国外资信评级的相关研究述评

国外资信评级机构已经存续了近百年,在资本市场上发挥着重要的作用。关于资信评级的研究也已积累了丰富的成果,内容涉及资信评级的作用、决定因素、信息价值以及级别的可比性一致性等。文章回顾并评论了国外有关资信评级的研究成果,并在此基础上提出了我国资信评级的理论研究应关注的问题。     

供应商质量管理

随着企业间的竞争不断加剧,很多企业逐渐把企业的非核心业务外包出去,产品生产已不再是由一家企业单独完成,而是由供应链上的各个成员企业共同协作完成,因此,供应商质量管理成为企业的一个重要课题.文章探讨了对供应商的选择及其动态管理的方法,以期达到提高企业质量管理水平,创造良好效益的目的.     

信用交易保证金与股价波动关系研究

通过对境外市场保证金变动对股价波动影响的实证结果进行梳理后发现,保证金的调整对市场波动产生两种相反的效果,即流动性效果和投机性效果,保证金对市场波动的影响取决于两种效果的力量对比,如果流动性效果较强,则调整保证金对股价波动无影响或加剧市场波动,反之,则会减轻市场波动。     

供应链环境下基于RFID和Multi-Agent的仓储管理系统研究

根据RFID技术和Multi—Agent技术的特点,结合前人对RFID技术或Multi—Agent技术在物流领域尤其是在供应链和仓库管理中的应用,文章将RFID技术、Multi—Agent技术和库存管理系统相结合,设计出一套集成的仓储管理系统框架。并提出了在供应链环境下基于该框架的网络图：最后指出,可以结合JADE平台技术做进一步开发。     

水压作用下房屋地下室底板开裂的结构处理

地下水压力过大引起房屋地下室底板钢筋混凝土开裂,甚至被破坏,文章介绍采用钻孔桩加固技术进行结构处理,并新作防水层防水。     

REVERSE REGRESSIONS AND LONG‐HORIZON FORECASTING

Long‐horizon predictive regressions in finance pose formidable econometric problems when estimated using available sample sizes. Hodrick in 1992 proposed a remedy that is based on running a reverse regression of short‐horizon returns on the long‐run mean of the predictor. Unfortunately, this only allows the null of no predictability to be tested, and assumes stationary regressors. In this paper, we revisit long‐horizon forecasting from reverse regressions, and argue that reverse regression methods avoid serious size distortions in long‐horizon predictive regressions, even when there is some predictability and/or near unit roots. Meanwhile, the reverse regression methodology has the practical advantage of being easily applicable when there are many predictors. We apply these methods to forecasting excess bond returns using the term structure of forward rates, and find that there is indeed some return forecastability. However, confidence intervals for the coefficients of the predictive regressions are about twice as wide as those obtained with the conventional approach to inference. We also include an application to forecasting excess stock returns. Copyright © 2011 John Wiley & Sons, Ltd.     

How does growth need strength influence employee outcomes? The roles of hope,leadership, and cultural value

Abstract

Strong growth need is essential if an employee is to be motivated to complete complex and challenging jobs. It is important for organizations to attract employees with high growth need strength and help them achieve positive outcomes. However, limited research has been conducted to examine the mechanism underlying growth need strength’s positive effect on employee outcomes. Based on hope theory, we hypothesized that hope mediates the effect of growth need strength on job performance and affective commitment by transforming employees’ general desire for personal growth into goal-related cognitive thinking, comprising both ‘will’ and ‘ways’. We further hypothesized the moderating effect of transformational leadership, and the joint moderating effect of transformational leadership and individual power distance on the relationship between growth need strength and hope. We tested our hypotheses with data from a sample of 265 subordinate–supervisor dyads from China. Data analysis results supported the mediating role of hope. We found that growth need strength has a stronger effect on hope when transformational leadership is higher, and this effect is the strongest when both transformational leadership and individual power distance are simultaneously higher. The implications of these findings for human resource management research and practice are discussed.     

张力控制系统在变频造纸设备中的应用研究

张力控制在变频造纸设备中的应用是造纸业的控制难题。本文构建了变频造纸设备张力控制系统模型,通过张力检测装置采集张力值,经PLC接收和判定,最终组成了直接张力控制系统,有效地保证了张力的恒定。同时采用Simulink工具箱,模拟和分析了Matlab软件环境下张力控制系统的仿真运行,最终证实了张力控制系统在变频造纸设备应用中的可行性,为张力控制系统的后续研究与发展指明了方向。     

浅析GPS测绘新技术在建筑工程项目中的运用

现代化的GPS测绘技术在建筑施工项目当中有着重要的应用,而深入的对应用的范围和层面进行细致的分析,将有助于增强GPS测绘的使用水准。文章将针对这一方面的内容展开论述,详细的分析了GPS测绘在建筑施工项目当中的实践使用情况,同时对GPS测绘的要点和技术的难点、创新点等进行了深入的探讨,旨在全面的增强和促进GPS测绘技术的改进,为GPS测绘技术的发展奠定坚实的基础。