ITAT 2014. Information Technologies - Applications and Theory. Part I
Kůrková, Věra; Bajer, Lukáš
2014 - anglický ITAT 2014. Information Technologies - Applications and Theory. Part I. Prague : Institute of Computer Science AS CR, 2014. 101 p. ISBN 978-80-87136-18-8. This volume is the first part of the two-volume proceedings of the 14th conference Information Technologies – Applications and Theory (ITAT 2014). The conference was held in Jasná, Demänovská Dolina, Slovakia, on September 25–29, 2014. ITAT is a computer science conference with the primary goal of exchanging information on recent research results between Czech and Slovak scientific communities, and it presents a platform for young researchers and PhD students to start new collaborations. This year, it was held in parallel with two collocated conferences Datakon and Znalosti with which it shared some invited plenary talks and a poster session. Overall, 51 papers were submitted to all conference tracks. This volume presents 16 papers of the main track, which were selected by the program committee based on at least two reviews by the program committee members. Papers from the three workshops and extended abstracts of posters are included in the second volume. Klíčová slova: computer science; machine-learning; computer linguistics; data-mining; bio-informatics; parallel processing Plné texty jsou dostupné na vyžádání prostřednictvím repozitáře Akademie věd. ITAT 2014. Information Technologies - Applications and Theory. Part I

ITAT 2014. Information Technologies - Applications and Theory. Part I. Prague : Institute of Computer Science AS CR, 2014. 101 p. ISBN 978-80-87136-18-8. This volume is the first part of the ...

Kůrková, Věra; Bajer, Lukáš
Ústav informatiky, 2014

Projekt GAMMA - Analýza trendu ve spotřebě
Konár, Ondřej; Brabec, Marek; Kasanický, Ivan; Malý, Marek; Pelikán, Emil
2014 - český Zpráva obsahuje analýzu trendu ve spotřebě zemního plynu s využitím fakturačních dat ze zákaznického kmene distribuční společnosti RWE GasNet, s.r.o. Cílem analýzy bylo ověřt hypotézu o klesajícím trendu spotřeby zákazníkù s měřením typu C, tj. kategorií domácnost a maloodběr. Pro analýzu byla použita fakturační data všech zákazníků RWE za období 2007 až 2013. Klíčová slova: zemní plyn; trend; typové diagramy dodávky Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Projekt GAMMA - Analýza trendu ve spotřebě

Zpráva obsahuje analýzu trendu ve spotřebě zemního plynu s využitím fakturačních dat ze zákaznického kmene distribuční společnosti RWE GasNet, s.r.o. Cílem analýzy bylo ověřt hypotézu o klesajícím ...

Konár, Ondřej; Brabec, Marek; Kasanický, Ivan; Malý, Marek; Pelikán, Emil
Ústav informatiky, 2014

Inconspicuous Appeal of Amorphous Computing Systems
Wiedermann, Jiří
2014 - anglický Amorphous computing systems typically consist of myriads of tiny simple processors that are randomly distributed at fixed positions or move randomly in a confined volume. The processors are “embodied” meaning that each of them has its own source of energy, has a “body” equipped with various sensors and communication means and has a computational control part. Initially, the processors have no identifiers and from the technological reasons, in the interest of their maximal simplicity, their computational, communication, sensory and locomotion (if any) parts are reduced to an absolute minimum. The processors communicate wirelessly, e.g., in an airborne medium they communicate via a short-range radio, acoustically or optically and in a waterborne medium via molecular communication. In the extreme cases the computational part of the processors can be simplified down to probabilistic finite state automata or even combinatorial circuits and the system as a whole can still be made universally programmable. From the theoretical point of view the structure and the properties of the amorphous systems qualify them among the simplest (non-uniform) universal computational devices. From the practical viewpoint, once technology will enable a mass production of the required processors a host of new applications so far inaccessible to classical approaches to computing will follow. Klíčová slova: amorphous computing; computational universality; computational complexity Plné texty jsou dostupné na vyžádání prostřednictvím repozitáře Akademie věd. Inconspicuous Appeal of Amorphous Computing Systems

Amorphous computing systems typically consist of myriads of tiny simple processors that are randomly distributed at fixed positions or move randomly in a confined volume. The processors are “embodied” ...

Wiedermann, Jiří
Ústav informatiky, 2014

Highly Robust Estimation of the Autocorrelation Coefficient
Kalina, Jan; Vlčková, Katarína
2014 - anglický The classical autocorrelation coefficient estimator in the time series context is very sensitive to the presence of outlying measurements in the data. This paper proposes several new robust estimators of the autocorrelation coefficient. First, we consider an autoregressive process of the first order AR(1) to be observed. Robust estimators of the autocorrelation coefficient are proposed in a straightforward way based on robust regression. Further, we consider the task of robust estimation of the autocorrelation coefficient of residuals of linear regression. The task is connected to verifying the assumption of independence of residuals and robust estimators of the autocorrelation coefficient are defined based on the Durbin-Watson test statistic for robust regression. The main result is obtained for the implicitly weighted autocorrelation coefficient with small weights assigned to outlying measurements. This estimator is based on the least weighted squares regression and we exploit its asymptotic properties to derive an asymptotic test that the autocorrelation coefficient is equal to 0. Finally, we illustrate different estimators on real economic data, which reveal the advantage of the approach based on the least weighted squares regression. The estimator turns out to be resistant against the presence of outlying measurements. Klíčová slova: time series; autoregressive process; linear regression; robust econometrics Plné texty jsou dostupné na vyžádání prostřednictvím repozitáře Akademie věd. Highly Robust Estimation of the Autocorrelation Coefficient

The classical autocorrelation coefficient estimator in the time series context is very sensitive to the presence of outlying measurements in the data. This paper proposes several new robust estimators ...

