Economic-statistical design of X ¥ charts for non-normal data by considering quality loss

When the X ¥ control chart is used to monitor a process, three parameters should be determined: the sample size, the sampling interval between successive samples, and the control limits of the chart. Duncan presented a cost model to determine the three parameters for an X ¥ chart. Alexander et al. combined Duncan's cost model with the Taguchi loss function to present a loss model for determining the three parameters. In this paper, the Burr distribution is employed to conduct the economic-statistical design of X ¥ charts for non-normal data. Alexander's loss model is used as the objective function, and the cumulative function of the Burr distribution is applied to derive the statistical constraints of the design. An example is presented to illustrate the solution procedure. From the results of the sensitivity analyses, we find that small values of the skewness coefficient have no significant effect on the optimal design; however, a larger value of skewness coefficient leads to a slightly larger sample size and sampling interval, as well as wider control limits. Meanwhile, an increase on the kurtosis coefficient results in an increase on the sample size and wider control limits.     

亚洲金融危机对中国外债管理的启示

亚洲金融危机发生国,均不同程度存在外债管理的漏洞和失误。作者将其与中国外债进行了对比分析,指出了中国外债管理的主要问题,提出了解决问题的思路。     

Additive Transformation Models for Recurrent Events

In this article, we propose a class of additive transformation models for recurrent event data, which includes the additive rates model as a special case. The new models offer great flexibility in formulating the effects of covariates on the mean function of recurrent events. Estimating equation approaches are developed for the model parameters, and asymptotic properties of the resulting estimators are established. In addition, a model checking procedure is presented to assess the adequacy of the model. The finite sample performance of the proposed estimators is examined through simulation studies, and an application to a bladder cancer study is presented.     

论宋国“子姓”之源

春秋时期的宋国之国姓相传为子姓,其得姓史书上溯到商之始祖契因佐禹治水有功而为舜赐姓子.在梳理宋国得姓之脉络的基础上,得出宋之子姓与契无关,而与殷商武丁王的一位杰出妃子妇好有关,妇好建立了子族的结论,宋国大概是妇好的后裔.     

马克思论现代性的流动性

现代性的特征之一是流动性.马克思认为现代性的流动性的根源是资本本身,同时,现代性的流动性也带来了种种后果.当今社会占主导地位的力量仍然是资本力量,因此,马克思关于现代性的流动性思想对于我们的时代仍有重要的意义.     

唐五代时期的词尾“头”

唐五代时期是词尾“头”发展的关键时期 ,有旧形式的沿用、扩展 ,有新形式的萌生 ,使用情况复杂。本文从形式和意义两方面对此期词尾“头”的使用情况进行了较全面的考察与综合的分析 ,并指出不同类型的词尾“头”出现的最早时期及基本的发展脉络     

传统民本思想向现代民主思想的转化

传统民本思想是中国传统政治思想的一个主题。它起源于先秦 ,形成于两汉 ,完备于隋唐 ,衰落于明清。传统民本思想既与现代民主思想有着本质区别 ,又是中国人在观念上走向现代民主思想的起点。树立人民群众创造历史的唯物主义观点 ,建立社会主义市场经济体制 ,社会主义民主的制度化、法律化 ,赋予民本思想时代新含义 ,分别是传统民本思想转化为现代民主思想的根本条件、必要条件、关键环节和重要途径     

“经济人”与制度正义初探

“经济人”是在对现实生活中的人进行科学抽象的基础上形成的。理性、自利、追求利益最大化是经济人的主要特性。经济人的行为受制度规范和约束。但是，经济人不正当的寻租行为会导致不正义制度的产生。这种缺乏正义的制度不仅难以规范经济人的行为，而且会给社会政治、经济、文化带来严重恶果。因此，树立制度正义，实行有效的制度正义实施机制，实现经济人与正义制度的良性契合意义重大。     

管理中的沟通障碍及其控制

有效的管理沟通是成功管理的关键因素之一.管理沟通的障碍主要源于个体因素、人际因素和组织因素;克服沟通障碍必须转变管理理念,对沟通过程进行有效的控制.