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two links (head and tail). All calculations including the position, direct kinematics, differential kinematics and
inverse kinematics are described in the terms of CGA only.
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two links (head and tail). All calculations including the position, direct kinematics, differential kinematics and
inverse kinematics are described in the terms of CGA only.
[klicova_slova] => Robotic snake, conformal geometric algebra, nonholonomic kinematics
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[citace_text] => HRDINA, J.; NÁVRAT, A.; VAŠÍK, P.; MATOUŠEK, R. Local control of (4,5,7,8-10)-filtration snake robot via CGA. Mendel Journal series, 2017, vol. 23, no. 1, p. 157-162. ISSN: 1803-3814.
[citace_html] => HRDINA, J.; NÁVRAT, A.; VAŠÍK, P.; MATOUŠEK, R. Local control of (4,5,7,8-10)-filtration snake robot via CGA. Mendel Journal series, 2017, vol. 23, no. 1, p. 157-162. ISSN: 1803-3814.
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author="Jaroslav {Hrdina} and Aleš {Návrat} and Petr {Vašík} and Radomil {Matoušek}",
title="Local control of (4,5,7,8-10)-filtration snake robot via CGA",
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year="2017",
volume="23",
number="1",
pages="157--162",
issn="1803-3814"
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two links (head and tail). All calculations including the position, direct kinematics, differential kinematics and
inverse kinematics are described in the terms of CGA only.
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[citace_text] => HRDINA, J.; MATOUŠEK, R.; NÁVRAT, A.; VAŠÍK, P. Nilpotent approximation of a trident snake robot controlling distribution. KYBERNETIKA, 2017, vol. 53, no. 6, p. 1118-1130. ISSN: 0023-5954.
[citace_html] => HRDINA, J.; MATOUŠEK, R.; NÁVRAT, A.; VAŠÍK, P. Nilpotent approximation of a trident snake robot controlling distribution. KYBERNETIKA, 2017, vol. 53, no. 6, p. 1118-1130. ISSN: 0023-5954.
[citace_rtf] =>
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number="6",
pages="1118--1130",
doi="10.14736/kyb-2017-6-1118",
issn="0023-5954",
url="https://www.kybernetika.cz/content/2017/6/1118"
}
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[popis_en] => We construct a privileged system of coordinates with respect to the controlling distribution of a trident snake robot and, furthermore, we construct a nilpotent approximation with respect to the given filtration. Note that all constructions are local in the neighbourhood of a particular point. We compare the motions corresponding to the Lie bracket of the original controlling vector fields and their nilpotent approximation.
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[citace_rtf] =>
[citace_bibtex] => @article{BUT145653,
author="Josef {Nevrlý} and Zdeněk {Němec} and Jan {Brandejs}",
title="CONTROL SYSTEM OF HYDRAULIC RECOVERY MODULE OF ROAD ROLLER",
journal="MM Science Journal",
year="2017",
volume="2",
number="5",
pages="1905--1909",
doi="10.17973/MMSJ.2017\{_}12\{_}201613",
issn="1803-1269",
url="http://www.mmscience.eu/december-2017.html"
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[popis_en] => The paper describes original control system f of developed hydraulic module for energy recovery for road roller. Due to energy recovery, fuel consumption of driving inner combustion engine was lowered approximately by 26 per cent at some operation regimes.
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[duvernost_udaju_id] => S
[popis] => We establish conditions for the unique solvability of periodic boundary value problem for second-order linear equations. We make more precise a result proved in [3].
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[klicova_slova] => Periodic boundary value problem; Second-order linear equation; Unique solvability
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[ins_ts] => 2025-09-22
[upd_ts] => 2025-09-22
[status] => 9
[identifikator] => ISSN 1072-6691
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[citace_text] => LOMTATIDZE, A.; DOSOUDILOVÁ, M. Remark on periodic boundary-value problem for second-order linear ordinary differential equations. Electronic Journal of Differential Equations, 2018, vol. 2018, no. 13, p. 1-7. ISSN: 1072-6691.
