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1.
具有GARCH-skew-t误差项的时序的单位根检验   总被引:3,自引:0,他引:3  
本文通过随机模拟,分析条件分布为偏t分布、具有自回归条件异方差误差项的时间序列的ADF单位根检验的临界值、检验的有效性和实际显著水平的扭曲分析。结果显示,随着波动持久性的增强,已不能直接使用Fu ller的临界值表。  相似文献
2.
Global dynamics of SIS models with transport-related infection   总被引:1,自引:0,他引:1  
To understand the effect of transport-related infection on disease spread, an epidemic model for several regions which are connected by transportation of individuals has been proposed by Cui, Takeuchi and Saito [J. Cui, Y. Takeuchi, Y. Saito, Spreading disease with transport-related infection, J. Theoret. Biol. 239 (2006) 376-390]. Transportation among regions is one of the main factors which affects the outbreak of diseases. The purpose of this paper is the further study of the local asymptotic stability of the endemic equilibrium and the global dynamics of the system. Sufficient conditions are established for global asymptotic stability of the endemic equilibrium. Permanence is also discussed. It is shown that the disease is endemic in the sense of permanence if and only if the endemic equilibrium exists. This implies that transport-related infection on disease can make the disease endemic even if all the isolated regions are disease free.  相似文献
3.
首先,在不具有任何凸性结构的拓扑空间中引入Fan-Browder映射的概念.然后,证明了一个新的关于Fan-Browder映射的连续选择定理,其中定义域是非紧的。值域是不具有任何凸性结构的拓扑空间的子集.作为应用,给出了一些不动点定理、叠合点定理和一个非空交定理.这些新的概念和定理统一和推广了许多已有的结果.  相似文献
4.
It is proved that finite groups with 10p elements of the largest order, wherep ≥ 23 a prime, are solvable in this article. Consequently it follows that all finite group with 10p elements of largest order are solvable by some other results.  相似文献
5.
In this paper we prove that ifG is a finite group,2 D n (3)(9≤n=2 m +1 not a prime),G andM have the same order components, thenG ≈= M.  相似文献
6.
本文研究随机约束下线性回归模型中, 回归系数的加权混合估计与最小二乘估计的相对效率, 并且给出了相对效率的上下界限. 最后我们给出了一个例子来验证我们的理论结果.  相似文献
7.
胡贝贝  张玲 《数学杂志》2016,36(3):584-590
本文研究了超经典Boussinesq系统.利用已有的超经典Boussinesq方程族及其超哈密顿结构,构造了带自相容源的超经典Boussinesq方程族,并通过引入变量FG,获得了超经典Boussinesq方程族的守恒律.  相似文献
8.
周俊东  徐传友  宋卫东 《数学杂志》2015,35(5):1139-1147
本文研究了复射影空间中的全实子流形.通过使用活动标架的方法和DDVV不等式,得到了两个刚性定理和一个积分不等式,改进了相关的结果.  相似文献
9.
In this paper, we apply Littlewood–Paley theory and Itô integral to get the global existence of stochastic Navier–Stokes equations with Coriolis force in Fourier–Besov spaces. As a comparison, we also give corresponding results of the deterministic Navier–Stokes equations with Coriolis force.  相似文献
10.
In this paper, we present some Farkas-type results for a fractional programming problem. To this end, by using the properties of dualizing parametrization functions, Lagrangian functions and the epigraph of the conjugate functions, we introduce some new notions of regularity conditions and then obtain some dual forms of Farkas-type results for this fractional programming problem. We also obtain sufficient conditions for alternative type theorems. As an application of these results, we obtain the corresponding results for a convex optimization problem.  相似文献
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