其他

Oscillation of Two-Dimensional Neutral Delay Dynamic Systems featured image

Oscillation of Two-Dimensional Neutral Delay Dynamic Systems

We consider a class of nonlinear two-dimensional dynamic systems of the neutral type (x(t) - a(t)x(tau(1)(t)))(Delta) = p(t)f(1)(y(t)), y(Delta)(t) = -q(t)f(2)(x(tau(2)(t))). We …

Xinli Zhang
Nonlinear Hydroelastic Waves beneath a Floating Ice Sheet in a Fluid of Finite Depth featured image

Nonlinear Hydroelastic Waves beneath a Floating Ice Sheet in a Fluid of Finite Depth

The nonlinear hydroelastic waves propagating beneath an infinite ice sheet floating on an inviscid fluid of finite depth are investigated analytically. The approximate series …

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刘庆亮
An Efficient Video Watermark Method Using Blockchain featured image

An Efficient Video Watermark Method Using Blockchain

Nowadays, one of the most common approaches for video watermarking is to use singular value decomposition in the discrete wavelet transform domain. In our prior work, we formulated …

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刘庆亮
时间尺度上一类高阶中立型动力方程非振动解的存在性 featured image

时间尺度上一类高阶中立型动力方程非振动解的存在性

借助时间尺度上的有关理论和不动点定理,研究一类较为广泛的时间尺度上高阶带强迫项非线性中立型动力方程,建立该类方程非振动解存在的充要条件。所得结果推广和改进了已有的结论,并通过一个例子阐述主要结果。

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朱善良
Oscillation and Nonoscillation Criteria for Nonlinear Dynamic Systems on Time Scales featured image

Oscillation and Nonoscillation Criteria for Nonlinear Dynamic Systems on Time Scales

We consider the nonlinear dynamic system x(Delta)(t) = a(t)g(y(t)), y(Delta)(t) = -f(t, x(sigma)(t)). We establish some necessary and sufficient conditions for the existence of …

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朱善良
基于具有尾部变结构的Copula-GARCH模型的相关性分析 featured image

基于具有尾部变结构的Copula-GARCH模型的相关性分析

针对金融市场中不同资产之间的尾部相关结构的非对称性和动态性,并通过分析几种常见的Copula函数在相关性分析上的优劣,本工作创新之处是构建了具有尾部变结构的Copula-GARCH模型。相比于单一的、静态的Copula函数,它具有多个Copula函数的混合特性。最后以上证综指和深证成指为例进行分析,结果表明:该模型能够更准确地描述投资组合中金融时间序列之间的 …

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王苹
利用透明度进行时空信息可视化 featured image

利用透明度进行时空信息可视化

利用电子地图中透明度视觉变量产生的虚实感,在对当前焦点时刻时空内容进行完全表达的同时,以不同透明度图形对时间上下文中的内容进行辅助表达,实现兼顾焦点时刻和时间上下文的时空可视化。该方法能够从时间全局上描绘时空对象的时间分布和时态关系,帮助把握时空发展的趋势和规律,同时更加高效地利用地图幅面,时空信息量更加丰富。

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艾波
时间尺度上高阶带强迫项中立型动力方程正解的存在性 featured image

时间尺度上高阶带强迫项中立型动力方程正解的存在性

借助时间尺度上的有关理论和Banach压缩映射原理,研究一类较为广泛的时间尺度上高阶带强迫项中立型动力方程正解的存在性。建立该类方程正解存在的几个新的充分条件,并给出一个例子验证所得结果。

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朱善良
时滞不确定随机系统的鲁棒稳定性 featured image

时滞不确定随机系统的鲁棒稳定性

This paper studies mean square robust exponentially stability of uncertain stochastic systems, With the help of linear matrix inequality theory and Lyapunov function, and taking …

Cunchen Gao
一类非线性时变时滞随机大系统的稳定性 featured image

一类非线性时变时滞随机大系统的稳定性

Almost surely asymptotic stability of the trivial solution of linear stochastic system with ime-varying de-lays is discussed , and is extended to the nonlinear stochastic …

Cui Hongyan