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.     

作为文化感应变化的间断熵——埃克森·瓦尔迪兹石油泄漏事故研究

间断熵在文化领域被定义为一种永久的衰退,是人类文化系统对环境适应灵活性的永久萎缩,它预测并解释了灾后人类系统不能重建的原因。1989年发生于埃克森·瓦尔迪兹的石油泄漏事故是一次技术性灾难,对威廉王子湾地区的商业性捕鱼和建立在生存资料基础上的社区生活模式造成了严重的影响,并在其随后的灾后重建中表现出明显的间断熵过程。究其原因在于：（1）自然资源基础受到严重损坏,影响了原有的生计方式;（2）外来援助的方向性错误或有所保留,致使当地居民的精神创伤加剧;（3）灾后地区政治生态妨碍人类与环境互动传统模式的恢复。威廉王子湾地区作为自然资源社区,代表了一种文化上适合可持续发展的能力,那么他们应该被竭力保护,而不是被排斥或消除。对此,人类学家应该致力于研究如何对抗间断熵,为预防、应对和缓解灾难创造出文化上适宜的新方法。     

武陵山片区务工者家庭教育需求——基于湖南湘西州古丈县的调研数据

教育与经济的悖论源于贫困地区人才逆向流动的现实,然而从国家第一个连片开发的武陵山片区外出务工者的调研表明,务工是短期、直接、表面收益,教育是长期、间接、根本收益;优先发展教育甚至是教育第一发展是贫困地区根本改变落后状态的必然选择,现在是,将来也是。教育与经济相互促进,导致理论上出现教育与经济的悖论可能的原因是过分注重短期效益、直接效益、表面效益。     

藏传佛教文化的当代性及其弘扬机制与模式

藏传佛教文化在当代藏区社会具有一定的地位和自身的社会角色,其中精华和糟粕并存,对其精华的弘扬和对其糟粕的革除有着内在必然性和重要的时代价值。但是,藏传佛教文化的弘扬有一些严重制约性的因素,客观上需要加以解决。在弘扬藏传佛教文化的历史进程中,需要建立或建构能充分发挥其文化功能和当代价值的机制和模式,并且这种机制应该具有针对性、长效性和多角度,模式也应真正具有方法论的指导意义。     

具有GARCH（1，1）-正态误差项的非对称单位根检验研究

摘　　要:理论研究表明许多经济变量呈现出非对称的门限自回归（TAR）或动态门限自回归（M-TAR）数据生成机制,因而非对称单位根检验就成为该领域的主要研究方向之一。本文对非对称单位根检验Enders-Granger方法在GARCH（1,1）-正态误差项下的检验水平与检验势作了系统的仿真研究。研究表明：GARCH（1,1）-正态误差项的TAR或M-TAR模型会对该方法的检验水平和检验势产生重要影响。     

Statistical Inference Based on Pooled Data: A Moment-Based Estimating Equation Approach

We consider statistical inference on parameters of a distribution when only pooled data are observed. A moment-based estimating equation approach is proposed to deal with situations where likelihood functions based on pooled data are difficult to work with. We outline the method to obtain estimates and test statistics of the parameters of interest in the general setting. We demonstrate the approach on the family of distributions generated by the Box-Cox transformation model, and, in the process, construct tests for goodness of fit based on the pooled data.     

Easy-to-construct confidence bands for comparing two simple linear regression lines

This paper shows how to construct confidence bands for the difference between two simple linear regression lines. These confidence bands provide directly the information on the magnitude of the difference between the regression lines over an interval of interest and, as a by-product, can be used as a formal test of the difference between the two regression lines. Various different shapes of confidence bands are illustrated, and particular attention is paid towards confidence bands whose construction only involves critical points from standard distributions so that they are consequently easy to construct.     

我国商业银行无形资产统计问题研究

摘　　要:商业银行无形资产是形成商业银行核心竞争力的基础和产生超额收益的源泉,加强商业银行无形资产统计工作,有利于充分揭示商业银行无形资产基本内容和对核心竞争力的影响。笔者认为,目前我国商业银行无形资产统计指标体系设置不完整,统计制度不健全,统计内容不全面,统计分析不深入,影响经济决策。笔者认为,完善商业银行无形资产统计制度时,应从组织结构类、客户关系类、知识创新类和人力资本类等四个方面对无形资产进行统计,逐步细化统计指标,明确具体的统计内容,建立、健全无形资产价值信息系统,深化无形资产统计分析工作,以此为基础,提出提高商业银行核心竞争力的基本策略。     

水蒸气钝化裂化催化剂工艺条件的探讨

对共Y-15裂化催化剂在模拟工业条件下进行了不同温度、压力和时间的水蒸气处理,考察了其钝化效果,将高温水蒸气的钝化效果与锑钝化剂的钝化效果进行了比较.结果表明,前者的钝化效果优于后者;经高温水蒸气钝化后的裂化催化剂能在微活性不显著降低的前提下,使氢气产率、焦炭产率显著降低.     

PES-C,(PP/Bis-T)PES的次级松驰与转变

描述了酚酞型聚芳醚砜(PES-C)的次级松驰和转变与其结构的关系.TBA和动态力学实验结果表明:PES-C及其共聚物(PP/Bis-T)PES分别在0～50℃和-100℃附近呈现出两个次级松驰峰;双酚T单元的引入导致了PES-C在0～50℃之间的次级松驰位置改变.证实了Cardo侧基的存在对-100℃的次级松驰有较大的贡献.