[citace_html] => LOMTATIDZE, A.; DOSOUDILOVÁ, M. Remark on periodic boundary-value problem for second-order linear ordinary differential equations. Electronic Journal of Differential Equations, 2018, vol. 2018, no. 13, p. 1-7. ISSN: 1072-6691.
[citace_rtf] =>
[citace_bibtex] => @article{BUT146537,
author="Aleksandre {Lomtatidze} and Monika {Dosoudilová}",
title="Remark on periodic boundary-value problem for second-order linear ordinary differential equations",
journal="Electronic Journal of Differential Equations",
year="2018",
volume="2018",
number="13",
pages="1--7",
issn="1072-6691",
url="https://ejde.math.txstate.edu/Volumes/2018/13/dosoudilova.pdf"
}
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[popis] => Wire electrical discharge machining (WEDM) is a key technological process for the production of parts from semi-finished products to the final heat treatment as it also enables the machining of very hard material. The quality of an electro-erosive machined surface is a very important factor with regard to the consequent functionality and life cycle of the manufactured part. The occurrence of cracks or burned cavities is therefore an acceptable defect of the sub-surface area, which along with residual stress may lead to the destruction of the machining. This study deals with the influence of the cut direction through a semi-finished product on the occurrence of defects (cracks, burned cavities) regarding the influence of setting up the parameters of the machine (gap voltage, pulse on and off time, wire feed and discharge current) and the type of heat treatment of the material. In order to study the surface and sub-surface area of the machined samples, electron microscopy was used, including the use of the local EDX chemical analysis.
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[citace_text] => MOURALOVÁ, K.; KLAKURKOVÁ, L.; MATOUŠEK, R.; PROKEŠ, T.; HRDÝ, R.; KAŇA, V. Influence of the Cut Direction through the Semi-Finished Product on the Occurrence of Cracks for X210Cr12 Steel Using WEDM. Archives of Civil and Mechanical Engineering, 2018, vol. 18, no. 4, p. 1318-1331. ISSN: 1644-9665.
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title="Influence of the Cut Direction through the Semi-Finished Product on the Occurrence of Cracks for X210Cr12 Steel Using WEDM",
journal="Archives of Civil and Mechanical Engineering",
year="2018",
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method comparison. In the practical use of the LQR method, the key problem is how to choose weight matrices
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[klicova_slova] => modeling, electric, dríve, pump, excavator
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[citace_text] => Nevrlý Josef, Němec Zdeněk, Pazdera Ivo, Nožka Michal. Modelling of electric drive for excavator pump. In Engineering Mechanics 2018. Engineering Mechanics. Praha: 2018. p. 593-596. ISBN: 978-80-86246-88-8. ISSN: 1805-8248.
[citace_html] => Nevrlý Josef, Němec Zdeněk, Pazdera Ivo, Nožka Michal. Modelling of electric drive for excavator pump. In Engineering Mechanics 2018. Engineering Mechanics. Praha: 2018. p. 593-596. ISBN: 978-80-86246-88-8. ISSN: 1805-8248.
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[citace_html] => HRDINA, J.; NÁVRAT, A.; VAŠÍK, P. Geometric Algebra for Conics. Advances in Applied Clifford Algebras, 2018, vol. 28, no. 3, p. 66-87. ISSN: 0188-7009.
[citace_rtf] =>
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author="Jaroslav {Hrdina} and Aleš {Návrat} and Petr {Vašík}",
title="Geometric Algebra for Conics",
journal="Advances in Applied Clifford Algebras",
year="2018",
volume="28",
number="3",
pages="66--87",
doi="10.1007/s00006-018-0879-2",
issn="0188-7009",
url="https://link.springer.com/article/10.1007/s00006-018-0879-2?wt_mc=alerts.TOCjournals&utm_source=toc&utm_medium=email&utm_campaign=toc_6_28_3"
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[popis_en] => We present a particular geometric algebra together with such an embedding of two–dimensional Euclidean space that the algebra elements may be in the most efficient way interpreted as arbitrary conic sections. Consequently, in this setting we provide full description of the conic sections analysis, classification and their transformations. Examples that show the functionality and consistency are provided in Maple together with the source code.
