Acta Polytechnica. 2016, vol. 56: Poslední příspěvky

Zobrazují se záznamy 21-40 z 61

    • EXPERIMENTAL EVALUATION OF WEDM MACHINED SURFACE WAVINESS 

      Autor: Mouralova , Katerina; Kovar , Jiri; Houska , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      Wire Electrical Discharge Machining (WEDM) an unconventional machining technology which has become indispensable in many industries. The typical morphology of a surface machined using the electrical discharge technology ...

    • ANALYSIS OF INTENSIVELY BLASTED ELECTRIC ARC BURNING IN THE ARC HEATER'S ANODE CHANNEL 

      Autor: Senk , Josef; Jakubova , Ivana; Laznickova , Ilona
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      The paper deals with the description of the intensively blasted electric arc burning in Ar in the anode channel of the arc heater operated under various conditions. Directly measured experimental data (current, voltage, ...

    • COVARIANT INTEGRAL QUANTIZATIONS AND THEIR APPLICATIONS TO QUANTUM COSMOLOGY 

      Autor: Gazeau , Jean-Pierre
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      We present a general formalism for giving a measure space paired with a separable Hilbert space a quantum version based on a normalized positive operator-valued measure. The latter are built from families of density operators ...

    • ON THE CONSTRUCTION OF PARTIAL DIFFERENCE SCHEMES II: DISCRETE VARIABLES AND SCHWARZIAN LATTICES 

      Autor: Levi , Decio; Rodriguez A., Miguel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      In the process of constructing invariant difference schemes which approximate partial differential equations we write down a procedure for discretizing a partial differential equation on an arbitrary lattice. An open problem ...

    • ON PARTIAL DIFFERENTIAL AND DIFFERENCE EQUATIONS WITH SYMMETRIES DEPENDING ON ARBITRARY FUNCTIONS 

      Autor: Gubbiotti , Giorgio; Levi , Decio; Scimiterna , Christian
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      In this note we present some ideas on when Lie symmetries, both point and generalized, can depend on arbitrary functions. We show a few examples, both in partial differential and partial difference equations where this ...

    • APPLICATION OF DIMENSIONAL ANALYSIS IN HEAT LOSS DETERMINING IN DISTRICT HEATING SYSTEMS 

      Autor: Čarnogurská , Mária; Dobáková , Romana; Příhoda , Miroslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      Existing procedures for determining the heat loss in heat distribution use balance relations, or rather they are based on the theory of heat and mass transfer. Dimensional analysis enables a new point of view that demonstrated ...

    • ON CUBATURE RULES ASSOCIATED TO WEYL GROUP ORBIT FUNCTIONS 

      Autor: Háková , Lenka; Hrivnák , Jiří; Motlochová , Lenka
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      The aim of this article is to describe several cubature formulas related to the Weyl group orbit functions, i.e. to the special cases of the Jacobi polynomials associated to root systems. The diagram containing the relations ...

    • AN EXPERIMENTAL ASSESSMENT OF THE PLATE HEAT EXCHANGER CHARACTERISTICS BY WILSON PLOT METHOD 

      Autor: Opatřil , Jan; Havlík , Jan; Bartoš , Ondřej; Dlouhý , Tomáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      An aim of this paper is suggestion of the evaluation method based on the experimental data and the Wilson plot method for the Plate Heat Exchangers (PHE). For the purpose of the project the new experimental loop was built ...

    • A METHOD FOR MEASURING THE SENSITIVITY OF BUILDING STRUCTURAL MEMBERS TO FIRE DECAY PHASES 

      Autor: Gernay , Thomas
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      Firefighters face a major threat when intervening in a building during a fire: the possibility of structural collapse during the cooling phase of the fire, or soon thereafter. At present, this threat is amplified by the ...

    • OPTIMALIZATION OF AFTERBURNER CHANNEL IN BIOMASS BOILER USING CFD ANALYSIS 

      Autor: Pospíšil , Jiří; Lisý , Martin; Špiláček , Michal
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      This contribution presents the results of parametrical studies focused on the mixing process in a small rectangular duct within a biomass boiler. The first study investigates the influence of a local narrowing located in ...

