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排序方式: 共有716条查询结果,搜索用时 15 毫秒
521.
This paper presents a non‐parametric method for estimating the conditional density associated to the jump rate of a piecewise‐deterministic Markov process. In our framework, the estimation needs only one observation of the process within a long time interval. Our method relies on a generalization of Aalen's multiplicative intensity model. We prove the uniform consistency of our estimator, under some reasonable assumptions related to the primitive characteristics of the process. A simulation study illustrates the behaviour of our estimator.  相似文献   
522.
把交换、商品、货币和市场作为哲学范畴来思考,即把它们从通常所属的经济学问题系列中离析出来,从而使我们有可能将这四个概念统一在市场经济活动的整体中,它们各自的本性及相互规定,相互运动构成了市场经济活动的本质特性.在哲学层面上阐明这些范畴的内在规定性以及对人作为社会存在的本体论意义,意在为澄清市场经济的一些基本概念提供一个新的视角.  相似文献   
523.
随着废弃电子产品的大量涌现和社会环保意识的增强,废弃电子产品的回收处理成为社会关注的热点问题之一。在现有的文献研究中,更多的是从逆向供应链系统化的视角关注价格或税收政策对回收商或处理商的运营效率、积极性的影响,逆向供应链激励的关键问题即如何确定回收价格和补贴方面的研究却较少见。本文基于社会福利最大化的视角,建立斯塔克伯格博弈模型(社会福利模型)来确定逆向供应链分散管理中的回收价格和社会最优补贴费,该模型可以检验分散管理系统(环保局作为领导者、MIS和回收商作为追随者)中回收逆向供应链的回收价格和补贴的激励效应。通过社会福利模型和资金平衡模型的比较,以及比较案例的数值演算,结果发现:达到市场最优销售数量和向顾客提供回收废弃电子产品的最优奖金的状况下,销售商和回收商处于平衡状态;社会福利模型中窒息价格、零奖金对应的基准收集数量、相对于奖金的收集量敏感度等因素对社会福利的影响均优于资金平衡模型。  相似文献   
524.
This article re-reads Marx's account of the commodity as a socio-natural entity. In doing so, it re-evaluates the status of the political (as opposed to questions of political economy) in Marx's analysis and also reads his argument in light of Actor-Network-Theory's call for the thingness of things to be taken seriously. The paper argues that there is a complex duality to the commodity as it is always comprised of both use-value and exchange-value and hence as both 'natural' and 'social'. It is pointed out that the usual translation of words with the root 'gesellschaft-' as 'social' is unhelpful and that a better term would be 'societal', as this enables Marx, and us, to re-approach the very distinction between the natural, the societal and the social. Marx's notion of 'value as equivalence' is then outlined and it is argued that this crucial stage in his account is often passed over. Value as equivalence is not a mere social production but relies upon the expression of the use-value of one thing in another. This leads to the third move which is an outline of the importance of value-form and social form. It is argued that it is this formation of a commodity (comprising both the natural and the social) which is the key both to understanding it as a specific historical entity as well as offering a powerful, non-reductive, account of the natural, social, material and historical character of things. Overall, the article attempts to develop a novel conception of natural-social commodities which does not premise either side of this dyad and so might help social theorists to talk of real things whilst avoiding charges of essentialism and reductionism as well as possible Latourian critiques of over-generalization.  相似文献   
525.
西欧人文主义文化与明朝市民文化   总被引:2,自引:0,他引:2  
本文主要探讨西欧人文主义文化与明朝市民文化的性质、特点及其社会和思想根源。文章运用比较研究方法,分别考察两种文化之间的异同,追溯了这些"同"与"异"产生的原因和两种文化发展的不同途径,以期为当前社会主义新文化的建设提供借鉴。  相似文献   
526.
如果将唐五代时期花间曲词看作文人之间、文人与民间情感能量互动行为中的"符号资本",那么花间词则可以看作是当时特定社会时期的流行文化符号。文章运用社会学互动仪式链理论,探究文人在"笙箫歌舞"的江南这一特定历史时期的社会微观情景中,在填词的社会互动的仪式链的交换情感乐趣中,我国第一部文人词集选《花间词》这一"符号资本"流行的传播本质规律。  相似文献   
527.
This article uses ILO global supply chain job estimates to study the impact on domestic jobs of foreign barriers to trade in goods and services. Empirical analysis largely confirms predictions derived from a theoretical model calibrated to WIOD data for 2000 and 2011. Barriers to trade in manufacturing and services are both found to have a cross‐border impact on jobs in their own sector and spill‐over effects in other sectors, the latter becoming stronger over time. This article shows the labour market consequences of the increased interconnectedness of countries and sectors through global supply chains, which suggests that trade policy can have significant external effects on foreign labour markets.  相似文献   
528.
529.
We prove Berry–Esséen bound for sample quantiles of Markov chains with spectral gap in L2.  相似文献   
530.
Hai-Bo Yu 《随机性模型》2017,33(4):551-571
ABSTRACT

Motivated by various applications in queueing theory, this article is devoted to the stochastic monotonicity and comparability of Markov chains with block-monotone transition matrices. First, we introduce the notion of block-increasing convex order for probability vectors, and characterize the block-monotone matrices in the sense of the block-increasing order and block-increasing convex order. Second, we characterize the Markov chain with general transition matrix by martingale and provide a stochastic comparison of two block-monotone Markov chains under the two block-monotone orders. Third, the stochastic comparison results for the Markov chains corresponding to the discrete-time GI/G/1 queue with different service distributions under the two block-monotone orders are given, and the lower bound and upper bound of the Markov chain corresponding to the discrete-time GI/G/1 queue in the sense of the block-increasing convex order are found.  相似文献   
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