Besides, this article presents the hierarchical model for storage and retrieval of case, and analyzes the integrated reasoning mechanism and modification algorithm for case.

采用面向对象方法定义了实例的对象模型及实例存储、检索的层状结构模型，并对集成推理机制和实例的修改算法做了探讨。

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In allusion to insufficiency of design retrieval based on similarity, the Neural Network is introduced into design of case retrieval and a model based Neural Network is proposed.

针对基于相似度范例检索存在的不足，将神经网络引入设计检索的研究之中，提出了基于神经网络的设计检索模型。

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Then a retrieval model of introspective learning is given to decrease the time of case retrieval, which can vary with the number of cases in case base obviously.

自学习案例检索模型则缓解了案例检索时间随案例数目呈线性增长的问题。

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