Upper Bounds on the True Coverage of Bootstrap Percentile Type Confidence Intervals

A simple derivation of expected mean squares is given for the randomized (complete) block design, showing that “experimental error,” the error term for testing treatments, is comprised of three sources of variability: block by treatment interaction, within block plot-to-plot variability, and within experimental plot sampling variation. The approach could readily be extended to incorporate measurement error as a fourth component of experimental error.     

Assembly block storage location assignment at a shipyard: a case of Hyundai Heavy Industries

It is not a trivial issue how to manage assembly blocks at a shipyard. Based on the project experience in Hyundai Heavy Industries, currently the largest shipbuilding company in the world and the leader in the Korean merchant shipbuilding industry, this study points out the difficulties on the block stockyard operations, formalises the assembly block storage location assignment problem, and develops the assembly block storage location assignment algorithm, the purpose of which is to reduce the number of unproductive block moves. Through simulation experiments for various situations, this study demonstrates the usefulness of the assembly block storage location assignment algorithm. In addition, this study examines the impacts of block move sequence rules and of block stockyard layouts on the block stockyard operations.     

股权制衡使公司内部控制更有效吗？——基于通信设备制造业上市公司案例的思考

早前内部控制的研究主要集中于概念框架、影响因素及公司治理失效案例方面,缺乏重点考察股权制衡这一因素对内部控制的作用机理。股权结构是公司治理的基础,不同的股权结构决定了不同的企业治理结构,最终决定了企业内部控制的有效性。相对股权分散和一股独大的股权结构,股权制衡可优化公司内部控制。     

千吨级注塑机十字头轴孔配合的接触分析

针对曲肘式注塑机短连杆与十字头轴孔配合接触部分容易发生疲劳失效状况,以短连杆与十字头轴孔配合接触 对为研究对象,应用有限元法通过等效简化建立有限元接触模型。充分考虑轴孔配合表面接触微粒间的相互作用影响, 运用大型有限元软件ANSYS中的非线性有限元仿真方法,数值计算并分析了不同作用力、不同摩擦系数下接触面的接 触状态。结果表明,轴孔配合在轴受作用力变形后,接触面出现应力集中,接触应力与摩擦应力由轴外侧往内侧逐渐递 增,为分析轴孔配合接触失效提供了一定的依据。     

基于无穷状态转换模型的中国股票市场收益率分析

本文建立一个状态数目由数据决定的马尔可夫转换向量自回归模型,用贝叶斯方法推断模型参数,并利用基于Gibbs分块采样的MCMC方法做逼近。然后本文用此模型和估计方法分析上海A股市场周收益率,结果发现,我国股票市场最可能存在5个不同的状态,状态间的区分首以波动性大小不同为标准,股市除了在初期波动性极小外,从1992年4月开始可以分为两个阶段,在各阶段股市均在三个状态之间转换。     

On Combining Information in Generally Balanced Nested Block Designs

Explicit formulae for analyzing an experiment carried out in a nested block design having the general balance property of some desirable pattern are presented. They follow from a randomization-derived mixed model, decomposed into stratum submodels. Attention is confined here to the combined analysis allowing the information from different strata to be joined together. This article is an extension of some results presented in Caliński and Kageyama (2000 Caliński , T. , Kageyama , S. ( 2000 ). Block Designs: A Randomization Approach, vol. I: Analysis . Lecture Notes in Statistics , vol. 150. New York : Springer .[Crossref] , [Google Scholar]), where the theory underlying the considered analysis is given.     

美国的贸易逆差及中美贸易摩擦成因探析

本文通过国民收入恒等式发现,美国庞大的军费开支、布什政府的减税计划以及低利率政策所导致的高涨的国内投资和过低的私人储蓄是造成近年来美国经常项目赤字迅速增加的主要原因.在美元贬值的背景下,盯住美元的人民币汇率政策妨碍了美国独占其汇率贬值的好处,这或许是激化中美贸易摩擦的关键因素.本文认为,中美经济发展水平的巨大差距导致两国对贸易产品的需求具有不对称性,而这将必然导致中美贸易摩擦长期存在.     

Single replicate orthogonal block designs for circulant partial diallel crosses

Some incomplete block designs for partial diallel crosses have been given in the literature. These designs are obtained by regarding the number of crosses as treatments, and consequently require several replications of each cross. The need for resorting to a partial diallel cross itself implies that it is desired to have fewer crosses. A method for constructing single replicate incomplete block designs for circulant partial diallel crosses is provided in this paper. The designs are orthogonal, and thus they retain full efficiency for estimation of the contrasts of interest.     

Extended ANOVA and Rank Transform Procedures

The rank transform procedure is often used in the analysis of variance when observations are not consistent with normality. The data are ranked and the analysis of variance is applied to the ranked data. Often the rank residuals will be consistent with normality and a valid analysis results. Here we find that the rank transform procedure is equivalent to applying the intended analysis of variance to first order orthonormal polynomials on the rank proportions. Using higher order orthonormal polynomials extends the analysis to higher order effects, roughly detecting dispersion, skewness etc. differences between treatment ranks. Using orthonormal polynomials on the original observations yields the usual analysis of variance for the first order polynomial, and higher order extensions for subsequent polynomials. Again first order reflects location differences, while higher orders roughly detect dispersion, skewness etc. differences between the treatments.     

A note on circular neighbor balanced designs

ABSTRACT

This paper describes some methods of constructing circular neighbor balanced and circular partially neighbor balanced block designs for estimation of direct and neighbor effects of the treatments. A class of circular neighbor balanced block designs with unequal block sizes is also proposed.