Results 31 to 40 of about 4,477,780 (283)

Automatic Recognition Method of Letter Images in English Self-Learning Based on Partial Differential Equation Method

open access: yesAdvances in Mathematical Physics, 2021
According to the current situation of knowledge popularization, students simply rely on the knowledge learned in the classroom that is far from adapting to the development of modern society; so, every student needs to have the consciousness and ability ...
Yu Zhao, Shuping Du, Ran Li, Hong Yue
doaj   +1 more source

Investigation of Phase-Locked Loop Statistics via Numerical Implementation of the Fokker–Planck Equation

open access: yesApplied Sciences, 2020
The goal of this paper is to explore the effect of various parameters on the information geometric structure of the phase-locked loop (PLL) statistics, both transient and stationary. Comprehensive treatment on the behavior of PLL statistics will be given.
Dah-Jing Jwo
doaj   +1 more source

Sick leave and disability pension among TMD patients with musculoskeletal diseases, mental and behavioural disorders – a SWEREG-TMD population-based cohort study

open access: yesBMC Public Health, 2023
Background Temporomandibular disorders (TMD) are associated with musculoskeletal diseases (MSD), mental and behavioural disorders (MBD), and patients with TMD have been shown to have 2–3 times more days of sick leave (SL) and disability pension (DP) than
Adrian Salinas Fredricson   +8 more
doaj   +1 more source

Additive difference scheme for two-dimensional fractional in time diffusion equation

open access: yesFilomat, 2017
An additive finite-difference scheme for numerical approximation of initial-boundary value problem for two-dimensional fractional in time diffusion equation is proposed. Its stability is investigated and a convergence rate estimate is obtained.
Hodžić-Živanović, Sandra   +1 more
openaire   +2 more sources

Reduced Multiplicative (BURA-MR) and Additive (BURA-AR) Best Uniform Rational Approximation Methods and Algorithms for Fractional Elliptic Equations

open access: yesFractal and Fractional, 2021
Numerical methods for spectral space-fractional elliptic equations are studied. The boundary value problem is defined in a bounded domain of general geometry, Ω⊂Rd, d∈{1,2,3}. Assuming that the finite difference method (FDM) or the finite element method (
Stanislav Harizanov   +4 more
doaj   +1 more source

Exponential dichotomy for noninvertible linear difference equations [PDF]

open access: yes, 2021
In this article we study exponential dichotomies for noninvertible linear difference equations in finite dimensions. After giving the definition, we study the extent to which the projection P(k) in a dichotomy is unique.
Battelli, F., Franca, M., Palmer, K. J.
core   +1 more source

Nonlinear dynamics of the additive-pulse modelocked laser

open access: yesDiscrete Dynamics in Nature and Society, 1998
We have modeled the additive-pulse modelocked (APM) laser with a set of four nonlinear difference equations, that describe the transit of optical pulses through the main cavity and through an external cavity containing a single-mode optical fiber ...
E. J. Mozdy, C. R. Pollock
doaj   +1 more source

Behavior of solution of stochastic difference equation with continuous time under additive fading noise

open access: yesDiscrete and Continuous Dynamical Systems - B, 2022
Consider the following difference equation on \(\mathbb{R}^n\) with continuous time and under the influence of an additive stochastic perturbation: \[ \begin{multlined} x(t+\tau)=a_1(t,x(t),x(t-h_1),x(t-h_2),\dots)\\ +a_2(t,x(t),x(t-h_1),x(t-h_2),\dots)\xi(t+\tau) +b(t)\eta(t+\tau), \end{multlined} \] with \( t>t_0-\tau\) and \[ x(\theta)=\phi(\theta),\
openaire   +3 more sources

Theoretical and experimental analysis of phase noise in semiconductor lasers biased below threshold

open access: yesJPhys Photonics
We report a theoretical and experimental study of phase noise in semiconductor lasers when the bias current is below the threshold value. The theoretical study is performed by using two types of rate equations, with additive and multiplicative noise ...
Iker Pascual de Zulueta, Angel Valle
doaj   +1 more source

Causal inference for the covariance between breeding values under identity disequilibrium

open access: yesGenetics Selection Evolution, 2022
Background The covariance matrix of breeding values is at the heart of prediction methods. Prediction of breeding values can be formulated using either an “observed” or a theoretical covariance matrix, and a major argument for choosing one or the other ...
Rodolfo J. C. Cantet   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy