on the study of electrochemical generation volatile species of gold and silver. Two non-membrane electrolytic cells were constructed for electrochemical generation volatile species. These cells differ in the volume of electrode chamber. An atomic absorption spectrometry with quartz tube atomizer was used in most experiments. The equipment was performed in flow continuous mode. Experiments confirmed, that it is possible to use an atomic absorption spectrometry with quartz tube atomizer for generate volatile species of gold and silver by using two non-membrane electrolytic cells. The main part of this thesis was to find optimal conditions for the electrochemical generation of volatile species of gold and silver. These optimized parameters were: the cathode material, the type of electrolyte, the flow rate of the carrier gas, the generation current and the electrolyte flow rate. The calibration curves for both analytes were measured for both non-membrane electrolytic cells and the basic characteristics of the measurement were observed. Detection limit for electrochemical generation of gold was 1,61mg dm 3 and repeatability 3,93 %, detection limit for electrochemical generation of silver was 0,20 mg dm 3 and repeatability 7,33 %. Thanks to the experiments with a...

Page generated in 0.0328 seconds