搜索结果: 1-15 共查到“理学 non-autonomous”相关记录15条 . 查询时间(0.205 秒)
Homoclinic solutions for a class of non-autonomous Hamiltonian systems with potential changing sign
Homoclinic solutions Critical point Variational methods
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2011/10/12
In this paper we are devoted to considering the existence of homoclinic solutions for some second order non-autonomous Hamiltonian system with the potential changing sign. The proof is based on the st...
Existence of subharmonic periodic solutions to a class of second-ordernonlinear non-autonomous mixed-type functional differentialequations
variational structure critical points operator equations subdifferentiability subharmonic periodic solutions second-order mixed-type nonlinearfunctional differential equations
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2011/10/11
In this paper, by introducingsubdifferentiability of lower semicontinuous convex functions and the conjugate functions, as well as critical point theory and operator equations theory, we obtain multip...
The non-autonomous chiral model and the Ernst equation of General Relativity in the bidifferential calculus framework
non-autonomous chiral model bidifferential calculus framework Ernst equation General Relativity
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2011/7/7
We generate exact solutions of the non-autonomous chiral model, which in particular arises in General Relativity, using a general result of the bidifferential calculus approach to integrable PDDEs. In...
The non-autonomous chiral model and the Ernst equation of General Relativity in the bidifferential calculus framework
non-autonomous chiral model bidifferential calculus framework Ernst equation General Relativity
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2011/7/7
We generate exact solutions of the non-autonomous chiral model, which in particular arises in General Relativity, using a general result of the bidifferential calculus approach to integrable PDDEs. In...
The non-autonomous chiral model and the Ernst equation of General Relativity in the bidifferential calculus framework
The non-autonomous chiral model he Ernst equation the bidifferential calculus framework
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2011/7/28
Abstract: We generate exact solutions of the non-autonomous chiral model, which in particular arises in General Relativity, using a general result of the bidifferential calculus approach to integrable...
Periodic orbits of a one dimensional non autonomous Hamiltonian system
Morse theory periodic orbits twisting number
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2011/2/28
In this paper we study the properties of the periodic orbits of x + V 0 x(t; x) = 0 with x 2 S1 and V 0 x (t; x) a T0 periodic potential.
Integrability and non-integrability of periodic non-autonomous Lyness recurrences
Periodic di erence equations integrability non-integrability
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2011/2/25
This paper studies non-autonomous Lyness type recurrences of the form xn+2 =(an + xn)=xn+1, where fangn is a k-periodic sequence of positive numbers with prime period k. We show that for the cases k 2...
Vertex operator for the non-autonomous ultradiscrete KP equation
Vertex operator non-autonomous ultradiscrete KP equation
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2010/4/7
We propose an ultradiscrete analogue of the vertex operator in the case of the ultradiscrete KP equation--several other ultradiscrete equations--which maps N-soliton solutions to N+1-soliton ones.
Finite-time synchronization of non-autonomous chaotic systems with unknown parameters
non-autonomous chaotic systems unknown parameters
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2010/4/7
Adaptive control technique is adopted to synchronize two identical non-autonomous systems with unknown parameters in finite time. A virtual unknown parameter is introduced in order to avoid the unknow...
Non-autonomous Differential Subordinations Related to a Sector
Univalent function Starlike function Subordination Differential subordination
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2008/6/27
Non-autonomous Differential Subordinations Related to a Sector.
A time discrete linear model of population structured by age and the time of residence: Non-autonomous case
Population dynamics migration strong ergodicity
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2010/9/15
The model we propose is a generalization of the linear discrete model to the case of time varying environment. We present a time discrete time varying model of the dynamics of a population structured ...
Sufficient Conditions for the Oscillation of Non-autonomous Difference Equations
Non-autonomous difference equation oscillation
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2007/12/10
In this paper, we obtain sufficient conditions for the oscillation of the non-autonomous difference equations x(n+1)-x(n)+∑ from (i=1) to m of pi(n)x(n-τ_i)(n)=0,which are the discrete analog of the d...
Global Attracting Behavior of Non-autonomous Stage-structured Population Dynamical System with Diffusion
nonautonomous stage structure dispersal
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2007/12/10
A non-autonomous single species dispersal model is considered, in which individual member of the population has a life history that goes through two stages, immature and mature. By applying the theory...
Periodic Solutions of a Second Order Non-autonomous Differential System
non-autonomous lienard system periodic solution
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2007/12/10
This paper gives new sufficient conditions for the existence of periodic solutions of a second order non-autonomous differential system by using Mawhin's coincidence degree theory and Brousk's theorem...
THE STABILITY OF NON-AUTONOMOUS DELAY SYSTEMS
Asymptotic stability difference-differe
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2007/8/7
The objective of the paper is to derive new simple criteria for the stability of a linear non-autonomous delay system by using a difference-differential inequality.