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互联网AS级拓扑中心化度量方法 被引量:2
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作者 赵海 贾思媛 +1 位作者 艾均 崔行兵 《东北大学学报(自然科学版)》 EI CAS CSCD 北大核心 2012年第9期1248-1252,共5页
针对如何能够在规模庞大、结构复杂的互联网AS级中准确而迅速地发现中心节点这一问题,展开对互联网AS级拓扑中心化度量方法的研究.应用三种现在普遍应用的中心化指标——度中心化、紧密度中心化、介数中心化,同时提出一种核中心化的度... 针对如何能够在规模庞大、结构复杂的互联网AS级中准确而迅速地发现中心节点这一问题,展开对互联网AS级拓扑中心化度量方法的研究.应用三种现在普遍应用的中心化指标——度中心化、紧密度中心化、介数中心化,同时提出一种核中心化的度量法来度量网络中的高核数节点集合.采用节点删除法,通过删除某个节点对网络连通的破坏程度来度量网络中该节点的重要性.经研究发现紧密度中心化在互联网AS级度量上弱于度中心化和介数中心化指标;度中心化和介数中心化在攻击节点数小于0.5%时,有很强的相似性;核中心化度量方法非常适用于查找到网络中度值较高且连接紧密节点所构成的社团. 展开更多
关键词 复杂网络 互联网AS级 中心化 节点删除 中心化攻击
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Hate Crimes Methodological, Theoretical & Empirical Difficulties A Pragmatic & Legal Overview
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作者 Gadi Hitman Dror Harel 《Cultural and Religious Studies》 2016年第1期1-13,共13页
Hate crimes are a culture phenomenon which is perceived by most as an occurrence that should be uprooted from the society. Yet, to date, we have been unable to do so. Hate crimes are the subject of research and commen... Hate crimes are a culture phenomenon which is perceived by most as an occurrence that should be uprooted from the society. Yet, to date, we have been unable to do so. Hate crimes are the subject of research and comments by experts in various fields. In this regard, most scholars agree that a hate based crime is distinguished from a "regular" criminal offence by the motive--the attack is aimed at a victim who is part of a differentiated minority group. However, when reading the relevant documents in the area, it seems that the differences between the experts start at the most basic point--what constitutes hate crimes? This article analyses the concept of "hate crimes" via an interdisciplinary approach aimed at flashing out the fundamental gaps in the research. We have found that the problems include, inter alia, discrepancies in the definition of hate crimes, methodological difficulties regarding validity and legitimacy (mainly due to the absence of information based on the attacker's point of view) and the lack of agreement on the appropriate legal methods required to deal with the ramifications of hate crimes. While part I of this paper revolves around the theoretical aspects of the questions put forth at the centre of this article, part II looks at the same questions from a legal viewpoint. The correlation between the two chapters shows the impact the methodological difficulties have on enforcement endeavors. This relation is further advanced through the examination of test cases from different countries, among them--lsrael. Finally, the article concludes by suggesting a few thoughts on the way to overcome the theoretical problems and making the enforcement efforts more efficient. 展开更多
关键词 hate crimes methodological problems legal enforcement
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