共查询到20条相似文献,搜索用时 31 毫秒
1.
Canonical process is a type of uncertain process with stationary and independent increments which are normal uncertain variables, and uncertain differential equation is a type of differential equation driven by canonical process. This paper will give a theorem on the Lipschitz continuity of canonical process based on which this paper will also provide a sufficient condition for an uncertain differential equation being stable. 相似文献
2.
杨喜陶 《数学物理学报(A辑)》2008,28(5):870-878
作者通过Liapunov泛函建立了一类高维差分方程解一致稳定、一致渐近稳定及指数渐近稳定的充要条件. 此外, 作者还证明了解的一致渐近稳定性蕴含解的有界性, 同时也给出了概周期差分方程存在概周期解的一个充分条件. 相似文献
3.
This paper devotes to study the oscillatory behavior of solutions of a first order nonlinear impulsive differential equation with mixed argument. First, without assuming the deviating argument to be retarded or advanced, a sufficient condition is established for all solutions of the differential equation to be oscillatory. Next, a sufficient condition for the differential equation to have nonoscillatoty solution is given. Finally, a sufficient and necessary condition for all solutions of the differential equation to be oscillatory is obtained. 相似文献
4.
First hitting criteria of a system are to initially achieve some performance indeces of the target state set. This paper primarily investigates the optimal control problem of the uncertain second‐order circuit based on first hitting criteria. First, considering time efficiency and different from the ordinary expected utility criterion over an infinite time horizon, two first hitting criteria which are reliability index and reliable time criteria are innovatively proposed. Second, assuming the circuit output voltage as an uncertain variable when the historical data is lacking, we better model the real circuit system with the uncertain second‐order differential equation which is essentially the uncertain fractional‐order differential equation. Then, based on the first hitting time theorem of the uncertain fractional‐order differential equation, the distribution function of the first hitting time under the second‐order circuit system is proposed and the uncertain second‐order circuit optimal control model (reliability index and reliable time‐based model) is transformed into corresponding crisp optimal problem. Lastly, analytic expressions of the optimal control for the reliability index model are obtained. Meanwhile, sufficient condition and guidance for parameters for the optimal solution of the reliable time‐based model are derived, and corresponding numerical examples are also given to demonstrate the fluctuation of our optimal solution for different parameters. 相似文献
5.
Canonical process is a Lipschitz continuous uncertain process with stationary and independent increments, and uncertain differential equation is a type of differential equations driven by canonical process. This paper presents some methods to solve linear uncertain differential equations, and proves an existence and uniqueness theorem of solution for uncertain differential equation under Lipschitz condition and linear growth condition. 相似文献
6.
应用构造Ляпунов函数的方法,讨论了非线性微分方程系概周期解的存在唯一性.同时给出了Liénard方程存在唯一概周期解的一组充分条件. 相似文献
7.
Ni Hua Lin Faxing 《Annals of Differential Equations》2007,23(2):173-179
By using the ordinary dichotomy and theory of stability,we study the nonli- near differential equation and obtain some sufficient conditions which guarantee the existence and stability of almost periodic solution for the nonlinear diffe- rential equation. 相似文献
8.
变系数线性齐次常微分方程组的λ-矩阵求解法 总被引:3,自引:0,他引:3
李建湘 《数学的实践与认识》2002,32(3):470-475
进一步讨论了微分变换矩阵的性质 ,指出了变系数线性齐次微分方程组 ,通过因变量变换化为常系数线性齐次方程组的充要条件 相似文献
9.
K Narita 《Journal of Mathematical Analysis and Applications》1984,104(2):418-427
In this paper a sufficient condition is given for the existence of the global solution as is a sufficient condition for the non-existence of the global solution of the second-order stochastic differential equation with the random disturbance of the so-called white noise. 相似文献
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11.
二阶延迟微分方程θ-方法的TH-稳定性 总被引:2,自引:1,他引:1
This paper is concerned with the TH-stability of second order delay differential equation. A sufficient condition such that the system is asymptotically stable is derived. Furthermore, a sufficient condition is obtained for the hnear θ-method to be TH-stable. Finally, the plot of stability region for the particular case is presented. 相似文献
12.
The paper is devoted to studying an abstract functional differential equation by a nonlinear semigroup approach. We first prove in details the equivalence of the well posedness of an abstract functional differential equation and an associated abstract Cauchy problem in the sense of strong solutions. Secondly, a sufficient condition is derived for well posedness of the abstract functional differential equation. Thirdly, we present principles of linearized stability for the abstract functional differential equation. Finally, the results obtained are applied to a reaction-diffusion equation with delays. 相似文献
13.
鲁红英 《高校应用数学学报(A辑)》2022,(1):79-90
研究了一类时标上带有反馈控制的两种群竞争系统的概周期解的存在性与稳定性.首先应用微分不等式和比较原理得到了该系统的持久性.在此基础上,通过构造了一个合适的Lyapunov泛函,得到该系统存在唯一一致渐近稳定正概周期解的充分条件.文中对以前的相关文献研究结果进行了推广. 相似文献
14.
一类具连续分布滞量的高阶偏微分方程的振动性 总被引:1,自引:0,他引:1
杨柳 《数学的实践与认识》2008,38(13)
研究一类具有连续分布滞量中立项的非线性偏微分方程解的振动性,得到该方程在给定边值条件下振动和非振动的一些充分条件. 相似文献
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Abdelouaheb Ardjouni Ahcene Djoudi 《Nonlinear Analysis: Theory, Methods & Applications》2011,74(6):2062-2070
In this paper we consider the asymptotic stability of a generalized linear neutral differential equation with variable delays by using the fixed point theory. An asymptotic stability theorem with a necessary and sufficient condition is proved, which improves and generalizes some results due to Burton (2003) [3], Zhang (2005) [14], Raffoul (2004) [13], and Jin and Luo (2008) [12]. Two examples are also given to illustrate our results. 相似文献
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18.
This paper is concerned with optimal control problem whose state equation is an uncertain differential equation. A necessary condition of optimality for uncertain optimal control problem is presented by using classical variational method. Meanwhile, an existence theorem of solution to backward uncertain differential equation is proved. 相似文献
19.
So far a necessary and sufficient condition for the global asymptotic stability of linear mixed monotone delayed differential equation with time varying delay has been presented. However, several basic tools utilized for that proof are not restricted to linear functions. Here it is proved that similar results are obtained for the global asymptotic properties of nonlinear delay differential equation with analogous properties. 相似文献
20.
John A. D. Appleby 《Stochastics An International Journal of Probability and Stochastic Processes》2013,85(3):271-295
The paper studies the almost sure asymptotic convergence to zero of solutions of perturbed linear stochastic differential equations, where the unperturbed equation has an equilibrium at zero, and all solutions of the unperturbed equation tend to zero, almost surely. The perturbation is present in the drift term, and both drift and diffusion coefficients are state‐dependent. We determine necessary and sufficient conditions for the almost sure convergence of solutions to the equilibrium of the unperturbed equation. In particular, a critical polynomial rate of decay of the perturbation is identified, such that solutions of equations in which the perturbation tends to zero more quickly that this rate are almost surely asymptotically stable, while solutions of equations with perturbations decaying more slowly that this critical rate are not asymptotically stable. As a result, the integrability or convergence to zero of the perturbation is not by itself sufficient to guarantee the asymptotic stability of solutions when the stochastic equation with the perturbing term is asymptotically stable. Rates of decay when the perturbation is subexponential are also studied, as well as necessary and sufficient conditions for exponential stability. 相似文献