For the storage of revised cases, rules are presented for the self-improvement of case library, that is to reserve high standardized cases and disuse low standardized ones.

• 对修正后实例的存储,提出了以模具标准化程度高低为原则对实例库进行“自学习”,即对能实现同样设计目标的实例,淘汰标准化程度低的实例而保留标准化程度高的实例,以避免实例的重复出现。