分布式对象技术在电信网管系统中的应用

随着电信网络的迅速发展,开放、高效、可扩展的电信网管系统成为当前电信网络管理的迫切需求.分布式网络管理成为电信网络管理的主要发展方向.分布式对象技术是对象技术在分布式领域的发展分支,对系统结构开放、分布式处理及软件复用提供了较好的支持.基于分布式对象技术设计的分布式电信网管系统适应当前网管需求,能够解决目前网络系统所面临的问题,具有较大应用价值.      

Going to Alpha Centauri B and setting up a Radio Bridge

How to exploit the Sun as a gravitational lens has been studied extensively during the last 20 years, especially by this author (Refs. 1, 2, 3, 4, 5, 6 and 7). In essence, a spacecraft dubbed FOCAL (an acronym for “Fast Outgoing Cyclopean Astronomical Lens”) should be launched in the direction of the sky opposite to the area of the sky we wish to see highly magnified both at radio and other frequencies. After FOCAL reached the minimal focal distance of 550 AU from the Sun, highly magnified radio images of celestial objects located on the opposite side of the Sun will automatically be produced. In this paper we apply the FOCAL mission concept to the goal of exploring the neighborhood of the Alpha Centauri B star, where the nearest exoplanet to the Solar system was recently discovered. We suggest that: