最后，研究了基于特征矩阵的规则提取方法。

At last, it studies the rule extraction based on feature matrix.

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通过ACIS提取几何模型信息，建立制造特征库与采用基于规则的方法实现对制造特征的识别与重构。

Geometric model was extracted through ACIS, manufacturing feature was recognized reconstructed through establishment of manufacturing feature library and using of Rule-based method.

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充分考虑了可辨识矩阵的特性，提出一种基于类别特征矩阵的决策规则提取算法。

An extracting rules algorithm based on class feature matrix is presented, which has made use of the characteristic of discernibility matrix.

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