Acta Polytechnica. 2020, vol. 60, no.5

 

Zobrazují se záznamy 1-10 z 10

    • ARTIFICIAL NEURAL NETWORK APPROACH FOR THE IDENTIFICATION OF CLOVE BUDS ORIGIN BASED ON METABOLITES COMPOSITION 

      Autor: Rustam; Gunawan, Agus Yodi; Kresnowati, Made Tri Ari Penia
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      This paper examines the use of an artificial neural network approach in identifying the origin of clove buds based on metabolites composition. Generally, large data sets are critical for an accurate identification. Machine ...

    • APPLICATION OF FMEA METHODOLOGY FOR CHECKING OF CONSTRUCTION’S PROJECT DOCUMENTATION AND DETERMINATION OF THE MOST RISK AREAS 

      Autor: Tuháček , Martin; Franek , Ondřej; Svoboda , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The article deals with an innovative method designed to check project documentation of buildings at the design stage, specifically exploring the possibility to implement FMEA and PDCA methodologies. Based on performed ...

    • A COMPARISON OF TWO MODAL ANALYSIS METHODS: AN IMPACT HAMMER VERSUS LASER VIBROMETRY 

      Autor: Krejčí , Jakub; Beneš , Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      This paper presents a comparative experimental-analytical study on the performance of Multi-Input Single-Output (MISO) and Single-Input Multi-Output (SIMO) techniques to identify the modal properties of a cantilever beam. ...

    • MODELING OF MATERIAL BALANCE FROM THE EXPERIMENTAL UCG 

      Autor: Durdán , Milan; Terpák , Ján; Kačur , Ján; Laciak , Marek; Flegner , Patrik
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The underground coal gasification is a continually evolving technology, which converts coal to calorific gas. There are many important parameters in this technology, which are difficult to measure. These parameters include ...

    • 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 ...

    • Additive Laser Barcode Printing on High Reflective Stainless Steel 

      Autor: Mihalev , Mihail Stoyanov; Hardalov , Chavdar Momchilov; Christov , Christo Georgiev; Rinke , Monika; Leiste , Harald; Schneider , Johannes
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      In this paper, the process of an additive laser marking on stainless steel parts for barcode printing is presented. It is based on the use of one transition metal oxide chemically-well bonded to the stainless steel substrate, ...

    • LASER ULTRASONIC MEASUREMENT OF MECHANICAL DECAY IN LIMESTONE CAUSED BY FREEZE-THAW CYCLES 

      Autor: Kravcov , Alexander; Franek , Ondřej; Morozov , Nikolaj; Kucewicz , Michał; Tomaszewski , Michał; Svoboda , Pavel; Baranowski , Paweł
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      In this article, an innovative new method of non-destructive testing for estimating the sensitivity of limestone is presented. An advantage of the laser ultrasonic structuroscopy method is the time and the quality, due to ...

    • COUPLED ELECTROMAGNETIC-THERMAL SIMULATION OF A POWER TRANSFORMER BY 3D FEM 

      Autor: Henriques , Henrique Oliveira; Vizeu , Carlos Eduardo; Souza , Paulo Cesar; Costa , Mauricio Caldora; Sotelo , Guilherme Gonçalves; Sousa , Jonaylton Moura; Fortes , Marcio Zamboti; Ferreira , Vitor Hugo
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      Power transformers are the most common equipment in an electric power system, which has been manufactured in the last decade. However, overheating can damage them, considerably reducing their operation lives, which may ...

    • DEVELOPMENT OF NUMERICAL MODELS FOR THE PREDICTION OF TEMPERATURE AND SURFACE ROUGHNESS DURING THE MACHINING OPERATION OF TITANIUM ALLOY (Ti6Al4V) 

      Autor: Daniyan , Ilesanmi; Tlhabadira , Isaac; Mpofu , Khumbulani; Adeodu , Adefemi
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      Temperature and surface roughness are important factors, which determine the degree of machinability and the performance of both the cutting tool and the work piece material. In this study, numerical models obtained from ...

    • 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 ...