Prohlížení Acta Polytechnica dle názvu

Zobrazují se záznamy 501-520 z 880

    • MODELING OF FLOWS THROUGH A CHANNEL BY THE NAVIER–STOKES VARIATIONAL INEQUALITIES 

      Autor: Kračmar, Stanislav; Neustupa, Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      We deal with a mathematical model of a flow of an incompressible Newtonian fluid through a channel with an artificial boundary condition on the outflow. We explain how several artificial boundary conditions formally follow ...

    • 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 ...

    • MODELLING SIMULATION AND PARAMETER IDENTIFICATION OF ACTIVE POLLUTION REDUCTION WITH PHOTOCATALYTIC ASPHALT 

      Autor: Kruschwitz , Jens; Lind , Martin; Muntean , Adrian; Richardson , Omar; Wondmagegne , Yosief
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      We develop and implement a numerical model to simulate the effect of photocatalytic asphalt on reducing the concentration of nitrogen monoxide (NO) due to the presence of heavy traffic in an urban environment. The contributions ...

    • MODERNIZATION FEATURES OF A VACUUM INSTALLATION BASED ON LOW-PRESSURE ARC DISCHARGE FOR COMPOSITE TIN-CU LAYERS FORMATION 

      Autor: Tsyrenov , Dmitriy; Semenov , Aleksandr; Smirnyagina , Natalia
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      A hybrid technology for forming composite TiN-Cu layers under the combined influence of a magnetron and low pressure arc discharges has been designed. The parameters of the plasma generator have been studied. The technological ...

    • Modification of Composite Material Fillers by Atmospheric Plasma Discharge 

      Autor: Tichy , David; Hajkova , Pavlina
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      This work is focused on the observation of the influence of cold atmospheric dielectric barrier discharge (DBD) on a modification of textile samples. The main objective of the experiment is to research wettability change ...

    • MODIFICATION OF HIERARCHICAL AGGLOMERATIVE CLUSTERING WITH COMPLETE LINKAGE FOR OPTIMAL USAGE WITH PASSIVE OPTICAL NETWORKS 

      Autor: Pehnelt , Tomáš; Lafata , Pavel; Nevosad , Marek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      Today, passive optical networks (PONs) represent a modern solution for high-speed FTTx subscriber lines and networks. Due to the fact that optical fibres and cables are deployed in last-mile network segments. Unfortunately, ...

    • MODIFICATION OF POWDER MATERIAL BY COMPACTION PROCESSING 

      Autor: Peciar , Peter; Macho , Oliver; Eckert , Maroš; Kabát , Juraj; Gabrišová , Ľudmila; Kotora , Peter; Fekete , Roman; Peciar , Marián
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      There are different criteria for assessing the appropriateness of an agglomeration technology in the deployment processing of dry, fine and dirty dust burdening in the communal and working environment. Besides the benefit ...

    • MODIFIED EQUATION FOR A CLASS OF EXPLICIT AND IMPLICIT SCHEMES SOLVING ONE-DIMENSIONAL ADVECTION PROBLEM 

      Autor: Bodnár, Tomáš; Fraunié, Philippe; Kozel, Karel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      This paper presents the general modified equation for a family of finite-difference schemes solving one-dimensional advection equation. The whole family of explicit and implicit schemes working at two time-levels and having ...

    • Modified Korteweg-de Vries equation as a system with benign ghosts 

      Autor: Smilga, Andrei
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      We consider the modified Korteweg-de Vries equation, uxxx + 6u2ux + ut = 0, and explore its dynamics in spatial direction. Higher x derivatives bring about the ghosts. We argue that these ghosts are benign, i.e., the ...

    • MODIFIED POSSIBILISTIC FUZZY C-MEANS ALGORITHM FOR CLUSTERING INCOMPLETE DATA SETS 

      Autor: Rustam; Usman, Koredianto; Kamaruddin, Mudyawati; Chamidah, Dina; Nopendri; Saleh, Khaerudin; Eliskar, Yulinda; Marzuki, Ismail
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      A possibilistic fuzzy c-means (PFCM) algorithm is a reliable algorithm proposed to deal with the weaknesses associated with handling noise sensitivity and coincidence clusters in fuzzy c-means (FCM) and possibilistic c-means ...

    • Modularity of Pressing Tools for Screw Press Producing Solid Biofuels 

      Autor: Matúš , Miloš; Križan , Peter
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper focuses on the development of the newly-patented structure of a screw briquetting machine for compacting biomass into a solid biofuel. The design of the machine is based on the results of a comprehensive study ...

    • Monitoring the internal structure behaviour of alkali-activated slag paste: effect of the curing mode 

      Autor: Nápravník, Petr; Kocáb, Dalibor; Bílek, Jr., Vlastimil; Lisztwan, Dominik; Kucharczyková, Barbara
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      This paper deals with the monitoring of the internal structure behaviour of an alkaliactivated slag (AAS) paste. The slag was activated with a 4M solution of sodium hydroxide. The behaviour of the internal structure of the ...

    • MOONLIGHT: A NEW LUNAR LASER RANGING RETROREFLECTOR AND THE LUNAR GEODETIC PRECESSION 

      Autor: Martini, M.; Dell’Agnello, S.; Currie, D.; Delle Monache, G. O.; Vittori, R.; Berardi, S.; Boni, A.; Cantone, C.; Ciocci, E.; Lops, C.; Garattini, M.; Maiello, M.; Patrizi, G.; Tibuzzi, M.; Intaglietta, N.; Chandler, J.; Bianco, G.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Since the 1970s Lunar Laser Ranging (LLR) to the Apollo Cube Corner Retroreflector (CCR) arrays (developed by the University of Maryland, UMD) supplied almost all significant tests of General Relativity (Alley et al., 1970; ...

    • MOONLIGHT: A NEW LUNAR LASER RANGING RETROREFLECTOR INSTRUMENT 

      Autor: Garattini, M.; Dell’Agnello, S.; Currie, D.; Delle Monache, G. O.; Tibuzzi, M.; Patrizi, G.; Berardi, S.; Boni, A.; Cantone, C.; Itaglietta, N.; Lops, C.; Maiello, M.; Martini, M.; Vittori, R.; Bianco, G.; March, R.; Bellettini, G.; Tauraso, R.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Since 1969 Lunar Laser Ranging (LLR) to the Apollo Cube Corner Reflector (CCR) arrays has supplied several significant tests of gravity: Geodetic Precession, the Strong and Weak Equivalence Principle (SEP, WEP), the ...

    • MULTIDIMENSIONAL HYBRID BOUNDARY VALUE PROBLEM 

      Autor: Szajewska , Marzena; Tereszkiewicz Maria, Agnieszka
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The purpose of this paper is to discuss three types of boundary conditions for few families of special functions orthogonal on the fundamental region. Boundary value problems are considered on a simplex F in the real ...

    • Multidimensional mobile mapping and integrated approach for the digitalisation of underground transport infrastructure 

      Autor: Foria, Federico; Calicchio, Mario; Moretti, Laura; Loprencipe, Giuseppe
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      The tunnel industry has started focusing on the maintenance and management challenges of an existing infrastructure. It is an urgent matter in industrialised countries, where the stakeholders’ attention is increasing at a ...

    • Multigroup Approximation of Radiation Transfer in SF6 Arc Plasmas 

      Autor: Bartlova , Milada; Aubrecht , Vladimir; Bogatyreva , Nadezhda; Holcman , Vladimir
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The first order of the method of spherical harmonics (P1-approximation) has been used to evaluate the radiation properties of arc plasmas of various mixtures of SF6 and PTFE ((C2F4)n, polytetrafluoroethylene) in the ...

    • MULTILAYER COATINGS Ti/TiN Cr/CrN AND W/WN DEPOSITED BY MAGNETRON SPUTTERING FOR IMPROVEMENT OF ADHESION TO BASE MATERIALS 

      Autor: Horník , Jakub; Krum , Stanislav; Tondl , David; Puchnin , Maxim; Sachr , Pavel; Cvrček , Ladislav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      The paper deals with evaluation of single and multilayer layer PVD coatings based on Cr and Ti widely used in tool application. Additionally, W and WN based coating which are not so widespread were designed and deposited ...

    • MULTIROBOT MOTION PLANNING: A MODIFIED RECEDING HORIZON APPROACH FOR REACHING GOAL STATES 

      Autor: Mendes Filho M., José; Lucet , Eric
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      This paper proposes the real-time implementation of an algorithm for collision-free motion planning based on a receding horizon approach, for the navigation of a team of mobile robots in presence of obstacles of different ...

    • MULTIVARIATE INTERPOLATION USING POLYHARMONIC SPLINES 

      Autor: Segeth, Karel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      Data measuring and further processing is the fundamental activity in all branches of science and technology. Data interpolation has been an important part of computational mathematics for a long time. In the paper, we are ...