Search Results - subject:"multiresolution"

Wavelet Multiresolution Analysis of High-Frequency FX Rates, Summer 1997

Los, Cornelis A.; Karuppiah, Jeyanthi - School of Economics, University of Adelaide - 2000

between 1.5 and 2. This paper uses wavelet multiresolution analysis, with Haar wavelets, to analyze the nonstationarity (time …

Persistent link: https://www.econbiz.de/10008462901

A recursive procedure to obtain a class of orthogonal polynomial wavelets

Moncayo, M.; Yáñez, R.J. - In: Mathematics and Computers in Simulation (MATCOM) 77 (2008) 2, pp. 266-273

[−1,1] with optimal growth of degrees, Sb. Math. 192 (3) (2001) 433–454; M. Skopina, Multiresolution analysis of periodic … reconstruction formulae which determine the multiresolution analysis framework. From the reconstruction formula, we obtain the …

Persistent link: https://www.econbiz.de/10011051066

Estimation of ApEn for short-term HFECG based on multi-resolution analysis

Xu, Yinlin; Ma, Xiaofei; Ning, Xinbao - In: Physica A: Statistical Mechanics and its Applications 376 (2007) C, pp. 401-408

detail signals with multi-resolution wavelet analysis, and then their ApEn is calculated. A conclusion can be drawn that …

Persistent link: https://www.econbiz.de/10010872090

Multiresolution information measures applied to speech recognition

Torres, María E.; Rufiner, Hugo L.; Milone, Diego H.; … - In: Physica A: Statistical Mechanics and its Applications 385 (2007) 1, pp. 319-332

noisy signals. This is still an open problem in this field. Continuous multiresolution entropy has been shown to be robust … present an extension of the continuous multiresolution entropy to different divergences and we propose them as new dimensions … these continuous multiresolution entropy related measures provide valuable information to the speech recognition system and …

Persistent link: https://www.econbiz.de/10011060337

Refinable interpolatory and quasi-interpolatory operators

Gori, Laura; Pitolli, Francesca; Santi, Elisabetta - In: Mathematics and Computers in Simulation (MATCOM) 75 (2007) 5, pp. 191-199

In this paper, we present a new class of operators, which are refinable, quasi-interpolatory and satisfy some interpolation conditions. The refinability is achieved by using as functional bases the B-bases corresponding to totally positive refinable functions. We analyze the main properties of...

Persistent link: https://www.econbiz.de/10010749488

Structural complexity of disordered surfaces: Analyzing the porous silicon SFM patterns

Rosa, R.R.; Baroni, M.P.M.A.; Zaniboni, G.T.; Ferreira … - In: Physica A: Statistical Mechanics and its Applications 386 (2007) 2, pp. 666-673

This paper introduces a relative structural complexity measure for the characterization of disordered surfaces. Numerical solutions of 2d+1 KPZ equation and scanning force microscopy (SFM) patterns of porous silicon samples are analyzed using this methodology. The results and phenomenological...

Persistent link: https://www.econbiz.de/10010591068

Clustering Using Wavelet Transformation

Almasri, Abdullah; Shukur, Ghazi - Centrum för arbetsmarknadspolitisk forkskning (CAFO), … - 2006

This paper introduces and describes an alternative clustering approach based on the discrete wavelet transform (DWT) which satisfies requirements that other clustering methods, like discriminative-based clustering and model-based clustering approaches, do not satisfy. The clustering method has...

Persistent link: https://www.econbiz.de/10005645254

Self-organizing map clustering based on continuous multiresolution entropy

Torres, H.M.; Gurlekian, J.A.; Rufiner, H.L.; Torres, M.E. - In: Physica A: Statistical Mechanics and its Applications 361 (2006) 1, pp. 337-354

multiresolution entropy tools, Int. J. Bifurc. Chaos 11(4) (2001) 967–981]. The new method takes the advantages of the continuous … multiresolution entropy to localize slight changes in the parameters, and uses self-organizing maps to quantify and cluster these …

Persistent link: https://www.econbiz.de/10010589860

An intuitive guide to wavelets for economists

Crowley, Patrick - EconWPA - 2005

Wavelet analysis, although used extensively in disciplines such as signal processing, engineering, medical sciences, physics and astronomy, has not yet fully entered the economics discipline. In this discussion paper, wavelet analysis is introduced in an intuitive manner, and the existing...

Persistent link: https://www.econbiz.de/10005407945

Decomposing the co-movement of the business cycle: a time- frequency analysis of growth cycles in the eurozone

Crowley, Patrick; Lee, Jim - EconWPA - 2005

This article analyses the frequency components of European business cycles using real GDP by employing multiresolution …

Persistent link: https://www.econbiz.de/10005076732