On exact D-optimal designs with 2 two-level factors and n autocorrelated observations

In this paper we consider the exact D-optimal designs for estimation of the unknown parameters in the two factors, each at only two-level, main effects model with autocorrelated errors. The vector of the n random errors in the observed responses is assumed to follow a first-order autoregressive model (AR(1)). The exact D-optimal designs seek the optimal combinations of the design levels as well as the optimal run orders, so that the determinant of the information matrix of BLUEs for the unknown parameters is maximized. Bora-Senta and Moyssiadis (1999) gave some conjectures about the exact D-optimal designs based on their experience of several exhaustive searches. In this paper their conjectures are partially proved to be true.Received: January 2003 / Accepted: October 2003Partially supported by the National Science Council of Taiwan, R.O.C. under grant NSC 91-2115-M-008-013.Supported in part by the National Science Council of Taiwan, R.O.C. under grant NSC 89-2118-M-110-003.     

OWNERSHIP STRUCTURE AND FIRM EXIT ROUTES

ABSTRACT

Our study presents empirical evidence about the role of ownership structure for firm exit probability by explicitly differentiating between distinct exit routes (bankruptcy and forced liquidation, voluntary liquidation, mergers and acquisitions – M&A, and removal from the court register). Based on the population of Slovenian firms in the 2006–2012 period and using multinomial probit, our findings support the predictions of agency theory. Ownership concentration, share of the largest owner, and the difference in shares between two largest owners all decrease the likelihood of exit for all studied exit routes but M&A. The magnitude of their impact is largest for exits, in which owners play a decisive role, i.e. voluntary liquidation and removal. The link between the number of primary owners and exit likelihood is U-shaped with the lowest exit probability for firms with around two owners.     

基于作业成本法的高校教学成本计算模式构建研究

本文在论述作业成本法应用于高校教学成本计算的可行性基础上,针对高校教学管理各环节及费用发生的一般特点,分析了作业成本动因与选择,构建了基于作业成本法的高校教学成本计算模式,以其为推动高校教育成本核算体制的建立和财务成本管理水平的提高提供借鉴与参考。     

软件限时开发方法的研究与应用

限时开发是快速应用开发的最佳实践之一。文章介绍了限时开发的基本概念和优点以及适用的项目范围,通过一个进销存软件的开发实例说明如何成功地应用限时开发方法。     

EPC技术在服装行业的应用研究

随着无限射频技术（RFID）在物体标识方面应用的成熟,人们提出了一个基于互联网的全球物联网,即EPC网络,旨在对每一件出厂的产品做到唯一识别,以便跟踪它的整个生命周期.本文分析了服装行业供应链的特点和信息化的需求,在此基础上研究了EPC在服装行业的应用,并对其未来的发展进行了展望.     

节约型社会解读与广义全面价值管理

本文根据节约型社会的基本内涵与经济学解读,对价值涵义及其源泉进行再认识,提出广义全面价值管理方法论。     

引入供应链管理思想实现军事物流跨越式发展

供应链管理是物流管理的发展方向和趋势，是一体化的物流管理，是一种新的管理理念和模式。在军事物流领域借鉴和引入供应链管理思想，对提高军事物流保障能力和效益，促进军事物流跨越式发展提供了重要的契机和理论依据。本文从供应链管理的科学内涵、引入供应链管理的必要性以及应关注的几个问题等三个方面进行了论述。     

实用电机磁场检测电路及应用

文章介绍一种简单、实用、可靠的电机欠磁失磁检测电路及应用。在电气传动系统中该电路能有效地保证电机的安全运行。     

基于粒子群优化的模糊聚类分析

基于求解实优化问题时,粒子群优化算法优于遗传算法。在基于遗传算法的模糊C均值聚类算法基础上,给出了基于粒子群的模糊C均值聚类算法,试验结果表明:该算法克服了传统的模糊C均值聚类算法的缺陷,同时在收敛速度方面明显优于基于遗传算法的模糊C均值聚类算法。     

中国转基因食品安全管理的现状及对策

转基因食品是当今世界各国基因研究的重点。我国的转基因技术发展迅速,但科学界在转基因食品对人类健康和生态风险方面的认识存在局限性,政府应制定相应的政策、措施对其进行安全管理。本文介绍了转基因食品的概念及在我国的发展情况,分析了我国转基因食品安全管理的现状,阐述了转基因食品安全管理的重要性,并针对其中存在的问题,提出相应的对策。