Prohlížení Acta Polytechnica dle názvu

Zobrazují se záznamy 21-40 z 908

    • A MATHEMATICAL MODEL OF GALVANIC CORROSION UNDER THE CONDITIONS OF A THIN ELECTROLYTE FILM 

      Autor: Jeníček , Vít; Diblíková , Linda
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      A mathematical model of galvanic corrosion under the conditions of a thin electrolyte film was used to evaluate atmospheric corrosion. Experimentally determined weight loss values were used to validate the modelled results. ...

    • A METHOD FOR EVALUATION OF NON-UNIFORM RADIANT-CONVECTIVE LOAD ON HUMAN BODY DURING MENTAL WORK 

      Autor: Prokšová Zuská , Lenka; Kabrhel , Michal
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The objective of this study was to develop a documentation for the amendment of the microclimatic part of the Czech Government Regulation, particularly in a non-uniform radiant-convective load evaluation. Changes in ...

    • A METHOD FOR MEASURING THE SENSITIVITY OF BUILDING STRUCTURAL MEMBERS TO FIRE DECAY PHASES 

      Autor: Gernay , Thomas
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      Firefighters face a major threat when intervening in a building during a fire: the possibility of structural collapse during the cooling phase of the fire, or soon thereafter. At present, this threat is amplified by the ...

    • A METHOD OF COMPLEX CALCULATION OF RATIONAL STRUCTURAL PARAMETERS OF RAILWAY HUMPS 

      Autor: Panchenko , Sergii; Ohar , Oleksandr; Kutsenko , Maksym; Smachilo , Julia
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The article deals with a method of complex calculation of rational structural parameters of humps at classification yards. Unlike existing methods, this method allows an implementation of the technology of guided gravity ...

    • A Micromechanics-Based Model for Stiffness and Strength Estimation of Cocciopesto Mortars 

      Autor: Nežerka , Václav; Zeman , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      The purpose of this paper is to propose an inexpensive micromechanics-based scheme for stiffness homogenization and strength estimation of mortars containing crushed bricks, known as cocciopesto. The model utilizes the ...

    • A mindlin shell finite element for stone masonry bridges with backfill 

      Autor: Řeřicha, Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      Stone masonry bridges are difficult to analyse with commercial finite element (FE) packages for their specific heterogeneous composition. The stone arch is best modelled as a thick shell where there are predestined directions ...

    • A model of isotope transport in the unsaturated zone, case study 

      Autor: Chudoba, Josef; Královcová, Jiřina; Landa, Jiří; Maryška, Jiří; Říha, Jakub
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      This work deals with a groundwater flow and solute transport model in the near-surface (predominantly unsaturated) zone. The model is implemented so that it allows simulations of contamination transport from a source located ...

    • 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 MYOELECTRIC PROSTHETIC ARM CONTROLLED BY A SENSOR-ACTUATOR LOOP 

      Autor: Kutílek , Patrik; Hýbl , Jan; Mareš , Jakub; Socha , Vladimír; Smrčka , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      This paper describes new methods and systems designed for application in upper extremity prostheses. An artificial upper limb with this system is a robot arm controlled by EMG signals and a set of sensors. The new multi-sensor ...

    • A Network Simulation Tool for Task Scheduling 

      Autor: Votava , Ondřej
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      Distributed computing may be looked at from many points of view. Task scheduling is the viewpoint, where a distributed application can be described as a Directed Acyclic Graph and every node of the graph is executed ...

    • A Neural Network Model for Predicting NOx at the Mělník 1 

      Autor: Bukovský , Ivo; Kolovratník , Michal
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper presents a non-conventional dynamic neural network that was designed for real time prediction of NOx at the coal powder power plant Mělnik 1, and results on real data are shown and discussed. The paper also ...

    • 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 NEW FASTENER TO ENSURE THE RELIABILITY OF A PASSENGER CAR BODY ON A TRAIN FERRY 

      Autor: Lovska, Alyona; Fomin , Oleksij
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      To ensure the strength of the passenger car bodies during transportation on train ferries, it is proposed to mount fastening elements of chain binders on the body bolster beams. The principle of such an element is based ...

    • A new structural reconfiguration for multilevel inverters with fault tolerance capability 

      Autor: Lakhdari, Meftah; Rabhi, Boualaga; Benaissa, Amar
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)
      Keeping electrical systems running is critical in industries especially in those that rely on static converters, for example in the case of inverters, continuous and safe of operation must be ensured even if one of the ...

    • A note on entanglement classification for tripartite mixed states 

      Autor: Zhao, Hui; Liu, Yu-Qiu; Wang, Zhi-Xi; Fei, Shao-Ming
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      We study the classification of entanglement in tripartite systems by using Bell-type inequalities and principal basis. By using Bell  unctions and the generalized three dimensional Pauli operators, we present a set of Bell ...

    • A NOVEL BCG SENSOR-ARRAY FOR UNOBTRUSIVE CARDIAC MONITORING 

      Autor: Böhm , Anna; Brüser , Christoph; Leonhardt , Steffen Leonhardt
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Unobtrusive heart rate monitoring is a popular research topic in biomedical engineering. The reason is that convential methods, e.g. the clinical gold standard electrocardiography, require conductive contact to the human ...

    • 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 Numerical Study of Wind Flow Over a Coal Storage Shelter 

      Autor: Bodnár , Tomáš; Beneš , Ludek; Pirkl , Luboš; Gulíková , Eva
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper presents some of the main numerical results obtained while simulating the wind flow over a shelter covering a coal storage. The aim of this numerical study was to evaluate the change in flow patterns caused by ...

    • A practical way to apply a technique that accelerates time history analysis of structures under digitised excitations 

      Autor: Soroushian, Aram
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)
      Time history analysis using direct time integration is a versatile and widely accepted tool for analysing the dynamic behaviour of structures. In 2008, a technique was proposed to accelerate the time history analysis of ...

    • A Pulverized Coal-Fired Boiler Optimized for Oxyfuel Combustion Technology 

      Autor: Dlouhý , Tomáš; Dupal , Tomáš; Dlouhý , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper presents the results of a study on modifying a pulverized coal-fired steam boiler in a 250 MWe power plant for oxygen combustion conditions. The entry point of the study is a boiler that was designed for standard ...