Results 111 to 120 of about 1,550,711 (171)

Inferring intrinsic neural timescales using optimal control theory. [PDF]

open access: yesNat Commun
Kim JZ   +9 more
europepmc   +1 more source

Image-Based Pore Space and Pore Network Characterization: A Review of 2D/3D Workflow in Foods. [PDF]

open access: yesJ Food Sci
Luka BS   +5 more
europepmc   +1 more source

On Roundoff Error Growth in Elliptic Problems

open access: yesACM Transactions on Mathematical Software, 2018
Large-scale linear systems arise in finite-difference and finite-element discretizations of elliptic problems. With increasing computer performance, ever larger systems are solved using direct methods. How large can such systems be without roundoff compromising accuracy? Here we model roundoff dynamics in standard LU
Gustaf Söderlind, Ivo Babuska
exaly   +4 more sources
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On the statistics of fixed-point roundoff error

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1985
Roundoff error after fixed-point multiplication is commonly modeled as uniformly distributed white noise that is uncorrelated with the signal. This paper presents a statistical analysis of fixed-point roundoff error that identifies the conditions under which this model is valid, and examines the statistical behavior of roundoff error when these ...
Casper W. Barnes   +2 more
exaly   +3 more sources

A new iterative refinement with roundoff error analysis

Numerical Linear Algebra With Applications, 2011
AbstractIn this paper we present a novel improvement of Wilkinson's iterative refinement for the solution of linear system by using stability results of numerical solution for a dynamic system associated with the linear system. The convergence analysis is shown and roundoff error analysis is considered for this new refinement. Numerical experiments are
Zhengyu Wang
exaly   +4 more sources

On the variance of a centered random value roundoff error

Signal Processing, 2015
We derive two expressions for roundoff error variance, one for a rounded off random value with a zero mean and a given variance under uniform distribution and another for such a value under a normal. Also, an expression for truncation error variance for values under uniform distribution is obtained.
exaly   +2 more sources

Overflow and Roundoff Error Analysis via Model Checking [PDF]

open access: yes, 2009
This paper proposes a framework for statically analyzing overflow and roundoff errors of C programs. First, a new range representation, "extended affine interval", is proposed to estimate overflow and roundoff errors.
Mizuhito Ogawa
exaly   +2 more sources

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