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Constructing a strict total order for alternatives characterized by multiple criteria: An extension
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Akram Dehnokhalaji Pekka J. Korhonen Murat Köksalan Nasim Nasrabadi Diclehan Tezcaner Öztürk Jyrki Wallenius 《海军后勤学研究》2014,61(2):155-163
The problem of finding a strict total order for a finite set of multiple criteria alternatives is considered. Our research extends previous work by us, which considered finding a partial order for a finite set of alternatives. We merge the preference information extracted from the preference cones and corresponding polyhedral sets, with the information derived from pairwise comparisons of two alternatives, yielding a preference matrix. This preference matrix is used as input to an integer programming model to obtain a strict total order that provides a transitive ranking for the set of alternatives. © 2014 Wiley Periodicals, Inc. Naval Research Logistics 61: 155–163, 2014 相似文献
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Obert Hodzi 《African Security Review》2014,23(3):295-306
This paper argues that the crisis of electoral democracy in Zimbabwe and Cote d'Ivoire is a result of underlying structural and institutional deficiencies within national and regional multinational institutions. It assesses the extent to which they have been ‘enablers’ or ‘spoilers’ of electoral-based transitions to democracy. Yet it avoids generalisations of the security sector's involvement in political transitions. In terms of structure, the paper is divided into four sections. Section one will briefly discuss the theoretical perspectives of the election-democracy trajectory. It argues that although elections are a major variable for democracy, unless the ‘ecology of elections’ is conducive, elections may not be an instrument of transition to democracy. The second section analyses the militarisation of politics and the role of the security sector in aiding or stalling democratisation. Section three will assess the role of regional organisations such as the Southern African Development Community, Economic Community of West African States and the African Union in electoral-based political transitions in Africa. Lastly, the paper will discuss how the security sector and multinational African institutions can aid political transitions to democracy in troubled African countries. 相似文献
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Rosa E. Lillo 《海军后勤学研究》2005,52(4):370-380
This paper is devoted to study several aspects of the median residual life function (MERLF). In reliability studies, it is well known that, although the MERLF have several advantages over the mean residual life function (MRLF), the MRLF has the good property of uniquely determine a life distribution whereas either the median residual life function (MERLF) or an α‐percentile residual life do not have such good property. We shall give a characterization result where knowledge of both the MERLF and the survival function on an interval does uniquely determine the distribution. Moreover, in order to apply this characterization in practical situations, we propose a method to estimate the necessary information of the survival function. Relationships between analytical properties of the survival function and its associated MERLF are also obtained. Bryson and Siddiqui [J Am Statist Assoc 64 (1969), 1472–1483] proved relationships among seven criteria for aging, out of which two contained the MRLF (decreasing MRLF and net decreasing MRLF). In this paper, we prove that the same pattern of relationships holds if the MRLF is replaced by the MERLF. We also examine the aging criteria corresponding to an increasing MERLF and show that there is no relation between the behavior (increasing or decreasing) of the MERLF and of the MRLF. © 2005 Wiley Periodicals, Inc. Naval Research Logistics, 2005 相似文献
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The article is devoted to problems of defining quantitative criteria for the physical protection system (PPS) effectiveness of nuclear facilities. The article briefly describes the scheme of the PPS development used in the nuclear industry in Russia, gives a review of existing approaches to defining the minimal acceptable value of the system's effectiveness, and reveals advantages and disadvantages of the approaches. The article describes in detail an approach based on facility categorization by potential losses and a technique of defining the minimal acceptable value of the PPS effectiveness developed on its base. 相似文献
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应用Williams本征函数展开和线性变换求解V型切口端部渐进位移场。将该位移场加入常规等参单元位移模式中,构造双材料V型切口加料单元和过渡单元的位移模式,推导加料有限元方程。建立带V型缺口双材料三点弯曲梁试件和直角界面端平面问题的加料有限元模型,求解有限元方程可直接得到应力强度因子。计算结果与用其他方法得到的数据吻合,验证了方法的正确性,可用于双材料V型切口结构断裂特性计算分析。 相似文献
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通过碳纳米管的不同表面官能化,构造其与环氧树脂的不同界面。采用动态机械性能分析研究不同表面官能化碳纳米管对环氧树脂复合材料玻璃化转变温度的影响;采用摆锤冲击试验研究环氧树脂复合材料的韧性。结果表明:与纯环氧树脂相比,氨基化碳纳米管/环氧树脂复合材料的玻璃化转变温度升高,而羧基化碳纳米管/环氧树脂复合材料的玻璃化转变温度反而有所下降;碳纳米管/环氧树脂复合材料的冲击强度相比纯环氧树脂均提高了近一倍。复合材料性能的这些变化规律主要归因于不同表面官能化碳纳米管与环氧树脂基体间形成了不同的界面。 相似文献