Multiple imputation for analyzing 2×2 cross over design with missing data;

EM estimation for missing data in medical research;

Asymptotic behavior of semiparametric regression model under missing data;

Firstly,based on correlation analysis,five reference points which were most correlative with the data missing points were obtained,then the data of both reference points and data missing point in the stage were simulated and verified.

We get the estimation of parameters of three-parameter lognormal distribution ba sed on missing data.

In particular,with the non-ignorable missing data,how to fill the data to improve the estimation precision.

Analysis and comparison of methods dealing with missing data of incomplete information system;

In allusion to variation of methanol project scheme,the basic data of methanol production were re-determined and checked,calculation method concerning methanol production was discussed,the energy consume and cost for new/old schemes were contrasted and summarized.

The paper analyzed the present situation and the problems existed in the construction of informationization in China s manufacturing industries,pointed out that the poor quality of the basic data became the bottleneck of the construction of informationization in the manufacturing industries.