On the basis of coal practice, grey system theory is used and classified index system is set up.
根据煤矿生产实际，应用灰色系统理论建立了井下劳动环境聚类指标体系。
The damage diagnosis method based on vibration testing can be further classified as a direct system identification method, a damage index method and a finite element model modification method.
其中基于振动测试的损伤诊断法可进一步分为直接的系统识别方法、损伤指标法和有限元模型修正法。
Credit index system was constructed with being classified into static index and dynamic index.
在提出静态指标和动态指标分类法的基础上，构建了信用评价指标体系。
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