The expressions of the molecular weight distribution function and the average degrees of polymerization have been derived, and four special cases were discussed.

求得了分子量分布函数和平均聚合度的解析表达式，并讨论了四种特殊情况。

youdao

When multiple outliers occur in linear regression model or the distribution of residuals is not normal, we can use residuals rank as weight function to get some resist estimator.

线性回归模型的误差项不服从正态分布或存在多个离群点时，可以将残差秩次的某些函数作为权重引入估计模型来减少离群点的不良影响。

youdao

An introduction is Made of the method of using the weight of probability density function of error distribution law to conduct anti-error estimation.

文中主要介绍了利用误差分布律概率密度函数定权来进行抗差估计的一种方法。

youdao