在基于知识的工程环境下，研制面向产品生命周期的协同设计系统框架。
We develop framework of collaborative design system for PLC under the KBE (Knowledge-Based Engineering) environment.
对支持产品设计决策的质量信息的特点进行了分析，按照质量因素将面向产品生命周期的质量信息进行了分类。
Based on analyzing the characteristics of quality information that supporting design decision, the paper firstly classifies quality information according to factors that affects product quality.
分布式计算机辅助设计技术是充分利用分布式计算技术、数据库技术、面向产品设计制造全生命周期，支持动态建模与产品性能设计的设计技术。
Distributed CAD is a technology which USES technology of distributed computing, database system, orienting the whole life circle of product design, manufacture and supporting dynamic model.
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