Results 241 to 250 of about 715,331 (285)

Spectral penalty methods

Applied Numerical Mathematics, 2000
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Analysis of penalty parameters for interior penalty Galerkin methods

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2019
Purpose The purpose of this paper is to analyse the influence of penalty parameters for an interior penalty Galerkin method, namely, the symmetric interior penalty Galerkin method. Design/methodology/approach First of all, the solution of a simple model problem is computed and compared to the exact solution, which is a periodic function. Afterwards,
Sebastian Straßer, Hans-Georg Herzog
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A penalty method for the Generalized Method of Moments

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2014
When the Electric Field Integral Equation is discretized via the Generalized Method of Moments, small current irregularities sometimes appear. We propose a cause for these current deviations and advance a solution based on a Nitsche-type constraint based stabilization method.
D. Dault, B. Shanker
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Penalty and Barrier Methods: A Unified Framework

SIAM Journal on Optimization, 1999
Summary: It is established that many optimization problems may be formulated in terms of minimizing a function \(x\rightarrow f_0 (x) + H_\infty(f_1 (x), f_2 (x),\ldots,f_m (x)) + L_\infty(Ax-b)\), where the \(f_i\) are closed functions defined on \(\mathbb{R}^N\), and where \(H_\infty\) and \(L_\infty\) are the recession functions of closed, proper ...
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The shifted penalty method

Computational Mechanics, 2015
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Penalty and Barrier Methods

2012
Penalties and barriers feature prominently in two areas of modern optimization theory. First, both devices are employed to solve constrained optimization problems [96, 183, 226]. The general idea is to replace hard constraints by penalties or barriers and then exploit the well-oiled machinery for solving unconstrained problems.
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Penalty Function Methods

1992
Since the early 1970s, some estimation-type identification procedures have been proposed. They are to choose the orders k and i minimizing $$P(k,i) = {\text{ln}}{\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{\sigma }}\mathop{{k,i}}\limits^{2} + (k + i)\frac{{C(T)}}{T}$$ , where σ k,i 2 is an estimate of the white noise variance ...
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An explicit expression for the penalty parameter of the interior penalty method

Journal of Computational Physics, 2005
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Penalty methods for the inverse problem in EIT

Physiological Measurement, 1996
The conductivity profiles arising in medical applications of electrical impedance tomography (EIT) are often of 'blocky' structure, i.e. they are relatively constant inside an organ and are rapidly varying at its boundary. Standard regularization methods for the inverse problem tend to blur these sharply defined edges.
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The penalty method for equations of viscoelastic media

Journal of Mathematical Sciences, 1998
In the present paper, we study the global classical solvability of the first initial-boundary value problem for some three-dimensional equations and the convergence of solutions of the equations to the classical solutions of the first initial-boundary value problem for the Navier-Stokes equations as e→0. Bibliography:35 titles.
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