Current account balance cyclicality

We assess the cyclicality of current account balances for the period 2001Q1–2014Q4, focusing on Portugal and using Germany as a benchmark. We find that the cyclical component of the current account was positively explained by 3-month Euribor, but negatively by the financial crisis, systemic stress in Europe, employment and compensation of employees. Moreover, the noncyclical current account was positively affected by the period of the economic and financial adjustment programme and the terms of trade, but negatively influenced by financial integration.     

基于三维软件的机械制图测绘教学实践初探

文章分析了当前机械制图测绘中存在的问题,并联系当前机械制造领域的发展趋势,以齿轮泵为例,使用Pro/E软件对机械制图测绘实践课程进行了教学改革,效果理想。     

基于Pro/E的带压堵漏夹具三维设计与安装

本文通过实例介绍了用Pro/E对带压堵漏专用夹具的设计与装配过程及带压堵漏安装工艺,解决了炼油、乙烯、氯碱、燃气、化工、发电厂、造纸厂、舰船、物业和家庭等各类管道、阀门、法兰和容器罐腐蚀穿孔跑冒滴漏,造成生产受阻问题,保证了各类生产单位及工厂的长周期运行。     

透明胶纸座的创新设计

在新世纪的中国,创新性是我国经济转型的重中之重,而创新设计是实现创新性的关键。创新过程其实与创新构思的产生到实现利用,是我国发展新型高新技术型经济的关键,集中密集型经济模式已经不能符合本国情。在整个创新理念产生阶段,要到实践中去考察,以发现创新理念是否实用,在现实中加强、丰富;在创新性得到证实后就是创新过程中另一阶段,在次阶段,使用三维设计软件,来实行虚拟概念到虚拟图像的转化,最后通过三维设计软件Pro/E实现图形绘制。     

Pro／E与Ansys组合在空心阶梯轴设计中的应用

Pro／E软件拥有强大的CAD模块，在建模方面有其突出的优势，但其有限元分析模块却不够完善，而Ansys软件则与其相反。将两者结合起来，将能对一些关键的零部件诸如轴类、箱体类等零件的变形、应力集中等问题进行校核，从而最大限度减少因设计问题而造成零部件在实际应用中失效。以FY113型废烟支处理机剖切装置的空心阶梯轴为例，运用Pro／E软件和Ansys软件相结合来对其进行应力校核，说明Pro/E与Ansys组合在设计中的应用，从而提供一种完善的设计手段。     

基于Pro/E的带式输送机滚筒有限元分析

在Pro/E软件环境里建立带式输送机滚筒的有限元模型,用Pro/MACHANICA模块对滚筒进行有限元分析,得出滚筒的应力图,为滚筒的设计提供依据.     

基于计算机辅助在数控加工制造中的应用分析

随着时代的不断变化,人们对生活水平的要求也在不断的提高,为了加快社会发展,人们已经在计算机科学技术方面取得了一定的成绩,并且推动了社会经济的发展。目前为了提高数控加工制造的生产效率和加工质量,人们已经将计算机辅助应用到了数控加工制造中。本文以Pro/ENGINEER软件为例,讨论了Pro/ENGINEER软件在使用过程中和其他计算机辅助软件的区别,论述了计算机辅助系统的制造过程和实际应用,以供相关人士参考。     

Pro/E课程的教学改革研究

在Pro/E软件教学中,力争在机房授课的同时改变传统的教学方法与考核方式,运用案例教学法,使学生积极参与教学活动,激发学生学习兴趣,培养学生学习的主动性。通过对实体零件建模方法的分析讨论,培养学生自主学习、理论联系实际的能力,并达到提高Pro/E软件的教学质量和教学效果的目的,真正做到学以致用。     

Oil shocks and fiscal policy procyclicality in Angola: Assessing the role of asymmetries and institutions

The aim of this article is to examine procyclicality in Angola, assess whether it behaves asymmetrically over the oil cycle, and test the hypothesis that institutions and fiscal rules can moderate procyclicality. Received wisdom suggests that in resource‐rich economies, fiscal policy tends to be procyclical albeit improvements in the past decades due to institutional reforms. Similar evidence is available for oil‐rich economies; however, we know little about how procyclicality behaves over the oil cycle; that is, whether spending (and revenue) grows faster during oil‐market booms, than during downturns. Further, evidence on institutions and fiscal rules in oil‐exporting economies is still ambiguous. We bridge both gaps by examining fiscal policy procyclicality in Angola, one of the largest oil‐producers in Africa, and a country that has experienced an intense process of institutional reforms since 2002. Therefore, it is an ideal candidate for our study. We use data for the 2004–2014 period to estimate a threshold vector error correction model that extends vector autoregressive and vector correction methods used up to date. Our results indicate that revenue and spending are generally procyclical to oil shocks, that revenue is more procyclical during booms, and that institutional quality, net inflows, financial openness, and fiscal rules affect procyclicality.     

关于Pro／E环境变量设置的探讨

通过Pro／E系统配置文件，合理设置的环境变量，可以提高设计质量，缩短开发周期，使设计更加轻松，使Pro／E充分发挥出其强大的功能，真正成为我们设计的有利工具。