二阶非线性阻尼微分方程解的振动性质

本文研究了一类二阶非线性阻尼微分方程解的振动性,利用分类讨论和分析的方法,建立了两个新的振动性定理,推广和改进了已有的结果.     

二阶非线性阻尼微分方程解的振动性质

研究了一类二阶非线性阻尼微分方程解的振动性,采用分类讨论和分析的方法,建立了两个新的振动性定理,推广和改进了已有的结果.     

二阶非线性阻尼微分方程的振动性判据

的振动性问题的研究从Atkinson的开创性工作以来发展很快,已有了不少重要的结果。Wong和Kartsatos先后对这方面的工作作了很好的总结。 最近,Yeh得到了二阶非线性阻尼方程     

一类二阶非线性阻尼微分方程解的振动性质

研究了一类二阶非线性阻尼微分方程解的振动性质.在一定条件下,建立了四个新的振动性定理,推广和改进了已知的结果.     

带有阻尼项的二阶非线性微分方程的振动性

利用一类Φ(t,s,l)型的新函数,对带有阻尼项的二阶非线性微分方程建立了新的振动准则,推广和改进了已有的一些振动结果.     

一类二阶非线性泛函微分方程的振动性

讨论了一类二阶非线性泛函微分方程的振动性,得到了该类方程所有解振动的新的充分条件,改进并推广了已有的结果.     

一类二阶非线性时滞微分方程的振动性

利用广义的Riccati变换、积分均值等方法,讨论了一类二阶非线性时滞微分方程的振动性,建立了方程所有解振动的充分条件,改进和推广了已有文献中的某些结论,并给出了两个数值实例说明主要结果.     

非线性二阶阻尼微分方程的振动定理

考虑带有非线性阻尼项的一类二阶微分方程的振动性质.在一般的假设下我们建立了这类方程的若干新的振动准则.所得结果推广和改进了文献中的某些结果.     

一类二阶非线性脉冲微分方程解的振动性

讨论了一类二阶非线性脉冲微分方程解的振动性质,并得到了这类方程解的振动的一组充分条件.     

一类二阶非线性脉冲时滞微分方程的振动性

研究了一类二阶非线性脉冲时滞微分方程的振动性,分别运用引入参数函数和Lakshmikantham等人建立的脉冲微分不等式,得到了几个充分性判据,并改进了一些已知结果.     

OSCILLATION FOR A CLASS OF SECOND ORDER DELAY DIFFERENTIAL EQUATIONS WITH NONLINEAR NEUTRAL TERM

By the averaging technique,we establish some oscillation theorems for a class of second order delay differential equations with nonlinear neutral term,the results obtained extend some known results in the previous literatures.     

二阶非线性中立型微分方程的振动性

利用广义Riccati变换和权函数积分平均技巧,建立了非线性时滞中立型方程:[r(t)(x(t)-p(t)x(t-τ))']'+q(t)f(x(t-δ))h(x'(t))=0的振动准则,其中τ和δ是非负常数,a,p,q∈C([to,∞),R),f和h∈C(R,R).这些结果补充了大量存在性结论和处理以前结果不能解决的问题.特别地,以实例说明本文结果是实质性推广.     

OSCILLATION FOR A CLASS OF SECOND-ORDER NONLINEAR DIFFERENTIAL EQUATIONS WITH IMPULSES

This paper discusses the oscillation of second-order nonlinear differential equations with impulses.Sufficient conditions for all solutions of the equation to be oscillated are obtained.     

OSCILLATION THEOREMS FOR A CLASS OF SECOND ORDER NEUTRAL DIFFERENTIAL EQUATIONS OF EMDEN-FOWLER TYPE

Some oscillation theorems are established by the averaging technique for a class of second order neutral differential equations of Emden-Fowler type. Our results essentially improve some known results in the previous literature.     

OSCILLATION CRITERIA FOR A CLASS OF HIGHER ORDER NEUTRAL DIFFERENTIAL EQUATIONS

We establish a new oscillation condition for even order neutral type differential equation of the following formwhere f is continuous and exists 1 ≤ k ≤ m(?)(t) ≡ Tk(t), a, (?)i ∈ C([0, ∞], R), i = 1, …,m. such that 0 ≤ a(t) ≤ L and     

OSCILLATION CRITERIA FOR SECOND ORDER QUASILINEAR DIFFERENTIAL EQUATIONS

1 IntroductionThis paper is concerned with the problem of oscillation of second-orderquasilinear differential equationsFOr equation (1), the following conditions, which are referred to (FO), arealways assumed to be valid(a) a > 0 is a constant;(b) F: [to, co) x R x R x R x R - R is a continuous function;(c) sgn F(t, x) u? v3 w) = sgn x for each t 2 to and x, u? v? w E R,(d) r(t) E C([to, co); (0, co)) and jco ddt = co.' (e) T: [to, co) - R is continuous, T(t) 5 t for t 2 to and ill7T(t)…     

OSCILLATION THEOREMS FOR SECOND ORDER NONLINEAR DELAY DIFFERENTIAL EQUATIONS

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OSCILLATION RESULTS FOR A SECOND ORDER NEUTRAL DELAY DIFFERENTIAL EQUATIONS

Some new oscillation criteria are established for a second order neutral delay differential equations. These results improve oscillation results of Y.V. Rogo-vchenko for the retarded delay differential equations. The relevance of our theorems is illustrated with two carefully selected examples.     

OSCILLATIONS OF SECOND ORDER DIFFERENTIAL EQUATIONS WITH IMPULSES

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