Procházení Acta Polytechnica. 2022, vol. 62 dle data publikování
Zobrazují se záznamy 41-60 z 66
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Improvement of spectrum sensing performance in cognitive radio using modified hybrid sensing method
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Cognitive radio (CR) is a wireless technology for increasing the bandwidth usage. Spectrum sensing (SS) is the first step in CR. There are three basic techniques in SS, energy detection (ED), matched filter (MF), and ... -
Load carrying capacity of masonry arch railway bridges at the serviceability limit state
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This article focuses on masonry arch railway bridges. The main topic is the algorithm, which was developed for the purpose of a non-linear arch bridge analysis. The sensitivity analysis of the input parameters of the ... -
Analysis of factors affecting the efficiency of Jatropha curcas oil as an asphaltene stabiliser
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The effect of temperature and applied dose on the efficiency of Jatropha curcas seed oil as an asphaltene stabiliser was studied. Two crude oil samples (light and medium) were used. J. curcas oil was subjected to heating ... -
Determination of loads on the body of a boxcar with elastic elements in the center sill
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The authors suggest elastic elements in the body of a centre sill being the basic carrying element of the frame to decrease the dynamic loads. This solution can transform the dynamic loads on the body into the work of the ... -
A mindlin shell finite element for stone masonry bridges with backfill
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Stone masonry bridges are difficult to analyse with commercial finite element (FE) packages for their specific heterogeneous composition. The stone arch is best modelled as a thick shell where there are predestined directions ... -
Measurement of a quantum particle position at two distant locations: a model
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)A simplified one-dimensional model of measurement of the position of a quantum particle by two distant detectors is considered. Detectors are modelled by quantum particles bounded in potential wells with just two bound ... -
Experimental verification of the impact of the air staging on the NOx production and on the temperature profile in a BFB
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The results of an experimental research on air staging in a bubbling fluidized bed (BFB) combustor are presented within this paper. Air staging is known as an effective primary measure to reduce NOX formation. However, in ... -
Experimental verification of the efficiency of selective non-catalytic reduction in a bubbling fluidized bed combustor
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Controlling nitrogen oxide (NOX) emissions is still a challenge as increasingly stringent emission limits are introduced. Strict regulations will lead to the need to introduce secondary measures even for boilers with ... -
Theoretical and experimental study of water vapour condensation with high content of non-condensable gas in a vertical tube
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This article deals with the possibility of separating water vapour from flue gases after oxyfuel combustion using condensation processes. Those processes can generally be described as condensation of water vapour in the ... -
Concrete lintels reinforced with steel fibres oriented by a magnetic field
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This paper explores the possibility of applying the technique of magnetic orientation of steel fibres for manufacturing a concrete structural element of realistic dimensions, compared to small laboratory specimens. This ... -
Applicability of Secondary Denitrification Measures on a Fluidized Bed Boiler
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This article compares performance of selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) applied on the same pilot unit, a 500 kW fluidized bed boiler burning Czech lignite. Correlation of the ... -
Disinfection performance of an ultraviolet lamp: a CFD investigation
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Ultraviolet (UV)-based devices have shown their effectiveness on various germicidal purposes. To serve their design optimisation, the disinfection effectiveness of a vertically cylindrical UV lamp, whose wattage ranges ... -
Experimental study of the torsional effect for yarn break load test of polymeric multifilaments
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Polymeric multifilaments have gained a significant interest in recent decades. In the studies of mechanical characteristics, although there are different types of tests, such as rupture, abrasion, creep, impact and fatigue, ... -
The engineering performance of eco-friendly concretes containing diatomite fly ash and ground granulated blast furnace slag
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Approximately 10 % of CO2 is emitted from an ordinary Portland cement production. In cement and concrete production, CO2 emissions can be greatly reduced by using Supplementary Cementitious Materials (SCMs). In addition, ... -
CFD simulation of partial channel blockage on plate-type fuel of TRIGA-2000 conversion reactor core
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)A nuclear reactor cooling system that has been operating for a long time can carry some debris into a fuel coolant channel, which can result in a blockage. An in-depth two-dimensional simulation of partial channel blockage ... -
Effect of membrane separation process conditions on the recovery of syngas components
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The presented study focuses on inspecting the dependency between process conditions, especially permeate and retentate pressure and component recovery of H2, CO, and CO2 during a membrane separation of model syngas. ... -
Analysis of parameters important for indirect drying of biomass fuel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This paper focuses on biomass drying for the design and operation of an indirect dryer used in a biomass power plant. Indirect biomass drying is not as well described process as direct drying, especially when used for the ... -
Cyclic response of RC beam-column joints strengthened with transverse steel bars and with C-FRP diagonal ties
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The use of additional bars, internally placed through drill holes, in external beam-column connections subjected to cyclic loading, as shear reinforcement is experimentally investigated.The presented experimental work ... -
Parametric study of the energy potential of a building’s envelope with integrated energy-active elements
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Building structures with integrated energy-active elements (BSIEAE) present a progressive alternative for building construction with multifunctional energy functions. The aim was to determine the energy potential of a ... -
Design and simulation of a bearing housing aerospace component from titanium alloy (Ti6Al4V) for additive manufacturing
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In evaluating emerging technology, such as additive manufacturing, it is important to analyse the impact of the manufacturing process on efficiency in an objective and quantifiable manner. This study deals with the design ...