Results 31 to 40 of about 11,306,054 (330)
Scientific Reports, 2013 Using first principles calculations based on density functional theory and a coupled finite-fields/finite-differences approach, we study the dielectric properties, phonon dispersions and Raman spectra of ZnO, a material whose internal polarization fields
A. Calzolari, M. Nardelli
semanticscholar +1 more source
Nonequilibrium Equality for Free Energy Differences [PDF]
, 1996 An expression is derived for the equilibrium free energy difference between two configurations of a system, in terms of an ensemble of finite-time measurements of the work performed in parametrically switching from one configuration to the other.
C. Jarzynski
semanticscholar +1 more source
IEEE AccessGradient variance errors in gradient-based search methods are largely mitigated using momentum, however the bias gradient errors may fail the numerical search methods in reaching the true optimum.
Mircea-Bogdan Radac, Titus Nicolae
doaj +1 more source
Entropy, 2022 In this work, an efficient and robust numerical scheme is proposed to solve the variable coefficients’ fourth-order partial differential equations (FOPDEs) that arise in Euler–Bernoulli beam models.
Abdul Ghafoor +4 more
doaj +1 more source
Generalized finite-difference schemes [PDF]
Mathematics of Computation, 1969 Finite-difference schemes for initial boundary-value problems for partial differential equations lead to systems of equations which must be solved at each time step. Other methods also lead to systems of equations. We call a method a generalized finite-difference scheme if the matrix of coefficients of the system is sparse.
Swartz, B., Wendroff, B.
openaire +1 more source
A natural derivative on [0,n] and a binomial Poincar\'e inequality [PDF]
, 2011 We consider probability measures supported on a finite discrete interval $[0,n]$. We introduce a new finitedifference operator $\nabla_n$, defined as a linear combination of left and right finite differences. We show that this operator $\nabla_n$ plays a
Hillion, Erwan +2 more
core +4 more sources
VaMpy: A Python Package to Solve 1D Blood Flow Problems
Journal of Open Research Software, 2017 Finite-differences methods such as the Lax-Wendroff method (LW) are commonly used to solve 1D models of blood flow. These models solve for blood flow and lumen area and are useful in disease research, such as hypertension and atherosclerosis, where flow ...
Alexandra K. Diem, Neil W. Bressloff
doaj +1 more source
Numerical Analysis of the Burger Equation using Finite Differences [PDF]
Al-Rafidain Journal of Computer Sciences and Mathematics, 2007 The Burger equation had been solved numerically by using two finite differences methods. The first is explicit scheme method and the second is Crank–Nicholson method.
Saad Manna, Badran Salem
doaj +1 more source
Mathematical Modelling and Analysis, 2011 This paper is concerning with the 1-D initial–boundary value problem for the hyperbolic heat conduction equation. Numerical solutions are obtained using two discretizations methods – the finite difference scheme (FDS) and the difference scheme with the ...
Harijs Kalis, Andris Buikis
doaj +1 more source
A Nodal Immersed Finite Element-Finite Difference Method
SSRN Electronic Journal, 2022 The immersed finite element-finite difference (IFED) method is a computational approach to modeling interactions between a fluid and an immersed structure. This method uses a finite element (FE) method to approximate the stresses and forces on a structural mesh and a finite difference (FD) method to approximate the momentum of the entire fluid ...
David R. Wells +3 more
openaire +4 more sources