超声波-曝气协同降解聚丙烯酰胺溶液的研究

研究了超声波-曝气协同工艺降解聚丙烯酰胺溶液的条件和效果。结果表明,在超声波处理聚丙烯酰胺溶液时,引入曝气后,比单纯超声的降解效率大有提高。     

Risks and returns in international currency futures

Conclusion This paper analyzed the risk/return level of international currency futures traded on International Monetary Market of Chicago during 1972–1977 period. The empirical results indicate that relative risk and returns for each currency future studied are both close to zero during the sample period. The fact that the beta value for currency futures is close to zero implies its returns are uncorrelated with the market portfolio. Therefore, investors can reduce the risk level of their total portfolio significantly by adding currency futures.     

Looking for risk premium and contagion in Asia-Pacific foreign exchange markets

This article tests pure contagion effects among four Asian foreign exchange markets, namely, Japan, Hong Kong, Singapore, and Taiwan during the 1997 Asian crisis. A conditional version of international capital asset pricing model (ICAPM) in the absence of purchasing power parity (PPP) is used to control for economic fundamentals or systematic risks. The empirical results show strong contagion effects in both conditional means and volatilities of those markets after systematic risks have been accounted for. Specifically, the contagion-in-mean effects are mainly driven by the past return shocks in Hong Kong, Singapore, and Taiwan. As for contagion in volatility, the lead/lag relationships appear to be multidirectional among Japan, Singapore, and Taiwan, but between Hong Kong and Singapore, and between Hong Kong and Taiwan, they are unidirectional, with Hong Kong playing the dominant role in generating negative volatility shocks. In addition, the conditional ICAPM with asymmetric multivariate general autoregressive conditional heteroscedastic in mean (MGARCH(1,1)-M) structure is able to explain/predict on average 17.28% of the return variations in those markets. Therefore, this study provide a further evidence that the time-varying risk premium is a very strong candidate in explaining the predictable excess return puzzle [Lewis, K. K. (1994). Puzzles in international financial markets. NBER Working Paper No. 4951] since the risk premia founded in this article are not only statistically significant but also economically significant.     

Tumenjiang Delta,New Drive for Chinese Economy

District of Tumenjiang,or Tumen river area is described by Japanese Takeo Touma as strategic center of "Japan Sea Rim Economic Zone" for five economic regions (Japan the Far East region of Russia, North and South Korea, and the Northeast region of China).     

The Recent Development of Financial Markets in Vietnam

MOCT-MOST: Economic Policy in Transitional Economies -     

建筑工程质量监督及技术资料管理系统研究

首先对建筑工程质量监督及技术资料管理系统进行了简要介绍,接下来分析如何选择建筑工程质量监督及技术资料管理系统开发的方法,以及如何设计建筑工程质量监督及技术资料管理系统。     

非关税措施及其规制的制度经济学之维

制度经济学研究经济与制度之间的双向关系,将制度产生的成本、基本的人类价值取向、寻租等问题纳入研究范围。非关税措施作为一项制度,其产生的成本增加、基本人类价值取向和寻租问题可以从制度经济学的角度来进行思维与考察。制度经济学模型是把制度对经济的影响予以量化的计算公式。因此,制度经济学对制度的经济影响评估模型为WTO规制非关税措施提供了帮助。在WTO的规则制定阶段、贸易政策评审阶段以及争端解决阶段都可以引入制度的经济影响模型分析来规制非关税措施。     

Tumenjiang Delta,New Drive for Chinese Economy

District of Tumenjiang, or Tumen river areais described by Japanese Takeo Touma as strategic center of ＂Japan Sea Rim Economic Zone＂ for five economic regions （Japan the Far East region of Russia, North and South Korea, and the North- east region of China）. As the typical example of international regional cooperation, the idea of Tumenjiang area devel- opment has lasted for nearly 20 years with the fluctuations of international politics.     

大同塔山煤矿煤系高岭土资源评价与利用

文章介绍了塔山煤矿煤系中高岭土的赋存特征和化学成分特征并评价了其利用方向，对预期所能取得的经济效益和社会效益进行了探讨，认为该煤系高岭土资源储量丰富，当前有开发价值并能获得社会和经济效益。