自动涂胶系统胶枪的热分析

为研究自动涂胶系统的胶枪最优材质、最佳热源位置和最佳测温位置,利用ANSYS Workbench软件对自粘胶胶枪进行数值模拟.通过分析不同材质胶枪的温度场分布情况,结合经济性和加热性能,选定最优胶枪基材.同时分析得出加热自粘胶至工作温度的时间和保持工作温度的加热功率,确定了热源和测温点位置,拟定了升温策略.进行自粘胶胶枪加热试验,验证了仿真分析结果的准确性.     

Debt Issue Costs and Issue Characteristics in the Market for U.S. Dollar Denominated International Bonds

This paper analyzes the issue costs and initial pricing of bonds in the international market. In particular, we investigate the determinants of three components of issue costs: underwriter fee, underwriter spread (the difference between the offering price and the guaranteed price to the issuer), and underpricing (the difference between the market price and the offering price). Total underwriter compensation increases with the bonds' credit risk and maturity, but it is insignificantly related to issue size. Interestingly, underwriters appear to price some issue characteristics directly (by adjusting the fee) and other characteristics indirectly (by setting the guaranteed price). The two compensation components (fee and spread) are negatively related to each other. We provide evidence that this trade-off is consistent with income tax considerations, as well as with two-tier pricing by underwriters. We find no evidence of underpricing.     

Intraday Lead-Lag Relationships Between the Futures-, Options and Stock Market

In rational, efficiently functioning and complete markets, returns on derivative and underlying securities should be perfectly contemporaneously correlated. Due to market imperfections, one of these markets may reflect information faster. The use of high-frequency data and the choice for a small unit time interval to measure these lead-lag relations comes at the cost of some or many missing observations, causing traditional estimators to either under- or overestimate covariances and correlations. We use a new estimator to estimate lead-lag relationships between the cash AEX index, options and futures. We find that futures returns lead both options and cash index returns by approximately 10 minutes. The relationship between options and the cash market is not completely unidirectional.     

Programme Evaluation with Unobserved Heterogeneity and Selective Implementation: The Mexican PROGRESA Impact on Child Nutrition

This paper considers the impact of Programa de Educación, Salud y Alimentación ( PROGRESA ), a large Mexican rural anti-poverty programme that had an evaluation sample in which overall treatment was randomly assigned to some communities but not others, on child nutrition. When we examine the impact of PROGRESA based on the presumption of randomized allocations, we find that PROGRESA had no or even a negative impact on child nutrition. However, not all children designated to receive nutritional supplements actually did so. Our preferred estimates – child fixed-effects estimates that control for unobserved heterogeneity that is correlated with access to the supplement – indicate a significantly positive and fairly substantial programme effect of the nutritional supplements on children 12–36 months. They imply an increase of about a sixth in mean growth per year for these children and a lower probability of stunting. Effects are somewhat larger for children from poorer communities but whose mothers are functionally literate. The long-term consequences of these improvements are non-trivial; its impact working through adult height alone could result in a 2.9% increase in lifetime earnings.     

乡镇企业发展的困境与思路——赤湖镇乡镇企业发展情况调查

乡镇企业自产生以来就为解决农村富余劳动力,促进农村经济的发展与稳定,及国民经济持续、稳定、快速地发展作出了重大的贡献。但是,随着国民经济进一步向纵深方向发展,乡镇企业自身的缺陷日益显露出来,加之国内外竞争环境发生了深刻变化。这势必影响乡镇企业潜力的充分发挥与健康发展。如何挖掘发展潜力正是当务之急。本文旨在剖析制约乡镇企业发展的深层次因素,借鉴成功范例的经验,谋求其的新发展。     

促进武汉房地产业健康发展的若干思考

近年来，武汉市房地产业得到一定程度的发展，但是房屋结构失衡、空置房比例过高、市场管理混乱等问题阻碍了房地产业的正常运行。为此，必须深化改革，加强管理，规范市场，促进我市房地产业的健康有序发展。     

食用菌无公害、经济型保鲜技术研究进展

该文从食用菌保鲜的机理出发,对各种保鲜技术从有无公害、是否经济有效的角度进行了对比研究,以求得到既经济有效又无残留的食用菌保鲜技术,并对无公害食用菌发展的前景进行了分析。     

浅谈企业房地产价值信息的背离与披露

房地产交易中企业财务报告反映的房地产账面价值与实际市场价值的背离程度大,造成了企业资产价值的“低估”。该文试图分析引起企业房地产账面价值与实际市场价值背离的原因,提出了财务报告使用者了解企业房地产实际价值的几种可操作方法。     

浅析《查尔德·哈洛尔德游记》的思想主旨及艺术倾向

拜伦是19世纪初期英国杰出的诗人,长诗《查尔德.哈洛尔德游记》是其代表作。该诗揭露了当时欧洲许多国家政府压迫、奴役人民的残酷现实,歌颂了人民的解放斗争,表现了作者反对侵略和压迫,主张民主和自由的先进思想,体现了拜伦浪漫主义的艺术倾向。