排序方式: 共有24条查询结果,搜索用时 15 毫秒
1.
1 IntroductionThe problem of periodic solutions of nonlineax dtherential equations has been one Of thecenter problem to the tI1eory of differelltial equatiol1, it 11as wide application baCkground(8uchas fOrce oscillatioll of telecomnmnication, periodic euvironment in econondc system, etc.), soit has been a popular subject in the research work. In this paperl we discuss the problem ofperiodic solutions of the fOllowing nolllinear lleutral functional differential equatiollsd,dtD(ft xt) = f(f, … 相似文献
2.
By utilizing a fixed point theorem on cone,some new results on the existence of positive periodic solutions for nonautonomous differential equations with delay are derived. 相似文献
3.
一类无穷时滞微分系统的周期解和全局渐近稳定性 总被引:2,自引:0,他引:2
利用重合度理论中的延拓定理和微分不等式讨论一类无穷时滞微分系统的周期解的存在性和全局渐近稳定性,获得了简便的判别条件. 相似文献
4.
无穷时滞泛函微分方程的正周期解 总被引:6,自引:0,他引:6
利用范数形式的锥拉伸和锥压缩不动点定理讨论具有无穷时滞泛函微分方程的周期解问题,获得了正周期解的存在性定理,并给出了定理的若干应用. 相似文献
5.
OSCILLATIONSOFODDORDERNEUTRALDIFFERENTIALEQUATIONS朱思铭,彭世国中同大学,邮编:510275OSCILLATIONSOFODDORDERNEUTRALDIFFERENTIALEQUATIONS¥Zhu... 相似文献
6.
考虑具有周期扰动的Linard型非保守系统 +C+gradG(x)=p(t),其中C是n×n的实对称方阵,x=(x_1,x_2,…x_n)~T∈R~n,G∈C~2(R~n,R),p∈C(R,R~n)且p(t+ω)≡p(t),ω>0是常数,利用重合度理论讨论周期解的存在性与唯一性,得到了苦干简便的判别条件。 相似文献
7.
We observe characteristic atomic behaviors in the Bose-Einstein-condensation-Bardeen-Cooper-Schrieffer(BEC-BCS)crossover,by accurately tuning the magnetic field across the Feshbach resonance of lithium atoms.The magnetic field is calibrated by measuring the Zeeman shift of the optical transition.A non-monotonic anisotropic expansion is observed across the Feshbach resonance.The density distribution is explored in different interacting regimes,where a condensate of diatomic molecules forms in the BEC limit with the indication of a bimodal distribution.We also measure the three-body recombination atom loss in the BEC-BCS crossover,and find that the magnetic field of the maximum atom loss is in the BEC limit and gets closer to the Feshbach resonance when decreasing the atom temperature,which agrees with previous experiments and theoretical prediction.This work builds up a controllable platform for the study on the strongly interacting Fermi gas. 相似文献
8.
具有偏差变元的p-Laplacian中立型Liénard方程的周期解 总被引:1,自引:0,他引:1
利用重合度理论中的延拓定理,给出了具有偏差变元的 p-Laplaciaa 中立型 Liénard 方程存在周期解的判别条件. 相似文献
9.
Impulsive control for Takagi--Sugeno fuzzy model with time-delay and its application to chaotic system 下载免费PDF全文
A control approach where the fuzzy logic methodology is combined with impulsive control is developed for controlling some time-delay chaotic systems in this paper.We first introduce impulses into each subsystem with delay of the Takagi-Sugeno(TS) fuzzy IF-THEN rules and then present a unified TS impulsive fuzzy model with delay for chaos control.Based on the new model,a simple and unified set of conditions for controlling chaotic systems is derived by the Lyapunov-Razumikhin method,and a design procedure for estimating bounds on control matrices is also given.Several numerical examples are presented to illustrate the effectiveness of this method. 相似文献
10.
周期扰动的非保守系统的周期解的存在性与唯一性 总被引:3,自引:0,他引:3
考虑具有周期扰动的Lienard型非保守系统x+Cx+gradG(x)=p(t),其中C是n×n的实对称方阵,x=(x1,x2,…,xn)T∈Rn,G∈C2(Rn,R),p∈C(R,Rn)且p(t+ω)≡p(t),ω>0是常数,利用重合度理论讨论周期解的存在性与唯一性,得到了若干简便的判别条件. 相似文献