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Measures of network vulnerability indicators for risk evaluation and exposure reduction

机译：用于评估和减少风险的网络漏洞指标的度量

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摘要

Reliability of transportation systems can be affected by events both exogenous to the system (i.e. earthquakes, floods, terrorism attack, etc.) and endogenous to the system (i.e. dangerous freight, etc.). Hazardous events can introduce disconnections in transportation systems whose effects can be relevant both in the short term (difficulties in evacuation procedures and aids to population) and in the long term (effects in local services and local economies). For these main reasons, in particular considering nonurban situations, to guarantee an acceptable level of accessibility among urban centers an analysis of network vulnerability is relevant. In this paper, after an introduction concerning the concept of network vulnerability, it is proposed an enhanced method, based on consolidated procedures generally adopted in the analysis of transport networks, to explore a transport network in order to put in evidence weakness in some of the links by computing quantitative indicators. The proposed methodology can be adopted, once defined a risk scenario, both to select where to plan necessary adjustments on transport system and to define adequate operations for evacuation and to come to the aid of population, in order to reduce exposure. An explicative application to a real system is also shown to put in evidence capabilities of the proposed indicators.
机译：运输系统的可靠性可能会受到系统外部事件（例如地震，洪水，恐怖主义袭击等）和系统内部事件（例如危险货物等）的影响。危险事件可能会导致运输系统断开连接，其影响在短期（疏散程序和对人口援助的困难）和长期（对当地服务业和当地经济的影响）方面都具有重要意义。由于这些主要原因，尤其是考虑到非城市情况时，为了确保城市中心之间的可接受的可访问性水平，对网络脆弱性进行分析是必要的。本文在介绍了网络脆弱性的概念之后，基于传输网络分析中通常采用的合并程序，提出了一种改进的方法来探索传输网络，以证明某些网络中存在的弱点。通过计算量化指标进行链接。一旦定义了风险情景，既可以选择拟议的方法，也可以选择在何处计划对运输系统进行必要的调整，并定义适当的疏散操作和援助人群，以减少接触。还显示了对实际系统的解释性应用可以证明拟议指标的能力。

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