Results 31 to 40 of about 769,228 (261)
On a final value problem for parabolic equation on the sphere with linear and nonlinear source
Advances in the Theory of Nonlinear Analysis and its Application, 2020 Parabolic equation on the unit sphere arise naturally in geophysics and oceanography when we model a physical quantity on large scales. In this paper, we consider a problem of finding the initial state for backward parabolic problem on the sphere. This backward parabolic problem is ill-posed in the sense of Hadamard.
Nguyen Duc Phuong +2 more
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The General Fractional Derivative and Related Fractional Differential Equations
Mathematics, 2020 In this survey paper, we start with a discussion of the general fractional derivative (GFD) introduced by A. Kochubei in his recent publications. In particular, a connection of this derivative to the corresponding fractional integral and the Sonine ...
Yuri Luchko, Masahiro Yamamoto
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F1000Research, 2022 Background: A growing population of cells accumulates mutations. A single mutation early in the growth process carries forward to all descendant cells, causing the final population to have a lot of mutant cells.
Steven A. Frank
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F1000Research, 2023 Background: A growing population of cells accumulates mutations. A single mutation early in the growth process carries forward to all descendant cells, causing the final population to have a lot of mutant cells.
Steven A. Frank
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The Approximate Solution of Some Plane Boundary Value Problems of the Moment Theory of Elasticity
Advances in Mathematical Physics, 2016 We consider a two-dimensional system of differential equations of the moment theory of elasticity. The general solution of this system is represented by two arbitrary harmonic functions and solution of the Helmholtz equation.
Roman Janjgava
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Evolutionary Approach to Lambert’s Problem for Non-Keplerian Spacecraft Trajectories
Aerospace, 2017 In this paper, we use differential evolution (DE), with best-evolved results refined using a Nelder–Mead optimization, to solve boundary-value complex problems in orbital mechanics relevant to low Earth orbits (LEO).
David W. Hinckley, Darren L. Hitt
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Predicting the optimal solution in fuzzy linear programming problem
Қарағанды университетінің хабаршысы. Математика сериясы, 2021 In this paper we try to define a percentage form of LR fuzzy numbers which is a useful form of fuzzy numbers and its’ arithmetics. So, we show how the maximum variation range of optimal value of fuzzy objective function can be predicted by using this ...
S.M. Davoodi, N.A. Abdul Rahman
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Fuzzy Logic Analysis for Key Factors for Customer Loyalty in E-Shopping Environment
Frontiers in Psychology, 2021 Due to subjective evaluation and qualitative characteristics, the assessment processes of loyalty often cannot use the crisp value to express the final value.
Li-Xin Guo +7 more
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An efficient variable stepsize rational method for stiff, singular and singularly perturbed problems
Alexandria Engineering Journal, 2022 In this article, a new iterative method of the rational type having fifth-order of accuracy is proposed to solve initial value problems. The method is self-starting, stable, consistent, and convergent, whereas local truncation error analysis has also ...
Sania Qureshi +5 more
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On a final value problem for a biparabolic equation with statistical discrete data
Applicable Analysis, 2020 This article is devoted to the study of final value problems for biparabolic equation with discrete data in two cases as the linear source and the nonlinear source, respectively. In each of the cases, we show the instability of the solutions and then establish approximate solutions by applying some regularization methods.
Nguyen Huy Tuan +3 more
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