Prohlížení Acta Polytechnica dle názvu

Zobrazují se záznamy 481-500 z 880

    • Measurement of solid particle emissions from oxy-fuel combustion of biomass in fluidized bed 

      Autor: Červený, Ondřej; Vybíral, Pavel; Hemerka, Jiří; Mareš, Luďek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      The presented work summarizes the results of the measurement of solid particle emissions from an experimental 30 kW combustion unit. This unit has been used for the research of oxy-fuel combustion of biomass in a fluidized ...

    • MEASUREMENTS ON THE VT 400 AIR TURBINE 

      Autor: Klimko , Marek; Okresa , Daniel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      This paper presents a basic description of measurements on the experimental air turbine located in the laboratories of the Department of Power System Engineering (KKE). The research on this turbine focuses on the flow in ...

    • MEASURING SUPERMASSIVE BLACK HOLE SPINS IN AGN 

      Autor: Brenneman, Laura
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Measuring the spins of supermassive black holes (SMBHs) in active galactic nuclei (AGN) can inform us about the relative role of gas accretion vs. mergers in recent epochs of the life of the host galaxy and its AGN. Recent ...

    • Mechanical and physical properties of cement mixtures for 3D processing 

      Autor: Litoš, Jiří; Šána, Vladimír; Uhlík, Adam; Kolář, Karel; Nguyen, Markéta
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      In this paper, information about cementitious composite materials for further 3D processing is discussed and supplemented. Many of the research in this area focuses primarily on cement composites suitable for 3D printing. ...

    • MECHANICAL DISINTEGRATION OF WHEAT STRAW BY ROLLER-PLATE GRIND SYSTEM WITH SHARP-EDGED SEGMENTS 

      Autor: Kratky , Lukas; Jirout , Tomáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Colloid mills and extruders are widely used for disintegrating wet fibrous biomass. However, their main disadvantages are a high energy requirement in the range of hundreds or thousands of kWh per ton of material, and the ...

    • MECHANICAL PROPERTIES OF PVA NANOFIBER TEXTILES WITH INCORPORATED NANODIAMONDS, COPPER AND SILVER IONS 

      Autor: Indrová , Kateřina; Prošek , Zdeněk; Topič , Jaroslav; Ryparová , Pavla; Nežerka , Václav; Tesárek , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      The unique properties of nanotextiles based on poly(vinyl-alcohol) (PVA) manufactured using electrospinning method have been known and exploited for many years. Recently, the enrichment of nanofiber textiles with nanoparticles, ...

    • MECHANICAL PROPERTIES OF RAMMED EARTH WITH RESPECT TO CLAY MIXTURE COMPOSITION 

      Autor: Plaček Otcovská, Tereza; Mužíková, Barbora; Padevět, Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Unfired earth is a traditional building material, but it is less used than other building materials, such as concrete or steel. But the use of unfired earth is experiencing a renaissance. ammed earth is a type of unfired ...

    • Metallurgical Joining of Magnesium Alloys by the FSW Process 

      Autor: Kupec , Tomáš; Hlavačová , Ivana; Turňa , Milan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper deals with welding AZ 31Mg alloy by FSW (Friction Stir Welding) technology. Welds were fabricated with new equipment supplied from China for VUZ-PI Bratislava (Welding Research Institute — Industrial Institute). ...

    • METALS IN THE ICM: WITNESSES OF CLUSTER FORMATION AND EVOLUTION 

      Autor: Lovisari, Lorenzo; Laganá, Tatiana F.; Borm, Katharina; Schellenberger, Gerrit; Reiprich, Thomas H.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The baryonic composition of galaxy clusters and groups is dominated by a hot, X-ray emitting Intra-Cluster Medium (ICM). The mean metallicity of the ICM has been found to be roughly 0.3 ÷ 0.5 times the solar value, therefore ...

    • Micromechanical Analysis of Cement Paste with Carbon Nanotubes 

      Autor: Šmilauer , Vít; Hlaváček , Petr; Padevět , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      Carbon nanotubes (CNT) are an attractive reinforcement material for several composites, due to their inherently high strength and high modulus of elasticity. There are controversial results for cement paste with admixed ...

