Prohlížení Acta Polytechnica dle názvu

Zobrazují se záznamy 316-335 z 880

    • EXPERIMENTAL METHOD ON INVESTIGATION OF FIBRE REINFORCED CONCRETE AT ELEVATED TEMPERATURES 

      Autor: Goremikins, Vadims; Blesak, Lukas; Novak, Josef; Wald, Frantisek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      Generally speaking, adding a certain amount of steel fibres to a concrete mixture improves its mechanical properties. Currently, a lack of information considering tensile and post cracking behaviour of FRC at elevated ...

    • Experimental study of the torsional effect for yarn break load test of polymeric multifilaments 

      Autor: da Cruz, Daniel Magalhães; Clain, Fernanda Mazuco; Guilherme, Carlos Eduardo Marcos
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      Polymeric multifilaments have gained a significant interest in recent decades. In the studies of mechanical characteristics, although there are different types of tests, such as rupture, abrasion, creep, impact and fatigue, ...

    • Experimental verification of the efficiency of selective non-catalytic reduction in a bubbling fluidized bed combustor 

      Autor: Michaliková, Kristýna; Hrdlička, Jan; Vodička, Matěj; Skopec, Pavel; Jeníková, Jitka; Pilař, Lukáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      Controlling nitrogen oxide (NOX) emissions is still a challenge as increasingly stringent emission limits are introduced. Strict regulations will lead to the need to introduce secondary measures even for boilers with ...

    • Experimental verification of the impact of the air staging on the NOx production and on the temperature profile in a BFB 

      Autor: Vodička, Matěj; Michaliková, Kristýna; Hrdlička, Jan; Skopec, Pavel; Jeníková, Jitka
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      The results of an experimental research on air staging in a bubbling fluidized bed (BFB) combustor are presented within this paper. Air staging is known as an effective primary measure to reduce NOX formation. However, in ...

    • EXPERIMENTAL VERIFICATION OF THE STRUCTURAL AND TECHNOLOGICAL PARAMETERS OF THE PKS 

      Autor: Onderová , Iveta; Kolláth , Ludovít; Ploskuňáková , Lucia
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      This paper presents the theoretical design for experimental verification of the structural and technological parameters of the Parallel Kinematic Structure. The experimental equipment was developed at the Faculty of ...

    • Explosion Cladding of Lead on Steel 

      Autor: Turňa , Milan; Ondruška , Jozef; Turňová , Zuzana
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This work deals with explosion cladding of lead on steel. The welded materials and the Semtex S type explosive are characterised. The preparation of the welded materials and the proposed welding assembly are described. The ...

    • EXTERNAL ROLLING OF A POLYGON ON CLOSED CURVILINEAR PROFILE 

      Autor: Kresan , Tetiana; Pylypaka , Serhii; Ruzhylo , Zynovii; Rogovskii , Ivan; Trokhaniak , Oleksandra
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The rolling of a flat figure in the form of an equilateral polygon on a curvilinear profile is considered. The profile is periodic. It is formed by a series connection of an arc of a symmetrical curve. The ends of the arc ...

    • EXTERNAL ROLLING OF A POLYGON ON CLOSED CURVILINEAR PROFILE 

      Autor: Pylypaka, Serhii F.; Klendii, Mykola B.; Trokhaniak, Viktor I.; Kresan, Tetiana A.; Hryshchenko, Iryna Y.; Pastushenko, Andrii S.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The design of a helical surface tillage tool made of a developable helicoid section has been calculated using the methods of analytical and differential geometry, the theory of surfaces, the systems of computer-generated ...

    • Extra control coefficient additive ECCA-PID for control optimization of electrical and mechanic system 

      Autor: Can, Erol
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      Proportional Integral Derivative (PID) controllers are frequently used control methods for mechanical and electrical systems. Controller values are chosen either by calculation or by experimentation to obtain a satisfactory ...

    • EXTRACTION AND EVALUATION OF OIL FROM GREEN ALGAE CLADOPHORA GLOMERATA BY HEXANE/ETHER MIXTURE 

      Autor: Yusuff , Adeyinka Sikiru; Ewere , Donatus
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The overall aim of this study was to grow green algae Cladophora glomerata, extract oil from it, and characterize the extracted oil to gain insight into its physicochemical properties. The effects of parameters affecting ...

    • EXTREMAL VECTORS FOR VERMA TYPE REPRESENTATION OF B2 

      Autor: Burdík , Čestmír; Navrátil , Ondřej
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Starting from the Verma modules of the algebra B2 we explicitly construct factor representations of the algebra B2 which are connected with the unitary representation of the group SO(3, 2). We find a full set of extremal ...

