Results 11 to 20 of about 161,676 (259)

On Landau-Kolmogorov type inequalities for charges and their applications

open access: yesResearches in Mathematics, 2023
In this article we prove sharp Landau-Kolmogorov type inequalities on a class of charges defined on Lebesgue measurable subsets of a cone in $\mathbb{R}^d$, $d\geqslant 1$, that are absolutely continuous with respect to the Lebesgue measure.
V.F. Babenko   +3 more
doaj   +1 more source

Measurability of Partial Derivatives [PDF]

open access: yesProceedings of the American Mathematical Society, 1977
Let f be a real function defined in R n {R_n} . In this note we give a sufficient condition in order that the set of points where the partial derivative ∂ f / ∂ x i \partial f/\partial {x_i}
Marcus, Moshe, Mizel, Victor J.
openaire   +2 more sources

Comparison of third-order fractional partial differential equation based on the fractional operators using the explicit finite difference method

open access: yesAlexandria Engineering Journal, 2023
In this research paper, the third-order fractional partial differential equation (FPDE) in the sense of the Caputo fractional derivative and the Atangana-Baleanu Caputo (ABC) fractional derivative is investigated for the first time. The importance of the
Shorish Omer Abdulla   +2 more
doaj   +1 more source

Virtual Constant Signal Injection-Based MTPA Control for IPMSM Considering Partial Derivative Term of Motor Inductance Parameters

open access: yesWorld Electric Vehicle Journal, 2022
The dq-axis inductance parameter value of the Internal Permanent Magnet Synchronous Motor (IPMSM) will change with the dq-axis current. The Virtual Constant Signal Injection Method (VCSIM)-based Maximum Torque Per Ampere (MTPA) control ignores the ...
Qiang Miao   +5 more
doaj   +1 more source

A generalization of arithmetic derivative to p-adic fields and number fields [PDF]

open access: yesNotes on Number Theory and Discrete Mathematics
The arithmetic derivative is a function from the natural numbers to itself that sends all prime numbers to 1 and satisfies the Leibniz rule. The arithmetic partial derivative with respect to a prime p is the p-th component of the arithmetic derivative ...
Brad Emmons, Xiao Xiao
doaj   +1 more source

Analytical Solutions for the Nonlinear Partial Differential Equations Using the Conformable Triple Laplace Transform Decomposition Method

open access: yesInternational Journal of Differential Equations, 2021
In this paper, a novel analytical method for solving nonlinear partial differential equations is studied. This method is known as triple Laplace transform decomposition method. This method is generalized in the sense of conformable derivative.
Shailesh A. Bhanotar   +1 more
doaj   +1 more source

Weight Function Method for computations of crack face displacements and stress intensity factors of center cracks [PDF]

open access: yesFracture and Structural Integrity, 2015
The weight function method provides a powerful and reliable tool for the determination of the stress intensity factor around the crack tip in a linearly elastic cracked solid subjected to arbitrary loading conditions.
Junling Fan   +4 more
doaj   +3 more sources

Depth-Extrapolation-Based True-Amplitude Full-Wave-Equation Migration from Topography

open access: yesApplied Sciences, 2021
The lack of an initial condition is one of the major challenges in full-wave-equation depth extrapolation. This initial condition is the vertical partial derivative of the surface wavefield and cannot be provided by the conventional seismic acquisition ...
Hao Liu, Xuewei Liu
doaj   +1 more source

NUMERICAL MODELING OF HYDRODYNAMIC PROCESSES IN AQUIFERS

open access: yesСовременная наука и инновации, 2022
The article deals with development of a mathematical model of hydrodynamic processes in aquifers. The mathematical model of the object is represented as a system of differential equations in partial derivatives that can be solved by the explicit scheme ...
Maxim Alexandrovich Sixtus
doaj  

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