ObjectiveTo study the risk factors of gallbladder stone recurrence after percutaneous cholecystolithotomy(PCCL).
目的探讨经皮胆囊碎石术（PCCL）后结石复发危险因素。
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.
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.
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。
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