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Khalil I.T. Al-Dosary 《Journal of Mathematical Analysis and Applications》2006,323(2):790-797
In this paper we present nonintegral criteria for oscillation of linear Hamiltonian matrix system U′=A(x)U+B(x)V, V′=C(x)U−A*(x)V under the hypothesis (H): A(x), B(x)=B*(x)>0, and C(x)=C*(x) are 2×2 matrices of real valued continuous functions on the interval I=[a,∞),(−∞<a). These criteria are conditions of algebraic type only. Our results are also useful for the detection of the oscillation of particular matrix differential systems. 相似文献
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地下矿山运输系统建模与仿真 总被引:1,自引:0,他引:1
系统仿真是系统工程领域的研究热点之一.针对大型地下矿山的运输这一庞大而复杂的系统,以云南锡业集团松树脚矿1360水平运输系统为研究对象,应用离散事件仿真原理,建立了运输系统模型.通过对某些运输参数的调整,确定了其最优的车辆分配,分析了运输系统效率,对该运输系统的运输能力做出了科学的评估. 相似文献
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Yuhua Xu Wuneng Zhou Jian‐an Fang Junhai Ma Yuling Wang 《Mathematical Methods in the Applied Sciences》2011,34(17):2159-2166
A new chaotic system is found by feedback controlling method in this paper. According to the definition of the generalized Lorenz system, the new chaotic system does not belong to generalized Lorenz systems. We analyze the new system by means of phase portraits, Lyapunov exponents, fractional dimension, bifurcation diagram, and Poincaré map. The particular interest is that this novel system can generate two one‐scroll and one two‐scroll chaotic attractors with the variation of a single parameter. The obtained results show clearly that the system is a new chaotic system and deserves a further detailed investigation. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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Jianze LI 《Frontiers of Mathematics in China》2012,7(5):847-855
In this paper, we first give the definition of possibly non-unital function system, which is a characterization of the self-adjoint subspace of the space of continuous functions on a compact Hausdorff space with the induced order and norm structure. Similar to operator system case, we define the unitalization of a possibly non-unital function system. Then we construct two possibly non-unital operator system structures on a given possibly non-unital function system, which are the analogues of minimal and maximal operator spaces on a normed space. These two structures have many interesting relations with the minimal and maximal operator system structures on a given function system. 相似文献
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系统模拟做为一种定量分析的手段,在管理中发挥着重要的作用,对离散系统模拟方法进行了讨论,建立了一个随机服务系统的模型,并通过Excel对其进行模拟,最后对该系统的性能进行了分析. 相似文献
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Vaclav Linek 《组合设计杂志》2009,17(1):36-38
For , a S(t,K,v) design is a pair, , with |V| = v and a set of subsets of V such that each t‐subset of V is contained in a unique and for all . If , , , and is a S(t,K,u) design, then we say has a subdesign on U. We show that a S(3,{4,6},18) design with a subdesign S(3,4,8) does not exist. © 2007 Wiley Periodicals, Inc. J Combin Designs 17: 36–38, 2009 相似文献
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本文讨论随机动态线性经济系统:Yt=AY_(t-1)+b十μ_t在矩阵A为一般情形下的稳定性问题。并给出该系统稳定的充要条件。 相似文献
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本文研究了一类非线性系统解的正向有界性.运用常微分方程定性理论的方法,获得了这类方程所有解有界的充分条件和必要条件.推广和改进了已有文献中的结果. 相似文献
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彭江艳 《数学的实践与认识》2005,35(9):105-108
由于条件失效率有很好的直观意义且易获得,用它们去刻画相关部件组成的串或并联的系统失效率是一条有效的新途径.但并联系统失效率的表示过于复杂.由此,新定义过程失效率向量,但仍基于条件失效率,从另一方面描述并联系统的整个失效状况,并用Basu定义二维失效率说明其应用.最后,将以上两种刻画方式统一为系统过程失效率函数. 相似文献
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Takashi Amemiya 《Applied mathematics and computation》2001,120(1-3):45-54
The uncertain linear systems with time-varying delays and limited measurable states variables are shown to have special configuration, called triangular configuration, to be stabilizable by means of state variable feedback controller. This configuration indicates the location of uncertainties among system parameters including input and output coefficients. 相似文献
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Hong Oh Kim Rae Young Kim Jae Kun Lim Zuowei Shen 《Journal of Approximation Theory》2007,147(2):196-204
We start with a characterization of a pair of frames to be orthogonal in a shift-invariant space and then give a simple construction of a pair of orthogonal shift-invariant frames. This is applied to obtain a construction of a pair of Gabor orthogonal frames as an example. This is also developed further to obtain constructions of a pair of orthogonal wavelet frames. 相似文献
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把Peuteman-Aeyels指数稳定性定理从确定性系统推广到随机系统.并借此讨论了随机混杂系统的均方指数镇定问题,得出了系统在同步切换下可镇定的充分必要条件. 相似文献
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In this paper, we investigate the stability properties of a general class of nonautonomous switched nonlinear systems. Sufficient conditions for uniform stability, uniform asymptotic stability and uniform exponential stability are derived via multiple Lyapunov functions. Our results provide stability criteria for switched systems with both stable and unstable subsystems. Particularly, our results include some existing results as special cases or improve those in the literature. Several numerical examples are worked out to illustrate our results. 相似文献
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D. Zangurashvili 《Georgian Mathematical Journal》1999,6(2):191-200
Several results on the translation of factorization systems along adjunctions are proved. The first of these results is the answer to the question posed by G.Janelidze. 相似文献