In reasoning process of product conceptual design, expression of knowledge of design problem is a pivotal step.
在产品概念设计的推理过程中，设计问题的知识表达是关键的第一步。
Rough Sets theory has great superiority in Data Preprocessing because of its particular expression of knowledge, as well as it makes an effective means of knowledge Discovery in Database.
粗糙集理论由于其独特的知识表示方法在数据预处理方面有着得天独厚的优势，同时也成为数据库中知识发现的有效手段。
The expression of knowledge by XML can be extensively applied to teaching so as to set up a new learning environment and adapt a cooperative new learning model.
基于XML的知识表示可以广泛地应用到教学中去，以构建新的学习环境，适应新的协作学习模式。
By using right expression of knowledge and fuzzy reasoning, this approach improves the efficiency and real-time capability of fault diagnosis and achieves a satisfied result in industrial practice.
同时采用合理的知识表达方式和模糊推理机制提高了诊断的求解效率与实时性，并在实践中取得了良好的效果。
By using right expression of knowledge and fuzzy reasoning, this approach improves the efficiency and real-time capability of fault diagnosis and achieves a satisfied result in industrial practice.
同时采用合理的知识表达方式和模糊推理机制提高了诊断的求解效率与实时性，并在实践中取得了良好的效果。
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