This paper utilizes the maximum likelihood to estimate the parameters of the choice model 利用最大似然法，对模型的上下选择层的参数进行估计。
2.
The objective of this study is to develop a novel technique for preparing asymmetric mosaic membrane by introducing both the negative charged and the positive charged groups into the selective layer of interfacial polymerization ( ip ) 为此，本文将重点研究通过界面聚合方法，在超滤膜支撑体上复合很薄的选择层，并使其具有荷电镶嵌膜的结构和特征。
