Results 51 to 60 of about 9,356,932 (171)

Modeling exospheres: analytical and numerical methods with application examples

Frontiers in Astronomy and Space Sciences
Exospheres, the tenuous gas environments surrounding planets, planetary satellites, and cometary comae, play a significant role in mediating the interactions of these astronomical bodies with their surrounding space environments.
Valeriy Tenishev, Yinsi Shou, Yuni Lee, Yuni Lee, Yingjuan Ma, Michael R. Combi   +5 more
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Irreducible numerical semigroups with multiplicity three and four [PDF]

, 2011
In this paper we analyze the irreducibility of numerical semigroups with multiplicity up to four. Our approach uses the notion of Kunz-coordinates vector of a numerical semigroup recently introduced in (Blanco-Puerto, 2011).
Blanco, Víctor
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Numerical Solution of Stochastic Partial Differential Equations with Correlated Noise [PDF]

, 2013
In this paper we investigate the numerical solution of stochastic partial differential equations (SPDEs) for a wider class of stochastic equations. We focus on non-diagonal colored noise instead of the usual space-time white noise. By applying a spectral
Blömker, Dirk, Kamrani, Minoo
core   +1 more source

Modeling and Analysis of Material Flows in Re-Entrant Supply Chain Networks Using Modified Partial Differential Equations

Journal of Applied Mathematics, 2011
The basic partial differential equation (PDE) models for supply chain networks with re-entrant nodes and their macroscopic are proposed. However, through numerical examples, the basic continuum models do not perform well for multiple re-entrant systems ...
Fenglan He, Ming Dong, Xiaofeng Shao
doaj   +1 more source

An efficient numerical method for estimating the average free boundary velocity in an inhomogeneous Hele-Shaw problem [PDF]

, 2018
We develop a numerical method to estimate the average speed of the free boundary in a Hele-Shaw problem with periodic coefficients in both space and time. We test the accuracy of the method and present a few examples.
Palupi, Irma, Pozar, Norbert
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Modeling asteroid collisions and impact processes

, 2015
As a complement to experimental and theoretical approaches, numerical modeling has become an important component to study asteroid collisions and impact processes.
Holsapple, Keith, Jutzi, Martin, Michel, Patrick, Wünneman, Kai   +3 more
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Solving the inverse problem of high numerical aperture focusing using vector Slepian harmonics and vector Slepian multipole fields

, 2012
A technique using vector Slepian harmonics and multipole fields is presented for a general treatment of the inverse problem of high numerical aperture focusing.
Bokor, Braat, Braat, Chen, Chen, Devaney, Foreman, Jabbour, Jahn, Jahn, Kant, Kant, Kornél Jahn, Levy, Nándor Bokor, Sheppard, Sherif, Török, Wang, Wang, Wang, Wolf, Zhao   +22 more
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Higher-Order Fuzzy Difference Equations: Existence, Stability, and Illustrative Numerical Examples

Mathematics
This paper examines the dynamics of positive solutions to a system of fuzzy difference equations, which provide effective tools for modeling dynamical systems with uncertain or imprecise parameters.
Hashem Althagafi, Ahmed Ghezal
doaj   +1 more source

Jacobi rational–Gauss collocation method for Lane–Emden equations of astrophysical significance

Nonlinear Analysis, 2014
In this paper, a new spectral collocation method is applied to solve Lane–Emden equations on a semi-infinite domain. The method allows us to overcome difficulty in both the nonlinearity and the singularity inherent in such problems.
Eid H. Doha, Ali H. Bhrawy, Ramy M. Hafez, Robert A. Van Gorder   +3 more
doaj   +1 more source

Some numerical verification examples for plane stress elasto-viscoplasticity [PDF]

, 2019
This paper presents analytical, semi-analytical and numerical reference examples which can be employed for code verification of elasto-viscoplastic models under plane stress conditions.
Brezolin, Andrey, Dos Santos, Tiago, Rosa, Pedro A. R., Rossi, Rodrigo   +3 more
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