共查询到20条相似文献,搜索用时 265 毫秒
1.
研究了一类具有状态依赖时滞的基因表达模型的Hopf分支问题.基于Rouche定理和Hopf分支定理,选取状态依赖时滞τ作为分支参数,发现当τ通过一系列临界值时,系统出现了Hopf分支.最后,对系统进行了数值仿真,数值仿真的结果验证了理论分析的正确性. 相似文献
2.
3.
建立了一个具有时滞和Ivlev功能性反应的食物链模型.同时选择了一个分支参数τ,分析了发生Hopf分支的情况,得出了Hopf分支发生的条件,并用数值模拟验证了分析结果. 相似文献
4.
研究了一类具有时滞和间接控制的捕食-被捕食模型.选择时滞τ为分支参数,证实了系统在一定的时滞范围内是渐近稳定的.当时滞τ通过一系列的临界值时,Hopf分支产生,即当时滞τ通过某些临界值时,从平衡点处产生一簇周期解.最后,用数值模拟验证了理论分析结果的正确性. 相似文献
5.
6.
《数学的实践与认识》2015,(22)
研究了一类具有时滞的男生追女生的动力学模型.通过选择时滞τ作为参数,发现当τ通过某个临界值时,Hopf分支产生,即从正平衡点处分支出一簇周期解.最后,利用数值模拟证实理论分析结果的正确性. 相似文献
7.
运用频域法研究了一类具有时滞的单模激光系统,选择时滞τ作为参数,当τ通过某个临界值时,Hopf分支产生,即从平衡点处分支出一簇周期解,最后,利用数值模拟证实理论分析结果的正确性. 相似文献
8.
《数学的实践与认识》2015,(13)
应用一种基于时滞反馈的分支控制方法,对一类具有时滞的商业周期模型的Hopf分支进行了控制.以时滞作为分支参数,当时滞达到某个阈值时,无控系统失去稳定性,Hopf分支产生:将时滞反馈控制器引入无控系统,可以使Hopf分支延迟发生或消失.数值仿真的结果验证了该方法的有效性. 相似文献
9.
应用一种基于时滞反馈的分支控制方法,对一类具有时滞的商业周期模型的Hopf分支进行了控制.以时滞作为分支参数,当时滞达到某个阈值时,无控系统失去稳定性,Hopf分支产生:将时滞反馈控制器引入无控系统,可以使Hopf分支延迟发生或消失.数值仿真的结果验证了该方法的有效性. 相似文献
10.
11.
12.
ZHENG ShiJun 《分析论及其应用》2004,20(3)
Schr(o)dinger operator is a central subject in the mathematical study of quantum mechanics.Consider the Schrodinger operator H = -△ V on R, where △ = d2/dx2 and the potential function V is real valued. In Fourier analysis, it is well-known that a square integrable function admits an expansion with exponentials as eigenfunctions of -△. A natural conjecture is that an L2 function admits a similar expansion in terms of "eigenfunctions" of H, a perturbation of the Laplacian (see [7], Ch. Ⅺ and the notes), under certain condition on V. 相似文献
13.
We study a class of self-similar processes with stationary increments belonging to higher order Wiener chaoses which are similar to Hermite processes. We obtain an almost sure wavelet-like expansion of these processes. This allows us to compute the pointwise and local Hölder regularity of sample paths and to analyse their behaviour at infinity. We also provide some results on the Hausdorff dimension of the range and graphs of multidimensional anisotropic self-similar processes with stationary increments defined by multiple Wiener–Itô integrals. 相似文献
14.
It is considered the class of Riemann surfaces with dimT1 = 0, where T1 is a subclass of exact harmonic forms which is one of the factors in the orthogonal decomposition of the spaceΩH of harmonic forms of the surface, namely The surfaces in the class OHD and the class of planar surfaces satisfy dimT1 = 0. A.Pfluger posed the question whether there might exist other surfaces outside those two classes. Here it is shown that in the case of finite genus g, we should look for a surface S with dimT1 = 0 among the surfaces of the form Sg\K , where Sg is a closed surface of genus g and K a compact set of positive harmonic measure with perfect components and very irregular boundary. 相似文献
15.
16.
《高校应用数学学报(英文版)》2014,29(4)
正Applied Mathematics-A Journal of Chinese Universities,Series B(Appl.Math.J.Chinese Univ.,Ser.B)is a comprehensive applied mathematics journal jointly sponsored by Zhejiang University,China Society for Industrial and Applied Mathematics,and Springer-Verlag.It is a quarterly journal with 相似文献
17.
《数学研究及应用》2014,(6)
正Journal overview:Journal of Mathematical Research with Applications(JMRA),formerly Journal of Mathematical Research and Exposition(JMRE)created in 1981,one of the transactions of China Society for Industrial and Applied Mathematics,is a home for original research papers of the highest quality in all areas of mathematics with applications.The target audience comprises:pure and applied mathematicians,graduate students in broad fields of sciences and technology,scientists and engineers interested in mathematics. 相似文献
18.
A cumulative-capacitated transportation problem is studied. The supply nodes and demand nodes are each chains. Shipments from a supply node to a demand node are possible only if the pair lies in a sublattice, or equivalently, in a staircase disjoint union of rectangles, of the product of the two chains. There are (lattice) superadditive upper bounds on the cumulative flows in all leading subrectangles of each rectangle. It is shown that there is a greatest cumulative flow formed by the natural generalization of the South-West Corner Rule that respects cumulative-flow capacities; it has maximum reward when the rewards are (lattice) superadditive; it is integer if the supplies, demands and capacities are integer; and it can be calculated myopically in linear time. The result is specialized to earlier work of Hoeffding (1940), Fréchet (1951), Lorentz (1953), Hoffman (1963) and Barnes and Hoffman (1985). Applications are given to extreme constrained bivariate distributions, optimal distribution with limited one-way product substitution and, generalizing results of Derman and Klein (1958), optimal sales with age-dependent rewards and capacities.To our friend, Philip Wolfe, with admiration and affection, on the occasion of his 65th birthday.Research was supported respectively by the IBM T.J. Watson and IBM Almaden Research Centers and is a minor revision of the IBM Research Report [6]. 相似文献
19.