Effect of the non‐linear screening on a modification of the Debye–Hückel plus hole approximation in complex plasma
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DOI: 10.1002/ctpp.201800154
Abstract: The authors analyse two‐component electroneutral systems of classical macroions of finite size and point‐like oppositely charged microions. This article deals with the modification of the Debye–Hückel plus hole approximation when a non‐linear screening effect is… read more here.
Keywords: non linear; debye ckel; modification debye; linear screening ... See more keywords
Variational multiscale approximation of the one-dimensional forced Burgers equation: the role of orthogonal subgrid scales in turbulence modeling
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DOI: 10.1002/fld.4420
Abstract: Summary A numerical approximation for the one-dimensional Burgers equation is proposed by means of the Orthogonal Sub-Grid Scales - Variational Multi-Scale (OSGS-VMS) method. We evaluate the role of the variational subscales in describing the Burgers… read more here.
Keywords: approximation; one dimensional; burgers equation; approximation one ... See more keywords
Synthetic minority oversampling for function approximation problems
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DOI: 10.1002/int.22120
Abstract: Imbalanced data sets are a common occurrence in important machine learning problems. Research in improving learning under imbalanced conditions has largely focused on classification problems (ie, problems with a categorical dependent variable). However, imbalanced data… read more here.
Keywords: function approximation; approximation; approximation problems; minority oversampling ... See more keywords
On null sequences for Banach operator ideals, trace duality and approximation properties
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DOI: 10.1002/mana.201600273
Abstract: Let A be a Banach operator ideal and X be a Banach space. We undertake the study of the vector space of A-null sequences of Carl and Stephani on X, c0,A(X), from a unified point… read more here.
Keywords: space; banach operator; approximation; operator ideals ... See more keywords
Discrete operators of sampling type and approximation in φ-variation
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DOI: 10.1002/mana.201600508
Abstract: The paper deals with approximation results with respect to the I†â€ variation by means of a family of discrete operators for I†â€ absolutely continuous functions. In particular, for the considered family of operators and for… read more here.
Keywords: variation; approximation; sampling type; operators sampling ... See more keywords
Restricted thresholding: recovering smoothness and preserving edges
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DOI: 10.1002/mana.201700263
Abstract: Restricted non linear approximation is a generalization of the N‐term approximation in which a measure on the index set of the approximants controls the type, instead of the number, of elements in the approximation. Thresholding… read more here.
Keywords: smoothness preserving; approximation; preserving edges; thresholding recovering ... See more keywords
Analysis and spline approximation of surface charge and potential at planar electrochemical interfaces
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DOI: 10.1002/mma.5753
Abstract: In this paper, we consider the Poisson‐Boltzmann theory to model the electrostatic potential of a bulk electrolyte containing a single planar charged surface. In the case of a constant surface charge density, we address the… read more here.
Keywords: analysis spline; planar; surface; surface charge ... See more keywords
The KdV approximation for a system with unstable resonances
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DOI: 10.1002/mma.6110
Abstract: The KdV equation can be derived via multiple scaling analysis for the approximate description of long waves in dispersive systems with a conservation law. In this paper, we justify this approximation for a system with… read more here.
Keywords: system; system unstable; approximation system; unstable resonances ... See more keywords
Construction of feedforward neural networks with simple architectures and approximation abilities
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DOI: 10.1002/mma.6876
Abstract: The universal approximation property of feedforward neural networks (FNNs) is the basis for all FNNs applications. In almost all existing FNN approximation studies, it is always assumed that the activation function of the network satisfies… read more here.
Keywords: feedforward neural; neural networks; activation function; function ... See more keywords
Assessing the validity of the approximation of diffusion‐weighted‐MRI signals from crossing fascicles by sums of signals from single fascicles
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DOI: 10.1002/mrm.26832
Abstract: To assess the validity of the superposition approximation for crossing fascicles, i.e., the assumption that the total diffusion‐weighted MRI signal is the sum of the signals arising from each fascicle independently, even when the fascicles… read more here.
Keywords: crossing fascicles; approximation; validity; diffusion weighted ... See more keywords
A parameterized approximation algorithm for the mixed and windy capacitated arc routing problem: Theory and experiments
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DOI: 10.1002/net.21742
Abstract: We prove that any polynomial-time $\alpha(n)$-approximation algorithm for the $n$-vertex metric asymmetric Traveling Salesperson Problem yields a polynomial-time $O(\alpha(C))$-approximation algorithm for the mixed and windy Capacitated Arc Routing Problem, where $C$ is the number of… read more here.
Keywords: approximation algorithm; approximation; polynomial time; problem ... See more keywords