...场参数视为随机变量，依据概率和统计理论严格建立湍流燃烧系统中变量的联合概率密度函数（Joint Probability Density Function）的输运方程‘㈨。
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joint probability density function ==> 结合确率密度関数 joint probability distribution function ==> 联合概率分布函数 ..
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modified joint probability density function 修正的联合概率密度函数
This method tries to integrate the joint probability density function on the acceptability region directly.
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。
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。
The results indicate that the initial deviations of the joint positions match normal probability density function limited in the range of double mean variance.
随机缺陷分析方法中假定结构每个节点的位置偏差符合二倍均方差范围内的正态概率密度函数是可以接受的。
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