Results 31 to 40 of about 4,701,672 (287)

An improvement of two nonstandard finite difference schemes for two population mathematical models [PDF]

, 2021
The aim of this paper is to design appropriate nonstandard finite difference (NSFD) schemes for two population mathematical models based on coupled nonlinear ordinary differential equations.
Calatayud, Julia, Jornet, Marc, Marc Jornet, Julia Calatayud   +3 more
core   +1 more source

DYNAMICS OF A GEOMETRICALLY AND PHYSICALLY NONLINEAR SENSITIVE ELEMENT OF A NANOELECTROMECHANICAL SENSOR IN THE FORM OF AN INHOMOGENEOUS NANOBEAM IN THE TEMPERATURE AND NOISE FIELDS

Известия Томского политехнического университета: Инжиниринг георесурсов, 2020
The research relevance. Nanoelectromechanical systems, being highly sensitive sensors with small dimensions and reliable in operation, are increasingly used in the oil and gas industry for monitoring various processes in oil production, from exploration ...
Vadim A. Krysko, Irina V. Papkova, Tatiana V. Yakovleva, Alena A. Zakharova, Maksim V. Zhigalov, Anton V. Krysko   +5 more
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

BMC 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, Carina Krüger Weiner, Johanna Adami, Annika Rosén, Bodil Lund, Britt Hedenberg-Magnusson, Lars Fredriksson, Pia Svedberg, Aron Naimi-Akbar   +8 more
doaj   +1 more source

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

Filomat, 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, Jovanović, Boško S.   +1 more
openaire   +2 more sources

Hyers–Ulam–Rassias Stability of Set Valued Additive and Cubic Functional Equations in Several Variables

, 2019
In this paper, we establish Hyers–Ulam–Rassias stability results belonging to two different set valued functional equations in several variables, namely additive and cubic. The results are obtained in the contexts of Banach spaces.
Binayak S. Choudhury, Tapas K. Samanta, Parbati Saha, Nabin C. Kayal, Manuel de la Sen   +4 more
core   +1 more source

Asymptotic Behavior of Certain Non-Autonomous Planar Competitive Systems of Difference Equations

, 2023
This paper investigates the dynamics of non-autonomous competitive systems of difference equations with asymptotically constant coefficients. We are mainly interested in global attractivity results for such systems and the application of such results to ...
Susan Trolle, Mustafa R. S. Kulenović, Zehra Nurkanović, Mehmed Nurkanović   +3 more
core   +1 more source

Nonlinear dynamics of the additive-pulse modelocked laser

Discrete 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

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

Fractal 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, Nikola Kosturski, Ivan Lirkov, Svetozar Margenov, Yavor Vutov   +4 more
doaj   +1 more source

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

JPhys 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

On linear implicit non-autonomous systems of difference equations

, 2002
This paper deals with the solvability of initial-value problems (IVPs) and multipoint boundary-value problems (MPBVPs) for linear implicit non-autonomous systems of difference ...
Du N.H., Loi L.C., Anh P.K.
core   +1 more source