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Resultats globals: 8 registres trobats en 0.06 segons.
Articles, 8 registres trobats
Articles 8 registres trobats  
1.
28 p, 2.6 MB Detecting outliers in multivariate volatility models : a wavelet procedure / Grané, Aurea (Universidad Carlos III de Madrid. Departamento de Estadística) ; Martín-Barragán, Belén (University of Edinburgh Business Schoo) ; Veiga, Helena (Instituto Universitario de Lisboa)
It is well known that outliers can affect both the estimation of parameters and volatilities when fitting a univariate GARCH-type model. Similar biases and impacts are expected to be found on correlation dynamics in the context of multivariate time series. [...]
2019 - 10.2436/20.8080.02.89
SORT : statistics and operations research transactions, Vol. 43 Núm. 2 (July-December 2019) , p. 289-316  
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2.
20 p, 640.1 KB Selection of Wavelet Basis Function for Image Compression : a Review / Sunkara, Jaya Krishna (Sree Vidyanikethan Engineering College (A.Rangampet, Índia))
Wavelets are being suggested as a platform for various tasks in image processing. The advantage of wavelets lie in its time frequency resolution. The use of different basis functions in the form of different wavelets made the wavelet analysis as a destination for many applications. [...]
2019 - 10.5565/rev/elcvia.1094
ELCVIA : Electronic Letters on Computer Vision and Image Analysis, Vol. 18 Núm. 1 (2019) , p. 1-20 (Regular Issue)  
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3.
31 p, 777.3 KB A numerical estimate of the regularity of a family of Strange non-chaotic Attractors / Alsedà i Soler, Lluís (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Mondelo González, José María (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Romero, David (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
We estimate numerically the regularities of a family of Strange Non-Chaotic Attractors related with one of the models studied in C. Grebogy et al. (1984) (see also G. Keller (1996)). To estimate these regularities we use wavelet analysis in the spirit of R. [...]
2017 - 10.1016/j.physd.2016.12.006
Physica D. Nonlinear phenomena, Vol. 347 (May 2017) , p. 74-89  
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4.
35 p, 421.5 KB On multilinear singular integrals of Calderón-Zygmund type / Grafakos, Loukas (University of Missouri. Department of Mathematics) ; Torres, Rodolfo H. (University of Kansas. Department of Mathematics)
A variety of results regarding multilinear Calderón-Zygmund singular integral operators is systematically presented. Several tools and techniques for the study of such operators are discussed. These include new multilinear endpoint weak type estimates, multilinear interpolation, appropriate discrete decompositions, a multilinear version of Schur's test, and a multilinear version of the T1 Theorem suitable for the study of multilinear pseudodifferential and translation invariant operators. [...]
2002 - 10.5565/PUBLMAT_Esco02_04
Publicacions matemàtiques, Vol. Extra (2002) , p. 57-91  
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5.
21 p, 201.8 KB Sharp growth estimates for dyadic b-input T(b) theorems / Salomone, Stephanie Anne (University of Portland. Department of Mathematics)
The following deals with the T(b) theorems of David, Journé, and Semmes [7] considered in a dyadic setting. We find sharp growth estimates for a global and a local dyadic T(b) Theorem. We use multiscale analysis and Haar wavelets in the local case.
2008 - 10.5565/PUBLMAT_52208_02
Publicacions matemàtiques, V. 52 n. 2 (2008) p. 267-287  
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6.
18 p, 703.5 KB Wavelets and partial differential equations for image denoising / Bruni, Vittoria (Istituto per le Applicazioni del Calcolo "M. Picone" (Roma, Itàlia)) ; Piccoli, Benedetto (Istituto per le Applicazioni del Calcolo "M. Picone" (Roma, Itàlia)) ; Vitulano, Domenico (Istituto per le Applicazioni del Calcolo "M. Picone" (Roma, Itàlia))
In this paper a wavelet based model for image de-noising is presented. Wavelet coefficients are modelled as waves that grow while dilating along scales. The model establishes a precise link between corresponding modulus maxima in the wavelet domain and then allows to predict wavelet coefficients at each scale from the first one. [...]
2006 - 10.5565/rev/elcvia.147
ELCVIA : Electronic Letters on Computer Vision and Image Analysis, V. 6 n. 2 (2006) p. 36-53  
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7.
15 p, 1.3 MB Relevance of multifractal textures in static images / Turiel, Antonio (Air Project - INRIA (Le Chesnay, França))
In the latest years, multifractal analysis has been applied to image analysis. The multifractal framework takes advantage of multiscaling properties of images to decompose them as a collection of different fractal components, each one associated to a singularity exponent (an exponent characterizing the way in which that part of the image evolves under changes in scale). [...]
2002 - 10.5565/rev/elcvia.61
ELCVIA : Electronic Letters on Computer Vision and Image Analysis, V. 1 n. 1 (2002) p. 35-49  
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8.
31 p, 295.3 KB Representació i mostratge de funcions : de les sèries de Fourier a la teoria d'ondetes / Bruna, Joaquim (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
Les ondetes (wavelets en anglès, ondelettes en francès i ondículas en castellà) són una eina matemàtica moderna -apareixen al començament dels vuitanta- que ha protagonitzat una petita revolució en diferents camps del que s'anomena genèricament tractament del senyal: tractament d'imatges i so, enginyeria nuclear, neurofisiologia, imatges mèdiques (tomografies, ressonàncies magnètiques), òptica, geologia, radar, modelitzacions de la visió humana, visió per computador, etc. [...]
1999
Butlletí de la Societat Catalana de Matemàtiques, Vol. 14, N. 1 (1999) , p. 31-62  
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