On estimating the mean of the selected normal population under the LINEX loss function

Following Parsian and Farsipour (1999), we consider the problem of estimating the mean of the selected normal population, from two normal populations with unknown means and common known variance, under the LINEX loss function. Some admissibility results for a subclass of equivariant estimators are derived and a sufficient condition for the inadmissibility of an arbitrary equivariant estimator is provided. As a consequence, several of the estimators proposed by Parsian and Farsipour (1999) are shown to be inadmissible and better estimators are obtained. Received January 2001/Revised May 2002     

《国际物流管理》课程教学改革的研究

本文针对目前《国际物流管理》课程教学中存在的一些问题，本着以学生为中心的宗旨。运用教育学相关理论，对课程教材的建设和完善、教学形式的丰富、教学内容的调整、教辅手段的运用、学生课业的考核方法、试题库及资料库的建设、师资培养、教师绩效管理等方面进行了全方位的探索和研究。     

Technological proximity and the choice of cooperation partner

This paper provides empirical tests of hypotheses of cooperative behavior provided by evolutionary approaches in the resource-based view of the firm. The influences of “technological proximity”, individual incentives to cooperate and managerial tools to the choice of research partner are analyzed. Using German patent data we can show the positive influence of those three determinants. The results of this paper confirm theories dealing with the path-dependency of research activities.      

供应链集成下的企业采购管理

供应链集成下的采购管理是供应链管理的重要内容之一，基于供应链的采购管理模型利用现代信息技术的成果解决了供应链中核心企业与供应商之间的联系问题。供应链集成下的企业采购管理策略从本质上讲是一种理念，旨在提高采购管理的效率，降低企业采购的成本，建立新的供需合作模式。     

企业物流系统的经济评价方法探析

文章通过对物流成本概念及其特性和物流成本系统化控制的分析,运用物流活动的经济评价的方法对物流系统的成本进行动态的经济评价,为企业提供物流成本控制与管理依据,以便企业能够及时准确的进行调整更有效更迅速的优化系统,使企业的物流成本大大降低,从而增强企业的竞争力。     

报废汽车回收体系结构模型研究

报废汽车的回收重用一方面是＂生产者责任延伸制＂在汽车行业贯彻实施的结果,另一方面来源于再制造环节中蕴藏的丰厚利润的诱导.目前我国回收利用报废汽车的方式比较落后,主要是对原材料进行重用.本文构建了一个由汽车制造商牵头纽建,以功能多样化的回收中心作为中心处理单元的报废汽车回收体系结构模型,以期实现更高层次的回收重用.     

论外向型经济对中国中部崛起的影响

文章介绍了外向型经济的概念、内容、类型,分析了中部地区的基本情况及存在的问题,论述了外向型经济对中国中部崛起的影响。     

VE在油田开发中的应用

孤岛采油厂历经30多年的开发,已处于特高含水期产量递减阶段。由于新井产量受到自然资源和投资的限制是有限的,要减缓原油产量的递减,依靠的是大量增产措施的投入,而每项措施的实施需要耗费几万元到几十万元的费用。所以,引起开发后期油田成本上升的主要原因是油田增产措施难度加大,投入相应增加。为此,我们引入VE原理,科学实施增产措施工作量,达到了降低作业成本,提高增油效果的目的。     

基于不完全契约理论的军队运用地方第三方物流思考

文章以不完全契约理论的视角，分析了军队用户与地方物流服务商的契约所具有更为显著的不完全性，提出了强化军事物流服务商管理机制、构建含有军事物流服务商的信息网络、加强有军事物流服务商参加的物流演练等对策。     

A new bivariate distribution in natural exponential family

We propose a new bivariate distribution following a GLM form i.e., natural exponential family given the constantly correlated covariance matrix. The proposed distribution can represent an independent bivariate gamma distribution as a special case. In order to derive the distribution we utilize an integrating factor method to satisfy the integrability condition of the quasi-score function. The derived distribution becomes a mixture of discrete and absolute continuous distributions. The proposal of our new bivariate distribution will make it possible to develop some bivariate generalized linear models. Further the discrete correlated bivariate distribution will also arise from an independent bivariate Poisson mass function by compounding our proposed distribution (Iwasaki and Tsubaki, 2002).Received March 2003