Browsing Ústav matematiky by Title
Now showing items 1-20 of 40
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Analysis of Machinability and Crack Occurrence of Steels 1.2363 and 1.2343ESR Machined by Die-Sinking EDM
(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 ... -
Applications of the discontinuous Galerkin method to propagating acoustic wave problems
(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. -
Automatic lane marking extraction from point cloud into polygon map layer
(Tayor and Francis, 2019-01-25)This paper concentrates on the road inventory process. The key part of road marking detection and reconstruction is based on spanning tree usage. The spanning trees are obtained from alpha shapes of the detected road ... -
A characterization of sliding vectors by dual numbers, some dual curves and the screw calculus
(Elsevier, 2019-12-31)Moving vectors, motors and screws are introduced and the mathematical background is explained: dual numbers are used for their description. Further, the paper deals with the dual space and curves in it. Some examples (in ... -
Decaying positive global solutions of second order difference equations with mean curvature operator
(University of Szeged, 2020-12-21)A boundary value problem on an unbounded domain, associated to difference equations with the Euclidean mean curvature operator is considered. The existence of solutions which are positive on the whole domain and decaying ... -
Dual Numbers Approach in Multiaxis Machines Error Modeling
(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 ... -
The Effect of Sterilization on Size and Shape of Fat Globules in Model Processed Cheese Samples
(University of Veterinary and Pharmaceutical Sciences in Brno, 2006-05-11)Model cheese samples from 4 independent productions were heat sterilized (117 C, 20 minutes), after the melting process and packing with an aim to prolong their durability. The objective of the, study was to assess changes ... -
Fluid metabolism in athletes running seven marathons in seven consecutive days
(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 ... -
Fredholm alternative for the second-order singular Dirichlet problem
(Springer, 2014-01-13)It is found condition guarantees the validity of the Fredholm alternative for the second-order singular Dirichlet problem. -
Fredholm's third theorem for second order singular Dirichlet problem
(Springer, 2014-03-18)There are found conditions guarantee the validity of the third Fredholm's theorem for the second-order singular Dirichlet problem. -
Funkcionální analýza s aplikacemi ve zpracování signálů
(Vysoké učení technické v Brně, 2015-01-01)Látka je rozčleněna do sedmi kapitol s cílem podat ucelený výklad základů lineární funkcionální analýzy, který čtenáři umožní hlouběji pochopit matematickou podstatu a usnadnit tak následné studium podle aplikačního zaměření. ... -
The Influence of WEDM Parameters Setup on the Occurrence of Defects when Machining Hardox 400 Steel
(MDPI, 2019-11-09)The unconventional WEDM technology is a highly used technology for producing precise and indented shaped parts of all at least electrically conductive materials. This wide use makes this technology applicable in almost all ... -
Komprimované snímání perfúzního zobrazování v MRI
(Společnost elektrotechnického inženýrství, 2013-11-20)Perfúzní zobrazování v MRI je lékařská diagnostická metoda, kdy pacientovi podáme kontrastní látku a poté průběžně sledujeme průběh její koncentrace v postižené oblasti. Tuto závislost můžeme přibližně matematicky popsat ... -
Local controllability of trident snake robot based on sub-Riemannian extremals
(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 ... -
Meshfree methods for computational fluid dynamics
(EDP Sciences, 2012-11-20)The paper deals with the convergence problem of the SPH (Smoothed Particle Hydrodynamics) meshfree method for the solution of fluid dynamics tasks. In the introductory part, fundamental aspects of meshfree methods, their ... -
A mixed integer linear programming model applied in barge planning for Omya
(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 ... -
A new generalized projection and its application to acceleration of audio declipping
(MDPI, 2019-09-19)In convex optimization, it is often inevitable to work with projectors onto convex sets composed with a linear operator. Such a need arises from both the theory and applications, with signal processing being a prominent ... -
On a product of universal hyperalgebras
(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 elliptic curves with a closed component passing through a hexagon
(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 ... -
On Münchhausen numbers
(Bulgarian Academy of Sciences, 2021-03-16)The remarkable property of the number 3435, namely 3435 = 3^3 + 4^4 + 3^3 + 5^5, was formalized to the notion of Münchhausen numbers. Properties of these numbers are studied and it is showed that although there are only ...