joint probability density function : 联合概率密度函数 joint probability distribution function : 联合概率分布函数 joint moment generating function : [大陆]联合矩母函数，[台湾]联合动差母函数 ..
This paper analyzes the probabilitydensitydistributionof thenon-soluble deposit density, and hence deduces a combined probability density distribution function.