Recent Submissions

  • Sharp Feature Detection as a Useful Tool in Smart Manufacturing 

    Procházková, Jana; Procházka, David; Landa, Jaromír (MDPI, 2020-06-30)
    Industry 4.0 comprises of wide spectrum of developmental processes within the management of manufacturing and chain production. This intension leads to the increased need for high-quality methods for digitization and object ...
  • A mixed integer linear programming model applied in barge planning for Omya 

    Bredstroem, David; Haugen, Kjetil Kare; Olstad, Asmund; Novotný, Jan (Elsevier, 2015-12-01)
    The article presents a mathematical model for barge transport planning, which is part of a decision support system recently taken into use by the Swiss company Omy. The barge-planning problem falls in the category of ...
  • Dual Numbers Approach in Multiaxis Machines Error Modeling 

    Hrdina, Jaroslav; Vašík, Petr (Hindawi, 2014-06-01)
    Multiaxis machines error modeling is set in the context of modern differential geometry and linear algebra. We apply special classes of matrices over dual numbers and propose a generalization of such concept by means of ...
  • Straddled numbers: numbers equal to the sum of powers of consecutive primes from the least prime factor to the largest prime factor 

    Kureš, Miroslav (Bulgarian Academy of Sciences, 2019-07-02)
    Positive integers equal to the sum of powers of consecutive primes from the least prime factor to the largest prime factor are studied. They are called the straddled numbers and their properties are derived. There are also ...
  • Precision Machining of Nimonic C 263 Super AlloyUsing WEDM 

    Mouralová, Kateřina; Beneš, Libor; Bednář, Josef; Zahradníček, Radim; Prokeš, Tomáš; Fiala, Zdeněk; Fries, Jiří (MDPI, 2020-06-24)
    Wire electrical discharge machining (WEDM) is an unconventional and very efficient technology for precision machining of the Nimonic C 263 super alloy, which is very widespread, especially in the energy, aerospace and ...
  • Analysis of Machinability and Crack Occurrence of Steels 1.2363 and 1.2343ESR Machined by Die-Sinking EDM 

    Mouralová, Kateřina; Beneš, Libor; Bednář, Josef; Zahradníček, Radim; Prokeš, Tomáš; Fries, Jiří (MDPI, 2020-04-19)
    Die-sinking electric discharge machining (EDM) is an indispensable technological operation, especially in the production of molds and all internal and external shapes and cavities. For this reason, the effect of machine ...
  • Simulation of the acoustic wave propagation using a meshless method 

    Bajko, Jaroslav; Niedoba, Pavel; Čermák, Libor; Jícha, Miroslav (EDP Sciences, 2017-05-12)
    This paper presents numerical simulations of the acoustic wave propagation phenomenon modelled via Linearized Euler equations. A meshless method based on collocation of the strong form of the equation system is adopted. ...
  • On a product of universal hyperalgebras 

    Šlapal, Josef; Chaisansuk, Nitima (Faculty of Mathematics and Computer Science, Ovidius University, 2015-05-15)
    We introduce and study a new operation of product of universal hyperalgebras which lies, with respect to set inclusion, between the cartesian product of the hyperalgebras and the cartesian product of their idempotent hulls. ...
  • On the stability of some properties of partial algebras under powers 

    Šlapal, Josef; Leeratanavalee, Sorasak; Chaisansuk, Nitima (SAV, 2014-04-01)
    In the paper, we study eight properties of partial algebras most of which are related to diagonality. For each of the properties, we give sufficient conditions under which this property is preserved by powers of partial algebras.
  • Local controllability of trident snake robot based on sub-Riemannian extremals 

    Hrdina, Jaroslav (Universit`a del Salento, 2017-05-24)
    To solve trident snake robot local controllability by differential geometry tools, we construct a privileged system of coordinates with respect to the distribution given by Pffaf system based on local nonholonomic conditions ...
  • Applications of the discontinuous Galerkin method to propagating acoustic wave problems 

    Nytra, Jan; Čermák, Libor; Jícha, Miroslav (SAGE Publishing, 2017-06-16)
    The purpose of this article is to demonstrate that the discontinuous Galerkin method is efficient and suitable to solve linearized Euler equations, modelling sound propagation phenomena.
  • Three-axes error modeling based on second order dual numbers 

    Holub, Michal; Hrdina, Jaroslav; Vašík, Petr; Vetiška, Jan (Springer-Verlag, 2015-11-17)
    The aim of the paper is to employ the dual numbers in the multi axes machine error modelling in order to apply the algebraic methods in computations. The calculus of higher order dual numbers allows us to calculate with ...
  • Reconstruction of an ellipse from its raster image 

    Hrdina, Jaroslav; Pavlík, Jan (Academic Publications, Ltd, 2015-04-14)
    Motivated by practical application, we investigate the ways how to obtain a description of an ellipse whose circumscribed rectangle is known exactly and whose coordinates of touching points are known up to a certain ...
  • Pool & Discard Algorithm for Chance Constrained Optimization Problems 

    Kůdela, Jakub; Popela, Pavel (IEEE, 2020-04-27)
    In this paper, we describe an effective algorithm for handling chance constrained optimization problems, called the Pool & Discard algorithm. The algorithm utilizes the scenario approximation framework for chance constrained ...
  • Registration of Partially Focused Images for 2D and 3D Reconstruction of Oversized Samples 

    Martišek, Dalibor; Druckmüllerová, Hana (Hindawi, 2017-12-18)
    Methods of fracture surface 3D reconstruction from a series of partially focused images acquired in a small field of view (e.g., by confocal microscope or CCD camera) are well known. In this case, projection rays can be ...
  • Fluid metabolism in athletes running seven marathons in seven consecutive days 

    Chlíbková, Daniela; Nikolaidis, Pantelis T.; Rosemann, Thomas; Knechtle, Beat; Bednář, Josef (Frontiers, 2018-02-12)
    Navzdory poklesu tělesné hmotnosti byla rovnováha tekutin a elektrolytů udržována bez poklesu plazmatického objemu a celkové tělesné vody po sedmi maratónech během sedmi po sobě jdoucích dnů. Toto je první úplná studie o ...
  • Stability of the zero solution of nonlinear differential equations under the influence of white noise 

    Dzhalladova, Irada; Růžičková, Miroslava; Štoudková Růžičková, Viera (SpringerOpen, 2015-05-07)
    The paper deals with a system of nonlinear differential equations under the influence of white noise. This system can be used as a mathematical model of various real problems in finance, mathematical biology, climatology, ...
  • Fredholm alternative for the second-order singular Dirichlet problem 

    Lomtatidze, Aleksandre; Opluštil, Zdeněk (Springer, 2014-01-13)
    It is found condition guarantees the validity of the Fredholm alternative for the second-order singular Dirichlet problem.
  • On elliptic curves with a closed component passing through a hexagon 

    Kureš, Miroslav (Ovidius University, 2019-06-01)
    In general, there exists an ellipse passing through the vertices of a convex pentagon, but there is no ellipse passing through the vertices of a convex hexagon. Thus, attention is turned to algebraic curves of the third ...
  • Fredholm's third theorem for second order singular Dirichlet problem 

    Lomtatidze, Aleksandre; Opluštil, Zdeněk (Springer, 2014-03-18)
    There are found conditions guarantee the validity of the third Fredholm's theorem for the second-order singular Dirichlet problem.

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