笔者分析了灰密的概率密度分布，并推导出盐密与灰密的联合概率密度函数。
This paper analyzes the probability density distribution of the non-soluble deposit density, and hence deduces a combined probability density distribution function.
该方法通过直接在可接受域上对性能的联合概率密度函数进行积分获得成品率的估计。
This method tries to integrate the joint probability density function on the acceptability region directly.
对各工况下的二维疲劳载荷，采用权系数的方法，合成并获得了多工况下的二维载荷联合概率密度函数。
Two dimensional fatigue loading under various working conditions is synthesized with weight coefficient method to obtain joint probability density function under multiple working conditions.
对各工况下的二维疲劳载荷，采用权系数的方法，合成并获得了多工况下的二维载荷联合概率密度函数。
Two dimensional fatigue loading under various working conditions is synthesized with weight coefficient method to obtain joint probability density function under multiple working conditions.
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