同样，ActiveRecord的关联和校验对于数据库的约束定义来说也是一种冗余。
As well, ActiveRecord associations and validations are redundant specifications of database constraints.
从系统有效度和系统代价出发提出了一种多传感器冗余系统的优化模型和满足有效度约束的最小代价准则。
An optimization model for the redundant multi sensor system and the criteria with a minimum cost which fulfill the systems availability constraint are presented.
采用剪枝技术来消除构造过程中存在的冗余内涵比较，给出约束概念格渐进式构造算法PCCL。
An incremental construction algorithm named PCCL of the constrained concept lattice was presented by using pruning technology that eliminated the redundant information in the construction process.
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