In this paper, variable precision rough set model based on set pair analysis is proposed by introducing a concept of relatively classified fault rate.
该文是在集对粗糙集模型的基础上，引入相对分类错误率的概念，提出了一种基于集对分析的变精度粗糙集模型。
SD rate variable fundamental in-tree modeling not only realizes standardization of modeling but also is beneficial to calculation of feedback loops and perspicuity of feedback analysis.
流率基本入树建模法不仅实现了规范化建模，而且有利于反馈环的计算和反馈性分析清晰化。
Theoretical formulas were established by overall analysis to the progressive rate springs with variable arm length, and their results were obtained by experiment test.
通过对变撑臂渐硬性钢板弹簧的全面研究，推导出理论计算公式；通过试验测试，得到了试验结果。
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