文章采用自适应核密度估计和正交多项式拟合方法近似估算样本的概率密度函数,建立了基于自适应核密度估计、正交多项式拟合和扩展可靠性的全局灵敏度求解方法。文中在给出所提方法的思路和实现步骤后,采用数值和工程算例对所建立的方法与现有的基于有限混合密度估计、最大熵密度估计的方法进行了比较,结果表明:基于最大熵和基于正交多项式拟合的方法具有较好的计算稳定性。
Section 1 of the full paper briefs the probability density function,which can be estimated by the existing methods in Refs.4 and 5 and by the two new methods;in section 1,eq.(2),which is related to augmented reliability, is particularly important.Subsection 2.1 establishes the new adaptive kernel density approximation method; in subsection 2.1,eq.(8) can be used for estimating the probability density function.Subsection 2.2 establishes the new polynomial approximation method;in subsection 2.2,eq.(14) can be...