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Mostrando ítems 1-10 de 2522
Comparison of Frequency Bands Using Spectral Entropy for Epileptic Seizure Prediction
(Universidad de Belgrano - Facultad de Ingeniería y Tecnología Informática - Proyectos de Investigación, 2013)
Under the hypothesis that the uncontrolled neuronal synchronization propagates recruitingmore andmore neurons,
the aim is to detect its onset as early as possible by signal analysis.This synchronization is not noticeable ...
Detecção de plantas daninhas em pré-semeadura com base em dados espectrais de campo
(Universidade Federal de Santa MariaBrasilEngenharia AgrícolaUFSMPrograma de Pós-Graduação em Engenharia AgrícolaCentro de Ciências Rurais, 2019-08-03)
According the concept of precision agriculture and new technologies for agriculture, there were several studies to improve tools at an extremely important stage in crop management, which is the identification and control ...
On a continuous spectral algorithm for simulating non stationary Gaussian random fields
(Springer, 2018)
This paper presents an algorithm for simulating
Gaussian random fields with zero mean and non-stationary
covariance functions. The simulated field is obtained as a
weighted sum of cosine waves with random frequencies
and ...
On a continuous spectral algorithm for simulating non-stationary Gaussian random fields
(Springer New York LLC, 2018)
This paper presents an algorithm for simulating Gaussian random fields with zero mean and non-stationary covariance functions. The simulated field is obtained as a weighted sum of cosine waves with random frequencies and ...
Bridge effect in charge transfer absorption bands. para-substituted benzylideneacetones
(Marcel Dekker Inc., 1996)
The electronic absorption charge transfer bands in a series of para-substituted benzalketones are analyzed in order to stablish the role of the electron-donor substituent as well as the electronic properties of the molecular ...
Improvement of leaf nitrogen content inference in Valencia-orange trees applying spectral analysis algorithms in UAV mounted-sensor images
(Elsevier B.V., 2019-11-01)
Nitrogen is one of the main required nutrients for the production of citrus plants. Farmers have used the chemical analysis of leaf tissue to determine the amount of nitrogen needed in a crop. However, its possible to ...
Spectral simulation of vector random fields with stationary gaussian increments in d-dimensional euclidean spaces
(Springer, 2017)
This paper addresses the problem of simulating multivariate random fields with stationary Gaussian increments in a d-dimensional Euclidean space. To this end, one considers a spectral turning-bands algorithm, in which the ...
An improved spectral turning-bands algorithm for simulating stationary vector Gaussian random fields
(2016)
We propose a spectral turning-bands approach for the simulation of second-order stationary vector Gaussian random fields. The approach improves existing spectral methods through coupling with importance sampling techniques. ...
On confidence bands for time series problems in the time and frequency domains
(Institute of Mathematical Statistics, 2003-12)
The construction of (asymptotic) simultaneous confidence bands for some time series problems is studied, typically for the sample autocorrelogram and windowed spectral density estimate. The following approaches are explored: ...