2017
Том 69
№ 9

All Issues

Zhang Jiajia

Articles: 2
Article (English)

Admissibility of Estimated Regression Coefficients Under Generalized Balanced Loss

Luo J., Qiu H.-B., Zhang Jiajia

↓ Abstract

Ukr. Mat. Zh. - 2015. - 67, № 1. - pp. 128-134

There are some discussions concerning the admissibility of estimated regression coefficients under the balanced loss function in the general linear model. We study this issue for the generalized linear regression model. First, we propose a generalized weighted balance loss function for the generalized linear model. For the proposed loss function, we study sufficient and necessary conditions for the admissibility of the estimated regression coefficients in two interesting linear estimation classes.

Article (English)

On Nearly -Supplemented Subgroups of Finite Groups

Guo J., Miao L., Zhang Jiajia

↓ Abstract   |   Full text (.pdf)

Ukr. Mat. Zh. - 2014. - 66, № 1. - pp. 63–70

A subgroup H is called nearly -supplemented in a finite group G if there exists a normal subgroup K of G such that HKG and TK < HK for every maximal subgroup T of H. We obtain some new results on supersoluble groups and their formation by using nearly -supplemented subgroups and study the structure of finite groups.