Fault tree model is the graphical expression of connection of basic events which result in system fault, and used in qualitative and quantitative analysis of system fault model.
故障树模型是导致系统失效的基本事件之间逻辑关系的图形表示，应用于系统失效模型的定性和定量分析。
This is the theoretical expression for the resistivity, and it is in qualitative agreement with experiment.
这就是电阻率的理论表达式，它与实验定性地符合。
The modeling rules and concise expression methods for qualitative algebra equation were introduced.
提出了定性代数方程简明表达方法的实现及建模规则。
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