Based on the quantity model, the traditional methods could not analyze the product disassembling in a conceptual design.
传统的方法基于定量模型，无法在概念设计阶段分析出产品的可拆卸性。
Results show that the conceptual design model of mechanical product based on polychromatic sets can be described and reasoned with formal method, and programmed easily.
研究表明，基于多色集合理论建立的机械产品概念设计模型易于形式化描述和推理，方便计算机编程。
The tolerancing process and its characteristics were studied based on the product conceptual structure design automation technology. A four layer product tolerance model was put forward.
在产品概念结构设计自动化技术基础上，研究了产品公差设计过程及其特点，提出了四层产品公差结构模型。
The model of machine product conceptual design under virtual environment already is not stay no longer stage of tradition's principle sign. But it should have audio-visual and sight.
虚拟环境下的机械产品概念设计模型已不再停留在传统的原理符号设计阶段，而应具有直观性和可视性。
The model of machine product conceptual design under virtual environment already is not stay no longer stage of tradition's principle sign. But it should have audio-visual and sight.
虚拟环境下的机械产品概念设计模型已不再停留在传统的原理符号设计阶段，而应具有直观性和可视性。
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