Browsing Τμήμα Μαθηματικών και Στατιστικής / Department of Mathematics and Statistics by Title
Now showing items 626-645 of 1633
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Article
K-sample subsampling in general spaces: The case of independent time series
(2010)The problem of subsampling in two-sample and K-sample settings is addressed where both the data and the statistics of interest take values in general spaces. We focus on the case where each sample is a stationary time ...
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Article
Kansa RBF method for nonlinear problems
(2018)We apply the Kansa–radial basis function (RBF) collocation method to two– dimensional nonlinear boundary value problems. The system of nonlinear equations resulting from the Kansa–RBF discretization is solved by directly ...
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Article
A Kansa-Radial Basis Function Method for Elliptic Boundary Value Problems in Annular Domains
(2015)We employ a Kansa-radial basis function (RBF) method for the numerical solution of elliptic boundary value problems in annular domains. This discretization leads, with an appropriate selection of collocation points and for ...
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Article
Kansa-RBF algorithms for elliptic problems in axisymmetric domains
(2016)We employ a Kansa-radial basis function method for the numerical solution of elliptic boundary value problems in three-dimensional axisymmetric domains. We consider problems governed by the Poisson equation, the inhomogeneous ...
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Kansa-RBF algorithms for elliptic problems in regular polygonal domains
(2018)We propose matrix decomposition algorithms for the efficient solution of the linear systems arising from Kansa radial basis function discretizations of elliptic boundary value problems in regular polygonal domains. These ...
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Conference Object
A Kansa-RBF method for Poisson problems in annular domains
(WITPress, 2014)We employ a Kansa-radial basis function (RBF) method for Poisson boundary value problems in annular domains. This discretization leads, for any choice of RBF, to linear system matrices possessing block circulant structures. ...
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Article
Kernel estimates of nonparametric functional autoregression models and their bootstrap approximation
(2017)This paper considers a nonparametric functional autoregression model of order one. Existing contributions addressing the problem of functional time series prediction have focused on the linear model and literatures are ...
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Article
A Kolmogorov inequality for U-statistics based on Bernoulli kernels
(1994)A Kolmogorov inequality for the class of U-statistics based on kernels which are Bernoulli random variables is presented. This class of statistics contains the sample average of i.i.d. Bernoulli random variables as a special ...
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Article
L1-Adaptive control: Stability, robustness, and interpretations
(2014)An adaptive control design approach that involves the insertion of a strictly proper stable filter at the input of standard Model Reference Adaptive Control (MRAC) schemes has been proposed in the recent years. This approach ...
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Article
L2-approximations of power and logarithmic functions with applications to numerical conformal mapping
(2002)For a bounded Jordan domain G with quasiconformal boundary L, two-sided estimates are obtained for the error in best L2(G) polynomial approximation to functions of the form (z - τ)β, β > -1, and (z - τ)m logl(z - τ), m > ...
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Article
Laminar axisymmetric flow of a weakly compressible viscoelastic fluid
(2012)The combined effects of weak compressibility and viscoelasticity in steady, isothermal, laminar axisymmetric Poiseuille flow are investigated. Viscoelasticity is taken into account by employing the Oldroyd-B constitutive ...
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Article
Laminar jets of Bingham-plastic liquids
(1990)The steady and transient behavior of jets generated by circular and slit nozzles are analyzed by the Galerkin finite-element method with free-surface parametrization and Newton iteration. A novel constitutive equation is ...
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Article
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Conference Object
Lane change guidance for freeway incident management
(2009)This study proposes a design and evaluation method of lane change guidance system for freeway incident management. Microscopic simulator VISSIM is used to facilitate the design and evaluation. Sixteen incident scenarios ...
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Article
The Laplace equation with discontinuous boundary data: Convergence of the spectral element discretization
(1997)We prove an existence result for the Laplace equation in a disk with discontinuous Dirichlet boundary conditions: 0 on part of the boundary and 1 on its complement. The problem is discretized by the mortar spectral element ...
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Article
Laplace type invariants for variable coefficient mKdV equations
(2015)We consider a class of variable-coefficient mKdV equations. We derive the equivalence transformations in the infinitesimal form and we employ them to construct differential invariants of the respective equivalence algebra. ...
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Article
Large sample theory for statistics of stable moving averages
(2004)We study the limit behavior of the partial sums, sample variance, and periodogram of the stable moving average process x(t)= ∫ ψ(t + x)double struck M sign (dx) explored in Resnick, S., Samorodnitsky, G., and Xue, F. (1999). ...
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Article
Large-sample inference in the general AR(1) model
(2000)The situation where the available data arise from a general AR(1) model is discussed, and two new avenues for constructing confidence intervals for the unknown autoregressive root are proposed, one based on a Central Limit ...
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Article
Large-sample inference in the general AR(1) modelAAA
(2000)The situation where the available data arise from a general AR(1) model is discussed, and two new avenues for constructing confidence intervals for the unknown autoregressive root are proposed, one based on a Central Limit ...