Results 131 to 140 of about 4,846 (246)

NUMERICAL EVALUATION OF SELF AND MUTUAL EARTH RETURN IMPEDANCES [PDF]

open access: yesCarpathian Journal of Electrical Engineering, 2014
The paper presents an evaluation of analytical self and mutual impedances formulas of lines with earth return, taking into account the ground correction terms.
Denisa STET   +3 more
doaj  

A Stable and Accurate X‐FFT Solver for Linear Elastic Homogenization Problems in 3D

open access: yesInternational Journal for Numerical Methods in Engineering, Volume 127, Issue 10, 30 May 2026.
ABSTRACT Although FFT‐based methods are renowned for their numerical efficiency and stability, traditional discretizations fail to capture material interfaces that are not aligned with the grid, resulting in suboptimal accuracy. To address this issue, the work at hand introduces a novel FFT‐based solver that achieves interface‐conforming accuracy for ...
Flavia Gehrig, Matti Schneider
wiley   +1 more source

Error bounds for compound quadrature of weakly singular integrals

open access: yes, 1971
This paper studies the convergence of numerical quadratures of singular integrands. The singularities are ignored in the sense that whenever a singularity occurs the integrand is redefined to be zero.
Richard K. Miller, Alan Feldstein
core   +1 more source

On The Validity Of The Narrow Band Approximation

open access: yes, 1971
The accuracy of the narrow band approximation is estimated. It is shown that, in order to assess the accuracy of the approximation, not only the form of the source function but also the form of the integrand is required. The accuracy is improved when the
Viskanta, R., Crosbie, Alfred L.
core   +1 more source

NESTED TAYLOR DECOMPOSITION IN MULTIVARIATE FUNCTION DECOMPOSITION

open access: yes, 2014
Fluctuationlessness approximation applied to the remainder term of a Taylor decomposition expressed in integral form is already used in many articles. Some forms of multi-point Taylor expansion also are considered in some articles. This work is somehow a
GÜRVİT, ERCAN
core   +1 more source

Some Additions to a Family of Sums and Integrals related to Hurwitz' Zeta Function(s), Euler polynomials and Euler Numbers

open access: yes, 2021
Integrals involving the kernel function $sech (\pi x)$ over a semi-infinite range are of general interest in the study of Riemann's function $\zeta(s)$ and Hurwitz' function $\zeta(s,a)$.
Milgram, Michael
core  

Roaming moduli space using dynamical triangulations

open access: yes, 2011
In critical as well as in non-critical string theory the partition function reduces to an integral over modulispace after integration over matter fields. For non-critical string theory this moduli integrand is known for genus one surfaces.
T. G. Budd   +9 more
core   +1 more source

Approximating the location of integrand discontinuities for penumbral illumination computation with area light sources

open access: yes, 1999
. The problem of computing soft shadows with area light sources has received considerable attention in computer graphics. In part, this is a difficult problem because the integral that defines the radiance at a point must take into account the visibility
Marc J. Ouellette, Eugene Fiume
core  

Equivalence of coercivity and mean coercivity in higher-order variational integrals with application to minimization

open access: yesJournal of Inequalities and Applications
We consider a functional of the type F ( u , Ω ) = ∫ Ω F ( D k u ( x ) ) d x $\mathcal{F}(u,\Omega )=\int _{\Omega}F\big(D^{k}u(x)\big)dx$ on the Dirichlet class, where F is a continuous function and Ω is an open bounded set of R n $\mathbb{R}^{n}$ with ...
Xiaoying He, Chuei Yee Chen
doaj   +1 more source

Holographic reconstruction for AdS Wilson line networks and scalar Witten diagrams

open access: yesJournal of High Energy Physics
We find a holographic reconstruction formula for gravitational Wilson line network operators in AdS2 evaluated between Ishibashi states of the algebra sl(2, ℝ).
Konstantin Alkalaev, Vladimir Khiteev
doaj   +1 more source

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