MINIMUM INFORMATION UPDATING WITH SPECIFIED MARGINALS IN PROBABILISTIC EXPERT SYSTEMS (2008)
A probability-updating method in probabilistic expert systems is considered in this paper based on the minimum discrimination information. Here, newly acquired information is taken as the latest true...
2 Department of Probability and Statistics, Peking University, (2007)
Zhi Geng, Guo-liang Tian, P. R. China
This paper is concerned with the statistical inference of a truncated Dirichlet distribution (TDD) arising in the general context of misclassied multinomial models (such as medical screening or...
Chen, Hua, Geng, Zhi, Zhou, Xiao-Hua
In this paper we first studied parameter identifiability in randomized clinical trials with noncompliance and missing outcomes. We showed that under certain conditions the parameters of interest were...
Chen, Hua, Geng, Zhi, Zhou, Xiao-Hua
In this paper we first studied parameter identifiability in randomized clinical trials with noncompliance and missing outcomes. We showed that under certain conditions the parameters of interest were...
Chen, Hua, Geng, Zhi, Zhou, Xiao-Hua
In this paper we first studied parameter identifiability in randomized clinical trials with noncompliance and missing outcomes. We showed that under certain conditions the parameters of interest were...
Chen, Hua, Geng, Zhi, Zhou, Xiao-Hua
In this paper we first studied parameter identifiability in randomized clinical trials with noncompliance and missing outcomes. We showed that under certain conditions the parameters of interest were...
INFERENCE PROCEDURES FOR THE SYMMETRY IN A CONTINGENCY TABLE (1988)
Several inference procedures are discussed for the partial symmetry and the complete symmetry in a two-dimensional contingency table. The inference procedures proposed in the present paper is firstly...
Collapsibility of distribution dependence
Zongming Ma, Xianchao Xie, Zhi Geng
Cox and Wermuth proposed that the partial derivative of the conditional distribution function of a random variable "Y" given another "X" is used for measuring association between two variables with...
Criteria for surrogate end points
Hua Chen, Zhi Geng, Jinzhu Jia
A surrogate end point is often used to evaluate the effects of treatments or exposures on the true end point in medical researches. Various criteria for the statistical surrogate, principal surrogate...
Acceleration of the EM algorithm using the vector epsilon algorithm
Mingfeng Wang, Masahiro Kuroda, Michio Sakakihara, Zhi Geng
The vector ε algorithm, The EM algorithm, The Louis’s EM algorithm, Acceleration of convergence,
Consecutive Collapsibility of Odds Ratios over an Ordinal Background Variable
Guo, Jianhua, Geng, Zhi, Fung, Wing-Kam
G. R. Ducharme and Y. Lepage (1986, J. Roy. Statist. Soc. Ser. B48, 197-205) presented the strong collapsibility of odds ratio in 2—2—K tables. However, the concept is not suitable for an ordinal...
Kuroda, Masahiro, Sakakihara, Michio, Geng, Zhi
In this paper, we discuss the MLEs for log-linear models with partially classified data. We propose to apply the Aitken [delta]2 method of Aitken [Aitken, A.C., 1926. On Bernoulli's numerical...
Factorization of posteriors and partial imputation algorithm for graphical models with missing data
In this paper, we discuss factorization of a posterior distribution and present a partial imputation algorithm for a graphical model with incomplete data. We use an ordinary graph to represent a...
Decomposition of search for v-structures in DAGs
Geng, Zhi, Wang, Chi, Zhao, Qiang
We show that the problem of searching for v-structures in a directed acyclic graph can be decomposed into searches in its decomposed subgraphs. This result simplifies the search for v-structures and...
Ma, Wen-Qing, Geng, Zhi, Hu, Yong-Hua
In this paper, we use directed acyclic graphs (DAGs) with temporal structure to describe models of nonignorable nonresponse mechanisms for binary outcomes in longitudinal studies, and we discuss...
Collapsibility for Directed Acyclic Graphs
Collapsibility means that the same statistical result of interest can be obtained before and after marginalization over some variables. In this paper, we discuss three kinds of collapsibility for...