Kalina, Jan; Vlčková, Katarína
Ústav informatiky, 2014

Representations of Boolean Functions by Perceptron Networks
Kůrková, Věra
2014 - anglický Limitations of capabilities of shallow perceptron networks are investigated. Lower bounds are derived for growth of numbers of units and sizes of output weights in networks representing Boolean functions of d variables. It is shown that for large d, almost any randomly chosen Boolean function cannot be tractably represented by shallow perceptron networks, i.e., each its representation requires a network with number of units or sizes of output weights depending on d exponentially Klíčová slova: perceptron networks; model complexity; Boolean functions Plné texty jsou dostupné v digitálním repozitáři Akademie Věd. Representations of Boolean Functions by Perceptron Networks

Limitations of capabilities of shallow perceptron networks are investigated. Lower bounds are derived for growth of numbers of units and sizes of output weights in networks representing Boolean ...

Kůrková, Věra
Ústav informatiky, 2014

Prediction diagnostics for Uncertain Systems
Novák, M.; Votruba, Z.; Brandejský, T.; Faber, J.; Coufal, David; Pelikán, Emil
2014 - anglický Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Prediction diagnostics for Uncertain Systems

Novák, M.; Votruba, Z.; Brandejský, T.; Faber, J.; Coufal, David; Pelikán, Emil
Ústav informatiky, 2014

A Weather Risk Prediction System for Road Trip Planning
Krč, Pavel; Fuglík, Viktor; Juruš, Pavel; Kasanický, Ivan; Konár, Ondřej; Pelikán, Emil; Eben, Kryštof; Šucha, M.
2014 - anglický The paper presents first ideas of the MEDARD-RODOS project. The aim of the project is to develop a decision support system for road trip planning, reflecting the weather risks predicted from the NWP models implemented in the MEDARD system (www.medard-online.cz) and using the traffic information from the RODOS project (www.centrum-rodos.cz). Klíčová slova: weather; prediction; risk; system; road; planning; MEDARD; RODOS; NWP Plné texty jsou dostupné na vyžádání prostřednictvím repozitáře Akademie věd. A Weather Risk Prediction System for Road Trip Planning

The paper presents first ideas of the MEDARD-RODOS project. The aim of the project is to develop a decision support system for road trip planning, reflecting the weather risks predicted from the NWP ...

Krč, Pavel; Fuglík, Viktor; Juruš, Pavel; Kasanický, Ivan; Konár, Ondřej; Pelikán, Emil; Eben, Kryštof; Šucha, M.
Ústav informatiky, 2014

Noise revealing in Golub-Kahan bidiagonalization as a mean of regularization in discrete inverse problems
Kubínová, Marie; Hnětynková, Iveta
2014 - anglický Klíčová slova: ill-posed problems; regularization; Krylov subspace Plné texty jsou dostupné v digitálním repozitáři NUŠL Noise revealing in Golub-Kahan bidiagonalization as a mean of regularization in discrete inverse problems

Kubínová, Marie; Hnětynková, Iveta
Ústav informatiky, 2014

On three equivalent methods for parameter estimation problem based on spatio-temporal FRAP data
Matonoha, Ctirad; Papáček, Š.
2014 - anglický Klíčová slova: inverse problem formulation; Tikhonov regularizaton; least-squares problem Plné texty jsou dostupné v digitálním repozitáři NUŠL On three equivalent methods for parameter estimation problem based on spatio-temporal FRAP data

Matonoha, Ctirad; Papáček, Š.
Ústav informatiky, 2014

Porovnání výstupů dvou posledních verzí modelu TDD za plynárenský rok 2013/2014
Konár, Ondřej; Brabec, Marek; Kasanický, Ivan; Malý, Marek; Pelikán, Emil
2014 - český Ve zprávě je porovnána přesnost dvou posledních verzí modelu TDD, a to verze 3.4 a 3.5 za plynárenský rok 2013/2014, tj. za období 1.10.2013 až 30.9.2014. Porovnání bylo provedeno dle metodiky popsané ve výzkumné zprávě č. 1138 z roku 2011 s využitím kmenových dat distribuční společnosti RWE GasNet. Klíčová slova: typové diagramy dodávky; zemní plyn; pravidla trhu s plynem Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Porovnání výstupů dvou posledních verzí modelu TDD za plynárenský rok 2013/2014

Ve zprávě je porovnána přesnost dvou posledních verzí modelu TDD, a to verze 3.4 a 3.5 za plynárenský rok 2013/2014, tj. za období 1.10.2013 až 30.9.2014. Porovnání bylo provedeno dle metodiky ...

Konár, Ondřej; Brabec, Marek; Kasanický, Ivan; Malý, Marek; Pelikán, Emil
Ústav informatiky, 2014