Prohlížení Acta Polytechnica dle názvu
Zobrazují se záznamy 164-183 z 880
-
COMPARATIVE STUDY AND EMPIRICAL MODELLING OF PULVERIZED COCONUT SHELL, PERIWINKLE SHELL AND PALM KERNEL SHELL AS A POZZOLANS IN CONCRETE
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)Infrastructural development across the world is fast growing due to the rapid growth in population. This has resulted in consequently creating an increase in the demand for construction materials, especially cement. This ... -
Comparative study of state space averaging and PWM with extra element theorem techniques for complex cascaded DC-DC Buck converter
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)Until now, most commonly used state space averaging and PWM techniques have been applied to different converter topologies and their advantages and disadvantages were stated. However, the superiority of an analytical ... -
Comparision of the walk techniques for fitness state space analysis in vehicle routing problem
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)The Vehicle Routing Problem (VRP) is a highly researched discrete optimization task. The first article dealing with this problem was published by Dantzig and Ramster in 1959 under the name Truck Dispatching Problem. Since ... -
COMPARISON BETWEEN 2D TURBULENCE MODEL ESEL AND EXPERIMENTAL DATA FROM AUG AND COMPASS TOKAMAKS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)In this article we have used the 2D fluid turbulence numerical model, ESEL, to simulate turbulent transport in edge tokamak plasma. Basic plasma parameters from the ASDEX Upgrade and COMPASS tokamaks are used as input for ... -
COMPARISON OF ACTUAL GROUND SETTLEMENTS IN TUNNELLING EXCAVATION TO MODEL PREDICTIONS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)It has been discovered that the underground structures are vulnerable to seismic phenomena mainly due to permanent ground deformations caused by earthquakes rather than the dynamic seismic movement itself. Several models ... -
COMPARISON OF AXIAL FAN ROTOR EXPERIMENTAL DATA WITH CFD SIMULATION
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)Data obtained from an experimental simulation on a new test rig for axial fans are compared to a CFD simulation. The Edge solver is used and the development needed for the simulation (boundary conditions, free stream ... -
COMPARISON OF CLASSICAL AND INTERACTIVE MULTI-ROBOT EXPLORATION STRATEGIES IN POPULATED ENVIRONMENTS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)Multi-robot exploration consists in coordinating robots for mapping an unknown environment. It raises several issues concerning task allocation, robot control, path planning and communication. We study exploration in ... -
COMPARISON OF COOLING SCHEMES FOR HIGH HEAT FLUX COMPONENTS COOLING IN FUSION REACTORS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)Some components of the fusion reactor receives high heat fluxes either during the startup and shutdown or during the operation of the machine. This paper analyzes different ways of enhancing heat transfer using helium and ... -
COMPARISON OF ENERGY FLOW STREAM AND ISENTROPIC METHOD FOR STEAM TURBINE ENERGY ANALYSIS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)In this paper, a comparison of two different methods for a steam turbine energy analysis is presented. A high-pressure steam turbine from a supercritical thermal power plant (HPT) was analysed at three different turbine ... -
COMPARISON OF EXPLORATION STRATEGIES FOR MULTI-ROBOT SEARCH
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)Searching for a stationary object in an unknown environment can be formulated as an iterative procedure consisting of map updating, selection of a next goal and navigation to this goal. It finishes when the object of ... -
COMPARISON OF MATHEMATICAL MODELS FOR HEAT EXCHANGERS OF UNCONVENTIONAL CHP UNITS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)An unconventional CHP unit with a hot air engine is designed as the primary energy source with fuel in the form of biomass. The heat source is a furnace designed for combustion of biomass, whether in the form of wood logs ... -
COMPENSATION OF SPRINGBACK IN LARGE SHEET METAL FORMING
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)A precise production of sheet metal parts has always been a main goal in press shops. Highest quality demands are required especially in automotive production. Unfortunately, even today, the production is not optimal due ... -
Complex Covariance
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)According to some generalized correspondence principle the classical limit of a non-Hermitian quantum theory describing quantum degrees of freedom is expected to be the well known classical mechanics of classical degrees ... -
Complex topological soliton with real energy in particle physics
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)We summarise the procedure used to find the classical masses of Higgs particle, massive gauge boson and t’Hooft-Polyakov monopole in non-Hermitian gauge field theory. Their physical regions are explored, and the mechanism ... -
COMPLEXITY REDUCTION OF CYCLOSTATIONARY SENSING TECHNIQUE USING IMPROVED HYBRID SENSING METHOD
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)In cognitive radio system, the spectrum sensing has a major challenge in needing a sensing method, which has a high detection capability with reduced complexity. In this paper, a low-cost hybrid spectrum sensing method ... -
Compression behaviour and failure mechanisms of a safety culvert made of hollow high-performance concrete blocks
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)The safety culvert composed of hollow high-performance concrete blocks is designed to reduce the risk of injury in the event of a collision. This work presents a new design with an opening for water flow, tests it, identifies ... -
COMPUTATIONAL AERODYNAMIC OPTIMIZATION OF LOW-SPEED WING
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)An optimization method consisting of genetic and evolution optimization algorithm and a solver using nonlinear aerodynamics was applied on design of low-speed wing. Geometric parameterization of wing uses standard geometric ... -
COMPUTATIONAL METHODOLOGY TO ANALYZE THE EFFECT OF MASS TRANSFER RATE ON ATTENUATION OF LEAKED CARBON DIOXIDE IN SHALLOW AQUIFERS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)Exsolution and re-dissolution of CO2 gas within heterogeneous porous media are investigated using experimental data and mathematical modeling. In a set of bench-scale experiments, water saturated with CO2 under a given ... -
COMPUTATIONAL SCHEMES FOR THE PROPAGATION OF ULTRA HIGH ENERGY COSMIC RAYS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)We discuss the problem of ultra high energy particles propagation in astrophysical backgrounds. We present two different computational schemes based on kinetic and Monte Carlo approaches. The kinetic approach is an analytical ... -
Computer Simulation of a Plasma Vibrator Antenna
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The use of new plasma technologies in antenna technology is widely discussed nowadays. The plasma antenna must receive and transmit signals in the frequency range of a transceiver. Many experiments have been carried out ...