Based on attribute identification theory, the comprehensive evaluation model of variable weight for quality of existing R. C. structures is established to evaluate the durability of the structures.

根据属性识别理论，建立了既有钢筋混凝土构件质量综合评判的变权模型，对既有钢筋混凝土构件进行耐久性评估。

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The segmentation by taking production attribute utility as segmentation variable is based on causal variable rather than descriptive one.

以产品属性效用为细分变量是建立在因果关系变量而非描述性变量基础上的一种细分方法。

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In this paper, we propose a new attributes reduction algorithm based on the significance of attribute dependencies as heuristic information and add a certain variable precision.

粗糙集理论是一种新的数据挖掘算法，文章以属性依赖重要性作为启发信息提出了一种新的属性约简算法，且加入了一定的分类正确度。

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