Results 11 to 20 of about 60,168 (264)

Universal differential equations for glacier ice flow modelling [PDF]

open access: yesGeoscientific Model Development, 2023
Geoscientific models are facing increasing challenges to exploit growing datasets coming from remote sensing. Universal differential equations (UDEs), aided by differentiable programming, provide a new scientific modelling paradigm enabling both complex ...
J. Bolibar   +8 more
doaj   +1 more source

Fractional Complex Transform and exp-Function Methods for Fractional Differential Equations [PDF]

open access: yesAbstract and Applied Analysis, 2013
The exp-function method is presented for finding the exact solutions of nonlinear fractional equations. New solutions are constructed in fractional complex transform to convert fractional differential equations into ordinary differential equations. The fractional derivatives are described in Jumarie's modified Riemann-Liouville sense.
Ahmet Bekir   +2 more
openaire   +6 more sources

Family of the Atomic Radial Basis Functions of Three Independent Variables Generated by Helmholtz-Type Operator

open access: yesEast European Journal of Physics, 2021
The paper presents an algorithm for constructing the family of the atomic radial basis functions of three independent variables  generated by Helmholtz-type operator, which may be used as basis functions for the implementation of meshless methods for ...
Denys Protektor
doaj   +1 more source

Textural characteristics of composite adsorbents analyzed with density functional theory and self-consistent regularization procedure

open access: yesХімія, фізика та технологія поверхні, 2020
Highly disperse or porous complex and hybrid materials and nanocomposites characterized by the presence of several phases, nonuniform particulate morphology, and complicated porosity with contributions of pores of various shapes are widely used in ...
V. M. Gun'ko
doaj   +1 more source

Time-Optimal Trajectory Planning of Six-Axis Manipulators Based on the Improved Direct Collocation Method with FMU

open access: yesApplied Sciences, 2022
The trajectory planning method with dynamics is the key to improving the motion performance of manipulators. The optimal control method (OCM) is a key technology to solve optimal problems with dynamics.
Ziyao Xiong, Jianwan Ding, Liping Chen
doaj   +1 more source

On the Calculation of Functional Safety Parameters of Technical Systems [PDF]

open access: yesInternational Journal of Mathematical, Engineering and Management Sciences, 2020
Now the scientific methodology is created, the theory and practice of the analysis and synthesis of functional safety of responsible electronic programmable devices and systems at all stages of their life cycle are developed.
Igor B. Shubinskiy   +2 more
doaj   +1 more source

Numerical study of a Lyapunov functional for the complex Ginzburg-Landau equation [PDF]

open access: yesPhysica D: Nonlinear Phenomena, 1996
20 pages,LaTeX, Postcript version with figures included available at http://formentor.uib.es/~montagne/textos ...
Montagne, R.   +2 more
openaire   +3 more sources

Nonlinear Pantograph-Type Diffusion PDEs: Exact Solutions and the Principle of Analogy

open access: yesMathematics, 2021
We study nonlinear pantograph-type reaction–diffusion PDEs, which, in addition to the unknown u=u(x,t), also contain the same functions with dilated or contracted arguments of the form w=u(px,t), w=u(x,qt), and w=u(px,qt), where p and q are the free ...
Andrei D. Polyanin, Vsevolod G. Sorokin
doaj   +1 more source

Dynamics of solutions of nonlinear functional differential equation of parabolic type [PDF]

open access: yesИзвестия высших учебных заведений: Прикладная нелинейная динамика, 2022
Purpose of this work is to study the initial-boundary value problem for a parabolic functional-differential equation in an annular region, which describes the dynamics of phase modulation of a light wave passing through a thin layer of a nonlinear Kerr ...
Kornuta, Anshelika Alexandrovna   +1 more
doaj   +1 more source

On a functional equation for the exponential function of a complex variable [PDF]

open access: yesGlasgow Mathematical Journal, 1971
The following result is well known in the theory of analytic functions; see [1].Theorem A. Suppose that f(z) is an entire function of a complex variable z. Then f(z) satisfies the functional equationwhere z = x + iy (x, y real), if and only if f(z) = aexp(sz), where a is an arbitrary complex constant and s is an arbitrary real constant.
openaire   +1 more source

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