Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Milvia Rossini"'
Autor:
Milvia Rossini, B Bacchelli
We consider shift-invariant multiresolution spaces generated by q-elliptic splines in $${\mathbb {R}^{d}},d\ge 2,$$ which are tempered distributions characterized by a complex-valued elliptic homogeneous polynomial q of degree $$m>d$$ . To construct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c1d6e3be41c1f3b1a7ae0be0b15367d
http://hdl.handle.net/10281/358351
http://hdl.handle.net/10281/358351
Accurate interpolation and approximation techniques for functions with discontinuities are key tools in many applications, such as medical imaging. In this paper, we study a radial basis function type of method for scattered data interpolation that i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed49a26ec4f93a8b15f930d2372595a1
http://hdl.handle.net/11577/3335134
http://hdl.handle.net/11577/3335134
We discuss several approaches involving the reconstruction of discontinuous one-dimensional functions using parameter-dependent multiquadric radial basis function (MQ-RBF) local interpolants combined with weighted essentially non-oscillatory (WENO) t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::571290b8009d8594d6f58de75af91c22
http://hdl.handle.net/10281/292966
http://hdl.handle.net/10281/292966
Publikováno v:
Journal of Scientific Computing. 79:321-344
We investigate adaptivity issues for the approximation of Poisson equations via radial basis function-based partition of unity collocation. The adaptive residual subsampling approach is performed with quasi-uniform node sequences leading to a flexibl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37aa00bd9ff72d43bfc94ed141397a01
https://doi.org/10.1007/s10915-018-0851-2
https://doi.org/10.1007/s10915-018-0851-2
Publikováno v:
Advances in Computational Mathematics. 44:1003-1040
The aim of the paper is to construct a multiresolution analysis of L2(IRd) based on generalized kernels which are fundamental solutions of differential operators of the form $\boldsymbol {\prod }_{\ell = 1}^{m}(-{\Delta }+\kappa _{\ell }^{2}\,I)$ . W
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f9500669490d424574883585024d847
https://doi.org/10.1007/s10444-017-9571-7
https://doi.org/10.1007/s10444-017-9571-7
Edge detection is a widely used tool in signal/image processing with the aim of identifying abrupt changes or discontinuities in a signal/digital image. For the detection of jump discontinuities in 1D problems, we present an iterative method based on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1142ba14796f6d21869b8f659d779f1c
http://hdl.handle.net/11585/646381
http://hdl.handle.net/11585/646381
Autor:
Elena Volontè, Milvia Rossini
Publikováno v:
Applied Mathematics and Computation. 272:223-234
In this paper we discuss the problem of approximating data given on hexagonal lattices. The construction of continuous representation from sampled data is an essential element of many applications as, for instance, image resampling, numerical solutio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08e7ac0eeec1ec49c60b19ff084d19ab
https://doi.org/10.1016/j.amc.2015.07.119
https://doi.org/10.1016/j.amc.2015.07.119
Autor:
S. De Marchi, Milvia Rossini, G. Astorino, Paola Caramaschi, Cristian Caimmi, Eugenia Bertoldo
Publikováno v:
Saturday, 16 JUNE 2018.
Background It is well known that systemic sclerosis (SSc) affects microvessels, but data on macrovascular involvement are still lacking or debatable. Objectives Aim of this study was to estimate the prevalence of atherosclerotic plaques and their pos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::787abe6bf2fb14c8ebd60dc925dfc710
https://doi.org/10.1136/annrheumdis-2018-eular.3929
https://doi.org/10.1136/annrheumdis-2018-eular.3929
Like the continuous shearlet transform and their relatives, discrete transformations based on the interplay between several filterbanks with anisotropic dilations provide a high potential to recover directed features in two and more dimensions. Due t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37a93c24ac03c1fcd83e702f8716a704
http://arxiv.org/abs/1803.06902
http://arxiv.org/abs/1803.06902
Publikováno v:
Advances in Computational Mathematics. 41:709-726
In order to handle directional singularities, standard wavelet approaches have been extended to the concept of discrete shearlets in Kutyniok and Sauer (SIAM J. Math. Anal. 41, 1436---1471, 2009). One disadvantage of this extension, however, is the r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a5e272d1f72d26a2d0121b8e40ea15e
https://doi.org/10.1007/s10444-014-9384-x
https://doi.org/10.1007/s10444-014-9384-x