Prohlížení Acta Polytechnica. 2019, vol. 59 dle názvu

Zobrazují se záznamy 1-20 z 60

    • 3-D MODELING OF HEAT AND MASS TRANSFER PROCESS DURING THE COMBUSTION OF SOLID FUEL IN A SWIRL FURNACE 

      Autor: Askarova , Aliya; Bolegenova , Saltanat; Maximov , Valeriy; Bolegenova , Symbat; Nugymanova , Aizhan; Šafařík , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      In this work, a comprehensive study of thermal processes and aerodynamic and concentration characteristics of the combustion chamber of the boiler BKZ-75 of the Shakhtinskaya thermal power plant (Kazakhstan) are presented. ...

    • 3D DIGITAL RECONSTRUCTION BASED ON ARCHIVED TERRESTRIAL PHOTOGRAPHS FROM METRIC CAMERAS 

      Autor: Poloprutský, Zdeněk; Fraštia, Marek; Marčiš, Marián
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The paper deals with the possibilities and limitations of the image processing of digitalized terrestrial photographs from analogue metric cameras. By the end of the 20th century, analogue metric cameras such as Zeiss UMK ...

    • A COMPARATIVE STUDY OF DATA-DRIVEN MODELING METHODS FOR SOFT-SENSING IN UNDERGROUND COAL GASIFICATION 

      Autor: Kačur, Ján; Durdán, Milan; Laciak, Marek; Flegner, Patrik
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Underground coal gasification (UCG) is a technological process, which converts solid coal into a gas in the underground, using injected gasification agents. In the UCG process, a lot of process variables can be measurable ...

    • A MULTIPHASE FLOW LOOP DESIGN FOR INVESTIGATING THE PARTIAL PHASE SEPARATION IN A PIPE TEE 

      Autor: Saieed, Ahmed; Memon, Zeeshan Qadir; Tran, Minh Cong; King Soon, William Pao
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This article presents a design and commissioning of a multiphase flow loop, which was developed for scrutinizing the partial phase separation characteristics of pipe Tees. Its length is 9m and its primary diameter is 0.078m ...

    • A NEW AND ADAPTIVE SECURITY MODEL FOR PUBLIC COMMUNICATION BASED ON CORRELATION OF DATA FRAMES 

      Autor: Haider Tarish, Haider; Muhsen Halboot, Dhiaa; Shahadib Ismael, Haider; See Hang, Ong
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Recent developments in communication and information technologies, plus the emerging of the Internet of Things (IoT) and machine to machine (M2M) principles, create the need to protect data from multiple types of attacks. ...

    • A NOVEL PROJECTION ALGORITHM FOR PRODUCTION LAYOUT EXTRACTION FROM POINT CLOUDS 

      Autor: Bureš , Marek; Martirosov , Sergo; Polcar , Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The paper is focused on point cloud data processing obtained by 3D laser scanning. The scanning devices are at a very advanced level and after reaching their possible maximum scanning speeds, manufacturers are now more ...

    • A STUDY OF FERROFLUID LUBRICATION BASED ROUGH SINE FILM SLIDER BEARING WITH ASSORTED POROUS STRUCTURE 

      Autor: Munshi M., Mohmmadraiyan; Patel R., Ashok; Deheri B., Gunamani
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This paper attempts to study a ferrofluid lubrication based rough sine film slider bearing with assorted porous structure using a numerical approach. The fluid flow of the system is regulated by the Neuringer-Rosensweig ...

    • ADSORPTION OF CATIONIC DYE FROM AQUEOUS SOLUTION USING COMPOSITE CHICKEN EGGSHELL - ANTHILL CLAY: OPTIMIZATION OF ADSORBENT PREPARATION CONDITIONS 

      Autor: Yusuff Sikiru, Adeyinka
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      A composite adsorbent was prepared from anthill and eggshell mixture, using an incipient wetness impregnation method and it was used for an adsorption of cationic dye (methylene blue, MB) from an aqueous solution. The ...

    • AN ANALYSIS OF SPATIAL STRUCTURE OF URBAN REGIONAL NETWORKS USING GIS 

      Autor: Kostin , Vitalii; Halounová , Lena
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Road network is the foundation of the urbanization process. Initially, it represented an indispensable part not only for the very existence of cities but also for their further economic and social development. Gradually ...

