Results 21 to 30 of about 1,276,307 (288)

Complementary First and Second Derivative Methods for Ansatz Optimization in Variational Monte Carlo [PDF]

, 2019
We present a comparison between a number of recently introduced low-memory wave function optimization methods for variational Monte Carlo in which we find that first and second derivative methods possess strongly complementary relative advantages.
Neuscamman, Eric, Otis, Leon
core   +2 more sources

Extended Soliton Solutions in an Effective Action for SU(2) Yang-Mills Theory [PDF]

, 2006
The Skyrme-Faddeev-Niemi (SFN) model which is an O(3) $\sigma$ model in three dimensional space up to fourth-order in the first derivative is regarded as a low-energy effective theory of SU(2) Yang-Mills theory.
Sawado, Nobuyuki, Shiiki, Noriko, Tanaka, Shingo   +2 more
core   +3 more sources

Wavelets operational methods for fractional differential equations and systems of fractional differential equations [PDF]

, 2017
In this thesis, new and effective operational methods based on polynomials and wavelets for the solutions of FDEs and systems of FDEs are developed.
A. H. Al-Bagawi, A. H. Al-Bagawi, Abdo Alkhadhera, Sadeq Abdullah, Abdul Kadir, Aeslina, Al-Gheethi, Adel, M. Magam, Sami, Masood, Najat, Suratman, Suhaimi, Y. A. Alanazid, Tahani, Zakaria, Mohamad Pauzi   +8 more
core   +2 more sources

On Derivative Free Multiple-Root Finders with Optimal Fourth Order Convergence

Mathematics, 2020
A number of optimal order multiple root techniques that require derivative evaluations in the formulas have been proposed in literature. However, derivative-free optimal techniques for multiple roots are seldom obtained.
Janak Raj Sharma, Sunil Kumar, Lorentz Jäntschi   +2 more
doaj   +1 more source

P-Stable Higher Derivative Methods with Minimal Phase-Lag for Solving Second Order Differential Equations

Journal of Applied Mathematics, 2011
Some new higher algebraic order symmetric various-step methods are introduced. For these methods a direct formula for the computation of the phase-lag is given. Basing on this formula, calculation of free parameters is performed to minimize the phase-lag.
Fatheah A. Hendi
doaj   +1 more source

Two different spectrophotometric methods for simultaneous determination of binary mixture of atenolol and amlodipine in commercial formulation

Zanco Journal of Pure and Applied Sciences, 2022
For the simultaneous determination of a binary mixture of amlodipine (AM) and atenolol (AT) in tablets, two approaches were accessible. The first method is the second derivative of the ratio spectra (2DD) that obtained via dividing the absorption ...
Shilan A. Omer, muharam Yassin Mohammad, mohammad Abdullah   +2 more
doaj   +1 more source

Near conserving energy numerical schemes for two-dimensional coupled seismic wave equations [PDF]

, 2018
Two-dimensional coupled seismic waves, satisfying the equations of linear isotropic elasticity, on a rectangular domain with initial conditions and periodic boundary conditions, are considered.
Portillo de la Fuente, Ana María
core   +1 more source

Memory Protection Generative Adversarial Network (MPGAN): A Framework to Overcome the Forgetting of GANs Using Parameter Regularization Methods

IEEE Access, 2020
Generative adversarial networks (GANs) suffer from catastrophic forgetting when learning multiple consecutive tasks. Parameter regularization methods that constrain the parameters of the new model in order to be close to the previous model through ...
Yifan Chang, Wenbo Li, Jian Peng, Haifeng Li, Yu Kang, Yingliang Huang   +5 more
doaj   +1 more source

Estimation of the Value of Reverse Blood Flow in the Artery by the Second Derivative of the Pulse Pressure Wave [PDF]

Известия Саратовского университета. Новая серия: Физика, 2020
Background and Objectives: Previously, the diastolic section of the pulse wave was most often analyzed as the result of reflection of a direct wave from the elements of peripheral vessels.
Baatyrov, Rahim Taalaibekovich, Kalinkin, Mikhail Yurievich, Usanov, Andrey Dmitryevich, Dobdin, Sergey Iur'evich, Skripal, Anatoly Vladimirovich   +4 more
doaj   +1 more source

A class of explicit second derivative general linear methods for non-stiff ODEs

Mathematical Modelling and Analysis
In this paper, we construct explicit second derivative general linear methods (SGLMs) with quadratic stability and a large region of absolute stability for the numerical solution of non-stiff ODEs.
Mohammad Sharifi, Ali Abdi, Michal Braś, Gholamreza Hojjati   +3 more
doaj   +1 more source