共查询到20条相似文献,搜索用时 656 毫秒
1.
In this paper we study nonlinear, discrete, multipoint boundary value problems of the form
x(t+1)=A(t)x(t)+?f(t,x(t)) 相似文献
2.
Tiziana Cardinali 《Journal of Mathematical Analysis and Applications》2005,308(2):620-635
In this paper we deal with a Cauchy problem governed by the following semilinear evolution differential inclusion:
x′(t)∈A(t)x(t)+F(t,x(t)) 相似文献
3.
The reaction-diffusion delay differential equation
ut(x,t)−uxx(x,t)=g(x,u(x,t),u(x,t−τ)) 相似文献
4.
X.H. Tang 《Journal of Mathematical Analysis and Applications》2005,301(2):313-335
In this paper, sufficient conditions are established for the asymptotical behavior of solutions of the delay differential equation
x′(t)=F(t,xt)+G(t,xt) 相似文献
5.
By means of Mawhin's continuation theorem, we study some second order differential equations with a deviating argument:
x″(t)=f(t,x(t),x(t−τ(t)),x′(t))+e(t). 相似文献
6.
In this paper, we consider the second-order nonlinear delay dynamic equation
(r(t)xΔ(t)Δ)+p(t)f(x(τ(t)))=0, 相似文献
7.
In this paper, we investigate a class of stochastic functional differential equations of the form
dx(t)=(Ax(t)+F(t,x(t),xt))dt+G(t,x(t),xt)°dW(t). 相似文献
8.
Philippe Cieutat 《Journal of Mathematical Analysis and Applications》2009,354(2):494-2634
We give sufficient conditions ensuring the existence, uniqueness and global attractiveness of a pseudo compact almost automorphic solution of the following differential equation:
x′(t)=f(t,x(t)) 相似文献
9.
Hassan A. El-Morshedy 《Nonlinear Analysis: Theory, Methods & Applications》2011,74(10):3353-3362
This paper contains new estimates for the distance between adjacent zeros of solutions of the first order delay differential equation
x′(t)+p(t)x(t−τ)=0 相似文献
10.
In this paper, the Fokas unified method is used to analyze the initial-boundary value for the Chen- Lee-Liu equation on the half line (?∞, 0] with decaying initial value. Assuming that the solution u(x, t) exists, we show that it can be represented in terms of the solution of a matrix Riemann-Hilbert problem formulated in the plane of the complex spectral parameter λ. The jump matrix has explicit (x, t) dependence and is given in terms of the spectral functions {a(λ), b(λ)} and {A(λ), B(λ)}, which are obtained from the initial data u0(x) = u(x, 0) and the boundary data g0(t) = u(0, t), g1(t) = ux(0, t), respectively. The spectral functions are not independent, but satisfy a so-called global relation.
相似文献
$i{\partial _t}u + {\partial_{xx}u - i |u{|^2}{\partial _x}u = 0}$
11.
Mustafa Hasanbulli 《Applied mathematics and computation》2010,215(12):4392-4399
By refining the standard integral averaging technique, we obtain new oscillation criteria for a class of second order nonlinear neutral differential equations of the form
(r(t)(x(t)+p(t)x(t-τ))′)′+q(t)f(x(t),x(σ(t)))=0. 相似文献
12.
Taher S. Hassan 《Journal of Mathematical Analysis and Applications》2008,345(1):176-185
This paper is concerned with oscillation of the second-order half-linear dynamic equation
(r(t)(xΔγ)Δ)+p(t)xγ(t)=0, 相似文献
13.
Taher S. Hassan 《Applied mathematics and computation》2011,217(12):5285-5297
The purpose of this paper to establish oscillation criteria for second order nonlinear dynamic equation
(r(t)(xΔ(t))γ)Δ+f(t,x(g(t)))=0, 相似文献
14.
X.H. Tang 《Journal of Mathematical Analysis and Applications》2006,322(2):864-872
In this paper, we proved that the odd order nonlinear neutral delay differential equation
[x(t)−p(t)g(x(t−τ))](n)+q(t)h(x(t−σ))=0 相似文献
15.
Hong Gao 《Applied mathematics and computation》2009,211(1):148-154
In this paper, we use the coincidence degree theory to establish new results on the existence and uniqueness of T-periodic solutions for a kind of forced Rayleigh equation of the form
x″+f(x′(t))+g(t,x(t))=e(t). 相似文献
16.
In this paper, we employ fixed point theorem and functional equation theory to study the existence of positive periodic solutions of the delay differential equation
x′(t)=α(t)x(t)-β(t)x2(t)+γ(t)x(t-τ(t))x(t). 相似文献
17.
In this paper we study the equation of viscoelasticity
utt−uxxt−Fx(ux)=f(x,t) 相似文献
18.
Seshadev Padhi 《Applied mathematics and computation》2010,216(8):2450-2456
This paper is concerned with the existence of three positive T-periodic solutions of the first order functional differential equations of the form
x′(t)=a(t)x(t)-λb(t)f(t,x(h(t))), 相似文献
19.
In this paper we study the existence of positive solutions of the equation
(φ(x′))′+a(t)f(x(t))=0, 相似文献
20.
Spectral theory of isotropic random fields in Euclidean space developed by M. I. Yadrenko is exploited to find a solution to the problem of optimal linear estimation of the functionalwhich depends on unknown values of a periodically correlated (cyclostationary with period T) with respect to time isotropic on the sphere S n in Euclidean space E n random field ζ(t, x), t?∈?Z, x?∈?S n . Estimates are based on observations of the field ζ(t, x)?+?θ(t, x) at points (t, x), t?=???1,???2, ..., x?∈?S n , where θ(t, x) is an uncorrelated with ζ(t, x) periodically correlated with respect to time isotropic on the sphere S n random field. Formulas for computing the value of the mean-square error and the spectral characteristic of the optimal linear estimate of the functional Aζ are obtained. The least favourable spectral densities and the minimax (robust) spectral characteristics of the optimal estimates of the functional Aζ are determined for some special classes of spectral densities.
相似文献
$$ A\zeta ={\sum\limits_{t=0}^{\infty}}\,\,\,{\int_{S_n}} \,\,a(t,x)\zeta (t,x)\,m_n(dx) $$