In this paper,the lower estimate on n——K width,n——G width and n——L width of some periodic convolution classes generated by special kernels and N functions in the L_(2π) space is studied.

In this paper,we studied the lower estimate on n-K width and n-G width of some periodic convolution classes generated by special kernels in Orlicz spaces.

Regression imputation under incomplete auxiliary information and its variance estimate;

In this peper, it is shown that combined uncertainties(or variance estimates) in indirect measurements have different number of degree of freedom to independent and dependent direct measured quantities.

For missing data,based on the unbiased estimation of the population quantity of the non-responser of the interest variables and the auxiliary variables,regression imputation using response probability and its variance estimate are formulated by resampling technologies such as Jackknife and Bootstrap.

A study of variance estimation of kalman filtering method;

A new method of variance estimation based on wavelet packet de-noising;

Dynamic compensation based on noise variance estimation and model reference for sensors

The differences in the stem density among different positions on the stem and among varied age groups were verified by dummy variable method on the basis of selecting the best estimation method through comparison.

Based on the introduction of methods for growth estimation,comparison and analysis of various estimation methods are made,and the problem existing in referenced literature No.

In this paper, the estimation method and the scope of the solution to the structural parameter in over-- distinguished problems have been discussed.