4PL模式下基于时间资源调度的供应成本优化研究

订单时间是影响供应成本的主要因素,合理的进行时间资源调度更是供应成本优化的关键所在。现有的第四方物流(Fourth Party Logistics,4PL)路径优化研究只关注物流环节的时间和成本因素,没有与物流上一环节的整合。本文提出将4PL服务拓展到客户的生产环节,在供应商的生产时间窗约束下,构建模型得到生产时间与物流时间的最优组合方案使供应商供应成本最低。最后基于一个实例的分析,验证了该模型能有效帮助4PL为客户提供最优供应方案。     

一种适用于中小企业污水处理的方法

超导磁分离技术是应用于污水处理的一种新方法,他解决了长期以来的生物和化学处理方式中的生产成本高、占地面积大的弊端.这样不仅使小型企业能够支付运行费用,同时也节省了占用企业的空间.本文介绍了超导磁分离技术的应用范围.独特优势、以及工艺流程.     

Twin dollarization and exchange rate policy

This paper develops a small open economy general equilibrium model with nominal rigidities to study twin dollarization in East Asian economies, a phenomenon where firms borrow in US dollars and also set export prices in US dollars. In this model, we endogenize both the currency of liability denomination and the currency of export pricing. We show that a key factor that affects firms' dollarization decisions is exchange rate policy. Twin dollarization is an optimal strategy for all firms when exchange rate flexibility is limited, which implies that a fixed exchange rate regime may lead to an equilibrium with twin dollarization. Furthermore, we find that twin dollarization can reduce the welfare loss caused by the fixed exchange rate regime, as it helps to cushion the economy against domestic nominal risk.     

未来移动通信发展趋势浅析

随着目前TD-SCDMA技术商用化的开始，我国手机用户将感受到TD—SCDMA技术给我们带来的便捷，但同时TD—SODMA技术目前的不足与缺陷将成为推动4G（TDD—LTE）技术的不断成熟，我们相信4G将成为未来移动通信领域的主导技术，会使我们未来生活更加美好。     

基于词汇知识框架对TEM-4词汇测试试题效度的实证研究

在二语习得研究领域，众多研究学者提出了各种形式相并却又互为补充的词汇知识框架体系，它们为描述词汇知识的各个层面提供了切实可行的具体构架。在国内的学术界，与词汇知识相关的研究主要集中在词汇习得策略上，而词汇知识与词汇测试的相关性研究却鲜有涉及。基于Henriksen提出的词汇知识框架从词汇的宽度和深度两个维度对TEM-4词汇试题的效度进行实证研究，实验结果表明TEM-4词汇试题在历时和共时角度上对词汇知识宽度的测试都有极高效度，但不能充分反映受试者词汇知识深度。     

提高英语单词记忆效率的策略选择

为帮助学生在有限的时间里记忆更多的单词,笔者根据自己多年教学的心得体会,总结、归纳实用有效的四级单词的记忆方法,包括重复循环记忆法、词缀记忆法等,并对具体方法的实施提出了自己的见解。     

Cournot Competition and Hit-and-Run Entry and Exit in a Teaching Experiment

Instructors can use a computerized experiment to introduce students to imperfect competition in courses on introductory economics, industrial organization, game theory, and strategy and management. In addition to introducing students to strategic thinking in general, the experiment serves to demonstrate that profits of a firm fall as the number of competitors is increased in a market and that firms enter profitable markets. The authors have used the experiment in undergraduate classes on strategy and management as well as in master of business administration courses with great success.     

External Financing,Growth and Stock Returns

In this paper we investigate the relation of the value/growth anomaly with the anomaly on corporate financing activities. We confirm and expand earlier results that value/growth and external financing indicators are, to some degree, related predictors of stock returns in the cross section. We show that external financing indicators are incrementally informative since they pick up stock returns associated with earnings quality. Portfolios that combine information from both these indicators generate significantly higher returns than portfolios containing each individual indicator. More importantly, our analysis strongly suggests that the external financing anomaly is, to some extent, distinct from the value/growth anomaly, in that it may also reflect investors’ misunderstanding of the effects of opportunistic earnings management.     

MAINTAINING MARKET POSITION: TEAM PERFORMANCE,REVENUE AND WAGE EXPENDITURE IN THE ENGLISH PREMIER LEAGUE

This paper investigates the relationship between playing success and commercial success in team sports. Utilizing a data set relating to the English Premier League that combines both financial measures and indicators of playing skills and performances, our empirical analysis is based on three behavioural equations. Our analysis indicates that on‐field success can be directly related to players’ skills and abilities and that revenue is positively related to on‐field success. Wage expenditure is also shown to systematically reflect player skills and performances. One interpretation of this evidence is that investment in players’ skills and ability buys on‐field success, with richer teams becoming ever richer and able to maintain or even build upon success by spending more on players than less successful clubs. To the extent that richer clubs are successful in their objective there is a causal link between revenue earned and competitive imbalance via investments in players. The implications of this tendency within a league are discussed in our conclusion, which also considers the potentially wider implications of our study as they relate to the evolution of firm size and issues of market share.     

Aid, Dutch disease, and manufacturing growth

We examine the effects of aid on the growth of manufacturing, using a methodology that exploits the variation within countries and across manufacturing sectors, and corrects for possible reverse causality. We find that aid inflows have systematic adverse effects on a country's competitiveness, as reflected in the lower relative growth rate of exportable industries. We provide some evidence suggesting that the channel for these effects is the real exchange rate appreciation caused by aid inflows. We conjecture that this may explain, in part, why it is hard to find robust evidence that foreign aid helps countries grow.