Conditional statistical inference and quantification of relevance

Summary. We argue that it can be fruitful to take a predictive view on notions such as the precision of a point estimator and the confidence of an interval estimator in frequentist inference. This predictive approach has implications for conditional inference, because it immediately allows a quantification of the concept of relevance for conditional inference. Conditioning on an ancillary statistic makes inference more relevant in this sense, provided that the ancillary is a precision index. Not all ancillary statistics satisfy this demand. We discuss the problem of choice between alternative ancillary statistics. The approach also has implications for the best choice of variance estimator, taking account of correlations with the squared error of estimation itself. The theory is illustrated by numerous examples, many of which are classical.     

Easy-to-construct confidence bands for comparing two simple linear regression lines

This paper shows how to construct confidence bands for the difference between two simple linear regression lines. These confidence bands provide directly the information on the magnitude of the difference between the regression lines over an interval of interest and, as a by-product, can be used as a formal test of the difference between the two regression lines. Various different shapes of confidence bands are illustrated, and particular attention is paid towards confidence bands whose construction only involves critical points from standard distributions so that they are consequently easy to construct.     

Empirical likelihood inference for the regression model of mean quality‐adjusted lifetime with censored data

The authors consider the empirical likelihood method for the regression model of mean quality‐adjusted lifetime with right censoring. They show that an empirical log‐likelihood ratio for the vector of the regression parameters is asymptotically a weighted sum of independent chi‐squared random variables. They adjust this empirical log‐likelihood ratio so that the limiting distribution is a standard chi‐square and construct corresponding confidence regions. Simulation studies lead them to conclude that empirical likelihood methods outperform the normal approximation methods in terms of coverage probability. They illustrate their methods with a data example from a breast cancer clinical trial study.     

A note on new confidence intervals for the difference between two proportions based on an Edgeworth expansion

Zhou and Qin [2004. New intervals for the difference between two independent binomial proportions. J. Statist. Plann. Inference 123, 97–115; 2005. A new confidence interval for the difference between two binomial proportions of paired data. J. Statist. Plann. Inference 128, 527–542] “new confidence intervals” for the difference between two treatment proportions exhibit a severe lack of invariance property that is a compelling reason not to use them.     

现代汉语领属范畴研究

领属范畴是现代汉语语法研究中一个重要的研究课题。对领属关系问题进行系统、详尽的探讨 ,不仅有利于描述和解释汉语领属范畴的独特表达方式 ,而且还有助于对外汉语教学和机器对自然语言的处理。以往人们对领属问题也有所研究 ,但由于理论方法的局限 ,只单纯注重从句法上进行分析。其实领属范畴除了句法还涉及客观世界、语义诸方面内容。采用认知语言理论 ,从认知角度进一步研究领属的语法特征 ,可以更好地探讨现代汉语领属范畴的本质。     

Revisiting the Disengagement Theory with Differentials in the Determinants of Life Satisfaction

This study proposes that differentials in the determinants of life satisfaction can be used to test if the elderly have a new equilibrium. One's global life satisfaction is taken as an indicator for one's inner world and for the elderly, global life satisfaction is assumed to be not influenced by life domains which indicate drastic social changes, because they are supposed to be disengaged from social activities. On the other hand, global life satisfaction for other adults is affected by life domains indicating social changes, because they are still tightly involved with social activities. The differentials in the determinants of global life satisfaction thus indicate that the elderly have a new equilibrium.A national survey on Taiwanese living conditions conducted by the Ministry of Interior, the Republic of China, in 1998 is used to test the above hypotheses. The analytical results show that the elderly have perceived drastic social changes. Moreover, they do have an equilibrium that is different from the other two age groups.     

How can we Define the Concept of Long Memory? An Econometric Survey

In this paper we discuss different aspects of long memory behavior and applicable parametric models. We discuss the confusion that can arise when the empirical autocorrelation function decreases in a hyperbolic way.     

ODP环境中全局安全系统的拓扑结构

ＯＤＰ环境中的全局安全系统是由各个安全域通过安全联接而成的，但是安全域之间的关系、全局安全系统的结构却是错综复杂的，组织和管理好全局安全系统是一个非常重要的问题。文中提出了全局安全系统的三种拓扑结构：网状拓扑、树状拓扑和综合拓扑，并根据安全政策和安全对象，讨论了各种拓扑的特点和构成条件。     

DISTRIBUTION-FREE CONFIDENCE PROCEDURE FOR UMBRELLA ORDERINGS

Responses in a one-factor experiment with A; ordered treatments follow an umbrella, ordering if they consist of two piecewise monotone segments, i.e. increasing and then decreasing, or the converse. This paper proposes a non-parametric distribution-free confidence procedure for umbrella orderings, the aim being to identify the treatments that correspond to the optimal effects. It uses a method that joins the seemingly unrelated theories of U-statistics and isotonic regression. A random confidence subset of the ordered treatments is constructed, such that it contains all the unknown peaks (optimal treatments) of an umbrella ordering with any prespecified confidence level. The paper demonstrates that the proposed confidence procedure is nonparametric distribution-free and, further, that the proposed procedure naturally implies a test for umbrella alternatives. Since the proposed confidence procedure is always more informative than tests for umbrella alternatives, it should be used in their place in practice. An example illustrates the proposed procedure.     

Eisenstein判别法的推广

论述了Eisenstein判别法的若干具有实用价值的推广形式,并把Eisenstein判别法推广到了整环上.