Browsing Τμήμα Μαθηματικών και Στατιστικής / Department of Mathematics and Statistics by Title
Now showing items 720-739 of 1633
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Matrix decomposition RBF algorithm for solving 3D elliptic problems
(2009)In this study, we propose an efficient algorithm for the evaluation of the particular solutions of three-dimensional inhomogeneous elliptic partial differential equations using radial basis functions. The collocation points ...
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A matrix decomposition RBF algorithm: Approximation of functions and their derivatives
(2007)We propose an efficient algorithm for the approximation of functions and their derivatives using radial basis functions (RBFs). The interpolation points are placed on concentric circles and the resulting matrix has a block ...
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Maxima for Gaussian seas
(2006)The probability distribution of the height of global maximum for a Gaussian random field evolving in time is studied. In particular, the effect of spreading is studied and the role of the wave kinematics is discussed. It ...
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Maximal and moment inequalities for demimartingales and N-demimartingales
(2012)Newman and Wright (1982) provide an upcrossing inequality for demimartingales while Prakasa Rao (2011) provides a downcrossing inequality for the class of N-demimartingales. These results are instrumental for obtaining ...
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Maximal functions and smoothness spaces in Lp(ℝd)
(1998)We study smoothness spaces generated by maximal functions related to the local approximation errors of integral operators. It turns out that in certain cases these smoothness classes coincide with the spaces Cαp (ℝd), 0 < ...
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Maximal inequalities and convergence results for generalized U-statistics
(1990)We present some key probability inequalities and convergence results for multisample, or 'generalized' U-statistics. The reverse martingale structure of generalized U-statistic is exploited to obtain a useful Kolmogorov-type ...
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Maximal inequalities for demimartingales and a strong law of large numbers
(2000)Chow's maximal inequality for (sub)martingales is extended to the case of demi(sub)martingales introduced by Newman and Wright (Z. Wahrsch. Verw. Geb. 59 (1982) 361-371). This result serves as a "source" inequality for ...
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Maximizing the expected range from dependent observations under mean–variance information
(2016)In this article we derive the best possible upper bound for E[maxi{Xi} − mini{Xi}] under given means and variances on n random variables Xi. The random vector (X1, . . . , Xn) is allowed to have any dependence structure, ...
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A maximum entropy type test of fit
(2011)In this paper, we propose a test of fit based on maximum entropy. The asymptotic distribution of the proposed test statistic is established and a corrected form for small and medium sample sizes is furnished. The performance ...
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Maximum likelihood estimators: Nonparametric approach
(2007)In the paper, the maximum likelihood estimator for an unknown density is investigated. We deal with censored observations and construct a confidence region for this density. Bibliography: 4 titles. © 2007 Springer ...
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Maximum variance of order statistics
(1995)Yang (1982, Bull. Inst. Math. Acad. Sinica, 10(2), 197-204) proved that the variance of the sample median cannot exceed the population variance. In this paper, the upper bound for the variance of order statistics is derived, ...
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Measure-valued solutions for the equations of polyconvex adiabatic thermoelasticity
(2019)For the system of polyconvex adiabatic thermoelasticity, we define a notion of dissipative measure-valued solution, which can be considered as the limit of a viscosity approximation. We embed the system into a symmetrizable ...
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Mechanism for extrusion instabilities in polymer melts
(1999)A mechanism for explaining some of the instabilities observed during the extrusion of polymer melts is further explored. This is based on the combination of non-monotonic slip and elasticity, which permits the existence ...
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MeDIP real-time qPCR of maternal peripheral blood reliably identifies trisomy 21
(2012)Objective: To reevaluate the efficiency of the 12 differentially methylated regions (DMRs) used in the methylated DNA immunoprecipitation (MeDIP) real-time quantitative polymerase chain reaction (real-time qPCR) based ...
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Conference Object
Mediterranean sea surface temperature rise in the period 1985-2008
(Middle East Technical University, 2009)Increases in sea surface temperatures (SSTs) have been reported to occur globally over the past two decades. Here we analyze SST records from satellite data for the period 1985-2008 for the entire Mediterranean Sea, the ...
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Merging information for semiparametric density estimation
(2004)The density ratio model specifies that the likelihood ratio of m - 1 probability density functions with respect to the mth is of known parametric form without reference to any parametric model. We study the semiparametric ...
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A meshless numerical identification of a sound-hard obstacle
(2012)We propose a simple meshless method for detecting a rigid (sound-hard) scatterer embedded in a host acoustic homogeneous medium from scant measurements of the scattered near field. This inverse problem is ill-posed since ...
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