ActiveRecord automatically adds features to model objects based on the contents of the associated table, such as an attribute for each column in the table.

ActiveRecord根据关联表的内容(如表中每列的一个属性)自动地向模型对象添加特性。

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At last, based on attribute certificate, a model is constructed to solve the authorization and access-control problem, to realize secure access-control in the electronic government.

最后使用此策略构造了一个基于属性证书的授权和访问控制模型，能够灵活方便地实现电子政务中的安全访问控制。

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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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