A so-called zerotrees-wavelet-coefficient method for the propose of the ferrogram image coding and an expert system model for ferrographic analysis and failure diagnosis are also presented.

• 在知识表示的属性理论的基础上，提出并建立了基于数据库的铁 谱分析故障诊断知识存储模型与故障诊断专家子系统的建立方法。