Mechanical product concept design is complex and ill-structured. A complex mechanical system can be hierarchically decomposed into some simple sub-systems, with each sub-system designed differently.
机械产品概念设计是一个复杂的、病态结构的问题，它需要多种知识和求解策略的支持。
This paper introduces the needs of customized life design on mechanical product and describes the concept and steps of customized life design.
介绍机械产品进行定制寿命设计的需要，阐述了定制寿命设计方法的概念及设计步骤。
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