Lead fuzzy sets into the mechanical products design and set up a new evaluating method for its scheme. 将模糊数学理论引入机械设计中，建立一种新的产品设计方案评价方法。
A design feature-based method for scheme generation in conceptual design is presented, whose effectiveness is verified by an example. 随后给出基于设计特征的概念设计方案生成方法及方案评价方法，并用实例验证其有效性。
