共查询到19条相似文献,搜索用时 62 毫秒
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利用Mawhin连续性定理研究了具有多偏差变元的Rayleigh方程周期解的存在性,得到了一些新的结果,补充和完善了已有的结果. 相似文献
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一类具时滞高阶Rayleigh方程的周期解的先验界性 总被引:3,自引:0,他引:3
本文首先建立了一类具时滞高阶Bayleigh方程的周期解的先验有界性.进而,借助这些有界性,并利用Mawhin连续定理获得了周期解的存在性定理. 相似文献
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该文利用拓扑度方法研究了一类时滞依赖状态的广义Duffing型泛函微分方程x'(t)$ 该文利用拓扑度方法研究了一类时滞依赖状态的广义Duffing型泛函微分方程x'(t)$ 该文利用拓扑度方法研究了一类时滞依赖状态的广义Duffing型泛函微分方程x'(t) g(x(t-τ(t,x(t))))=f(t)周期解的存在性,得到了方程周期解存在的充分条件和必要条件.研究了当滞量为常值时,方程周期解的存在唯一性.并且给出了所研究问题的一个应用实例. 相似文献
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一类具偏差变元Rayleigh方程周期解的存在性 总被引:3,自引:0,他引:3
作者研究一类具偏差变元Ralyleigh方程周期解的存在性问题,利用重合度拓展定理得到了周期解存在性结论.有意义的是本文周期解先验界估计的方法与已有的工作均不相同. 相似文献
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时滞Rayleigh方程周期解问题 总被引:2,自引:2,他引:0
利用Mahwin重合度拓展定理研究了一类具时滞Rayleigh方程x″(t)+f(x′(t))+g∫0-rx(t+s)dm(s)=p(t)周期解问题,得到了周期解存在的一组充分条件. 相似文献
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In the present paper,we consider the existence of positive periodic solu-tions for a kind of delay Logistic equations.By using a fixed point theorem in cones,we give some new existence results of single and multiple positive periodic solutionsfor a kind of delay Logistic equations.Some biomathematical models are presentedto illustrate our results. 相似文献
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姚晓洁 《数学的实践与认识》2011,41(16)
利用Mawhin重合度拓展定理,获得了一类具偏差变元的高阶中立型Rayleigh方程(x(t)-(?)c_lx(t-r_l))~(k)+(?)α_i(t)f(x′(t-μ_i(t)))+(?)β_j(t)g(x(t-τ_j(t)))=p(t)周期解存在性的充分条件,推广和改进了已有文献的相关结果. 相似文献
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Xingrong Chen Dept. of Math. Jiaying University Meizhou Guangdong 《Annals of Differential Equations》2010,(1):1-9
By employing the coincidence degree theory of Mawhin, we study the existence of periodic solutions to a kind of Rayleigh equation with a deviating argument and impulses. Some new results on the existence of periodic solutions to the equation are obtained. 相似文献
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本文研究了一类具类p-Laplacian项Liénard微分方程.应用广义Borsuk定理,在系数c(t)为非常值函数的情况下,得到了该方程周期解存在性的一个新的结果.Abstract: In this article,we study a kind of p-Laplacian-like Liénard differential equation.By using the generalized Borsuk theorem in coincidence degree theory,a new result on the existence of its periodic solution is obtained in the case that the cofficient c(t)is not a constant function. 相似文献
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1 IntroductionEquationor its nonhomogeneous formwhere p, q) r and w are constants, originated with the study of aerodinamica.And then as its generalization, forced Rayleigh equationespecially its periodic solution has been studied by many authors. For example,R.Reissig [1], proved equation (1.1) has at least one w-periodic solution underthe following conditionsi) F(v), g(x) and e(t) are continuous functions;n) Suppose that m 5 0 5 M, and that there exists a positive number V,such that when … 相似文献
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Jianzhong Xu Zongfu Zhou .Dept.of Math. Bozhou Teachers College Bozhou Anhui . 《Annals of Differential Equations》2012,(1):105-114
In this paper,we use the Leray-Schauder degree theory to establish some new results on the existence and uniqueness of anti-periodic solutions to an nth-order nonlinear differential equation with multiple deviating arguments. 相似文献
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本文利用Fourier级数理论和Mawhin重合度拓展定理研究一类中立型泛函微分方程的周期解存在性问题.在其对应的特征方程具有零特征根的条件下,得到了周期解存在性的新结果. 相似文献
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THE EXISTENCE AND UNIQUENESS AND STABILITY OF ALMOST PERIODIC SOLUTIONS FOR FUNCTIONAL DIFFERENTIAL EQUATIONS WITH INFINITE DELAYS 总被引:1,自引:0,他引:1
Wang Quanyi 《数学年刊B辑(英文版)》1997,18(2):233-242
THEEXISTENCEANDUNIQUENESSANDSTABILITYOFALMOSTPERIODICSOLUTIONSFORFUNCTIONALDIFFERENTIALEQUATIONSWITHINFINITEDELAYSWANGQUANHNY... 相似文献
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Wu Xiaofei 《Annals of Differential Equations》2008,(4):419-426
In this paper, using fixed point theorem, we discuss a higher dimensional nonautonomous periodic system with delay and give some suffcient criteria for the existence and uniqueness of periodic solution. Our results extend and improve some results in previous researches. 相似文献
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具脉冲时滞的Duffing型方程的周期解 总被引:9,自引:0,他引:9
利用Mawhin重合度理论,研究了脉冲时滞Duffing型方程的周期解的存在性.本 文结果即使对相应的非脉冲Duffing型方程也是新的. 相似文献