A Sparse Implementation of the Average Information Algorithm for Factor Analytic and Reduced Rank Variance Models

Factor analytic variance models have been widely considered for the analysis of multivariate data particularly in the psychometrics area. Recently Smith, Cullis & Thompson (2001) have considered their use in the analysis of multi‐environment data arising from plant improvement programs. For these data, the size of the problem and the complexity of the variance models chosen to account for spatial heterogeneity within trials implies that standard algorithms for fitting factor analytic models can be computationally expensive. This paper presents a sparse implementation of the average information algorithm (Gilmour, Thompson & Cullis, 1995) for fitting factor analytic and reduced rank variance models.     

财务治理效率：决定公司治理中的核心地位

财务治理从公司内部治理入手,抓住关键控制权———财权以及关键信息———财务信息和相应的激励机制,在治理目标上超越权力的制衡,对公司的财务决策与经营效率起到有效的制度保障作用,真正体现了治理的效率与公平,决定了其在公司治理中的核心地位。     

汉字字形结构蕴涵文化信息的特性

汉字字形蕴涵文化信息,具体体现在字形结构之中。字形结构蕴涵文化信息具有意象的直观性、构件结体的整体化合性和字形结构组合的辩证性。     

用Office实现学报编辑部办公信息化管理

从编辑部工作需要的角度,用Office作为应用软件系统,具体阐述了学报编辑部实现处理稿件信息化管理的建库工作.论述了综合运用Word、Excel和Access实现编辑部稿件处理过程的信息化管理途径.用Office完成编辑部工作的信息化管理,为编辑部的信息网上传播提供了坚实的基础和广阔的空间.     

Some results on optimality in models with heteroscedastic errors from partial optimum designs

This paper studies optimum designs for linear models when the errors are heteroscedastic. Sufficient conditions are given in order to obtainD-, A- andE-optimum designs for a complete regression model from partial optimum designs for some sub-parameters. A result about optimality for a complete model from the optimality for the submodels is included. Supported by Junta de Andalucía, research group FQM244.     

信息资源会计:企业信息化效益计量和评价的新思路

全面系统地对信息资源投入和收益的计量和评价一直是推动企业信息化工作的难点 ,解决该问题的一个新思路是 :信息资源会计。信息资源是广义的概念 ,即包括信息内容和信息技术、设施、人员等全部支持要素在内。企业信息化必然要投入信息资源 ,结果会引起组织资源配置的变化和重新组合 ,以货币价值形式计量、分析、评价这一过程就是信息资源会计的主要职能。     

信息技术与中外语教学

本文从七个方面探讨了信息技术对中外语教学的变革,并从四个方面对政府和高校的教学管理部门提出适应变革的建议。     

Neighborhood Structure,Social Organization,and Number of Short‐Term Sexual Partnerships

We examine the relationship between neighborhood structural characteristics, social organization, and the sexual partnering practices of adults. Analyses of 1990 census and 1995–1997 survey‐based data on Chicago neighborhoods and adult sexual activity reveal for men a number of neighborhood influences on sexual partnering practices. First, residential stability is negatively associated with having a short‐term sexual partner in the last year. Second, neighborhood social ties are positively associated with short‐term sexual partnering in neighborhoods with low levels of collective efficacy—the combination of cohesion and shared expectations for beneficial action among neighbors—but this effect is substantially reduced as collective efficacy increases. Moreover, neighborhood collective efficacy and social ties mediate the effect of residential stability on sexual partnering practices. Neighborhood characteristics were not associated with short‐term sexual partnering for women.     

论信息时代提高学术期刊竞争力的措施

信息时代对学术期刊提出了更高要求.为了适应时代的要求,在激烈的竞争中立于不败之地.学术期刊必须提高竞争力.本文从提高编辑队伍的综合素质、提高刊物质量、利用多种途径扩大刊物的影响、加强编辑部内部的管理等四个方面提出了提高学术期刊竞争力的几项措施.     

B股与H股及红筹股之间的溢出效应与信息流动

运用向量GARCH-M模型检验了B股与H股及红筹股之间的溢出效应与信息流动.实证结果表明:红筹股对沪深市B股、H股对沪市B股的收益和波动溢出效应均显著存在,而反向的溢出效应均不显著,表明信息是从红筹股向沪深市B股、从H股向沪市B股单向流动的;深市B股与H股之间相互的收益溢出效应均存在,而波动溢出效应均不存在,信息在H股和深市B股之间的流动情况不明显;在信息流动过程中,红筹股始终处于信息领先地位.