Now showing items 1-20 of 624

    • HOMOGENIZATION OF TRANSPORT PROCESSES AND HYDRATION PHENOMENA IN FRESH CONCRETE 

      Author: Beneš , Michal; Štefan , Radek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The problem of hydration and transport processes in fresh concrete is strongly coupled and non- inear, and therefore, very difficult for a numerical modelling. Physically accurate results can be obtained using fine-scale ...
    • COMPLEXITY REDUCTION OF CYCLOSTATIONARY SENSING TECHNIQUE USING IMPROVED HYBRID SENSING METHOD 

      Author: Abdullah , Hikmat N.; Dawood , Zinah O.; Abdelkareem , Ammar E.; Abed , Hadeel S.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      In cognitive radio system, the spectrum sensing has a major challenge in needing a sensing method, which has a high detection capability with reduced complexity. In this paper, a low-cost hybrid spectrum sensing method ...
    • THE EFFECT OF THE FILLING RATIO ON THE OPERATING CHARACTERISTICS OF AN INDIRECT DRUM DRYER 

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

      Author: 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. ...
    • NEURINGERROSEINWEIG MODEL BASED LONGITUDINALLY ROUGH POROUS CIRCULAR STEPPED PLATES IN THE EXISTENCE OF COUPLE STRESS 

      Author: Vashi , Yoginibahen Devendrasinh; Patel , Rakesh Manilal; Deheri , Gunamani Biswanath
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      This study intents to scrutinize the impact of ferrofluid in the presence of couple stress for longitudinally rough porous circular stepped plates. The influence of longitudinal surface roughness is developed using the ...
    • INFLUENCE OF CHEMICAL POLYMER ADDITIVE ON THE PHYSICAL AND MECHANICAL PROPERTIES OF EXPANDED POLYSTYRENE CONCRETE 

      Author: Wasiu , John; Baba , Daoud Mohammad
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      This research investigated the effect of Renolith chemical polymer additive (RCPA) on the properties of expanded polystyrene (ESP) concrete. Renolith chemical additive is a polymer-based product in a liquid form made up ...
    • OPTIMIZATION OF COMPUTATIONAL BURDEN OF THE POINT INFORMATION GAIN 

      Author: Urban , Jan; Rychtáriková , Renata; Macháček , Petr; Štys , Dalibor; Urbanová , Pavla; Císař , Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      We developed a method of image preprocessing based on the information entropy, namely, on the information contribution made by each individual pixel to the whole image or to image’s part (i.e., a Point Information Gain; ...
    • TESTING THE SUITABILITY OF THE EXTRUDED POLYSTYRENE STYRODUR APPLICATION IN THE TRACK SUBSTRUCTURE 

      Author: 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 ...
    • OPTIMIZATION OF A SMALL SOLAR CHIMNEY 

      Author: Castro Silva , Janaina Oliveira; Maia , Cristiana Brasil
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      An optimization study to maximize the exergy efficiency of a small-scale solar chimney was carried out. Optimization variables include collector diameter (Dc), collector height (Hc), tower height (Ht), and tower diameter ...
    • DEFORMATION ANALYSIS OF LAYERED REINFORCED CONCRETE FOAM CONCRETE FLOOR SLABS 

      Author: Lytvyniak , Oksana
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      This article presents a theoretical study of a stress-strain state of layered reinforced concrete - foam concrete floor slabs (hereinafter called as the LRFCS), with the use of a deformation analysis. Compressive and tensile ...
    • ANALYSIS OF THE PROPERTIES OF AW2099 ALUMINIUMLITHIUM ALLOY WELDED BY LASER BEAM WITH AW5087 ALUMINIUMMAGNESIUM FILLER MATERIAL 

      Author: 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 ...
    • AN ANALYSIS OF THE LIQUID FILMS BREAKUP USING THE COMPUTER VISION TECHNIQUE 

      Author: Měšťanová , Lucie; Bartoš , Ondřej
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The aim of this paper is to introduce a novel approach for analysing the droplet formation in a transonic flow. The method suggested in this work is based on the combination of the measured data from the wind tunnel by an ...
    • New Method on the Evaluation of Detail Materials and Heat Flows for Single String Cement Clinker Plant 

      Author: Darmanto , Prihadi Setyo
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      Material flow in each main equipment of a cement clinker plant, which is very useful for controlling the process, is impossible to be measured during operation due to very high temperatures. This paper intends to overcome ...
    • DESIGN OPTIMIZATION OF MOVEABLE MOMENT STABILIZATION SYSTEM FOR ACCESS CRANE PLATFORMS 

      Author: Ermis , Kemal; Caliskan , Mehmet; Tanriverdi , Muammer
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The popularity of aerial work platforms is rapidly increasing in the mechanization industry. As a result, the safety and structural strength of aerial work platforms should be prioritized.In this study, the mathematical ...
    • Evaluation of reflectance for building materials classification with terrestrial laser scanner radiation 

      Author: Costantino , Domenica; Pepe , Massimiliano; Angelini , Maria Giuseppa
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The main purpose of this work is the evaluation of the potential of Terrestrial Laser Scanning (TLS) technology to perform a reflectance analysis of scanned objects. A laser beam, having a coherent beam in the field of ...
    • Design Optimization of a Bucket Elevator 

      Author: Yin , Edward
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      A failure of conveyor chain links in a production process can cause unscheduled shutdowns, which increase the throughput time coupled with damaged buckets and chain links, which increase maintenance and repair costs. Since ...
    • ON THE THREEDIMENSIONAL PAULI EQUATION IN NONCOMMUTATIVE PHASESPACE 

      Author: Haouam , Ilyas
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      In this paper, we obtained the three-dimensional Pauli equation for a spin-1/2 particle in the presence of an electromagnetic field in a noncommutative phase-space as well as the corresponding deformed continuity equation, ...
    • Application of global optimization to determine strains in RC compressed members 

      Author: Lechman , Marek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      In this paper, the results of an application of global and local optimization methods to solve a problem of determination of strains in RC compressed structure members are presented. Solutions of appropriate sets of nonlinear ...
    • 

      Author: Unknown author
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The aim of this study is to theoretically investigate the effects of design parameters on the static equivalent stress of radial rolling bearings, such as the point contact case for ball bearings and line contact case for ...
    • ANALYSIS OF STATIC ANGLE OF REPOSE WITH RESPECT TO POWDER MATERIAL PROPERTIES 

      Author: Macho , Oliver; Demková , Karin; Gabrišová , Ľudmila; Čierny , Matúš; Mužíková , Jitka; Galbavá , Paulína; Nižnanská , Žofia; Blaško , Jaroslav; Peciar , Peter; Fekete , Roman; Peciar , Marián
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      This paper investigates the Angle of Repose (AoR) of powder materials with respect to their morphological and rheological properties. Glass beads, sand, flour and semolina of different particle sizes were used as the ...