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81.
我国物流市场的区域差异分析 总被引:2,自引:0,他引:2
首先运用因子分析法对我国31个省(区、市)物流市场的差异作了分析,得出3个主要因子。然后以这3个主要因子为新变量,采用聚类分析法将31个省(区、市)分为5个层次,分别代表不同的物流需求程度。最后结合我国物流市场的实际情况加以定性分析。 相似文献
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应急物流是以提供突发性自然灾害、突发性公共卫生事件等突发性事件所需应急物资为目的,以追求时间效益最大化和灾害损失最小化为目标的特种物流活动。本文针对应急物流中的应急物资采购问题,在分析了应急物资供应商选择的影响因素的基础上,构建了基于交货准时性、质量、成本的多目标供应商选择模型,并给出了算例求解。 相似文献
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基于多元统计分析的封闭式基金业绩评价 总被引:2,自引:0,他引:2
本文引入在险价值(VaR)和基金折价率指标,利用因子分析和聚类分析方法对基金业绩进行综合评价。实证分析发现我国封闭式基金收益率优于市场收益率,少数几只基金业绩相对突出,实现低风险高收益的目标。但封闭式基金折价幅度较大,基金内部收益水平与外部评价状况背离,反映了市场投资者的投资非理性现象。 相似文献
86.
A new continuous distribution and two new families of distributions based on the exponential 总被引:1,自引:0,他引:1
Recent work on social status led to derivation of a new continuous distribution based on the exponential. The new variate, termed the ring(2)-exponential, in turn leads to derivation of two closely related new families of continuous distributions, the mirror-exponential and the ring-exponential. Both the standard exponential and the ring(2)-exponential are special cases of both the new families. In this paper, we first focus on the ring(2)-exponential, describing its derivation and examining its properties, and next introduce the two new families, describing their derivation and initiating exploration of their properties. The mirror-exponential arises naturally in the study of status; the ring-exponential arises from the mathematical structure of the ring(2)-exponential. Both have the potential for broad application in diverse contexts across science and engineering. Within sociobehavioral contexts, the new mirror-exponential may have application to the problem of approximating the form and inequality of the wage distribution. 相似文献
87.
We propose a new bivariate distribution following a GLM form i.e., natural exponential family given the constantly correlated covariance matrix. The proposed distribution can represent an independent bivariate gamma distribution as a special case. In order to derive the distribution we utilize an integrating factor method to satisfy the integrability condition of the quasi-score function. The derived distribution becomes a mixture of discrete and absolute continuous distributions. The proposal of our new bivariate distribution will make it possible to develop some bivariate generalized linear models. Further the discrete correlated bivariate distribution will also arise from an independent bivariate Poisson mass function by compounding our proposed distribution (Iwasaki and Tsubaki, 2002).Received March 2003 相似文献
88.
Sharna Wiblen Anthony McDonnell 《International Journal of Human Resource Management》2020,31(4):474-510
AbstractThrough an in-depth, multilevel case study of a professional services firm, this paper illuminates what stakeholders mean when they use the term ‘talent’. The paper underlines how various contextual factors including, workforce composition, ownership structures and individual perceptions influence talent meanings within an organisation. Our analysis of talent phenomena at a multiplicity of levels illustrates that it is not only about the words, phrases, and terms employed when talking about talent that requires examination. There is a need to deliberate on the meanings that underpin the talk because while stakeholders may talk the same way they may mean different things. The paper makes a key theoretical contribution through specific recognition of the importance of thoughtful reflection of how stakeholders discursively construct meanings because ‘talent’ is a concept, which requires translation via talk to become meaningful within the material world and these meanings are influenced by context. Thus, we cannot infer, that talent meanings radiate within organisations, nor across organisational boundaries, industries or countries because discourses arise and materialise within specific contexts and we must acknowledge that talent discourses can not be removed from the context in which they operate. 相似文献
89.
农民工的社会网络变迁 总被引:2,自引:2,他引:2
采用系统模式研究了进城农民工的社会网络重构过程,指出随着谋生方式由农业生产向非农产业的转移,进城农民工正在逐步建立起以业缘关系为基础的新的社会纽带,并使之成为其社会网络的重要组成部分.这些由进城农民工一手构建的社会关系网络正在成为他们在城市生活中赖以生存和发展的重要资本. 相似文献
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