Browsing Τμήμα Μαθηματικών και Στατιστικής / Department of Mathematics and Statistics by Title
Now showing items 634-653 of 1633
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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 ...
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Article
LASSO order selection for sparse autoregression: a bootstrap approach
(2017)Autoregressive models are widely employed for predictions and other inferences in many scientific fields. While the determination of their order is in general a difficult and critical step, this task becomes more complicated ...
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Article
Lax pairs, symmetries and recursion operators for Toda lattices
(1997)With the exception of some minor results and some conjectures, this paper is a survey of the finite nonperiodic Toda lattices and some of their generalizations. The areas investigated include Lax pairs, master symmetries, ...
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Article
Learning and Convergence Analysis of Neural-Type Structured Networks
(1992)A special class of feedforward neural networks, referred to as structured networks, has recently been introduced as a method for solving matrix algebra problems in an inherently parallel formulation. In this paper we present ...
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Conference Object
Learning laws exponential error convergence for recurrent neural networks
(Publ by IEEE, 1993)In this paper, we propose new learning laws for adjusting the weights of recurrent high order neural networks (RHONN) when they are used to system identification problems. The main advantages of these learning laws over ...
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Conference Object
Learning techniques for structured networks
(Publ by American Automatic Control Council, 1991)A convergence analysis is presented for the training of structured networks. Since the learning techniques that are used in structured networks are the same as the ones used in training of neural networks, the issue of ...
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Book
Lectures notes on elementary number theory
([s.n.], 2010)
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Article
Legendre Gauss spectral collocation for the Helmholtz equation on a rectangle
(2004)A spectral collocation method with collocation at the Legendre Gauss points is discussed for solving the Helmholtz equation -Δu+κ(x,y)u=f(x,y) on a rectangle with the solution u subject to inhomogeneous Robin boundary ...
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Article
A legendre spectral collocation method for the biharmonic Dirichlet problem
(2000)A Legendre spectral collocation method is presented for the solution of the biharmonic Dirichlet problem on a square. The solution and its Laplacian are approximated using the set of basis functions suggested by Shen, which ...