    • MICROSTRUCTURAL CHARACTERISTICS, MECHANICAL AND WEAR BEHAVIOUR OF ALUMINIUM-ALLOYED DUCTILE IRONS SUBJECTED TO TWO AUSTEMPERING PROCESSES 

      Autor: Adebayo , Abdullahi Olawale; Oyetunji , Akinlabi; Alaneme , Kenneth Kenayo
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The effect of aluminium addition and austempering processes on the microstructures, mechanical and wear properties of rotary melting furnace processed ductile irons was investigated. Ductile irons containing 1−4 wt.% Al ...

    • MICROSTRUCTURE DESCRIPTION AND MICROMECHANICAL PROPERTIES OF SPRUCE WOOD 

      Autor: Prošek , Zdeněk; Králík , Vlastimil; Topič , Jaroslav; Nežerka , Václav; Indrová , Kateřina; Tesárek , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      The knowledge about the microstructure and morphology of individual phases also allows an artificial modification of the material, or its processing, to produce engineered products with required properties. The purpose of ...

    • MINIMAL NON-INTEGER ALPHABETS ALLOWING PARALLEL ADDITION 

      Autor: Legerský , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      Parallel addition, i.e., addition with limited carry propagation has been so far studied for complex bases and integer alphabets. We focus on alphabets consisting of integer combinations of powers of the base. We give ...

    • MINIMIZATION OF TOXIC EMISSIONS DURING BURNING LOW-GRADE FUEL AT KAZAKHSTAN THERMAL POWER PLANT 

      Autor: Askarova , Aliya; Šafařík , Pavel; Nugymanova , Aizhan; Bolegenova , Saltanat; Maximov , Valeriy; Bolegenova , Symbat
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      This paper presents new results of computational experiments on the implementation of Overfire Air (OFA) technologies using an example of a combustion chamber of the BKZ-75 boiler of the Shakhtinskaya power plant (Shakhtinsk, ...

    • Model of Customer Buying Behavior in the CZ Mobile Telecommunication Market 

      Autor: Grünwald , Ondrej
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      The Czech mobile telecommunication market constitutes an oligopoly of three operators, who have built a privileged position and effectively crush any competition. The entry of a new operator has been considered by the ...

    • MODEL OF HEAT SIMULATOR FOR DATA CENTERS 

      Autor: Novotný, Jan; Nožička, Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      The aim of this paper is to present a design and a development of a heat simulator, which will be used for a flow research in data centers. The designed heat simulator is based on an ideological basis of four-processor 1U ...

    • MODEL REFERENCE ADAPTIVE CONTROL-BASED GENETIC ALGORITHM DESIGN FOR HEADING SHIP MOTION 

      Autor: Al-Awad , Nasir Ahmad
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      In this paper, the heading control of a large ship is enhanced with a specific end goal, to check the unwanted impact of the waves on the actuator framework. The Nomoto model is investigated to describe the ship’s guiding ...

    • MODEL-BASED SECURITY ANALYSIS OF FPGA DESIGNS THROUGH REINFORCEMENT LEARNING 

      Autor: Vetter , Michael
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Finding potential security weaknesses in any complex IT system is an important and often challenging task best started in the early stages of the development process. We present a method that transforms this task for FPGA ...

    • MODELING JET INTERACTIONS WITH THE AMBIENT MEDIUM 

      Autor: Beall, J. H.; Guillory, J.; Rose, D. V.; Wolff, Michael T.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Recent high-resolution (see, e.g., [13]) observations of astrophysical jets reveal complex structures apparently caused by ejecta from the central engine as the ejecta interact with the surrounding interstellar material. ...

    • Modeling of Concrete Creep Based on Microprestress-solidification Theory 

      Autor: Havlásek , P.; Jirásek , M.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      Creep of concrete is strongly affected by the evolution of pore humidity and temperature, which in turn depend on the environmental conditions and on the size and shape of the concrete member. Current codes of practice ...