Empirical Non-Parametric Control Charts: Estimation Effects and Corrections

Owing to the extreme quantiles involved, standard control charts are very sensitive to the effects of parameter estimation and non-normality. More general parametric charts have been devised to deal with the latter complication and corrections have been derived to compensate for the estimation step, both under normal and parametric models. The resulting procedures offer a satisfactory solution over a broad range of underlying distributions. However, situations do occur where even such a large model is inadequate and nothing remains but to consider non- parametric charts. In principle, these form ideal solutions, but the problem is that huge sample sizes are required for the estimation step. Otherwise the resulting stochastic error is so large that the chart is very unstable, a disadvantage that seems to outweigh the advantage of avoiding the model error from the parametric case. Here we analyse under what conditions non-parametric charts actually become feasible alternatives for their parametric counterparts. In particular, corrected versions are suggested for which a possible change point is reached at sample sizes that are markedly less huge (but still larger than the customary range). These corrections serve to control the behaviour during in-control (markedly wrong outcomes of the estimates only occur sufficiently rarely). The price for this protection will clearly be some loss of detection power during out-of-control. A change point comes in view as soon as this loss can be made sufficiently small.     

垂叶榕的生物学习性及栽培管理技术

垂叶榕是城市绿化和园林造景中应用的一种重要树种,本文就垂叶榕的生物学习性及在绿化和盆景制作中的管理技术作一简要概述。     

新资本结构理论综述

随着资本结构研究的深入,理论界进一步放宽MM定理的基本假设。以Jensen,Myers,Ross,Leland,Harris,Hart等学者为代表的新资本结构理论引入最新的研究方法,对资本结构展开分析。本文按照新资本结构理论发展的历史轨迹,全面评述了资本结构理论中最为重要的各种理论,同时系统地描述了各有关理论的基本内容。     

用于分散电压控制的规则库法

电力系统正常运行时,无功/电压控制目的是安全经济供电.而在紧急情况下,首要目标是运行的安全性,其次才是经济性.本文提出的局部网概念及其灵敏度矩阵,以及对电压违限严重性的分级和控制战略,使控制更为快速有效.此法更适用于当事故引起全系统运行数据不全时对局部网的电压控制.     

进入权与组织控制

本文深入讨论了R-Z理论的两个核心概念:进入权和人力资本专用性投资,指出进入权的配置过程伴随着代理人进行专用性投资和委托人持续控制的过程,而组织控制构成了委托人对进入权配置过程进行持续控制的基础。委托人必须借助组织控制限制代理人的讨价还价能力,一个关键途径就是减弱代理人拥有的不对称信息优势。     

我国上市公司控制权转移绩效研究——基于经营业绩的分析

已有对公司并购绩效的研究没有得出一致结论,本文运用会计研究法研究公司控制权转移的绩效,文章利用主成分分析方法计算公司经营业绩综合得分,分析控制权转移方式、第一大股东性质变动、转让的股权比例、高管变动等因素对控制权转移后公司业绩变动的影响,并考察控制权转移中是否存在盈余管理问题。研究表明,控制权转移没有显著提高公司业绩,业绩的提高反而是部分来自于盈余管理。说明现阶段市场环境下我国上市公司控制权转移不仅不是代理问题的解决方法反而是代理问题的表现形式。     

Construction of Fuzzy Control Charts Based on Weighted Possibilistic Mean

The problem of constructing control charts for fuzzy data has been considered in literature. The proposed transformation approaches and direct fuzzy approaches have their advantages and disadvantages. The representative values charts based on transformation methods are often recommended in practical application. For representing a fuzzy set by a crisp value, the weight of importance of the members assigned with some membership levels in a fuzzy set should be considered, and the possibility theory can be employed to deal with such problem. In this article, we propose to employ the weighted possibilistic mean (WPM), weighted interval valued possibilistic mean (WIVPM) of fuzzy number as a sort of representative values for the fuzzy attribute data, and establish new fuzzy control charts with WPM and WIVPM. The performance of the charts is compared to the existing fuzzy charts with a fuzzy c-chart example via newly defined average number of inspection for variation of control state.     

动词复制句中的附加语控制

动词复制句（Verb－Copying Construction，VCC）是一种在汉语口语中经常使用的结构，用符号可以简单地表示为S＋VP1＋VP2，动词V2是动词V1的拷贝。这种结构本身具有独特的句法语义特征，也具有不同的句法变体。在其进行句法运算时，两个动词性结构首先独立运算，VP1作为附加语，VP2作为主句成分进入句法推导。通过附加语侧向移位、附加合并以及主题化特征核查等句法操作形成语言表达式。其句法变体的不同构型是因为不同的控制类型造成的。     

An integrated model based on statistical process control and maintenance for two-stage dependent processes

The close relationship between quality and maintenance of manufacturing systems has contributed to the development of integrated models which use the concept of statistical process control (SPC) and maintenance. This article demonstrates the integration of the Shewhart individual-residual (Z_X ? Z_e) joint control chart and maintenance for two-stage dependent processes by jointly optimizing their policies to minimize the expected total costs associated with quality, maintenance and inspection. To evaluate the effectiveness of the proposed model, two stand-alone models—a maintenance model and an SPC model—are proposed. Then a numerical example is given to illustrate the application of the proposed integrated model. The results show that the integrated model outperforms the two stand-alone models with regard to the expected cost per unit time. Finally, a sensitivity analysis is conducted to develop insights into time parameters and cost parameters that influence the integration efforts.     

Neighborhood conditions,religious coping,and uncontrolled hypertension

The purpose of this study is to see whether God-mediated control beliefs moderate the relationship between living in rundown neighborhoods and uncontrolled hypertension. God-mediated control refers to the belief that God will help people handle the stressors that arise in life. Data are provided by a nationwide survey of adults (N = 1919). Three ways of assessing uncontrolled hypertension are examined: a binary format contrasting people with and without uncontrolled hypertension, systolic and diastolic blood pressure scored continuously, and a four ordinal category scheme recommended by the American Heart Association. The data suggest that stronger God-mediated control beliefs moderate the relationship between neighborhood conditions and uncontrolled blood pressure when blood pressure is scored continuously and when the American Heart Association scheme are used as outcomes.