Browsing Τμήμα Μαθηματικών και Στατιστικής / Department of Mathematics and Statistics by Title
Now showing items 1500-1519 of 1633
-
Article
Tapered block bootstrap
(2001)We introduce and study tapered block bootstrap methodology that yields an improvement over the well-known block bootstrap for time series of Künsch (1989). The asymptotic validity and the favourable bias properties of the ...
-
Book Chapter
-
Book
-
Article
Technical Notes and Correspondence: Robust Adaptive LQ Control Schemes
(1992)The certainty equivalence principle is used to combine a robust adaptive law with a control structure derived from the linear quadratic (LQ) control problem. The resulting adaptive control scheme is applicable to minimum ...
-
Article
Tentative study of flow patterns in the North Aegean Sea using NOAA-AVHRR images and 2D model simulation
(1996)A statistical technique for image processing, the maximum cross correlation (MCC) method, was utilized on sequences of NOAA-AVHRR thermal data in order to explore the surface advective current dynamics at the discharge ...
-
Article
Terminal 3-fold divisorial contractions of a surface to a curve I
(2004)Let Γ ⊂ X be a smooth curve on a 3-fold which has only index 1 terminal singularities along Γ. In this paper we investigate the existence of extremal terminal divisorial contractions E ⊂ Y → ⊂ X, contracting an irreducible ...
-
Article
Testing equality of autocovariance operators for functional time series
(2020)We consider strictly stationary stochastic processes of Hilbert space-valued random variables and focus on fully functional tests for the equality of the lag-zero autocovariance operators of several independent functional ...
-
Book
Testing equality of spectral densities
(Univ., SFB 475Univ., SFB 475, 2007)
-
Article
Testing equality of spectral density operators for functional linear processes
(2018)The problem of testing equality of the entire second order structure of two independent functional linear processes is considered. A fully functional L2-type test is developed which evaluates, over all frequencies, the ...
-
Article
Testing for additivity and joint effects in multivariate nonparametric regression using Fourier and wavelet methods
(2004)We consider the problem of testing for additivity and joint effects in multivariate nonparametric regression when the data are modelled as observations of an unknown response function observed on a d-dimensional (d ≥ 2) ...
-
Article
Testing independence for multivariate time series via the auto-distance correlation matrix
(2018)SUMMARY. We introduce the matrix multivariate auto-distance covariance and correlation functions for time series, discuss their interpretation and develop cons
-
Article
Testing temporal constancy of the spectral structure of a time series
(2009)Statistical inference for stochastic processes with time-varying spectral characteristics has received considerable attention in recent decades. We develop a nonparametric test for stationarity against the alternative of ...
-
Article
Testing the fit of a vector autoregressive moving average model
(2005)A new procedure for testing the fit of multivariate time series model is proposed. The method evaluates in a certain way the closeness of the sample spectral density matrix of the observed process to the spectral density ...
-
Article
Testing Time Series Linearity. Traditional and Bootstrap Methods
(2012)We review the notion of time series linearity and describe recent advances in linearity and Gaussianity testing via data resampling methodologies. Many advances have been made since the first published tests of linearity ...
-
Article
TFT-bootstrap: Resampling time series in the frequency domain to obtain replicates in the time domain
(2011)A new time series bootstrap scheme, the time frequency toggle (TFT)- bootstrap, is proposed. Its basic idea is to bootstrap the Fourier coefficients of the observed time series, and then to back-transform them to obtain a ...
-
Article
Theory and design of robust direct and indirect adaptive-control schemes
(1988)A general approach for designing and the theory for analysing robust direct and indirect adaptive-control schemes for continuous-time plants is presented. The design approach involves the development of a general robust ...
-
Article
Thin films: Increasing the complexity of the model
(2012)Thin films arise in a variety of contexts. They can be between two solid surfaces in the form of a lubricant or with one surface solid and the other free as in water or oil on a road. When the surface tension is a dominant ...
-
Article
Third annual European rheology conference (AERC 2006), Hersonisos, Crete, Greece, 27-29 April 2006
(2007)
-
Article
Thixotropic flow past a cylinder
(2014)We study the flow of a thixotropic fluid around a cylinder. The rheology of the fluid is described by means of a structural viscoplastic model based on the Bingham constitutive equation, regularised using the Papanastasiou ...
-
Article
Three dimensional divisorial extremal neighborhoods
(2005)In this paper we study divisorial extremal neighborhoods [InlineMediaObject not available: see fulltext.] such that 0 X is a cA n type threefold terminal singularity, and Γ=f(E) is a smooth curve, where E is the f-exceptional ...