在不确定分析中，当净现值期望值相对较低，需进一步了解项目经济效益发生在某一区间的可能性有多大，则应计算这个区间内所有可能取值的概率之和，即累积概率(cumulativeprobability)，用P(NPV≥0)表示。
根据各物质的环境暴露浓度和相应急性毒性值的累计概率分布曲线估计了各物质相对风险性的大小。
The relative risk of these chemicals was also investigated based on cumulative probability distribution curves, which were generated based on both exposure and acute toxicity data.
介绍了表征不确定性的概率密度函数和累计密度函数曲线。
To token both curve of uncertainty is recommend which Probability Density Function and Cumulative Density Function.
对红砂岩进行粒度分析，得出其平均粒径和概率累计曲线。
The average grain diameter and cumulative relative curve of red sandstone are obtained by the grain size analysis.
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