To avoid the excessive subjectivity influenced by the conventional determination methods of weight factor, the rough set was introduced to the solution of the weight factor in the extenics evaluation.

为了避免传统的权值确定方法所带来的主观性影响，将粗糙集理论引入可拓权重系数的求解过程中，使权系数问题转化为属性重要度评价问题。

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Studying deeply on shear strength characteristics of rough cement face has an important meaning for precise determination of shear strength parameter and analysis on failure mechanics.

深入研究粗糙胶结面抗剪强度特性对准确确定其抗剪强度参数值及分析其破坏机理具有重要意义。

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Attribute reduction is one of the key problems in rough set theory, and determination of core attribute is the basis to solve the problem of attribute reduction.

属性约简是粗糙集理论研究的一个核心问题，而核属性的确定往往是决策表中属性约简的基础。

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"Google has said in many conferences that this number isn't accurate, that it's a rough signal but shouldn't make any determination about a site, " says Fishkin.

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