    • THE GOODNESS OF SIMULTANEOUS FITS IN ISIS 

      Autor: Kühnel , Matthias; Falkner , Sebastian; Grossberger , Christoph; Ballhausen , Ralf; Dauser , Thomas; Schwarm , Fritz-Walter; Kreykenbohm , Ingo; Nowak A., Michael; Pottschmidt , Katja; Ferrigno , Carlo; Rothschild E., Richard; Martínez-Núñez , Silvia; Torrejón , José Miguel; Fürst , Felix; Klochkov , Dmitry; Staubert , Rüdiger; Kretschmar , Peter; Wilms , Jörn
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      In a previous work, we introduced a tool for analyzing multiple datasets simultaneously, which has been implemented into ISIS. This tool was used to fit many spectra of X-ray binaries. However, the large number of degrees ...

    • ASTRONOMICAL GLASS PLATE NEGATIVES: MONITORING OF EMULSION LAYER DETERIORATION 

      Autor: Miskova , L.; Novák , P.; Hudec , R.; Novotná , M.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      One of the techniques for making photographic negatives most used in the history of photography were gelatin glass plates. This technique was used not only in the artistic field but also and mainly in the scientific field. ...

    • ADAPTIVE DISTRIBUTION OF A SWARM OF HETEROGENEOUS ROBOTS 

      Autor: Prorok , Amanda; Ani Hsieh , M.; Kumar , Vijay
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      We present a method that distributes a swarm of heterogeneous robots among a set of tasks that require specialized capabilities in order to be completed. We model the system of heterogeneous robots as a community of species, ...

    • RELATIONSHIP BETWEEN COMPACTING PRESSURE AND CONDITIONS IN PRESSING CHAMBER DURING BIOMASS PRESSING 

      Autor: Križan , Peter; Matúš , Miloš; Beniak , Juraj
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      In this paper, we will present the impact of the conditions in pressing chambers during the pressing of wooden briquettes. The conditions in pressing chambers can significantly impact the resulting compacting pressure ...

    • ANALYSIS OF WELD JOINT DEFORMATIONS BY OPTICAL 3D SCANNING 

      Autor: Urminsky , Jan; Marônek , Milan; Jáňa , Miroslav; Morovič , Ladislav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      This paper presents an analysis of weld joint deformation using optical 3D scanning. The weld joints of bimetals were made by explosion welding (EXW). GOM ATOS II TripleScan SO MV320 equipment with measuring volume 320 × ...

    • MULTIROBOT MOTION PLANNING: A MODIFIED RECEDING HORIZON APPROACH FOR REACHING GOAL STATES 

      Autor: Mendes Filho M., José; Lucet , Eric
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      This paper proposes the real-time implementation of an algorithm for collision-free motion planning based on a receding horizon approach, for the navigation of a team of mobile robots in presence of obstacles of different ...

    • COMPARISON OF AXIAL FAN ROTOR EXPERIMENTAL DATA WITH CFD SIMULATION 

      Autor: Prachař , Aleš
      (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 ...

    • MAGNETRON SPUTTERING WITH HOT SOLID TARGET: THERMAL PROCESSES AND EROSION 

      Autor: Borduleva Olegovna, Alena; Bleykher Alekseevna, Galina; Sidelev Vladimirovich, Dmitrii; Krivobokov Pavlovich, Valeriy
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      This work focuses on erosion and thermal processes taking place on the surface of the titanium target in magnetron sputtering. The study was carried out using magnetron sputtering systems (MSS) with different thermal ...

    • 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 ...

    • EVALUATION OF THE SURFACE SETTLEMENT ABOVE THE PRAGUE METRO LINE A EXTENSION CONSTRUCTED BY TWO SHIELDS 

      Autor: Hilar , Matous; Tuan The, Nhu
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      The new section of the Prague metro V.A is located in the west part of Prague, between stations Dejvická and Motol Hospital. The new metro section is 6.2km long and has four new stations. Majority of the two running tunnels ...