By means of the exclusive sum of products of a fault tree, the improved method USES the basic event parameters direct in the synthetic evaluation and makes the fault tree kinetic analysis more simple.

借助故障树的不交积之和，直接由底事件参量进行综合计算，将简化故障树的动态分析。

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So, the results of fault trend analysis are easier to be influenced. To avoid this effect, a new synthetic analysis curve to reflect the fault deterioration trend is presented.

为了减少这种影响，提出一种综合分析的反映发电机组故障恶化程度的趋势曲线。

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