    • FABRICATION OF Mg-Zn-Al HYDROTALCITE AND ITS APPLICATION FOR Pb<sup>2+</sup> REMOVAL 

      Autor: Heraldy , Eddy; Rahmawati , Fitria; Ardiyanti , Dwi; Nurmawanti , Ika
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The fabrication of Mg-Zn-Al Hydrotalcite (HT) was carried out by the co-precipitation method at various molar ratios. The Mg-Zn-Al HT compound at the optimum molar ratio was then calcined to determine the effect of calcination ...

    • FACT — LONGTERM MONITORING OF BRIGHT TeV BLAZARS 

      Autor: Meier , Katja; Biland , A.; Bretz , T.; Buss , J.; Dorner , D.; Einecke , S.; Eisenacher , D.; Hildebrand , D.; Knoetig L., M.; Krähenbühl , T.; Lustermann , W.; Mannheim , K.; Neise , D.; Overkemping , A.-K.; Paravac , A.; Pauss , F.; Rhode , W.; Ribordy , M.; Steinbring , T.; Temme , F.; Thaele , J.; Vogler , P.; Walter , R.; Weitzel , Q.; Zänglein , M.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The First G-APD Cherenkov Telescope (FACT), located on the Canary Island of La Palma, has been taking data since October 2011. FACT has been optimized for longterm monitoring of bright TeV blazars, to study their variability ...

    • FACT — STATUS AND FIRST RESULTS 

      Autor: Dorner , Daniela; Biland , A.; Bretz , T.; Buss , J.; Einecke , S.; Eisenacher , D.; Hildebrand , D.; Knoetig L., M.; Krähenbühl , T.; Lustermann , W.; Mannheim , K.; Meier , K.; Neise , D.; Overkemping , A.-K.; Paravac , A.; Pauss , F.; Rhode , W.; Ribordy , M.; Steinbring , T.; Temme , F.; Thaele , J.; Vogler , P.; Walter , R.; Weitzel , Q.; Zänglein , M.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      FACT is the first imaging Cherenkov telescope based on a camera using solid state photosensors (Geigermode Avalanche Photodiodes G-APD aka SiPM). Since October 2011, it has been taking data regularly. Apart from commissioning ...

    • FACTOR AND PALINDROMIC COMPLEXITY OF THUE-MORSE’S AVATARS 

      Autor: Frougny , Christiane; Klouda , Karel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Two infinite words that are connected with some significant univoque numbers are studied. It is shown that their factor and palindromic complexities almost coincide with the factor and palindromic complexities of the famous ...

    • Fake face detection based on a multi discriminator deep CNN architecture (MDD-CNN) 

      Autor: Bencheriet, Chemesse Ennehar; Abdelmoumène, Hiba; Sebbagh, Abdennour; Yahiyaoui, Abdennour; Taba, Zahra
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      Due to the robustness of the deep learning tools used to design these applications, fakes are becoming increasingly common as these applications become more widely available and accessible to the general public. These fakes ...

    • FEATURES OF STRUCTURE FORMATION AND CHANGES IN THE MECHANICAL PROPERTIES OF CAST Al-Mg-Si-Mn ALLOY WITH THE ADDITION OF (Ti+Zr) 

      Autor: Trudonoshyn , Oleksandr; Puchnin , Maxim; Mykhalenkov , Kostiantyn
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      The as-cast and heat-treated structure of permanent mould castings of AlMg5Si2Mn alloys with different contents of Ti has been investigated by differential scanning calorimetry, hardness and microhardness measurements, ...

    • Femoral Test Bed for Impedance Controlled Surgical Instrumentation 

      Autor: Brendle , Christian; Niesche , Annegret; Korff , Alexander; Radermacher , Klaus; Leonhardt , Steffen
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      The risk for patients during the standard procedure of revision of cemented artificial hip joints is unsatisfactorily highdue to its high level of invasiveness and limited access to the operative field. To reduce this risk ...

    • Femtosecond laser processing of advanced technical materials 

      Autor: Primus, Tomáš; Novák, Martin; Zeman, Pavel; Holešovský, František
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      Ultra-short pulsed laser ablation may be used for high-precision machining with very low thermal influence on the processed materials. Due to this reason, lasers are increasingly used for processing of advanced materials, ...

    • FICTITIOUS DOMAIN METHOD FOR NUMERICAL SIMULATION OF INCOMPRESSIBLE VISCOUS FLOW AROUND RIGID BODIES 

      Autor: Beno , Matej; Patzák , Bořek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      This article describes the method of efficient simulation of the flow around potentially many rigid obstacles. The finite element implementation is based on the incompressible Navier-Stokes equations using structured, ...