Search Results - subject:"decomposition."

Parallel Monte Carlo algorithms for information retrieval

Alexandrov, V.N.; Dimov, I.T.; Karaivanova, A.; Tan, C.J.K. - In: Mathematics and Computers in Simulation (MATCOM) 62 (2003) 3, pp. 289-295

In any data mining applications, automated text and text and image retrieval of information is needed. This becomes essential with the growth of the Internet and digital libraries. Our approach is based on the latent semantic indexing (LSI) and the corresponding term-by-document matrix suggested...

Persistent link: https://www.econbiz.de/10011051194

Low-dimensional dynamical system model for observed coherent structures in ocean satellite data

López, Cristóbal; Hernández-Garcı́a, Emilio - In: Physica A: Statistical Mechanics and its Applications 328 (2003) 1, pp. 233-250

paper combines the power of the Proper Orthogonal Decomposition (POD) technique to identify these coherent structures in …

Persistent link: https://www.econbiz.de/10011058356

Hierarchical algorithms for discounted and weighted Markov decision processes

Abbad, M.; Daoui, C. - In: Mathematical Methods of Operations Research 58 (2003) 2, pp. 237-245

criteria. In [1] the authors considered some decomposition of limiting average MDPs. In this paper, we use an analogous … approach for discounted and weighted MDPs. Then, we construct some hierarchical decomposition algorithms for both discounted …

Persistent link: https://www.econbiz.de/10010950012

Putting relative complexity estimates to work: a simple and general statistical methodology

Trulla, Lluis nindexLligonaLligoña; Zbilut, Joseph P.; … - In: Physica A: Statistical Mechanics and its Applications 319 (2003) C, pp. 591-600

Derivation of a general “distance-from-randomness” index for time series scaling with the relative complexity of an unknown generating system is presented. This index (SVSEn) corresponds to the Shannon entropy of the distribution of the eigenvalues of the correlation matrix derived by the...

Persistent link: https://www.econbiz.de/10011062822

Spinodal decomposition in polycrystalline alloys

Ramanarayan, H.; Abinandanan, T.A. - In: Physica A: Statistical Mechanics and its Applications 318 (2003) 1, pp. 213-219

We have used a phase field model (a continuum equivalent of the Potts model) for studying spinodal decomposition (SD … grain boundary energies γgb of A-rich α and B-rich β phases. When γgbα<γgbβ, the decomposition process is initiated with the …. During this decomposition process, grain growth is suppressed completely due to the pinning effect of the A-rich layer at the …

Persistent link: https://www.econbiz.de/10011064444

Swimming Upstream, Floating Downstream: Comparing Women's Relative Wage Position in the U.S. and Denmark

Gupta, Nabanita Datta; Oaxaca, Ronald L.; Smith, Nina - Institute for the Study of Labor (IZA) - 2003

Longitudinal Sample data. Using a new decomposition method, we show that changes in returns to observable skills and ranking …

Persistent link: https://www.econbiz.de/10005763716

Constructing fixed rank optimal estimators with method of best recurrent approximations

Torokhti, Anatoli; Howlett, Phil - In: Journal of Multivariate Analysis 86 (2003) 2, pp. 293-309

We propose a new approach which generalizes and improves principal component analysis (PCA) and its recent advances. The approach is based on the following underlying ideas. PCA can be reformulated as a technique which provides the best linear estimator of the fixed rank for random vectors. By...

Persistent link: https://www.econbiz.de/10005106979

FUNCTIONAL APPROXIMATION IN MULTISCALE COMPLEX SYSTEMS

CAPOBIANCO, ENRICO - In: Advances in Complex Systems (ACS) 06 (2003) 02, pp. 177-204

One common approach for exploring, approximating and estimating complex system dynamics refers to models based on elementary or atomic building block components of easier interpretation and efficient computation. We adopt a combination of wavelets, greedy approximation and subspace techniques to...

Persistent link: https://www.econbiz.de/10005080917

Strongly Consistent Determination of the Rank of Matrix

Ratsimalahelo, Zaka - EconWPA - 2003

In this paper, we develop methods of the determination of the rank of random matrix. Using the matrix perturbation theory to construct or find a suitable bases of the kernel (null space) of the matrix and to determine the limiting distribution of the estimator of the smallest singular values. We...

Persistent link: https://www.econbiz.de/10005062540

A queueing system with linear repeated attempts, bernoulli schedule and feedback

Atencia, I.; Moreno, P. - In: TOP: An Official Journal of the Spanish Society of … 11 (2003) 2, pp. 285-310

Persistent link: https://www.econbiz.de/10005598364