软件构件技术的研究

本文从分析当前软件产业的现状及存在的问题入手,指出了用传统方法解决问题的弊端,最后提出了一种有效的解决方案-软件构件技术,通过从不同的角度对软件构件技术的论述,得出结论：软件构件是实现软件复用的关键因素,也是解决软件危机的有效途径。     

Successful operation of a cooperative SLR station of China and Argentina in San Juan

We introduced the observations and researches using a Satellite Laser Ranging (SLR) system with high precision, which was designed and made in China and installed in the Observatory of San Juan Uni- versity, Argentina, the capability of the system and the achievement of the cooperative procedure be- tween China and Argentina. The SLR station in San Juan, set up by China and Argentina, is quite sig- nificant for improving the distribution of SLR stations and enhancing the orbital coverage of the whole earth. Since the SLR system started to work in the Observatory of San Juan University in the beginning of 2006, the operation is rather good, and rich data with high precision have been obtained. Further plan of the cooperation for the near future is also presented.