Toeplitz矩阵的性质及其应用

运用矩阵方法,研究了特殊的Toeplitz矩阵A和n阶幂零矩阵在相似变换下的广义逆,得到了Toeplitz矩阵的一些性质,并用这些性质刻画了幂零矩阵A在相似变换下的广义逆的表达形式.     

SPECIAL ISSUE： ONLINE LITERATURE IN CHINA： PRESENT SITUATION AND THEORETICAL REFLECTIONS Online Writing in the Course of Discourse Transformation： A Review of Ten Outstanding Online Novels of the Past Decade

中国当代文学阅读层面上的价值认同正在经受前所未有的挑战。特别是新世纪以来,新的写作群体、写作方式不断涌现,使固有的理论批评体系遭到撞击、被撕裂,从而导致理论批评不时出现失语现象。随着网络文学的迅猛发展,非主流文学在阅读与消费环节中的影响日益增强,这就使得上述问题转化成了新的矛盾——互相不能包容的阅读隔膜。十多年来,网络上产生了海量的小说文本,逐渐形成了二十多种类型;本文兼顾时间跨度和创作类型,遴选了十年中不同类型的十部佳作,并针对它们区别于纸质媒体的艺术审美和创作特点进行了述评。     

Assessing the Concept of the ‘Insecure‐Other’ Category in the Cassidy–Marvin Scheme: Changes Between 4 and 6 Years in the English and Romanian Adoptee Study

We set out to explore the meaning of the attachment categories in the Cassidy/Marvin strange situation procedure, as employed in the home, using data from a longitudinal study of children adopted into UK families up to the age of 42 months from Romanian institutions, and of adopted children without the experience of institutional care––both groups being assessed at 4 and 6 years of age. Inter‐rater reliability was found to be good. Security (meaning the use of the parent as a secure base and no negative behavior on reunion) was the modal categorical rating in both the institution‐reared and comparison groups, but the category of anomalous non‐normative behavior (meaning a lack of any ordered attachment behavior as covered by the standard ratings), previously labeled ‘insecure‐other’, was more common in the institution‐reared children. Because this was unassociated with the usual manifestations of insecurity (such as avoidance or resistance) and because it was largely evident in interactions with the stranger, it is concluded that the adjective ‘insecure’ was not appropriate. Although this ‘insecure‐other’ category was associated with disinhibited attachment as reported by parents (meaning a lack of differentiation among adults, a willingness to go off with strangers and a lack of checking back with parents in anxiety‐provoking situations), it did not prove to be a good index of disinhibited attachment because changes over time in the ‘insecure‐other’ category were not associated with changes in the rate of disinhibited attachment. Also, whereas the rate of ‘insecure‐other’ fell markedly in the institution‐reared group between 4 and 6 years of age, it rose in the comparison group, raising queries over its meaning.     

城镇化:乡镇政府职能转变的新背景论析

城镇化在推动中国经济社会发展过程中起着重要作用。实施城镇化战略,是解决我国三农问题的重要途径,是实现城乡经济社会统筹协调发展的必然要求,是加快工业化发展的必然结果,是建设社会主义新农村的重要选择。我国现有的城镇化发展水平、经济体制改革的目标、城镇化的成本与效益等因素是中国特色城镇化道路的选择依据。在城镇化进程中,乡镇政府要转变计划经济体制中依靠行政命令自上而下搞城镇化建设的做法,依靠经济和法律手段,科学干预、合理引导,从而不断加快城镇化进程。城镇化的发展,为乡镇政府职能转变提供了一个全新的背景。     

从旗袍的流行变化看中国服装的现代性转型

旗袍是由满族的袍服演变过来,一开始具有浓厚封建色彩,在民国时期加入流行元素和采用国外先进裁剪和加工方式后,成为流行全国的国服。而就是在旗袍的逐渐流行变化的这段时间内,中国服装业初步完成了现代性的转型,而旗袍正是这场转型的完美典范。透过旗袍的流行,我们不难发现中国服装的这场现代性转型的意义所在。     

中国国库统计改革

国库统计是政府对国民经济进行宏观管理，特别是制定相互协调的财政政策和货币金融政策的基本依据。近年来，随着人民银行体制与财政体制改革的深化，国库改革问题开始受到学术界与实际部门的重视，国库统计改革也相应被关注。而对中国国库统计问题的思考，必须置于转轨经济制度变革的背景下进行。从这个意义上讲，厘清国库统计制度的变迁，准确把握所面临的新的挑战，冷静审视国库统计的地位，并进一步明确国库统计改革的基本取向就显得非常迫切而且十分重要。     

Posterior consistency of logistic Gaussian process priors in density estimation

We establish weak and strong posterior consistency of Gaussian process priors studied by Lenk [1988. The logistic normal distribution for Bayesian, nonparametric, predictive densities. J. Amer. Statist. Assoc. 83 (402), 509–516] for density estimation. Weak consistency is related to the support of a Gaussian process in the sup-norm topology which is explicitly identified for many covariance kernels. In fact we show that this support is the space of all continuous functions when the usual covariance kernels are chosen and an appropriate prior is used on the smoothing parameters of the covariance kernel. We then show that a large class of Gaussian process priors achieve weak as well as strong posterior consistency (under some regularity conditions) at true densities that are either continuous or piecewise continuous.     

Inferences on correlation coefficients: One-sample,independent and correlated cases

This article concerns inference on the correlation coefficients of a multivariate normal distribution. Inferential procedures based on the concepts of generalized variables (GVs) and generalized p$p$-values are proposed for elements of a correlation matrix. For the simple correlation coefficient, the merits of the generalized confidence limits and other approximate methods are evaluated using a numerical study. The study indicates that the proposed generalized confidence limits are uniformly most accurate even for samples as small as three. The results are extended for comparing two independent correlations, overlapping and non-overlapping dependent correlations. For each problem, the properties of the GV approach and other asymptotic methods are evaluated using Monte Carlo simulation. The GV approach produces satisfactory results for all the problems considered. The methods are illustrated using a few practical examples.     

我国部门间收入流量测算及特征分析

摘　　要:国民收入在部门间的分配流量及其比例,是宏观经济研究的重要内容。研究收入分配问题,不能不考虑部门间在收入分配中的相互关系,但我国目前官方只公布收入与部门交叉数据,还缺乏部门与部门交叉流量数据,且有3年的滞后期。本文采用了一种称为“双矩阵RAS法”的方法,首先利用官方公布的2003年收入与部门交叉数据对2005年收入与部门数据进行了测算,进而用“收入转移法”测算了2005年部门与部门交叉流量数据。分析了1997年至2005年我国部门间收入流量状况,总结出近年来我国部门间收入流量变化的六大特征,并提出了相应的建议。     

Statistical Inference Based on Pooled Data: A Moment-Based Estimating Equation Approach

We consider statistical inference on parameters of a distribution when only pooled data are observed. A moment-based estimating equation approach is proposed to deal with situations where likelihood functions based on pooled data are difficult to work with. We outline the method to obtain estimates and test statistics of the parameters of interest in the general setting. We demonstrate the approach on the family of distributions generated by the Box-Cox transformation model, and, in the process, construct tests for goodness of fit based on the pooled data.