Results 31 to 40 of about 183,596 (199)
ON SINGULAR STATIONARITY II (TIGHT STATIONARITY AND EXTENDERS-BASED METHODS) [PDF]
The Journal of Symbolic Logic, 2019 AbstractWe study the notion of tightly stationary sets which was introduced by Foreman and Magidor in [8]. We obtain two consistency results showing that certain sequences of regular cardinals${\langle {\kappa _n}\rangle _{n < \omega }}$can have the property that in some generic extension, every ground-model sequence of fixed-cofinality stationary ...
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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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Cautious Gait during Navigational Tasks in People with Hemiparesis: An Observational Study
SensorsLocomotor and balance disorders are major limitations for subjects with hemiparesis. The Timed Up and Go (TUG) test is a complex navigational task involving oriented walking and obstacle circumvention. We hypothesized that subjects with hemiparesis adopt
Albane Le Roy +4 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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A Wavelet‐Based Test for Stationarity [PDF]
Journal of Time Series Analysis, 2000 We develop a test for stationarity of a time series against the alternative of a time‐varying covariance structure. Using localized versions of the periodogram, we obtain empirical versions of a reasonable notion of a time‐varying spectral density. Coefficients with respect to a Haar wavelet series expansion of such a time‐varying periodogram are an ...
Sachs, Rainer von, Neumann, Michael H.
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Long-run relationship between exports and imports : current account sustainability tests for the EU [PDF]
, 2019 We assess the sustainability of external imbalances for EU countries using panel stationarity tests of Current Account (CA) balance-to-GDP ratios and panel cointegration of exports and imports of goods and services, for the period 1970Q1-2015Q4.
Afonso, António +3 more
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Extreme 1-day rainfall distributions: Analysing change in the Western Cape
South African Journal of Science, 2017 Severe floods in the Western Cape Province of South Africa have caused significant damage to property and infrastructure over the past decade (2003–2014).
Jan H. de Waal +2 more
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On singular stationarity I (mutual stationarity and ideal-based methods) [PDF]
Advances in Mathematics, 2019 We study several ideal-based constructions in the context of singular stationarity. By combining methods of strong ideals, supercompact embeddings, and Prikry-type posets, we obtain three consistency results concerning mutually stationary sets, and answer a question of Foreman and Magidor concerning stationary sequences on the first uncountable ...
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On a Class of Z+-Valued Autoregressive Moving Average (ARMA) Processes
Revstat Statistical Journal, 2008 A convolution semigroup of probability generating functions and its related operator ⊙F are used to construct a class of stationary Z+-valued autoregressive moving average (ARMA) processes.
Emad-Eldin A. A. Aly , Nadjib Bouzar
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Stationarity and quasi-stationarity for birth-death processes [PDF]
SCIENTIA SINICA Mathematica, 2019 Professor Zikun Wang has made pioneering research on the construction theory of birth-death processes, which now has many applications.We review the quasi-stationary distribution for birth-death processes with four types of infinity boundary. In the cases of exit/regular boundaries,we extend the quasi-stationary distributions to the minimal processes ...
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