    • ANALYSIS OF THE PROPERTIES OF AW2099 ALUMINIUM-LITHIUM ALLOY WELDED BY LASER BEAM WITH AW5087 ALUMINIUM-MAGNESIUM FILLER MATERIAL 

      Autor: Sahul , Miroslav; Sahul , Martin; Pašák , Matej; Marônek , Milan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      EN AW2099 aluminium lithium alloy, 2.0mm in thickness, was used as an experimental material. EN AW2099 belongs to the 3rd generation of aluminium lithium alloys. The third generation was developed to improve the disadvantages ...

    • APPLICABILITY VERIFICATION OF AUTOFORM SOFTWARE FOR FEM SIMULATION OF MECHANICAL FIXATION OF HEMMED JOINTS 

      Autor: Chrášťanský , Lukáš; Šanovec , Jan; Martawirya , Yatna Yuwana; Valeš , Michal
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This paper deals with the problematics of fixation of hemmed joints, especially with one specific mechanical method how to ensure a dimensional stability of a hemmed joint of car-body parts, such as doors, bonnet and trunk ...

    • AUTOMATIC EEG CLASSIFICATION USING DENSITY BASED ALGORITHMS DBSCAN AND DENCLUE 

      Autor: Piorecký , Marek; Štrobl , Jan; Krajča , Vladimír
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Electroencephalograph (EEG) is a commonly used method in neurological practice. Automatic classifiers (algorithms) highlight signal sections with interesting activity and assist an expert with record scoring. Algorithm ...

    • AUTOMATIC RECONSTRUCTION OF ROOF MODELS FROM BUILDING OUTLINES AND AERIAL IMAGE DATA 

      Autor: Hron , Vojtěch; Halounová , Lena
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The knowledge of roof shapes is essential for the creation of 3D building models. Many experts and researchers use 3D building models for specialized tasks, such as creating noise maps, estimating the solar potential of ...

    • COMMON CROSSING CONDITION MONITORING WITH ON BOARD INERTIAL MEASUREMENTS 

      Autor: Sysyn, Mykola; Nabochenko, Olga; Gerber, Ulf; Kovalchuk, Vitalii; Petrenko, Oleksiy
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      A railway turnout is an element of the railway infrastructure that influences the reliability of a railway traffic operation the most. The growing necessity for the reliability and availability in the railway transportation ...

    • COMPARATIVE STUDY AND EMPIRICAL MODELLING OF PULVERIZED COCONUT SHELL, PERIWINKLE SHELL AND PALM KERNEL SHELL AS A POZZOLANS IN CONCRETE 

      Autor: Ikponmwosa , Efe Ewaen; Ehikhuenmen , Samuel Onosedeba; Irene , Karieren Kate
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Infrastructural development across the world is fast growing due to the rapid growth in population. This has resulted in consequently creating an increase in the demand for construction materials, especially cement. This ...

    • 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 ...

    • 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 ...

    • CYLINDRICAL ROLLER BEARING LUBRICATION REGIMES ANALYSIS AT LOW SPEED AND PURE RADIAL LOAD 

      Autor: Chmelař , Jakub; Petr , Karel; Mikeš , Petr; Dynybyl , Vojtěch
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      In this article, we describe a method of the roller bearing lubrication regime prediction. It uses a mathematical model of the bearing based on the standard ISO/TS 16281 to obtain the external load distribution over the ...

    • CZECH WW2 CONCRETE FORTIFICATIONS: CORROSION PROCESSES AND REMEDIATION METHOD BASED ON CRYSTALLIZING COATING 

      Autor: Pazderka, Jiří; Reiterman, Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Concrete is a relatively new structural material, hence the remediation of concrete structures is very rare. There are a lot of concrete fortifications in the Czech Republic, which were built just before WW2. These bunkers ...

    • DEFLECTIONS AND FREQUENCY ANALYSIS IN THE MILLING OF THIN-WALLED PARTS WITH VARIABLE LOW STIFFNESS 

      Autor: Kononenko , Serhii; Dobrotvorskiy , Sergey; Basova , Yevheniia; Gasanov , Magomediemin; Dobrovolska , Ludmila
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The disadvantage of the geometry of thin-walled parts, in terms of processing, is the low ability to resist static and dynamic loads. It is caused by the elastic deformation of elements with a low stiffness. Modelling ...