Aiming at the low level of automation of case retrieval in case-based design, the variant design used in case-based fixture design was studied in detail.
针对基于实例推理的设计方法实例修改自动化程度较低的情况，对夹具实例自动化修改中的变型设计过程进行了研究。
The approach to use case modeling can be considered a top-down approach for SOA design, where service operations are identified based on where they are needed.
用于用例建模的方法可以视为SOA设计的自顶向下方法，服务操作基于所需的场合进行标识。
At last, several key enabling technologies, namely product data management, case based design, design for cost, virtual design and collaborative design are discussed in detail.
论述了实现这个体系结构的几个关键技术：产品数据管理、基于实例的设计、面向成本的设计、虚拟设计。
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