将信息获取能力分指标取数域延拓，求得相关对象关于灰类的综合聚类系数。

The number field continuation was adopted by information acquire ability sub index, and the gray comprehensive clustering coefficients of relative objects were also acquired.

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实验结果表明，这种实现能有效地对用户访问日志进行聚类，并能满足服务器预取机制在线分析的时间、空间要求。

Experimental results show that the implementation can cluster the user access logs effectively, and the temporal and special efficiency can meet the on-the-fly need of Web server pre-fetching.

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取以杂多酸为催化剂，一步法合成聚四亚甲基醚醇(PTMG)，对影响聚四亚甲基醚醇单程收率的各因素进行了讨论。

Polyoxytertramethylene (PTMG) is synthetized in one step using heteropoly acid as catalyst. We discussed the factors which influenced the yield of PTMG.

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