中文摘要：

为使多个学习网站共享学习资源，提出远程协同学习网站联盟的概念．在嵌套式知识空间模型的基础上，提出共享知识空间模型，对联盟内各网站的学习资料进行统一组织，形成共享知识空间．运用该模型，实现了协同学习网站联盟．系统运行结果表明：该模型以共享知识域为主干，较好地解决了“学习者容易迷失方向”的问题；联盟内各网站的学习者能通过定制知识空间透明地访问联盟内其他网站的资源，从而实现了资源共享，同时也满足了各网站的个性化需求．

英文摘要：

In order to let learners share learning data in muhi-websites, web-based collaborative learning coalition is defined based on nested knowledge space model. The shared knowledge space model is presented by which the learning data in multi-websites can be organized together and formed the shared knowledge space. According to the model the web-based collaborative learning coalition is implemented. The experiments show that the learners of the websites in the coalition can access transparently the data stored in the other websites in the coalition by the nested Customized knowledge space in the website they belong to, so the data in multi-websites in the coalition is shared and the different needs for learning data are met.