Prohlížení Acta Polytechnica dle názvu

Zobrazují se záznamy 41-60 z 880

    • 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 ...

    • A Study of Parameters Setting of the STADZT 

      Autor: Turoň , Václav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper deals with the new time-frequency Short-Time Approximated Discrete Zolotarev Transform (STADZT), which is based on symmetrical Zolotarev polynomials. Due to the special properties of these polynomials, STADZT ...

    • A Study of the Properties of Electrical Insulation Oils and of the Components of Natural Oils 

      Autor: Spohner , Milan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper presents a study of the electrical and non-electrical properties of insulating oils. For the correct choice of an electrical insulation oil, it is necessary to know its density, dynamic viscosity, dielectric ...

    • A SUPERINTEGRABLE MODEL WITH REFLECTIONS ON S^3 AND THE RANK TWO BANNAI-ITO ALGEBRA 

      Autor: De Bie , Hendrik; Genest Xavier, Vincent; Lemay , Jean-Michel; Vinet , Luc
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      A quantum superintegrable model with reflections on the three-sphere is presented. Its symmetry algebra is identified with the rank-two Bannai-Ito algebra. It is shown that the Hamiltonian of the system can be constructed ...

    • A SYSTEM AND A DEVICE FOR ISOLATING CIRCULATING TUMOR CELLS FROM THE PERIPHERAL BLOOD IN VIVO 

      Autor: Mego , Michal; Kocifaj , Miroslav; Kundracik , František
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Circulating tumor cells (CTC) play a crucial role in disseminating tumors and in the metastatic cascade. CTCs are found only in small numbers, and the limited amount of isolated CTCs makes it impossible to characterize ...

    • A Task-driven Grammar Refactoring Algorithm 

      Autor: Halupka , Ivan; Kollár , Ján; Pietriková , Emília
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper presents our proposal and the implementation of an algorithm for automated refactoring of context-free grammars. Rather than operating under some domain-specific task, in our approach refactoring is perfomed on ...

    • A Thermogravimetric Study of the Behaviour of Biomass Blends During Combustion 

      Autor: Jiříček , Ivo; Rudasová , Pavla; Žemlová , Tereza
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      The ignition and combustion behavior of biomass and biomass blends under typical heating conditions were investigated. Thermogravimetric analyses were performed on stalk and woody biomass, alone and blended with various ...

    • A Way to Use Waste Heat to Generate Thermoelectric Power 

      Autor: Brázdil , Marian; Pospíšil , Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      In recent years there has been rising interest in thermoelectric generation as a potential source of electric power using waste heat. This paper describes thermoelectric power generation from waste heat from biomass boilers, ...

    • About the time evolution of coherent electron states in monolayers of boron allotropes 

      Autor: Díaz-Bautista, Erik
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      In this paper, we theoretically analyze the massless Dirac fermion dynamics in twodimensional monolayers of boron allotropes, 8B and 2BH − pmmn borophene, interacting with external electric and magnetic fields. We study ...

    • ABOUT THE UNIFORMITY AND THE STABILITY OF A VOLUME DISCHARGE IN HELIUM IN NEAR-ATMOSPHERIC PRESSURE 

      Autor: Kurbanismailov Suliymanovich, Vali; Omarov Alievich, Omar; Ragimkhanov Balaglanovich, Gadjimirza; Aliverdiev Alexandrovich, Abutrab
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      We present experimental electric and time-spatial characteristics of a volume discharge and of the transition from a volume burning stage into a channel mode nearing atmospheric pressure. We show that the discharge uniformity ...

    • Accelerometer-assisted PPG Measurement During Physical Exercise Using the LAVIMO Sensor System 

      Autor: Santos , Susana Aguiar; Venema , Boudewijn; Leonhardt , Steffen
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      A method is presented for long-term monitoring of vital signs tested during physical exercise. The system is based on reflective photoplethysmography (PPG), whose main component is a micro-optoelectronic sensor. The sensor ...

    • ACCRETION DISKS WITH A LARGE SCALE MAGNETIC FIELD AROUND BLACK HOLES 

      Autor: Bisnovatyi-Kogan, Gennady; Klepnev, Alexandr S.; Lovelace, Richard V.E.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We consider accretion disks around black holes at high luminosity, and the problem of the formation of a large-scale magnetic field in such disks, taking into account the non-uniform vertical structure of the disk. The ...

    • Active disturbance rejection control-based anti-coupling method for conical magnetic bearings 

      Autor: Nguyen, Danh Huy; Vu, Minh Le; Trong , Hieu Do; Nguyen, Danh Giang; Nguyen, Tung Lam
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      Conical-shape magnetic bearings are currently a potential candidate for various magnetic force-supported applications due to their unique geometric nature reducing the number of required active magnets. However, the bearing ...

    • AD HOC TEAMWORK BEHAVIORS FOR INFLUENCING A FLOCK 

      Autor: Genter , Katie; Stone , Peter
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      Ad hoc teamwork refers to the challenge of designing agents that can influence the behavior of a team, without prior coordination with its teammates. This paper considers influencing a flock of simple robotic agents to ...

    • ADAPTIVE DISTRIBUTION OF A SWARM OF HETEROGENEOUS ROBOTS 

      Autor: Prorok , Amanda; Ani Hsieh , M.; Kumar , Vijay
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      We present a method that distributes a swarm of heterogeneous robots among a set of tasks that require specialized capabilities in order to be completed. We model the system of heterogeneous robots as a community of species, ...

    • ADAPTIVE WAVELETS SLIDING MODE CONTROL FOR A CLASS OF SECOND ORDER UNDERACTUATED MECHANICAL SYSTEMS 

      Autor: Nafa, Fares; Boudouda, Aimad; Smaani, Billel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The control of underactuated mechanical systems (UMS) remains an attracting field where researchers can develop their control algorithms. To this date, various linear and nonlinear control techniques using classical and ...

    • 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, ...

    • Adhesive Bonding of Aluminium Alloy A5754 by Epoxy Resins 

      Autor: Michalec , Ivan; Marônek , Milan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Joining thin sheets of aluminium and its alloys is a promising area in the field of joining materials. Nowadays, joining methods that do not melt the material itself are increasingly being utilised. This paper deals with ...

    • 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 ...

    • Advanced Functions of a Modern Power Source for GMAW Welding of Steel 

      Autor: Kolařík , Ladislav; Kolaříková , Marie; Kovanda , Karel; Pantůček , Marek; Vondrouš , Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper evaluates the use of a modern welding power source equipped with advanced arc control functions. At the Laboratory of Welding Technologies of CTU in Prague we have focused on GMAW welding of steel using Sigma ...