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Wyszukujesz frazę "Fernández, Fernando" wg kryterium: Autor


Wyświetlanie 1-6 z 6
Tytuł:
Oligodendrorhynchus hesperides gen. et sp. n. (Heteronemertea) from the Bellingshausen Sea
Autorzy:
Fernández-Alvarez, Fernando Ángel
Anadón, Nuria
Powiązania:
https://bibliotekanauki.pl/articles/2051483.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctic
Nemertea
branched proboscis
Oligodendrorhynchus
Źródło:
Polish Polar Research; 2012, 1; 81-98
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Discrete uncertainty quantification for offline reinforcement learning
Autorzy:
Pérez Torres, Jose Luis
Corrochano Jiménez, Javier
García, Javier
Majadas, Rubén
Ibañez-Llano, Cristina
Pérez, Sergio
Fernández, Fernando
Powiązania:
https://bibliotekanauki.pl/articles/23944835.pdf
Data publikacji:
2023
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
off-line reinforcement learning
uncertainty quantification
machine learning
Opis:
In many Reinforcement Learning (RL) tasks, the classical online interaction of the learning agent with the environment is impractical, either because such interaction is expensive or dangerous. In these cases, previous gathered data can be used, arising what is typically called Offline RL. However, this type of learning faces a large number of challenges, mostly derived from the fact that exploration/exploitation trade-off is overshadowed. In addition, the historical data is usually biased by the way it was obtained, typically, a sub-optimal controller, producing a distributional shift from historical data and the one required to learn the optimal policy. In this paper, we present a novel approach to deal with the uncertainty risen by the absence or sparse presence of some state-action pairs in the learning data. Our approach is based on shaping the reward perceived from the environment to ensure the task is solved. We present the approach and show that combining it with classic online RL methods make them perform as good as state of the art Offline RL algorithms such as CQL and BCQ. Finally, we show that using our method on top of established offline learning algorithms can improve them.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2023, 13, 4; 273--287
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reiteration and a Wolff theorem for interpolation methods defined by means of polygons
Autorzy:
Cobos, Fernando
Fernandez-Martinez, Pedro
Powiązania:
https://bibliotekanauki.pl/articles/1293179.pdf
Data publikacji:
1992
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:
We prove a reiteration theorem for interpolationmethods defined by means of polygons, and a Wolff theorem for the case when the polygon has 3 or 4 vertices. In particular, we establish a Wolff theorem for Fernandez' spaces, which settles a problem left over in [5].
Źródło:
Studia Mathematica; 1992, 102, 3; 239-256
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interpolation of the measure of non-compactness by the real method
Autorzy:
Cobos, Fernando
Fernández-Martínez, Pedro
Martínez, Antón
Powiązania:
https://bibliotekanauki.pl/articles/1217145.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:
We investigate the behaviour of the measure of non-compactness of an operator under real interpolation. Our results refer to general Banach couples. An application to the essential spectral radius of interpolated operators is also given.
Źródło:
Studia Mathematica; 1999, 135, 1; 25-38
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the dependence of parameters in the equivalence theorem for the real method
Autorzy:
Cobos, Fernando
Fernández-Cabrera, Luz María
Karadzhov, Georgi E.
Kühn, Thomas
Powiązania:
https://bibliotekanauki.pl/articles/745875.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Real interpolation
K-functional
J-functional
p-normed spaces.
Opis:
We determine the exact dependence on \(\theta,q,p\) of the constants in the equivalence theorem for the real interpolation method \((A_0,A_1)_{\theta,q}\) with pairs of \(p\)-normed spaces.
Źródło:
Commentationes Mathematicae; 2015, 55, 2
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal support design for galleries located in poor quality rock mass and under the influence of mining works
Autorzy:
Vazquez-Silva, Daniel
Prendes-Gero, Maria-Belen
Álvarez-Fernández, Martina-Inmaculada
González-Nicieza, Celestino
Laín-Huerta, Carlos
López-Gayarre, Fernando
Powiązania:
https://bibliotekanauki.pl/articles/1853849.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
beton natryskowy
śruba
łuk stalowy
support design
back analysis
numerical implementation
bolt
shotcrete
yieldable steel arch
Opis:
In this work, the sup port of two general galleries located in poor quality rock mass and subjected to the influence of high thickness coal layer exploitations is designed and optimized. The process is carried out in four phases:A first preliminary support is defined employing different geomechanical classifications and applying the New Austrian Tunnelling Method (NATM) using bolts and shotcrete.An instrumentation campaign is carried out with the goal of analysing the behaviour of the support. The study noticed the failure of the support due to the time of placement of the different elements.A back-analysis using the Flac and Phases software has allowed the evaluation of the properties of the rock mass and the support, the study of the influence of the time of placement on the component elements (bolts and shotcrete), and the redefinition of that support.Subsequently, a new support is designed and optimized through numerical modeling after the start of mining without experience in these sizes of sublevel caving that caused the failure of the previously designed support. The new support is formed by yieldable steel arches that are more suitable to withstand the stresses generated by nearby mining work.
Źródło:
Archives of Mining Sciences; 2020, 65, 4; 851-867
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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