从关联理论角度探讨话语标记语oh的语用功能

关联理论为探讨语言形式与话语理解之间的关系提供了理论框架。在该理论的基础上,从认知—语用的角度分析总结了话语标记语oh在言语交际中的六个语用功能:信息修正标记、话语延缓标记、话轮转换标记、信息追加标记、认可旧信息标记和获得新信息标记,进一步揭示了言语交际的动态性,以期帮助人们更好地生成理解话语。     

A Comparison of Hierarchical Methods for Clustering Functional Data

Functional data analysis (FDA)—the analysis of data that can be considered a set of observed continuous functions—is an increasingly common class of statistical analysis. One of the most widely used FDA methods is the cluster analysis of functional data; however, little work has been done to compare the performance of clustering methods on functional data. In this article, a simulation study compares the performance of four major hierarchical methods for clustering functional data. The simulated data varied in three ways: the nature of the signal functions (periodic, non periodic, or mixed), the amount of noise added to the signal functions, and the pattern of the true cluster sizes. The Rand index was used to compare the performance of each clustering method. As a secondary goal, clustering methods were also compared when the number of clusters has been misspecified. To illustrate the results, a real set of functional data was clustered where the true clustering structure is believed to be known. Comparing the clustering methods for the real data set confirmed the findings of the simulation. This study yields concrete suggestions to future researchers to determine the best method for clustering their functional data.     

中国经济发展中的深层次问题

中国经济正面临何去何从的方向性问题:是进一步深化改革,抓大放小,无为而治,让市场发挥越来越多的作用;还是国进民退,让政府主导经济,发挥更多的作用?答案无疑是前者。基于以上判断,中国经济的长期深层次根本问题在于:深层次制度障碍未破除,深层次市场化改革滞后,政府、社会与市场的治理边界界定不清晰、不合理。这就导致了三重三轻的不科学发展观:重政府轻市场、重国富轻民富、重发展轻服务。要解决这些深层次问题,下一步改革的关键在于深入推进政府职能的两个根本性转变:第一,从发展型政府向服务型政府转变;第二,从全能型政府向有限型政府转变。     

Elliptically contoured model and factorization of wllks1 A

In a series of papers, Kshirsagar (1964, 1971) and McHenry and Kshirsagar (1977), factorize Wilks' A into a number of factors and find the independent null multivariate beta densities of these factors. These factors are the likelihood ratio test criteria for testing the goodness of fit of certain assigned discriminant functions or canonical variables either in the space of independent or dependent variables. Essentially the factors of Wilks' A are the factors of certain multivariate beta distributed matrix or its determinant. The Bartlett decomposition of the underlying multivariate beta distribution into independent factors determines the distribution of these factors. The present paper generalizes Kshirsagar's (1971) normal theory to the elliptically contoured model, and shows that his results are null robust for the elliptically contoured model.     

论意志在认识中的作用

意志在认识中具有多方面的作用 ,其中最基本的是 :定向作用、控制作用和调节作用。意志在认识中的能动作用是在实践中产生和发展的。主体意志的变化与其所处的外部社会文化环境的变化并非绝对同步的。主体意志具有自身的相对独立性。单独拓展对主体意志认识中的作用的研究 ,具有很大的必要性。     

Extreme statistics from the cosine distribution

The cosine distribution serves as a very good teaching example for which exact moment properties of extreme order statistics can be expressed in terms of elementary functions. This article presents the limiting joint distribution of the extreme order statistics for the cosine distribution. It is shown that burrows'(1986) result is a special case of the result presented in this article.     

Moments for a ratio of correlated gamma variates

This paper considers the finite integral moments for the ratio, R = X/Y, where X and Y re correlated gamma distributed variables. An analytical and numerical comparison is given for two classes of underlying bivariate gamma distributions. It is shown that the two bivariate gamma structures provide indentical experessions for the mth unadjussted moment, E(R^m), if and only if either of the following conditions hold : 1) X and Y are uncorrelated of 2) m=1. A numerical evaluation is performed to determine the extent that the two methods differ whenever the variables are correlated     

牵动思维与表述功能的现代诗歌欧化语言

从外国诗歌语言中借鉴而来的欧化语言贯穿了整个中国现代诗歌的发展过程。这主要表现为欧化词语的介入、语法与句法的更新以及语言表述方式与诗歌功能的拓展三个层面。尽管其命运坎坷，但已经内化为现代诗歌不可离析的一部分。     

Distribution of linear combination of exponential variates

The exact distribution of a linear combination of n independent negative exponential random variables, when the coefficients of the linear combination are distinct and positive quantities, is well-known. This paper extends the above result to the general case, namely when the coefficients are arbitrary real numbers, positive or negative, distinct or coincident.     

Bayesian variable selection with spherically symmetric priors

We propose that Bayesian variable selection for linear parametrizations with Gaussian iid likelihoods should be based on the spherical symmetry of the diagonalized parameter space. Our r-prior results in closed forms for the evidence for four examples, including the hyper-g prior and the Zellner–Siow prior, which are shown to be special cases. Scenarios of a single-variable dispersion parameter and of fixed dispersion are studied, and asymptotic forms comparable to the traditional information criteria are derived. A simulation exercise shows that model comparison based on our r-prior gives good results comparable to or better than current model comparison schemes.