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Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 1 až 20 z 308
Hynčík, Luděk , Bońkowski, Tomasz , Vychytil, Jan
Virtual hybrid human body model for PTW safety assessment

Road traffic accidents cause one of the highest numbers of severe injuries. The numbers of deaths and seriously injured citizens prove that traffic accidents and their consequences are still a serious problem to be solved. Virtual human body models play an important role...

Bońkowski, Tomasz , Šoltés, Lukáš , Hynčík, Luděk , Kottner, Radek , Kochová, Petra
Leather for motorcyclist garments: Multi-test based material model fitting in terms of Ogden parameters

This paper is focused on experimental testing and modeling of genuine leather used for a motorcycle personal protective equipment. Simulations of powered two wheelers (PTW) accidents are usually performed using human body models (HBM) for the injury assessment equipped only with ...

Lašová, Zuzana , Zemčík, Robert
Determination of group velocity of propagation of Lamb waves in aluminium plate using piezoelectric transducers

A prior knowledge of group velocities of Lamb wave modes is a key for analysis of time signals in guidedwave based structural health monitoring. The identification of multiple wave modes may be complicated due to dependency of group velocity on frequency (dispersion). These&...

Drábek, Pavel , Robinson, Stephen
Convergence to higher-energy stationary solutions of a bistable equation with nonsmooth reaction term

In this paper, we investigate the local stability of critical points with energy that is higher than the ground-state energy of the functional associated with the bistable equation. We assume that a double-well potential lacks C^2 regularity at the global minimizers. Previous work ...

Bobkov, Vladimír , Drábek, Pavel
On some unexpected properties of radial and symmetric eigenvalues and eigenfunctions of the p-Laplacian onadisk

We discuss several properties of eigenvalues and eigenfunctions of the p-Laplacian on a ball subject to zero Dirichlet boundary conditions. Among main results, in two dimensions, we show the existence of nonradial eigenfunctions which correspond to the radial eigenvalues.

Bizzarri, Michal , Lávička, Miroslav , Kosinka, Jiří
Skinning and blending with rational envelope surfaces

We continue the study of rational envelope (RE) surfaces. Although these surfaces are parametrized with the help of square roots, when considering an RE patch as the medial surface transform in 4D of a spatial domain it yields a rational parametrization of the domain’s boundar...

Bizzarri, Michal , Lávička, Miroslav
Rational adaptive blends among obstacles in 3D by contour method

In this paper we will continue in investigating ‘contour method’ and its using for the computation of rational parameterizations of canal surfaces without a need of sum of squares (SOS) decomposition. Further approaches for constructing flexible smooth transitions between canal surfaces will...

Chrášťanská, Dana , Böhmová, Hana , Marek, Patrice
Rapid palatal expansion in mixed dentition, stability

Aims: The study focused on the evaluation of changes in upper and lower dental arch following rapid palatal expansion (RPE) in mixed dentition and the expansion stability into the permanent dentition. Material: The first sample (HYRAX group) included 31 patients with RPE in mixed&#...

Agudelo Rico, Oscar Iván , Drábek, Pavel
Anisotropic semipositone quasilinear problems

We present the existence of positive solutions for a degenerate (or singular) quasilinear equation in a ball or in the entire space. As differential operator we consider a weighted p-Laplacian with a continuous cofficient satisfying a mild integrability condition towards the boundary of...

Bizzarri, Michal , Lávička, Miroslav , Šír, Zbyněk , Vršek, Jan
Hermite interpolation by piecewise polynomial surfaces with polynomial area element

This paper is devoted to the construction of polynomial 2-surfaces which possess a polynomial area element. In particular we study these surfaces in the Euclidean space R^3 (where they are equivalent to the PN surfaces) and in the Minkowski space R^{3,1} (where they provide th...

Soutner, Daniel , Müller, Luděk
On continuous space word representations as input of LSTM language model

Artificial neural networks have become the state-of-the-art in the task of language modelling whereas Long-Short Term Memory (LSTM) networks seem to be an efficient architecture. The continuous skip-gram and the continuous bag of words (CBOW) are algorithms for learning quality distributed v...

Přibil, Jiří , Přibilová, Anna , Matoušek, Jindřich
GMM classification of text-to-speech synthesis: identification of original speaker’s voice

This paper describes two experiments. The first one deals with evaluation of synthetic speech quality by reverse identification of original speakers whose voices had been used for several Czech text-to-speech (TTS) systems. The second experiment was aimed at evaluation of the influence ...

Hanzlíček, Zdeněk , Grůber, Martin
Initial experiments on automatic correction of prosodic annotation of large speech corpora

Most modern speech synthesis systems utilize large speech corpora to learn new voices. These speech corpora usually contain several hours of speech spoken by talented speakers who are able to record such an amount of speech data in a sufficient quality. An appropriate phonetic ...

Drábek, Pavel , Kuliev, Komil , Marletta, Marco
Some criteria for discreteness of spectrum of half-linear fourth order Sturm–Liouville problem

We prove a necessary and sufficient conditions for discreteness of the set of all eigenvalues of half–linear eigenvalue problem with locally integrable weights. Our conditions appear to be equivalent to the compact embedding of certain weighted Sobolev and Lebesgue spaces.

Cibulka, Radek , Dontchev, Asen L. , Veliov, Vladimir M.
Lyusternik-Graves Theorems for the Sum of a Lipschitz Function and a Set-valued Mapping

In a paper of 1950 Graves proved that for a function f acting between Banach spaces and an interior point x in its domain, if there exists a continuous linear mapping A which is surjective and the Lipschitz modulus of the difference f-A at x is sufficiently smal...

Semaničová-Feňovčíková, Andrea , Bača, Martin , Lacsáková, Marcela , Millerová, Miroslava , Ryan, Joe
Wheels are cycle-antimagic

A simple graph G admits an H-covering if every edge in E(G) belongs to a subgraph of G isomorphic to H. An (a, d)-H-antimagic total labeling of a graph G admitting an H-covering is a bijective function from the vertex set V(G) and the edge set E(G) of the&#...

Bača, Martin , Millerová, Miroslava , Ryan, Joe , Semabičová-Feňovčíková, Andrea
On H-antimagicness of disconnected graphs

A simple graph G admits an H-covering if every edge in E(G) belongs to a subgraph of G isomorphic to H. An (a, d)-H-antimagic total labeling of a graph G admitting an H-covering is a bijective function from the vertex set V(G) and the edge set E(G) of the&#...

Abjavay, J. , Kelarev, A.V. , Millerová, Miroslava , Ryan, Joseph
Rees semigroups of digraphs for classification of data

Recent research has motivated the investigation of the weights of ideals in semiring constructions based on semigroups. The present paper introduces Rees semigroups of directed graphs. This new construction is a common generalization of Rees matrix semigroups and incidence semigroups of digr...

Tomiczková, Světlana
Pětiúhelníková pokrytí roviny

Pentagonal tiling is a tiling or tessellation of the plane where each piece (tile) is a pentagon. We describe classification, history and some properties of pentagonal tiling.

Pospíšil, Jan , Sobotka, Tomáš
Market calibration under a long memory stochastic volatility model

In this article, we study a long memory stochastic volatility model (LSV), under which stock prices follow a jump-diffusion stochastic process and its stochastic volatility is driven by a continuous-time fractional process that attains a long memory. LSV model should take into account&#...

Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 1 až 20 z 308