Results 31 to 40 of about 2,673 (90)

Derivation of Shape Functions for Nine‐Node Rectangular Element Based on Steady‐State Heat Conduction

Advances in Civil Engineering, Volume 2025, Issue 1, 2025.
This paper presents a novel method for deriving shape functions of a nine‐node rectangular element based on solving the steady‐state heat conduction equation. Unlike traditional methods using Lagrange polynomials, this approach utilizes a linear combination of temperature distribution (TD) coefficients to extract second‐order shape functions for a one ...
Ramin Tabatabaei Mirhosseini, Ramin Shamsi, Wen-Da Wang   +2 more
wiley   +1 more source

The Rabin cryptosystem revisited [PDF]

, 2013
The Rabin public-key cryptosystem is revisited with a focus on the problem of identifying the encrypted message unambiguously for any pair of primes.
Elia, Michele, Piva, Matteo, Schipani, Davide   +2 more
core  

Investigating the Influence of Petrophysical Parameter in Gravel Packing Sand Control Applications

Geofluids, Volume 2025, Issue 1, 2025.
Gravel packing is a primary method for sand control in hydrocarbon wells, with its effectiveness primarily governed by gravel particle size and packing structure. Current gravel packing designs primarily rely on empirical engineering experience, while rock physics models for quantifying gravel packing permeability remain underdeveloped.
Jin Dai, Guangzhi Liao, Hengrong Zhang, Wei Tan, Tao Chen, Haishan Liu, Xueli Hou, Nan Li, Zhenyuan Yin   +8 more
wiley   +1 more source

Criterion for Class Number of the Family Q254m2+m to be Greater Than or Equal to Three

Journal of Mathematics, Volume 2025, Issue 1, 2025.
In this paper, we present an explicit lower bound for the class number of real quadratic field k=QD, where D = 25m2 + 4m is a square‐free integer and m ≡ 4 (mod 5) is an odd positive integer.
Ahmad Issa, Huadong Su
wiley   +1 more source

Numerical implementation of some reweighted path integral methods

, 2003
The reweighted random series techniques provide finite-dimensional approximations to the quantum density matrix of a physical system that have fast asymptotic convergence. We study two special reweighted techniques that are based upon the Levy-Ciesielski
Doll, J. D., Predescu, Cristian, Sabo, Dubravko   +2 more
core   +1 more source

A rational‐Chebyshev projection method for nonlinear eigenvalue problems

Numerical Linear Algebra with Applications, Volume 31, Issue 6, December 2024.
Abstract This article describes a projection method based on a combination of rational and polynomial approximations for efficiently solving large nonlinear eigenvalue problems. In a first stage the nonlinear matrix function T(λ)$$ T\left(\lambda \right) $$ under consideration is approximated by a matrix polynomial in λ$$ \lambda $$.
Ziyuan Tang, Yousef Saad
wiley   +1 more source

Effective action of a five-dimensional domain wall

, 2009
We calculate the four-dimensional low-energy effective action for the perturbations of a two-scalar domain wall model in five dimensions. Comparison of the effective action to the Nambu-Goto action reveals the presence of an additional coupling between ...
K Zuleta, R. Rajaraman, S. Mele, Y Burnier   +3 more
core   +1 more source

Zero‐curvature subconformal structures and dispersionless integrability in dimension five

Journal of the London Mathematical Society, Volume 110, Issue 6, December 2024.
Abstract We extend the recent paradigm “Integrability via Geometry” from dimensions 3 and 4 to higher dimensions, relating dispersionless integrability of partial differential equations to curvature constraints of the background geometry. We observe that in higher dimensions on any solution manifold, the symbol defines a vector distribution equipped ...
Boris Kruglikov, Omid Makhmali
wiley   +1 more source

Upon the existence of short-time approximations of any polynomial order for the computation of density matrices by path integral methods

, 2003
In this article, I provide significant mathematical evidence in support of the existence of short-time approximations of any polynomial order for the computation of density matrices of physical systems described by arbitrarily smooth and bounded from ...
A. D. Klemm, B. Simon, Cristian Predescu, D. L. Freeman, G. H. Hardy, H. P. McKean, Jr., H. Trotter, J. D. Doll, M. Kac, M. Suzuki, M. Suzuki, M. Takahashi, R. Durrett, R. P. Feynman, S. Kwapien, W. H. Press   +15 more
core   +1 more source

An explicit fourth‐order hybrid‐variable method for Euler equations with a residual‐consistent viscosity

Numerical Methods for Partial Differential Equations, Volume 40, Issue 6, November 2024.
Abstract In this article, we present a formally fourth‐order accurate hybrid‐variable (HV) method for the Euler equations in the context of method of lines. The HV method seeks numerical approximations to both cell averages and nodal solutions and evolves them in time simultaneously; and it is proved in previous work that these methods are ...
Xianyi Zeng
wiley   +1 more source