Výsledky vyhledávání - "Espais vectorials"

Passive sampling in reproducing kernel Hilbert spaces using leverage scores

Autor: Pere Giménez-Febrer, Alba Pagès-Zamora, Ignacio Santamaría

Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)

This paper deals with the selection of the training dataset in kernel-based methods for function reconstruction, with a focus on kernel ridge regression. A functional analysis is performed which, in the absence of noise, links the optimal sampling di

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b555ef8bbacf5d16e67734c42cd6f2b
https://hdl.handle.net/2117/369614

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Topological quantum field theories

Autor: Baixas Estradé, Jaume

Publikováno v: Dipòsit Digital de la UB
Universidad de Barcelona

Treballs Finals de Grau de Matemàtiques, Facultat de Matemàtiques, Universitat de Barcelona, Any: 2020, Director: Joana Cirici
[en] Topological quantum field theories (TQFTs) are functors from the category of bordisms to the category of vector

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::14d25928b89132cf31147ddd2dd78e1e
http://hdl.handle.net/2445/170569

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Perturbed marked reduced forms of invariant subspaces

Autor: Albert Compta, Josep Ferrer, Marta Peña

Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Recercat. Dipósit de la Recerca de Catalunya
instname

The classification of invariant subspaces is an open problem related to other important ones like the Carlson problem. Here we obtain a reduced form of these invariant subspaces as a new tool to tackle these problems. In particular, it allows us to p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fee4d1646bca622f3ad39e6678f81b28
https://doi.org/10.1016/j.laa.2018.09.009

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On Simultaneously and Approximately Simultaneously Diagonalizable $m$-tuples of Matrices

Autor: Maria Isabel Garcia-Planas

Publikováno v: Volume: 2, Issue: 1 50-55
Fundamental Journal of Mathematics and Applications
Recercat. Dipósit de la Recerca de Catalunya
instname
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)

In this paper, the problem of simultaneous diagonalization of $m$-tuples of $n$-order square complex matrices, is analyzed and some necessary and some necessary and sufficient conditions for this property to be fulfilled are presented. This study has

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9fe5cb91fd3996c6d6221cd441057586
https://dergipark.org.tr/tr/pub/fujma/issue/45834/545064

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Wave diffraction by a cosmic string

Autor: O. M. Bulashenko, Isabel Fernández-Núñez

Publikováno v: Recercat. Dipósit de la Recerca de Catalunya
instname
Dipòsit Digital de la UB
Universidad de Barcelona

We show that if a cosmic string exists, it may be identified through characteristic diffraction pattern in the energy spectrum of the observed signal. In particular, if the string is on the line of sight, the wave field is shown to fit the Cornu spir

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7903cc2faa7f0c91b3a141d3fd8c892c
https://doi.org/10.1016/j.physleta.2016.07.008

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Automatic manhole extraction from MMS data to update basemaps

Autor: Omar Alshaiba, Nieves Lantada, M. Amparo Núñez-Andrés

Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)

Basemaps are the main resource used in urban planning, building and infrastructure asset management. Therefore, they must be accurate and up to date to better serve citizens, contractors, property owners and town planning departments. Traditionally,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8865fbe0b5591a80ce458a1c6eef2539
https://doi.org/10.1016/j.autcon.2020.103110

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Implementation of high frequency SVM in a digital system for CS-SiC inverter

Autor: José Luis Romeral Martínez, Vicent Sala, Alejandro Paredes, Efrén Esteban Fernández Palomeque

Publikováno v: Recercat. Dipósit de la Recerca de Catalunya
instname
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)

The operation of current source inverters at high frequency allows to reduce the size of the input coil and output filters. These advantages allowed to obtain converters with better performance and to reduce the size and weight of the passives elemen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::947ca8c91a3e62189f4a0cc1067ccb60
https://hdl.handle.net/2117/105075

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Some structural properties of a lattice of embedded coalitions

Autor: José María Alonso-Meijide, Mikel Álvarez-Mozos, M. Gloria Fiestras-Janeiro, Andrés Jiménez-Losada

Publikováno v: Recercat. Dipósit de la Recerca de Catalunya
instname
Dipòsit Digital de la UB
Universidad de Barcelona

In this paper we investigate some structural properties of the order on the set of embedded coalitions outlined in the paper de Clippel G. and R. Serrano (2008) “Marginal Contributions and Externalities in the Value.” Econometrica 76: 1413–1436

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::805ce8962d246e838996f3de11dd8ebe
http://hdl.handle.net/2445/113219

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Optimal Sobolev Embeddings in Spaces with Mixed Norm

Autor: Clavero, Nadia F.

Publikováno v: Dipòsit Digital de la UB
Universidad de Barcelona
TDX (Tesis Doctorals en Xarxa)
TDR. Tesis Doctorales en Red
instname

[spa] Este proyecto hace referencia a estimaciones, en espacios funcionales, que relacionan la norma de una función y la de sus derivadas. Concretamente, nuestro principal objetivo es estudiar las estimaciones clásicas de las inclusiones de Sobolev

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::a6d01d976f09c5922ebb371c71a4a82c
http://hdl.handle.net/10803/292613

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De les dades composicionals a una geometria euclidiana sobre el símplex

Autor: Barceló i Vidal, Carles

Publikováno v: Butlletí de la Societat Catalana de Matemàtiques; 26 : núm. 1 (juny 2011); p. 5-28
Recercat. Dipósit de la Recerca de Catalunya
instname
Butlletí de la Societat Catalana de Matemàtiques, 2011, vol. 26, núm. 1, p.5-28
Articles publicats (D-IMA)
DUGiDocs – Universitat de Girona

La reflexió sobre la naturalesa de les dades composicionals i sobre la metodologia estadística específica per a la seva anàlisi condueix a la construcció de l?espai de les composicions i a la seva estructuració com un espai vectorial euclidià,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::f72399fd95e003cafc051ff341731c44
http://www.raco.cat/index.php/ButlletiSCM/article/view/244820

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