【摘要】 通过对基于实例的推理技术、实例的检索策略及实例相似性的研究,提出了可应用于机械产品设计领域的多层次实例检索模型和基于位索引的检索算法。给出了实例检索模型的层次划分方法,分析了位索引的建立过程和通过相似度映射表来提高实例检索效率的原理,最后通过实例验证了该算法的简洁性和高效性。更多还原

【Abstract】 In view of the disadvantages of formerly retrieved model in feature extraction and retrieval efficiency,a multi-layer case retrieval model based on bitwise indexing was proposed,which selected the best matching case by describing case similarity comprehensively in multi-layer.A new retrieval algorithm based on bitwise indexing was introduced.The process of establishing dynamic index using bitwise operation and the principle of prestored similarity mapping list to enhance retrieval efficiency was analyzed. Finally,the conciseness and efficiency of this algorithm was proved by examples.更多还原