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。

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Carry on the arrangement through the introduction bivariate distribution function to a pair of sector weight, thus determines a series of weights relatively important sector the order.

通过引入二元分布函数对一对区间数权重进行排序，从而确定一系列权重相对重要区间的次序。

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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。

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