考虑不同耦合模式的耦合网络相继故障模型研究

发布时间：2018-06-27 04:06

本文选题：局部耦合网络 + 相互依赖耦合网络　；参考：《东北大学》2014年硕士论文

【摘要】：随着人类文明的进步和科学技术的发展,人们社会生活中的各个基础设施网络系统变得越来越完善,相互之间的耦合关联程度也越来越高,这给人们的生活带来了极大便利。但是由于各个基础设施网络之间耦合程度的增加,网络的复杂程度也在增加,慢慢的就会超过人们目前的掌控能力,发生相继故障的概率也越来越大。相关实验研究已经证明耦合网络相比单层次网络更加容易发生相继故障,并且相继故障对耦合网络造成的灾难后果也更加严重,有关耦合网络上相继故障的蔓延机制亟待研究。目前,有关耦合网络相继故障的研究已经成为学者们关注的热点,但是有关耦合网络耦合模式对相继故障影响的研究依然存在许多不足之处,需要做深入的研究,本文基于耦合网络上不同的耦合模式,进一步研究了不同拓扑结构的耦合网络上的相继故障。主要内容如下：(1)提出了局部耦合网络上的相继故障模型。大多数学者在研究耦合网络的时候都将目光聚焦在相互依赖的多网耦合模型上,而忽略了实际网络中存在局部耦合的现象,局部耦合网络相比相互依赖的耦合网络具有完全不同的相继故障蔓延机制。本文构建了局部耦合网络模型,从网络动态属性的一个新的研究视角,研究负荷的动态变化对局部耦合网络上相继故障现象的影响。(2)提出了局部耦合网络有效的保护策略。局部耦合网络之间的“桥边”与相互依赖网络完全不同,它在两个网络之间的负荷流动过程扮演这一个重要的角色,通过实验研究发现,增加局部耦合网络之间“桥边”处理额外负荷的能力可以很大程度的提高整个网络抵制相继故障的鲁棒性。所以本文提出了基于“桥边”的资源重新分配策略和免疫策略的两种网络保护方法,并且通过数值模拟验证了保护策略的有效性。(3)研究了不同耦合模式对相互依赖耦合网络抵抗相继故障能力的差异性影响。考虑到负荷的分配、能力的限制等复杂网络的动态属性,建立了带有可调参数的两层次全局依赖耦合网络上的相继故障模型。在文中研究了两种网络结构和三种连接模式构成不同耦合网络抵制相继故障蔓延的情况,研究发现,耦合网络的耦合模式和模型参数的取值都会影响网络抵制相继故障的能力,对结果进行对比后寻找合适的相互依赖网络间更好的耦合模式,有效地预防和控制相继故障雪崩式的蔓延。本文通过研究不同耦合模式对耦合网络抵抗相继故障能力的影响,提出了有效的控制和预防耦合网络上相继故障发生和蔓延的策略,并且尝试寻找最优的具有较强的抵抗相继故障能力网络耦合模式,使人们在对已有的网络进行维护和建设新的耦合网络的时候能够有科学有效的依据和指导参考。
[Abstract]:With the progress of human civilization and the development of science and technology, the network system of various infrastructure in people's social life becomes more and more perfect, and the degree of coupling between them becomes higher and higher, which brings great convenience to people's life. However, due to the increase of coupling degree between the various infrastructure networks, the complexity of the network is also increasing, which will slowly exceed the current control ability of people, and the probability of successive failures is also increasing. Related experiments have proved that coupled networks are more prone to successive failures than single-level networks, and the disaster consequences caused by successive failures are more serious. The spread mechanism of successive failures on coupled networks needs to be studied urgently. At present, the research on coupled network successive faults has become a hot topic for scholars. However, there are still many deficiencies in the study of the coupling mode of coupling network to the successive faults, which need to be further studied. In this paper, the successive faults in coupled networks with different topologies are studied based on different coupling modes. The main contents are as follows: (1) A sequential fault model on a local coupled network is proposed. When studying the coupling network, most scholars focus on the interdependent multi-network coupling model, but ignore the phenomenon of local coupling in the actual network. Compared with the interdependent coupled networks, the local coupling networks have completely different successive fault propagation mechanisms. In this paper, a local coupled network model is constructed. From a new perspective of dynamic properties of the network, the influence of dynamic load variation on successive failures in the local coupled network is studied. (2) an effective protection strategy for the local coupled network is proposed. The "bridge edge" between the local coupling networks is completely different from the interdependent network. It plays an important role in the load flow process between the two networks. The robustness of the whole network against successive failures can be greatly improved by increasing the ability of "bridge edge" between the local coupling networks to deal with the extra load. Therefore, this paper proposes two network protection methods based on "bridge side" resource redistribution strategy and immune strategy. The effectiveness of the protection strategy is verified by numerical simulation. (3) the different effects of different coupling modes on the ability of the interdependent coupled networks to resist successive failures are studied. Considering the dynamic properties of complex networks such as load distribution and capacity constraints, a sequential fault model on a two-level global dependent coupling network with adjustable parameters is established. In this paper, two kinds of network structure and three kinds of connection modes are studied. It is found that the coupling mode and model parameters of coupling network will affect the ability of network to resist successive faults. In order to prevent and control the avalanche spread of successive faults effectively, a better coupling mode between interdependent networks is found after the comparison of the results. By studying the influence of different coupling modes on the ability of coupling networks to resist successive faults, an effective strategy to control and prevent the occurrence and spread of successive faults in coupled networks is proposed. And we try to find the best coupling mode of network with strong ability to resist successive faults, so that people can have scientific and effective basis and guidance reference when maintaining existing networks and building new coupling networks.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：O157.5;TP393.06

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