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Abstract
Critical infrastructures (CI) are the cornerstone of modern society, and they are connected with each other through material, energy, or information. The robustness of interdependent CI systems under attack has been a hot topic in recent years, but previous studies mainly focused on malicious attacks or random failure. To analyze the impact of some natural disasters whose destructive force is mainly related to distance with respect to interdependent CI systems, we present a new localized attack mode considering destructive force decays with distance, and carry out simulations on several interdependent networks constructed by artificial and real world networks. Furthermore, this article analyzes the influence of coupling strength and coupling pattern on the robustness of interdependent system. The results show that dependency links between networks decrease the robustness of interdependence networks, but the robustness under failure probability degradation is not vulnerable like that under malicious attack or random failure. In addition, the coupling preference has little effect on the robustness of interdependent networks under the new localized attack strategy; when the average degree of subnetworks is large, the same conclusion can be obtained for the coupling strength.
Highlights
Nowadays, critical networked infrastructures, such as power grids, water supply networks, transportation networks, and the Internet, play an increasingly important role in modern society.These infrastructures are not isolated, but interact with each other through connections, such as material, energy, and information [1,2,3]
Considering the significant loss caused by infrastructure failure, it is of great practical significance to study the robustness of interdependent networks, and this issue has become a hot topic in recent years
This paper studies the robustness of interdependent networks under a new localized attack strategy, providing a reference for the design of a more robust critical infrastructure system
Summary
Critical networked infrastructures, such as power grids, water supply networks, transportation networks, and the Internet, play an increasingly important role in modern society. The topology of subnetworks, such as the degree of distribution [4,8], clustering coefficient [10,11,12], and assortative [13], is an important factor affecting the robustness of interdependent networks, and most recent works are carried out from this perspective These studies are often carried out in the context of different attack strategies and coupling preference [8,14,15,16,17,18]. The impact of earthquakes may be very large, but infrastructure nodes in the scope will not necessarily fail, and the failure probability of nodes should decrease with the distance from epicenter Based on this consideration, this paper studies the robustness of interdependent networks under a new localized attack strategy, providing a reference for the design of a more robust critical infrastructure system. The last part summarizes the whole text and looks forward to the future work
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