Since the characteristics of members is not true, the membership of virtual community is fuzzy, the characteristics of its association structure is unknown, two division algorithms of the virtual community associations division on space and time are presented. The relations between members and the interaction between communities are also presented at last. Comparative law based on common informarion and D function is applied to analyze the two division of societies, with the similarities and diversity to evaluate the virtual community of societies. Experimental results show that the different standards will affect the final structure of societies, and the societies is not absolutely in complete isolation from one another, but in association with overlapping.%针对虚拟社区中成员身份不真实、成员之间关系模糊、社团结构未知的特点,提出基于空间和时间对虚拟社区进行社团划分的两种算法,最终在线了社团内部成员之间的交互关系和社团之间的关联关系.然后利用共同信息比较法和D函数比较法分析了两种划分下的社团结构,并利用其相似性和相异性对虚拟社区中的社团进行了评价.实验结果表明,不同的划分标准会影响到最终的社团结构,且划分得到的社团之间不是绝对的彼此独立,而是具有重叠关联性.
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