A mixed double sampling plan based on Cpk

Abstract

Acceptance sampling plans are quality tools for the manufacturer and the customer. The ultimate result of reduction of nonconforming items will increase the profit of the manufacturer and enhance the satisfaction of the consumer. In this article, a mixed double sampling plan is proposed in which the attribute double sampling inspection is used in the first stage and a variables sampling plan based on the process capability index C_pk is used in the second stage. The optimal parameters are determined so that the producer’s and the consumer’s risks are to be satisfied with minimum average sample number. The optimal parameters of the proposed plan are estimated using different plan settings using two points on the operating characteristic curve approach. In designing the proposed mixed double sampling plan, we consider the symmetric and asymmetric nonconforming cases under variables inspection. The efficiency of the proposed plan is discussed and compared with the existing sampling plans. Tables are constructed for easy selection of the optimal plan parameters and an industrial example is also included for implementation of the proposed plan.     

Polanyi's Double Movement and Neoliberalization in Korea and Japan

This paper reformulates and extends Polanyi's main insights in The Great Transformations (2001 [1944]) and attempts to theorize the societal countermovement against neoliberalism by illustrating the cases of Korea and Japan. Polanyi's main approach was to synthesize three critical domains: the state, market, and society, and his notion of double movement should be understood as such. Predicated on his double movement, I analytically decompose the mechanism of societal countermovement, emphasizing the importance of social organizations that aggregate people's insecurities and translate them into a political voice capable of acquiring social protection. Applying this analytical framework of the double movement to Korea and Japan reveals that the problem with the conventional understanding of the double movement is that it necessarily arrives at social compensation equilibrium. This paper implies that a highly contentious society, like Korea's, and a highly docile society, like Japan's, may both hinder social welfare provision.     

Price Inference in Small Markets

This paper investigates the effects of market size on the ability of price to aggregate traders' private information. To account for heterogeneity in correlation of trader values, a Gaussian model of double auction is introduced that departs from the standard information structure based on a common (fundamental) shock. The paper shows that markets are informationally efficient only if correlations of values coincide across all bidder pairs. As a result, with heterogeneously interdependent values, price informativeness may not increase monotonically with market size. As a necessary and sufficient condition for the monotonicity, price informativeness increases with the number of traders if the implied reduction in (the absolute value of) an average correlation statistic of an information structure is sufficiently small.     

The table look-up rule

The table look-up rule problem can be described by the question: what is a good way for the table to represent the decision regions in the N-dimensional measurement space. This paper describes a quickly implementable table look-up rule based on Ashby’s representation of sets in his constraint analysis. A decision region for category c in the N-dimensional measurement space is considered to be the intersection of the inverse projections of the decision regions determined for category c by Bayes rules in smaller dimensional projection spaces. Error bounds for this composite decision rule are derived: any entry in the confusion matrix for the composite decision rule is bounded above by the minimum of that entry taken over all the confusion matrices of the Bayes decision rules in the smaller dimensional projection spaces.

On simulated Gaussian Data, probability of error with the table look-up rule is comparable to the optimum Bayes rule.     

基于报童模型的两级供应链回购契约协调研究

研究具有单一供应商和单一销售商的供应链系统回购契约协调机制。分析了报童模型下两级供应链双边际化效应,建立了基于报童模型的分散式系统、集中式系统的供应商、销售商利润模型,讨论了如何通过回购契约来消除"双边际化效应"。结果表明:回购契约的采用使批发价格比不采用契约时的批发价格低,且使订货量增加,从而使供应链的总利润增加,并且减少了缺货带来的损失,同时更好的满足了顾客需要。最终实现了独立个体最优决策与系统最优决策一致化的供应链协调。     

一种新的基于双前沿面的交叉效率方法及其应用

本文将双前沿面效率评价的思想引入到传统交叉效率模型中,同时,针对双前沿面交叉效率方法中仁慈型和激进型交叉效率策略无法抉择,以及这两种交叉效率策略的应用范围有限的不足,提出了一种新的基于双前沿面的交叉效率方法。该方法的基本思想是选取一个理想决策单元和负理想决策单元,使用被评价决策单元的权重来计算理想决策单元和负理想决策单元的效率,并使被评价决策单元的效率尽可能接近理想解的效率,同时,尽可能远离负理想解的效率。根据该思想,分别在乐观前沿面和悲观前沿面下求解交叉效率值并进行集结,避免了由于前沿面的选择不同导致的差异以及决策者对仁慈型和激进型交叉效率策略进行抉择的困难。最后,将本文方法与现有方法进行对比分析,并将本文方法应用于我国东部地区10个省(直辖市)的创新效率评价中,以验证方法的有效性。     

Dynamic Blowout Risk Analysis Using Loss Functions

Most risk analysis approaches are static; failing to capture evolving conditions. Blowout, the most feared accident during a drilling operation, is a complex and dynamic event. The traditional risk analysis methods are useful in the early design stage of drilling operation while falling short during evolving operational decision making. A new dynamic risk analysis approach is presented to capture evolving situations through dynamic probability and consequence models. The dynamic consequence models, the focus of this study, are developed in terms of loss functions. These models are subsequently integrated with the probability to estimate operational risk, providing a real‐time risk analysis. The real‐time evolving situation is considered dependent on the changing bottom‐hole pressure as drilling progresses. The application of the methodology and models are demonstrated with a case study of an offshore drilling operation evolving to a blowout.     

从《紫色》看非裔美国人的两难境地

解读了美国当代黑人女作家艾丽丝.沃克的作品《紫色》,深刻分析处于美国边缘地位的非裔美国人如何正确认识自身的社会地位,即在白色崇美主义的洪流中和面对与自己拥有相同肤色种族的同胞时,具有双重意识的他们所处的两难境地。     

金融市场的流动性过剩与流动性风险分析

金融市场在结构、主体、产品、判断和投资组合等方面过度集中并日益趋于同质化,削弱了市场上的多样性,从而提供了金融流动性风险产生的土壤和机会。通过度量股票交易量与股票收益之间相关性的chi图实证表明,流动性风险正在微观层面上慢慢积累。当国内流动性过剩矛盾日益突出时,人们需要居安思危,高度关注流动性黑洞可能出现的风险。     

国家非遗项目“耿村故事”的英译

采用波长分别为532 nm和1 064 nm的Nd YAG脉冲激光器作为光源,以中阶梯光栅光谱仪和增强型电荷耦合器件（ICCD）作为光谱采集和检测器件,分析了激光脉冲间隔和积分延时对土壤中Pb元素激光诱导击穿等离子体发射光谱的影响。实验结果表明：双脉冲激光激发的等离子体谱线强度较单脉冲有整体的提升,在0～-20 μs的脉冲间隔区间内谱线强度存在一个峰值,当脉冲间隔为-15 μs时,Pb元素等离子体谱线增强效果最好;不同脉冲间隔的等离子体发射谱线强度都随积分延时的增加呈衰减趋势,脉冲间隔越大,衰减速率越快,