Random Projection
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Comparison of In-Flight Measured and Computed Aeroelastic Damping: Modal Identification Procedures and Modeling Approaches
ABSTRACT The Operational Modal Analysis technique is a methodology very often applied for the identification of dynamic systems when the input signal is unknown. The applied methodology is based on a technique to estimate the Frequency Response Functions and extract the modal parameters using only the structural dynamic response data, without assuming the kn
J. Aerosp. Technol. Manag.. Publicado em: 2016-06
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2. Soluções aproximadas para algoritmos escaláveis de mineração de dados em domínios de dados complexos usando GPGPU / On approximate solutions to scalable data mining algorithms for complex data problems using GPGPU
The increasing availability of data in diverse domains has created a necessity to develop techniques and methods to discover knowledge from huge volumes of complex data, motivating many research works in databases, data mining and information retrieval communities. Recent studies have suggested that searching in complex data is an interesting research field
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/09/2011
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3. Revisiting privacy preserving clustering by data transformation.
Preserving the privacy of individuals when data are shared for clustering is a complex problem. The challenge is how to protect the underlying data values subjected to clustering without jeopardizing the similarity between objects under analysis. In this short paper, we revisit a family of geometric data transformation methods (GDTMs) that distort numerical
Journal of Information and Data Management. Publicado em: 2011
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4. Tests applied in macroeconomics: exchange rate expectations and inflation / Ensaios aplicados de macroeconomia: taxa de câmbio e expectativas de inflação
This doctoral thesis consists of three essays in applied macroeconomics. The first essay retakes the classic result of the article by Meese and Rogoff (1983), in which the authors found strong evidence that no structural model for the exchange rate surpasses the projections of a random walk model. In this first essay we compare the error of the projections f
Publicado em: 2008
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5. Gestão do valor nas empresas num contexto de risco: estudo de caso de uma empresa do setor não cíclico de alimentos da BOVESPA / Value managment of companies in a risk view: a case study of Bovespa`s aciclic food company
Since the 90th decade, the brazilian economy has passed through many industry privatization. This process has changed in different ways the trends of brazilian economy view, bringing the attention of many investors that dealt a lot with the fusion and acquisition market. In this view the acyclic stock exchange of São Paulo(BOVESPA) is presenting in the last
Publicado em: 2008
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6. Random normal matrices ensembles: projection, asymptotics behavior and universality of ugenvalues / Ensembles de matrizes aleatórias normais: projeção, comportamento assintótico e universalidade dos autovalores
Uma matriz `A IND.N´ de ordem N ´e normal se e somente se comuta com sua adjunta. Nesta tese investigamos a estatística dos autovalores (no plano complexo) de ensembles de matrizes aleatórias normais quando a ordem N destas tende a infinito. A função distribuição de probabilidade no espaço das matrizes normais atribui, como na mecânica estatística
Publicado em: 2008
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7. Continuous usage of cover crops in citrus: influence in seedbank, weeds, and soils chemical characteristics / Uso contínuo de coberturas vegetais em citros: influência no banco de sementes, na comunidade infestante e nas características químicas do solo
In the last few years, the consumers, especially those of the external market, have become more and more interested in food security, namely on what it refers to the means of production. This fact has motivated the search for alternatives of low environmental impact, and one of these is the use cover crops or green manure. In this context the current researc
Publicado em: 2008
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8. A weighted projection centering method
An iterative method for finding the center of a linear programming polytope is presented. The method assumes that we start at a feasible interior point and each iterate is obtained as a convex combination of the orthogonal projection on the half spaces defined by the linear inequalities plus a special projections on the same half spaces. The algorithm is par
Computational & Applied Mathematics. Publicado em: 2003
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9. Estrutura nuclear e competição entre modos de decaimento de ressonancia gigantes
The low-lying leveI structure of the odd-mass Pb isotopes ( 193A205) is investigated in terms of the projected BCS approximation (PBCS) with one- and three- quasiparticle. A surface delta interaction (SDI) is used as residual interaction. Excitation energies, spectroscopic factors magnetic dipole and electric quadrupole moments are calculated and compared wi
Publicado em: 1997
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10. Specific Movement of Cell Membranes Fused with HVJ (Sendai Virus)
When Ehrlich ascites tumor cells fused with UV-inactivated HVJ (Sendai virus) were cultured, the viral envelope antigens, which had been integrated at random into the cell membranes, accumulated at one site on the fused cell. The site showed a specific structure, namely, a projection of the cytoplasm from the spherical fused cell surface with clusters of man
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11. An efficient code for environmental sound classification
An efficient code for classifying environmental sounds is described that exploits a recent significant advance in signal processing known as compressed sensing (CS) [cf.Donoho, D. (2006). IEEE Trans. Inf. Theory 52, 1289–1306]. CS involves a novel approach to sampling in which the salient information in signals is recovered from the projection onto a small
Acoustical Society of America.
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12. Large evoked potentials to dynamic random-dot correlograms and stereograms permit quick determination of stereopsis.
The combination of three technological innovations permits the fast and objective determination of stereopsis in nonverbal subjects: (i) It is shown that dynamic random-dot correlograms (RDC) are as effective as dynamic random-dot stereograms (RDS) in eliciting large evoked potentials (EP), and that the generation of RDC is simpler than that of RDS. (ii) The