原油降凝剂的研究进展

本文概述了原油降凝剂的发展概况、作用原理和近年来的发展趋势以及今后应重点解决的问题。     

The Role of Information Feedback in the Management Group Decision-Making Process Applying System Dynamics Models

The research project addresses the influence of feedback information on the decision process supported by the application of system dynamics models. A user-friendly application was developed and used in the experiment with decision groups. The participants were 174 undergraduate management science students. They had the task of determining the optimum business strategy by maximizing the multiple criteria function under three experimental conditions: a ₁) an indivIDual decision process without the support of a system dynamics model, a ₂) an indivIDual decision process supported by a system dynamics model, and a ₃) a decision process supported by a system dynamics model and subject interaction via computer mediation. The hypotheses that the indivIDual decision process supported by a system dynamics model yields higher Criteria Function values than one without a system dynamics model, as well as the decision process supported by both a system dynamics model and subject interaction yields higher Criteria Function values than one supported by a system dynamics model alone were confirmed.     

Influence measures on profile analysis with elliptical data through Frèchet’s metric

In this paper, from Frèchet’s metric, diagnostic tools are constructed for the detection of influential observations in Profile Analysis with elliptically distributed random errors . This distributional hypothesis allows the application of the proposed diagnostics to a wide variety of random experiences, not only for data from a multivariate normal distribution but also from other symmetric distributions, commonly used in studies of several sciences. The diagnostics are based on Frèchet’s distance between the distributions of the basic statistics in Profile Analysis, in the postulated model and in the perturbed model obtained by deleting an observation from the sample data. This metric is highly useful since it enables the analysis of the influence on the point estimation and the estimation error. Applications on two data sets are provided.     

张肇达:摇滚东方时尚

长风当铮,大音再起. 一场新的时尚摇滚就在这位时装设计师的心中澎湃. 张肇达,已经让人们习惯于每年来一场时尚的巅峰体验.     

透视我国大陆港口发展现状

随着我国经济高速发展和进出口贸易增长速度加快,我国的海运市场和港口得到了迅速的发展。文中特别详细的介绍了我国各大港口,如上海港、深圳港、青岛港、天津港以及宁波港的现状与发展趋势,分析了港口间竞争激烈的形势及各自发展前景。     

陈敏出温州记

豹首崭露出温州 尽管我个人并非基督教徒,不过摩西带领新徒们"出埃及记"的故事倒引发我的兴趣. 不久前在上海世贸商城已试营业的"上海瓯派联实业发展有限公司"(EURO)的大展示厅前再次见到了陈敏时,我忽然陡觉他正是在开创着"出温州记"的新篇章.     

风险与机遇苏拉纺织机械集团国际业务总监安歌华专访

"WTO关于纺织品与服装协议(多国纤维协定)的中止导致了世界纺织品市场巨大的不稳定性,这一市场动荡已在2004年下半年和2005年上半年显露出来,但已逐渐平息.另一方面,纺织产业仍然存在很多闲置的产能,特别是在中国,近年来扩建的产能仍有部分搁置.虽然苏拉的机械传送部门由于强大的市场需求在赢利,但却不能完全抵消我们纺织部门的市场疲软造成的亏损."这段话摘自苏拉集团2005年7月26日题为<充满信心地返回纺织市场-传送系统的需求活跃-盈利归功于TEMPUS项目的实施>的股东年报,由此可以看出,中欧、中美纺织品贸易摩擦不仅给中国纺织企业带来了不利影响,也给外资在华纺织投资企业带来了不利影响.但是,最近苏拉集团基于对中国的市场分析和判断,进一步加大了对华投资.这种矛盾做法让业内人士有了些许疑惑.9月初,恰逢苏拉纺织机械集团国际业务总监安歌华(Andreas Engelhardt)来京进行商务活动,本刊记者就相关话题对他进行了专访.     

Contribution of financial market segments at different stages of development: Transition,cohesion and mature economies compared

What is the impact of financial sector segments at different stages of development? We apply a production function approach to investigate the impact of the credit, bond and stock segments in nine EU-accession countries over early years of transition (1996–2000) and compare these to mature market economies and to countries at intermediate stage. We find that the transfer mechanisms differ over the development cycle (from bond markets to educational attainment to labor participation) and that financial market segments with links to the public sector (but not stock markets) contributed to stability and growth in transition economies.     

Foreign players,team production,and technical efficiency: Evidence from European soccer

As on-field success is nowadays the main objective of European soccer clubs, good management needs to extract the highest sport success from the squad talent at hand. Because teams differ in their quality, performance needs to be compared with the best practice of comparable units. One remarkable source of heterogeneity across teams is the squad composition, which can produce gains from diversity together with communication costs. The paper studies the efficiency in sporting performance of soccer teams, paying attention to how the number of foreign players relates to productive inefficiency. Using data for 146 teams in the top 5 European leagues during 10 seasons, we estimate a double heteroskedastic True Random Effects Stochastic Frontier team production function. We find that (i) the number of passes, ball recoveries, and shots from the penalty area improve team efficiency, and (ii) a higher number of foreign players increase inefficiency. Our findings suggest that gains from squad diversity might be offset by communication costs.