Results 51 to 60 of about 10,933,350 (231)

Solar sail trajectories at the Earth-Moon Lagrange points [PDF]

open access: yes, 2008
Paper presented during Session 3, Orbital Dynamics, Symposium C1, Astrodynamics, Paper Number 13. This paper investigates displaced periodic orbits at linear order in the circular restricted Earth-Moon system, where the third massless body is a solar ...
McInnes, Colin R., Simo, Jules
core  

Complex periodic potentials with real band spectra

open access: yes, 1998
This paper demonstrates that complex PT-symmetric periodic potentials possess real band spectra. However, there are significant qualitative differences in the band structure for these potentials when compared with conventional real periodic potentials ...
Belokolos   +14 more
core   +1 more source

Fractional-order differential equations with anti-periodic boundary conditions: a survey

open access: yes, 2017
We will present an up-to-date review on anti-periodic boundary value problems of fractional-order differential equations and inclusions. Some recent and new results on nonlinear coupled fractional differential equations supplemented with coupled anti ...
R. Agarwal, B. Ahmad, A. Alsaedi
semanticscholar   +1 more source

Second-order homogenization of periodic materials based on asymptotic approximation of the strain energy: formulation and validity limits [PDF]

open access: yes, 2014
In this paper a second-order homogenization approach for periodic material is derived from an appropriate representation of the down-scaling that correlates the micro-displacement field to the macro-displacement field and the macro-strain tensors ...
A. Bacigalupo
semanticscholar   +1 more source

On Periodic Solutions of Higher-Order Functional Differential Equations

open access: yesBoundary Value Problems, 2008
For higher-order functional differential equations and, particularly, for nonautonomous differential equations with deviated arguments, new sufficient conditions for the existence and uniqueness of a periodic solution are established.
B. Půža   +2 more
doaj   +2 more sources

New periodic orbits in the solar sail restricted three body problem [PDF]

open access: yes, 2008
In this paper we consider periodic orbits of a solar sail in the Earth-Sun restricted three-body problem. In particular, we consider orbits which are high above the ecliptic plane, in contrast to the classical Halo orbits about the collinear equilibria ...
Biggs, J.D., McInnes, C., Waters, Thomas
core  

High-Order Variational Calculation for the Frequency of Time-Periodic Solutions

open access: yes, 2002
We develop a convergent variational perturbation theory for the frequency of time-periodic solutions of nonlinear dynamical systems. The power of the theory is illustrated by applying it to the Duffing oscillator.Comment: Author Information under http ...
Axel Pelster   +8 more
core   +1 more source

Bounded and periodic solutions to the linear first-order difference equation on the integer domain

open access: yes, 2017
The existence of bounded solutions to the linear first-order difference equation on the set of all integers is studied. Some sufficient conditions for the existence of solutions converging to zero when n→−∞$n\to -\infty$, as well as when n→+∞$n\to+\infty$
S. Stević
semanticscholar   +1 more source

Monotone flows with dense periodic orbits [PDF]

open access: yes, 2018
The main result is Theorem 1: A flow on a connected open set X ⊂ Rd is globally periodic provided (i) periodic points are dense in X, and (ii) at all positive times the flow preserves the partial order defined by a closed convex cone that has nonempty ...
Hirsch, MW
core   +1 more source

Forward Symplectic Integrators and the Long Time Phase Error in Periodic Motions

open access: yes, 2005
We show that when time-reversible symplectic algorithms are used to solve periodic motions, the energy error after one period is generally two orders higher than that of the algorithm.
B. Cano   +13 more
core   +4 more sources

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