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[nazev] => Robust Waste Transfer Station Planning by Stochastic Programming
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[duvernost_udaju_id] => S
[popis] => Regarding the infrastructure planning in waste management, the future situation in the Czech Republic or in
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a feature might be the transfer station grid, which can decrease the total transportation costs/impact on the
environment. The grid design should be robust with respect to all the possible technological solutions
(establishment of waste treatment facilities). In this paper, the mathematical model for grid design of transfer
stations is proposed. The model will be presented as a two-stage mixed-integer stochastic programming
problem. The model will be tested through a case study on the current situation and possible legislation changes
regarding waste management in the Czech Republic. The model scale will be on the micro-regional level
proposing a robust transfer station grid design. The realization of these projects takes into consideration possible
investments and decides about the capacity of the facility with regards to future government support and
donations. The output in the form of recommendation will serve possible investors, municipalities and/or
stakeholders from the field of waste management to plan more sustainable projects.
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some other waste developing countries is unknown due to the undecided support from the government or the
EU. Furthermore, the production of waste depends on many factors (e.g. separation rate) that are uncertain.
The level of recycling will be influenced by technical progress while taking into account the compromise between
maximum waste material recovery and the economic impact of the process. Nevertheless, it is important to plan
the transportation infrastructure that will be able to support the realization of future projects/development. Such
a feature might be the transfer station grid, which can decrease the total transportation costs/impact on the
environment. The grid design should be robust with respect to all the possible technological solutions
(establishment of waste treatment facilities). In this paper, the mathematical model for grid design of transfer
stations is proposed. The model will be presented as a two-stage mixed-integer stochastic programming
problem. The model will be tested through a case study on the current situation and possible legislation changes
regarding waste management in the Czech Republic. The model scale will be on the micro-regional level
proposing a robust transfer station grid design. The realization of these projects takes into consideration possible
investments and decides about the capacity of the facility with regards to future government support and
donations. The output in the form of recommendation will serve possible investors, municipalities and/or
stakeholders from the field of waste management to plan more sustainable projects.
[klicova_slova] => transfer station planning; stochastic programming; mixed-integer programming
[klicova_slova_orig] => transfer station planning; stochastic programming; mixed-integer programming
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[citace_text] => KŮDELA, J.; ŠOMPLÁK, R.; NEVRLÝ, V.; LIPOVSKÝ, T. Robust Waste Transfer Station Planning by Stochastic Programming. Chemical Engineering transactions, 2018, vol. 70, no. 1, p. 889-894. ISSN: 2283-9216.
[citace_html] => KŮDELA, J.; ŠOMPLÁK, R.; NEVRLÝ, V.; LIPOVSKÝ, T. Robust Waste Transfer Station Planning by Stochastic Programming. Chemical Engineering transactions, 2018, vol. 70, no. 1, p. 889-894. ISSN: 2283-9216.
[citace_rtf] =>
[citace_bibtex] => @article{BUT148969,
author="Jakub {Kůdela} and Radovan {Šomplák} and Vlastimír {Nevrlý} and Tomáš {Lipovský}",
title="Robust Waste Transfer Station Planning by Stochastic Programming",
journal="Chemical Engineering transactions",
year="2018",
volume="70",
number="1",
pages="889--894",
doi="10.3303/CET1870149",
url="http://www.aidic.it/cet/18/70/149.pdf"
}
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[popis_en] => Regarding the infrastructure planning in waste management, the future situation in the Czech Republic or in
some other waste developing countries is unknown due to the undecided support from the government or the
EU. Furthermore, the production of waste depends on many factors (e.g. separation rate) that are uncertain.
