Results 31 to 40 of about 96,433 (236)
Noise Cancellation with Static Mixtures of a Nonstationary Signal and Stationary Noise
EURASIP Journal on Advances in Signal Processing, 2003 We address the problem of cancelling a stationary noise component from its static mixtures with a nonstationary signal of interest. Two different approaches, both based on second-order statistics, are considered. The first is the blind source separation (
Sharon Gannot, Arie Yeredor
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Mathematics, 2023 The definition of geostatistical domains is a stage in the estimation of mineral resources, in which a sample resulting from a mining exploration process is divided into zones that show homogeneity or minimal variation in the main element of interest or ...
Heber Hernández +3 more
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Wavelet Density and Regression Estimators for Functional Stationary and Ergodic Data: Discrete Time
Mathematics, 2022 The nonparametric estimation of density and regression function based on functional stationary processes using wavelet bases for Hilbert spaces of functions is investigated in this paper. The mean integrated square error over adapted decomposition spaces
Sultana DIDI +2 more
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Stationarity, non-stationarity and early warning signals in economic networks [PDF]
Journal of Complex Networks, 2014 Economic integration, globalization and financial crises represent examples of processes whose understanding requires the analysis of the underlying network structure. Of particular interest is establishing whether a real economic network is in a state of (quasi)stationary equilibrium, i.e.
Tiziano Squartini, Diego Garlaschelli
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Quantifying Non-Stationarity with Information Theory
Entropy, 2021 We introduce an index based on information theory to quantify the stationarity of a stochastic process. The index compares on the one hand the information contained in the increment at the time scale τ of the process at time t with, on the other hand ...
Carlos Granero-Belinchón +2 more
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Non-Stationarity in Time-Series Analysis: Modeling Stochastic and Deterministic Trends
Multivariate Behavioral ResearchTime series analysis is increasingly popular across scientific domains. A key concept in time series analysis is stationarity, the stability of statistical properties of a time series.
Oisín Ryan +2 more
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Taking climate change into account: Non‐stationarity in climate drivers of ecological response
Journal of Ecology, 2020 Changes in the global climate system are creating increasingly non‐analogue climate conditions with expectations of non‐stationarity among climate drivers. Decoupling among climate drivers complicates the assessment of ecological response to the changing
Clifton P. Bueno de Mesquita +4 more
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Asymptotic Analysis of Poverty Dynamics via Feller Semigroups
MathematicsPoverty is a multifaceted phenomenon impacting millions globally, defined by a deficiency in both material and immaterial resources, which consequently restricts access to satisfactory living conditions. Comprehensive poverty analysis can be accomplished
Lahcen Boulaasair +2 more
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Mathematics, 2022 In this study, we look at the wavelet basis for the nonparametric estimation of density and regression functions for continuous functional stationary processes in Hilbert space. The mean integrated squared error for a small subset is established.
Sultana Didi, Salim Bouzebda
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Physical Chemistry, Chemical Physics - PCCP, 2014 Modern microscopic techniques following the stochastic motion of labelled tracer particles have uncovered significant deviations from the laws of Brownian motion in a variety of animate and inanimate systems.
R. Metzler +3 more
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