Prohlížení Acta Polytechnica dle názvu

Zobrazují se záznamy 171-190 z 880

    • COMPARISON OF COOLING SCHEMES FOR HIGH HEAT FLUX COMPONENTS COOLING IN FUSION REACTORS 

      Autor: Domalapally , Phani Kumar; Entler , Slavomir
      (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 

      Autor: Blažević , Sebastijan; Mrzljak , Vedran; Anđelić , Nikola; Car , Zlatan
      (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 

      Autor: Kulich , Miroslav; Juchelka , Tomáš; Přeučil , Libor
      (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 

      Autor: Durcansky , Peter
      (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 

      Autor: Pačák , Tomáš; Tatíček , František; Valeš , Michal
      (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 

      Autor: Kleefeld , Frieder
      (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 

      Autor: Taira, Takanobu
      (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 

      Autor: Abdullah , Hikmat N.; Dawood , Zinah O.; Abdelkareem , Ammar E.; Abed , Hadeel S.
      (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 

      Autor: Hála, Petr; Šmejkal, Filip; Sovják, Radoslav
      (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 

      Autor: Lahuta , Martin; Pátek , Zdeněk; Szöllös , András
      (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 

      Autor: Fučík, Radek; Solovský, Jakub; Plampin, Michelle R.; Wu, Hao; Mikyška, Jiří; Illangasekare, Tissa H.
      (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 

      Autor: Aloisio, Roberto
      (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 

      Autor: Bogachev , Nikolay N.; Bogdankevich , Irina L.; Gusein-zade , Namik G.; Tarakanov , Vladimir P.
      (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 ...

    • Concepts of Emission Reduction in Fluidized Bed Combustion of Biomass 

      Autor: Purgar , Amon; Winter , Franz
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      A status report on fluidized bed technology in Austria is under preparation, in response to the Fluidized Bed Conversion multi-lateral technology initiative of the International Energy Agency. This status report focuses ...

    • Concrete lintels reinforced with steel fibres oriented by a magnetic field 

      Autor: Carrera, Kristýna; Künzel, Karel; Konrád, Petr; Sovják, Radoslav; Papež, Václav; Mára, Michal; Fornůsek, Jindřich; Kheml, Přemysl
      (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 ...

    • CONDENSATION OF WATER VAPOR IN A VERTICAL TUBE CONDENSER 

      Autor: Havlík , Jan; Dlouhý , Tomáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      This paper presents an analysis of heat transfer in the process of condensation of water vapor in a vertical shell-and-tube condenser. We analyze the use of the Nusselt model for calculating the condensation heat transfer ...

    • Conserved quantities in non-hermitian systems via vectorization method 

      Autor: Agarwal, Kaustubh S.; Muldoon, Jacob; Joglekar, Yogesh N.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      Open classical and quantum systems have attracted great interest in the past two decades. These include systems described by non-Hermitian Hamiltonians with parity-time (PT) symmetry that are best understood as systems ...

    • CONSTITUTIVE MODEL OF STEEL FIBRE REINFORCED CONCRETE SUBJECTED TO HIGH TEMPERATURES 

      Autor: Blesak , Lukas; Goremikins , Vadims; Wald , Frantisek; Sajdlova , Tereza
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      Research on structural load-bearing systems exposed to elevated temperatures is an active topic in civil engineering. Carrying out a full-size experiment of a specimen exposed to fire is a challenging task considering not ...

    • CONSTRAINING SPACETIME TORSION WITH THE MOON, MERCURY AND LAGEOS 

      Autor: March, Riccardo; Bellettini, Giovanni; Tauraso, Roberto; Dell’Agnello, Simone
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We consider an extension of Einstein General Relativity where, beside the Riemann curvature tensor, we suppose the presence of a torsion tensor. Using a parametrized theory based on symmetry arguments, we report on some ...

    • Construction of angular-dependent potentials from trigonometric Pöschl-Teller systems within the Dunkl formalism 

      Autor: Schulze-Halberg, Axel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      We generate solvable cases of the two angular equations resulting from variable separation in the three-dimensional Dunkl-Schrödinger equation expressed in spherical coordinates. It is shown that the Dunkl formalism ...