Some practical problems allow certain degree error of classification, in order to solve the problems, this paper extended our model and put forward the degree rough set model based covering.
有一些实际问题是允许一定程度的分类误差的，为了解决这些问题，本文将基于覆盖的粗糙集模型作了相应的推广，提出了基于覆盖的程度粗糙集模型。
With the help of Analytical Hierarchy Process with Variable Precision Rough Set, an algorithm to evaluate significance degree of risk factors in IT project bidding was put forward.
变精度粗糙集模型允许有一定程度的错误分类率存在，利用这种特性可以有效消除投标风险信息系统中的数据噪声，提高风险要素评价的精度。
By employing function rough set and its generated rough integral, the concepts of generated law, interference law and interference degree of output system were proposed.
利用函数粗集和它生成的粗积分，给出输出系统的生成规律、干扰规律与干扰度等的概念。
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