The level of recycling will be influenced by technical progress while taking into account the compromise between
maximum waste material recovery and the economic impact of the process. Nevertheless, it is important to plan
the transportation infrastructure that will be able to support the realization of future projects/development. Such
a feature might be the transfer station grid, which can decrease the total transportation costs/impact on the
environment. The grid design should be robust with respect to all the possible technological solutions
(establishment of waste treatment facilities). In this paper, the mathematical model for grid design of transfer
stations is proposed. The model will be presented as a two-stage mixed-integer stochastic programming
problem. The model will be tested through a case study on the current situation and possible legislation changes
regarding waste management in the Czech Republic. The model scale will be on the micro-regional level
proposing a robust transfer station grid design. The realization of these projects takes into consideration possible
investments and decides about the capacity of the facility with regards to future government support and
donations. The output in the form of recommendation will serve possible investors, municipalities and/or
stakeholders from the field of waste management to plan more sustainable projects.
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[nazev] => Quality of Surface and Subsurface Layers after WEDM Aluminum Alloy 7475-T7351 Including Analysis of TEM Lamella
[nazev_orig] => Quality of Surface and Subsurface Layers after WEDM Aluminum Alloy 7475-T7351 Including Analysis of TEM Lamella
[duvernost_udaju_id] => S
[popis] => Wire electrical discharge machining (WEDM) is an unconventional machining method indispensable especially for the aeronautical and automotive industries. In this context, the effective manufacturing of high surface quality components from aluminium alloy7475-T7351 requires comprehensive knowledge of the applied production procedures. We therefore performed a designed experiment comprising 33 cycles (with systematic alteration of machine setting parameters such as gap voltage, pulse on time, pulse off time, discharge current, and wire feed), enabling us to evaluate systematically the cutting speeds in the relevant samples. The machined areas were subjected to a thorough analysis involving both the surface and the subsurface layers. The actual topography was assessed using a non-contact profiler, and the entire operation concentrated on 12 parameters within the areal, profile, and basic and bearingprofile categories.To observe the surface relief, we employed several instruments, including the semi-contact atomic force microscopy (AFM) technique;a digital microscope; and a non-contact 3D profiler. Another major step then consisted in examining the morphology and surface defects, a process suitably complemented with a chemical composition analysis (EDX). The distribution of individual elements within the material was investigated in detail using a lamella, whose subsequent inspection relied on atransmission electron microscope (TEM) as the principal tool. To study the subsurface layer and its defects, we prepared metallographic specimens (cross-sections) of the samples and observed them by means of light and electron microscopes.
[popis_orig] => Wire electrical discharge machining (WEDM) is an unconventional machining method indispensable especially for the aeronautical and automotive industries. In this context, the effective manufacturing of high surface quality components from aluminium alloy7475-T7351 requires comprehensive knowledge of the applied production procedures. We therefore performed a designed experiment comprising 33 cycles (with systematic alteration of machine setting parameters such as gap voltage, pulse on time, pulse off time, discharge current, and wire feed), enabling us to evaluate systematically the cutting speeds in the relevant samples. The machined areas were subjected to a thorough analysis involving both the surface and the subsurface layers. The actual topography was assessed using a non-contact profiler, and the entire operation concentrated on 12 parameters within the areal, profile, and basic and bearingprofile categories.To observe the surface relief, we employed several instruments, including the semi-contact atomic force microscopy (AFM) technique;a digital microscope; and a non-contact 3D profiler. Another major step then consisted in examining the morphology and surface defects, a process suitably complemented with a chemical composition analysis (EDX). The distribution of individual elements within the material was investigated in detail using a lamella, whose subsequent inspection relied on atransmission electron microscope (TEM) as the principal tool. To study the subsurface layer and its defects, we prepared metallographic specimens (cross-sections) of the samples and observed them by means of light and electron microscopes.
