Results 71 to 80 of about 191,604 (213)
Wavelet Multiresolution Analysis of High-Frequency FX Rates, Summer 1997 [PDF]
FX pricing processes are nonstationary and their frequency characteristics are time-dependent. Most do not conform to geometric Brownian motion, since they exhibit a scaling law with a Hurst exponent between zero and 0.5 and fractal dimensions between 1 ...
Jeyanthi Karuppiah, Cornelis A. Los
core
ANALISIS DEKOMPOSISI WAVELET PADA PENGENALAN POLA LURIK DENGAN METODE LEARNING VECTOR QUANTIZATION
Ilkom Jurnal Ilmiah, 2017 Indonesia merupakan negara yang terdiri dari banyak suku dan adat istiadat. Keragaman budaya di Indonesia juga dapat dilihat dari kerajinan tenun seperti songket dari daerah sumatra, ulos dari daerah batak, dan kain lurik dari daerah jawa tengah.
Bambang Robi'in
doaj +1 more source
Sparse orthogonal matrices and the Haar wavelet
Discrete Applied Mathematics, 2000 The authors discuss the sparsity of orthogonal matrices which have a column of nonzero entries. It is shown that the minimun number of nonzero entries in such a matrix of size \(m\times m\) is \[ (\lfloor m\rfloor +3)m-2^{\lfloor m\rfloor+1}. \] This is optimal, as the paper characterizes the matrices which achieve this number.
Gi-Sang Cheon, Bryan L. Shader
openaire +1 more source
Hilbert Transform Pairs of Wavelets
Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.ABSTRACT The orthogonal projection of a real orthonormal wavelet basis onto the Hardy space—consisting of functions whose Fourier transform is supported only on the positive real axis—yields a Parseval frame of wavelets. Motivated by practical considerations, Kingsbury proposed the use of two real scaling functions from multiresolution analyses (MRAs ...
Moritz Proell
wiley +1 more source
The Wavelet-based Estimation for Long Memory Signal Plus Noise Models [PDF]
We propose new wavelet-based procedure to estimate the memory parameter of an unobserved process from an observed process affected by noise in order to improve the performance of the estimator by taking into account the dependency of the wavelet ...
Kei Nanamiya
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Wavelets obtained by continuous deformations of the Haar wavelet
Revista Matemática Iberoamericana, 1996 One might obtain the impression, from the wavelet literature, that the class of orthogonal wavelets is divided into subclasses, like compactly supported ones on one side, band-limited ones on the other side. The main purpose of this work is to show that, in fact, the class of low-pass filters associated with "reasonable" (in the localization sense, not
Bonami, Aline +2 more
openaire +3 more sources
Magnetic Resonance in Medicine, Volume 96, Issue 5, Page 2489-2504, November 2026.ABSTRACT Purpose To improve the accuracy of diffusion‐weighted powder average signals for diffusion encoding with arbitrary b‐tensors. Methods We identify an intrinsic dihedral (D2) symmetry of diffusion signals for arbitrary diffusion encoding, which defines their natural signal space (a quotient of 3D rotations). Based on this, we propose a method to
Sune Nørhøj Jespersen +1 more
wiley +1 more source
On the block wavelet transform applied to the boundary element method [PDF]
, 2004 This paper follows an earlier work by Bucher et al. [1] on the application of wavelet transforms to the boundary element method, which shows how to reuse models stored in compressed form to solve new models with the same geometry but arbitrary load cases
Bucher, HF +3 more
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A conversation with James V. Zidek
Canadian Journal of Statistics, Volume 54, Issue 3, September 2026.Abstract This article documents a series of exchanges between the authors and the senior Canadian statistician Jim Zidek in early 2026. The interview traces his life trajectory, surveying his principal contributions to statistics while offering insights into his motivations, successes, and challenges.
Christian Genest, Nancy E. Heckman
wiley +1 more source