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With the explosive development of the Internet, there is the rapid proliferation of the online science-and-technology cooperation communities (OSTCC), which are playing an increasingly important role in the advances in science and the developments in technology. From another perspective, the basic function of an OSTCC is to provide the participants with knowledge services so as to solve intellectual problems in a collective manner. On the basis of a "collective intelligence" model of online communities as previously-developed by the authors, a computational framework to support OSTCC is investigated in this paper, which is developed upon the Web/Web 2 technologies as well as the knowledge portal. As the key enabling technology, the social tagging system that underlies the proposed framework is furthermore discussed.