Prohlížení Acta Polytechnica. 2020, vol. 60 dle názvu

Zobrazují se záznamy 38-57 z 58

    • PARALLELIZATION OF ASSEMBLY OPERATION IN FINITE ELEMENT METHOD 

      Autor: Bošanský , Michal; Patzák , Bořek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The efficient codes can take an advantage of multiple threads and/or processing nodes to partition a work that can be processed concurrently. This can reduce the overall run-time or make the solution of a large problem ...

    • PERFORMANCE ANALYSIS OF QUADRATURE CHAOS SHIFT 

      Autor: Alabbasi , Hesham Adnan; Abboud , Izz Kadhum; Hasan , Fadhil Sahib
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      One of the most famous techniques of non-coherent differential chaos shift keying (DCSK) is Quadrature chaos shift keying (QCSK) system, this system suffered from lowering the data rate and increasing the bit energy during ...

    • PILE SETTLEMENT INDUCED FROM SOIL MOVEMENT DUE TO BREAKDOWN OF RETAINING WALL 

      Autor: Shukla , Rajesh Prasad
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      Very few studies measured the settlement of retaining wall supported piles foundation under a soil movement. This study explores the pile settlement induced from the sudden breakdown of a closely located retaining wall ...

    • PROPERTIES OF A DIFFERENTIAL SEQUENCE BASED UPON THE KUMMER-SCHWARZ EQUATION 

      Autor: Maharaj , Adhir; Andriopoulos , Kostis; Leach , Peter
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      In this paper, we determine a recursion operator for the Kummer-Schwarz equation, which leads to a sequence with unacceptable singularity properties. A different sequence is devised based upon the relationship between the ...

    • SENSITIVITY ANALYSIS OF INPUT PARAMETERS FOR LOAD CARRYING CAPACITY OF MASONRY ARCH BRIDGES 

      Autor: Vokál , Marek; Drahorád , Michal
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The article deals with an analysis of railway masonry arch bridges. Typical attributes of these bridges are pointing loss and backfill. Therefore, the material - masonry - behaviour can be described only by a non-linear ...

    • SHRINKAGE OF VARIOUS TYPES OF PORTLAND CLINKER-BASED CEMENTS WITH RESPECT TO THEIR HYDRATION DEGREE 

      Autor: Davidová , Vendula; Reiterman , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The volume changes of cement based composites are significantly exhibited in the hardening process. Initial phases of the hardening are complemented by the expansion due to the heat evolution that is subsequently alternated ...

    • SIMILARITY SOLUTIONS AND CONSERVATION LAWS FOR THE BEAM EQUATIONS: A COMPLETE STUDY 

      Autor: Halder , Amlan Kanti; Paliathanasis , Andronikos; Leach , Peter Gavin Lawrence
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      We study the similarity solutions and we determine the conservation laws of various forms of beam equations, such as Euler-Bernoulli, Rayleigh and Timoshenko-Prescott. The travelling-wave reduction leads to solvable ...

    • STRUCTURE FROM MOTION PROCESSING OF ANALOGUE IMAGES CAPTURED BY ROLLEI METRIC CAMERA, DIGITIZED WITH VARIOUS SCANNING RESOLUTION 

      Autor: Dlesk , Adam; Vach , Karel; Pavelka , Karel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      SfM processing of archived analogue images gives an opportunity to efficiently create new and valuable 2D and 3D results. The SfM processing of digitized analogue images brings some challenges. How to digitize negatives ...

    • STUDY ON MCNP6 MODEL IN THE CALCULATION OF KINETIC PARAMETERS FOR PEBBLE BED REACTOR 

      Autor: Zuhair,; Suwoto,; Setiadipura, Topan; Su'ud, Zaki
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      When conducting a nuclear reactor transient analysis, the most important parameter, called the kinetic parameter, is required. The calculation of kinetic parameters can be conducted using several methods. The deterministic ...

    • SUITABLE PRODUCTION TOOLS SELECTION WITH THE USE OF EVOLUTIONARY ALGORITHMS 

      Autor: Hynek , Petr; Kreibich , Viktor; Firt , Roman
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      This paper deals with the use of a production equipment simulation in the design of production systems, more specifically the welding equipment in the automotive industry. Based on the simulation results, a matrix, which ...

    • TESTING OF GLUED JOINTS ON PLASTIC PARTS MANUFACTURED USING FFF TECHNOLOGY 

      Autor: Suder , Jiří; Vocetka , Michal; Kot , Tomáš; Fojtík , František; Fusek , Martin
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The article focuses on the testing of glued joints of plastic parts manufactured by 3D rapid prototyping, using the Fused Filament Fabrication technology. The first part of the article describes the suitability of using a ...

    • TESTING THE SUITABILITY OF THE EXTRUDED POLYSTYRENE (STYRODUR) APPLICATION IN THE TRACK SUBSTRUCTURE 

      Autor: Ižvolt , Libor; Dobeš , Peter; Mečár , Martin
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      Extruded polystyrene (XPS) and its excellent thermal insulation properties have been known for over 60 years. Due to its thermal, mechanical, but also deformation properties, XPS has a universal application, not only in ...

    • THE CONDENSATION OF WATER VAPOUR IN A MIXTURE CONTAINING A HIGH CONCENTRATION OF NON-CONDENSABLE GAS IN A VERTICAL TUBE 

      Autor: Havlík , Jan; Dlouhý , Tomáš; Krempaský , Jakub
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      This paper deals with the condensation of water vapour possessing a content of noncondensable gas in vertical tubes. The condensation of pure steam on a vertical surface is introduced by the Nusselt condensation model. ...

    • THE DEVELOPMENT OF A NEW ADSORPTION-DESORPTION DEVICE 

      Autor: Gabrišová , Ľudmila; Peciar , Peter; Macho , Oliver; Juriga , Martin; Galbavá , Paulína; Nižnanská , Žofia; Kubinec , Róbert; Valent , Ivan; Peciar , Marián
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The aim of this work was to construct a new adsorption-desorption device based on the principle of separation of volatile organic compounds, e.g., ethanol. As an adsorbent, it is possible to use granulated activated carbon ...

    • THE EFFECT OF THE FILLING RATIO ON THE OPERATING CHARACTERISTICS OF AN INDIRECT DRUM DRYER 

      Autor: Havlík , Jan; Dlouhý , Tomáš; Sabatini , Michel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      This article investigates the effect of the filling ratio of the indirect rotary dryers on their operating characteristics. For moist biomass drying before combustion, the use of indirect drum dryers heated by a low pressure ...

    • THE INFLUENCE OF FRICTION STIR WELDED PROCESS PARAMETERS OF AA2519-T62 ON JOINT QUALITY DEFINED BY NON-DESTRUCTIVE LASER AMPLIFIED ULTRASONIC METHOD AND BY MICROSTRUCTURE ANALYSIS 

      Autor: Kravcov , Alexander; Kosturek , Robert; Śnieżek , Lucjan; Kluczyński , Janusz; Franek , Ondřej; Morozov , Nikolaj; Maciejewski , Pawel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The presented research contains a description of a non-destructive laser ultrasound internal structure analysis of aluminium joints made by friction stir welding. In the research, four selected technological parameter ...

    • THE INFLUENCE OF THE FIBRES ARRANGEMENT ON HEAT TRANSFER AND PRESSURE DROP OF POLYMERIC HOLLOW FIBRE HEAT EXCHANGERS 

      Autor: Kůdelová , Tereza; Kroulíková , Tereza; Astrouski , Ilya; Raudenský , Miroslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      Polymeric hollow fibre heat exchangers are the new alternative to common metal heat exchangers. These heat exchangers provide advantages, such as low weight, corrosion resistance, easy shaping and machining. Moreover, they ...

    • THE USE OF THE TWO-HANDED COLLABORATIVE ROBOT IN NON-COLLABORATIVE APPLICATION 

      Autor: Vocetka , Michal; Suder , Jiří; Huczala , Daniel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The article deals with possibilities of using of a two-handed collaborative robot in automated production. The introductory part of this paper is about robot manufacturers’ proposed ways of use of collaborative robots and ...

    • USING TEXTILE ARAMID FABRICS TO INCREASE THE BALLISTIC RESISTANCE OF ULTRA-HIGH-PERFORMANCE STEEL-FIBRE REINFORCED CONCRETE 

      Autor: Mára , Michal; Sovják , Radoslav; Fornůsek , Jindřich
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      Thin plates made of Ultra-High-Performance Steel-Fibre-Reinforced Concrete (UHPSFRC) with textile Aramid fabrics were subjected to a projectile impact and its post-test damage was discussed. The damage degrees were the ...

    • USING THE AUTOMATIC VECTORISATION METHOD IN GENERATING THE VECTOR ALTIMETRY OF THE HISTORICAL VLTAVA RIVER VALLEY 

      Autor: Kratochvílová , Darina; Cajthaml , Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The article describes, in detail, the generation procedure of vector altimetry of an upper and middle course of the Vltava River historical valley. By the historical valley, the shape of the river valley before the ...