本文针对传统的离散化技术所造成的信息丢失问题，提出了利用直觉模糊粗糙集合理论来进行属性约简的方法。
The technology of attribute reduction based on the intuitionistic fuzzy rough set theory is described as to the problem of information loss in the process of discretization.
利用粗糙集合理论对控制量作了粗糙化，实现了控制系统的变精度控制。
Applying the rough set theory make the controlling quantity roughened, and realizes a variable precision control.
采用了模糊集合理论的隶属函数方法，利用模糊矩阵运算进行推定所需煤气量。
By taking the method of membership function in fuzzy set theory, the volume of coal gas was calculated by fuzzy matrix.
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