Now showing items 11-18 of 18
Efficiency optimization of totem pole PFC with Gallium Nitride semiconductors
(WYDAWNICTWO SIGMA-NOT, 2021-06-01)
Novel Gallium Nitride wide bandgap semiconductor devices are capable of improving efficiency of power converters. This article presents a practical optimisation of GaN converter application in the totem-pole power factor ...
Numerical simulation and experimental visualization of the separated cavitating boundary layer over NACA2412
(EDP Sciences, 2015-05-06)
Cavitation is physical phenomenon of crucial impact on the operation range and service lifetime of the hydraulic machines (pumps, turbines, valves etc.). Experimental measurement of cavitation is expensive and time consuming ...
On the Selection of Integration Intervals for the Calculation of Mean Absorption Coefficients
(Springer US, 2015-10-18)
In radiation modeling of thermal plasmas non-grey models are applied where the radiative transport is described in several frequency bands (spectral intervals). Hereby mean absorption coefficients have to be calculated by ...
Topology Optimization of Rotor Bars Geometry and Arrangement for a Line-Start Permanent Magnet Synchronous Machine
An optimally designed line-start permanent magnet synchronous machine may require a different squirrel-cage design than traditional induction machines. The objective of this paper is to apply topology optimization based ...
Influence of metal vapours on radiation characteristics of air arc plasmas
This paper deals with the evaluation of radiation properties of air arc plasma with various admixtures of Cu, Ag, and Fe, respectively. Under assumption of isothermal plasma cylinder, the net emission coefficients were ...
Experimental model of occluded biliary metal stent recanalization using irreversible electroporation via a tubular catheter
(Taylor & Francis, 2021-03-07)
Purpose To demonstrate the feasibility of irreversible electroporation (IRE) for treating biliary metal stent occlusion in an experimental liver model. Methods and materials IRE was performed using an expandable tubular ...
Thermal protection implementation of the contact overheadline based on bay controllers of electric transport traction substations in the mining industry
(Saint Petersburg Minin University, 2021-10-29)
The article presents the principle of thermal protection of the contact overheadlineand substantiates the possibility of practical implementation of this principle for rail electric transport in the mining industry. The ...
TRIZ already 35 years in the Czech Republic
(Elsevier B.V., 2016-02-10)
In this paper the authors summarize the experience of teaching and implementation TRIZ at technical universities and findings from teaching and applications in companies in the Czech Republic and Slovakia for the last 35 years.