[klicova_slova] => WEDM; electrical discharge machining; aluminium alloy 7475-T7351; morphology; topography; TEM lamella; Design of experiment
[klicova_slova_orig] => WEDM; electrical discharge machining; aluminium alloy 7475-T7351; morphology; topography; TEM lamella; Design of experiment
[url] => https://link.springer.com/article/10.1007%2Fs00170-018-2626-1
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[identifikator] => ISSN 0268-3768
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[citace_text] => MOURALOVÁ, K.; BENEŠ, L.; ZAHRADNÍČEK, R.; BEDNÁŘ, J.; HRABEC, P.; PROKEŠ, T.; MATOUŠEK, R.; FIALA, Z. Quality of Surface and Subsurface Layers after WEDM Aluminum Alloy 7475-T7351 Including Analysis of TEM Lamella. International Journal of Advanced Manufacturing Technology, 2018, vol. 99, no. 9, p. 2309-2326. ISSN: 1433-3015.
[citace_html] => MOURALOVÁ, K.; BENEŠ, L.; ZAHRADNÍČEK, R.; BEDNÁŘ, J.; HRABEC, P.; PROKEŠ, T.; MATOUŠEK, R.; FIALA, Z. Quality of Surface and Subsurface Layers after WEDM Aluminum Alloy 7475-T7351 Including Analysis of TEM Lamella. International Journal of Advanced Manufacturing Technology, 2018, vol. 99, no. 9, p. 2309-2326. ISSN: 1433-3015.
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[citace_bibtex] => @article{BUT149062,
author="Kateřina {Mouralová} and Libor {Beneš} and Radim {Zahradníček} and Josef {Bednář} and Pavel {Hrabec} and Tomáš {Prokeš} and Radomil {Matoušek} and Zdeněk {Fiala}",
title="Quality of Surface and Subsurface Layers after WEDM Aluminum Alloy 7475-T7351 Including Analysis of TEM Lamella",
journal="International Journal of Advanced Manufacturing Technology",
year="2018",
volume="99",
number="9",
pages="2309--2326",
doi="10.1007/s00170-018-2626-1",
issn="0268-3768",
url="https://link.springer.com/article/10.1007%2Fs00170-018-2626-1"
}
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[nazev_en] => Quality of Surface and Subsurface Layers after WEDM Aluminum Alloy 7475-T7351 Including Analysis of TEM Lamella
[popis_en] => Wire electrical discharge machining (WEDM) is an unconventional machining method indispensable especially for the aeronautical and automotive industries. In this context, the effective manufacturing of high surface quality components from aluminium alloy7475-T7351 requires comprehensive knowledge of the applied production procedures. We therefore performed a designed experiment comprising 33 cycles (with systematic alteration of machine setting parameters such as gap voltage, pulse on time, pulse off time, discharge current, and wire feed), enabling us to evaluate systematically the cutting speeds in the relevant samples. The machined areas were subjected to a thorough analysis involving both the surface and the subsurface layers. The actual topography was assessed using a non-contact profiler, and the entire operation concentrated on 12 parameters within the areal, profile, and basic and bearingprofile categories.To observe the surface relief, we employed several instruments, including the semi-contact atomic force microscopy (AFM) technique;a digital microscope; and a non-contact 3D profiler. Another major step then consisted in examining the morphology and surface defects, a process suitably complemented with a chemical composition analysis (EDX). The distribution of individual elements within the material was investigated in detail using a lamella, whose subsequent inspection relied on atransmission electron microscope (TEM) as the principal tool. To study the subsurface layer and its defects, we prepared metallographic specimens (cross-sections) of the samples and observed them by means of light and electron microscopes.
[klicova_slova_en] => WEDM; electrical discharge machining; aluminium alloy 7475-T7351; morphology; topography; TEM lamella; Design of experiment
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