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.     

工业设计——再造企业竞争优势的重要手段

工业设计为企业产品创新、差异化战略、企业文化、持续性经营发展提供广泛支持。我国工业企业应强化设计理念 ,注意“人—产品—环境—社会”的协调 ,将产品加工技术和产品开发创新并重。     

企业网站的色彩设计

在互联网上给浏览者带来最强视觉冲击的要素就是网页色彩所以要合理的使用色彩设计来体现出企业网站的特色,体现企业文化,从而使企业成功地在互联网世界中树立形象,增强竟争实力。     

具有自动撮合与视频通信的高校就业网站设计

文章针对传统就业网站功能单一、服务起点低、没有充分发挥网络交互通信作用的弊端,提出了一个具有撮合算法和视频通信功能的新型招应聘网络平台的设计,文章介绍了系统的结构、基于模糊向量的撮合算法以及基于对等通信模型的视频功能实现,对同类研究和设计有一定参考作用。     

高速公路项目进度管理信息系统设计研究

本文从项目管理软件发展现状及高速公路项目进度管理现实需求背景出发,利用生命周期法开发方法,对高速公路项目进度管理信息系统的设计进行研究并提出了系统的方案,具体内容涉及到系统功能模块、网络系统结构和数据库结构设计等几个方面。     

Action Research is Similar to Design Science

In management information systems (MIS) action research is long considered as promising but low-level research approach. It has an utmost relevance because action researchers are working with practitioners to solve the important practical problem. Design science outlined some years ago is just winning a wider audience. Action research was traditionally classified into qualitative research methods. But it seems to be the “wrong” home of action research. We shall show that after comparison of the seven aspects: concrete results of the study, knowledge produced, activities, the intent and the nature of a study, the division of labor in a study and generation, use and test of knowledge, the concordance between the characteristics of action research on the one hand and of design science on the other hand is very good. Hence, action research and design science should next be considered as similar research approaches, and this is a turning point in the history of both action research and design science.     

创业投资公司的后续管理模式设计

文章认为创业投资的后续管理是创业投资机构或专家减少投资风险,确保预期的投资收益率的重要手段。文章以某创业投资公司设计的积极干预型后续管理模式为例,探讨该管理模式把增值服务揉合在监控过程之中,使其能有效地介入创业企业的管理,并进一步突破信息不对称的束缚、减少各种代理风险。     

军事装备物流管理信息系统设计方法研究

阐述了军事装备物流管理信息系统的基本功能；介绍了军事装备物流管理信息系统的构成及各个组成部分的基本知识；在分析军事装备物流管理信息系统工作内容的基础上，运用生命周期法，提出了一种军事装备物流管理信息系统的设计方法。     

喷粉桩在广州地区软基处理中的应用

文章通过分析喷粉桩工作原理,总结广州地区的经验,对喷粉桩的设计提出了见解。     

山区高速公路选线设计的探讨

对在公路建设中如何贯彻可持续发展战略进行了简要论述,阐明了作者的观点;介绍山区公路的特点,对山区公路传统的选线原则提出了不同的看法;结合常德至吉首高速公路湘西段,从整体把握路线方案,平、纵指标分析,局部方案比选等方面谈山区公路选线。