从下到上的方法的难点在于可能在规则挖掘之前会很难确定战略战术需求，除非有额外可用的元数据和上下文。
The challenge in working bottom up is that it may be hard to map Strategic and Tactical requirements that were defined before the rule mining unless there is additional metadata and context available.
针对分布式系统中的数据挖掘问题，提出了一种新颖高效的分布式元挖掘方法。
Aiming at the problem of data mining in distributed system, a novel and effective meta-mining method is presented.
结果表明，面向有限元仿真结果的数据挖掘技术为塑性成形领域知识发现提供了一条有效的新途径。
The results show that the data mining technology oriented to FEM results provides an effectively novel method of knowledge acquisition in the field of plastic forming.
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