Attention and Executive Functions as Mediators of Attachment and Behavior Problems

The purpose of this study was to provide a more comprehensive understanding of the relation between early parent‐child interactions and subsequent behavior problems and how certain cognitive processes mediate this relation. Specifically, this study investigated whether attention, inhibition, and planning skills mediate the relation between attachment security and behavior problems. Data were collected as part of the National Institute of Child Health and Development‐Study of Early Child Care and Youth Development when children (N = 1004) were between 36 months and the third grade. Results from structural equation models indicated that sustained attention mediated the relation between disorganized attachment and social problems. Planning mediated the relation between disorganized attachment and subsequent thought problems, attention problems, and delinquent behavior. Avoidant, ambivalent, and disorganized attachment directly predicted several behavior problems. Implications for theory and future research are discussed.     

四川盆地雷口坡组层序岩相古地理

针对四川盆地各矿区雷口坡组地层划分方案不统一，且受早印支运动的影响，雷口坡组顶部岩溶带地层垮塌破坏，造成地层内幕划分及岩相古地理恢复困难的难题，以层序地层学理论与方法为指导，重新厘定了盆地内雷口坡组的地层划分方案，以四级层序为作图单元进行层序岩相古地理重建。高精度的层序岩相古地理研究表明，雷口坡期四川盆地处于局限–蒸发海环境，在川西北一带靠近松潘—甘孜海槽一带发育有台地边缘，台地内部颗粒滩和台地边缘颗粒滩构成了雷口坡组的勘探主体。岩相古地理的演化表明，雷口坡组沉积时期盆地底形发生了东倾向西倾“跷跷板”式的转换，在层序I 早期仍保持了早三叠世西高东低的地形格局，至层序III 沉积期东倾趋势消失，层序IVV 沉积时期盆地内隆凹格局略具雏形。伴随着构造挤压运动的加剧，从层序VI 开始盆地底形隆凹格局分异加剧，形成巨厚膏盐盆，膏盐盆沉积中心在层序VIX 沉积时期具有明显西移的趋势。     

唐宋书法观念研究

唐代、宋代的书法观念是中国古代封建社会书法观念的典型代表,二者之间又有颇为明显的异同之处。正如常人所说的＂唐书法＂就是说唐代书法对于字体规范、风格法度有着严密的内在要求,其实由于科举进仕的需要以及宋人文化素养的普通提升,宋代文人对＂法＂也有着自觉地遵循。同时,在宋代还大量出现了＂游与艺＂、＂以书为乐＂等更为轻松的书法观念。     

The estimation of treatment effect for the censored bivariate data under the univariate censoring

This paper establishes a nonparametric estimator for the treatment effect on censored bivariate data under unvariate censoring. This proposed estimator is based on the one from Lin and Ying(1993)'s nonparametric bivariate survival function estimator, which is itself a generalized version of Park and Park(1995)' quantile estimator. A Bahadur type representation of quantile functions were obtained from the marginal survival distribution estimator of Lin and Ying' model. The asymptotic property of this estimator is shown below and the simulation studies are also given     

美国等五国"华人三重性"的比较研究

20世纪90年代以来,对华侨、华人的研究涉及历史、政治、经济、文化、社会等众多领域,涌现了一批有重要学术价值的专著。其中,韩方明博士在其论著《华人与马来西亚现代化进程》中,以马来西亚为例阐释了“华人三重性”即中华性、本地性、国际性的基本内涵。他提出的“华人三重性”理论使笔者深受启发。他指出:“华人三重性是对海外华人本质特征的一个理论表述……在不同的国家会有不同的内容及表现形式,对此进行研究,可以揭示不同国家华人问题的共性和个性。”①而目前学术界多侧重对同一地域不同国家的华人进行比较研究,尚未有人将“华人三重…     

近五年陕西省中小学教师培训多元化需求分析调查及解决策略研究

通过对自2009年以来近五年我国中小学教师专业培训需求研究成果进行分析和整理,分别从培训需求政策、培训动机需求、课程需求、模式需求等方面进行分析,最后提出解决培训中出现的问题和策略,旨在为教育行政部门提供可借鉴的参考。     

Symmetrical Design of Experiment in Global Sensitivity Analysis Based on ANOVA High-dimensional Model Representation

This article reviews symmetrical global sensitivity analysis based on the analysis of variance of high-dimensional model representation. To overcome the computational difficulties and explore the use of symmetrical design of experiment (SDOE), two methods are presented. If the form of the objective function f is known, we use SDOE to estimate the symmetrical global sensitivity indices instead of Monte Carlo or quasi-Monte Carlo simulation. Otherwise, we use the observed values of the experiment to do symmetrical global sensitivity analysis. These methods are easy to implement and can reduce the computational cost. An example is given by symmetrical design of experiment.     

New recursive estimators of the time-average variance constant

Estimation of the time-average variance constant (TAVC) of a stationary process plays a fundamental role in statistical inference for the mean of a stochastic process. Wu (2009) proposed an efficient algorithm to recursively compute the TAVC with \(O(1)\) memory and computational complexity. In this paper, we propose two new recursive TAVC estimators that can compute TAVC estimate with \(O(1)\) computational complexity. One of them is uniformly better than Wu’s estimator in terms of asymptotic mean squared error (MSE) at a cost of slightly higher memory complexity. The other preserves the \(O(1)\) memory complexity and is better then Wu’s estimator in most situations. Moreover, the first estimator is nearly optimal in the sense that its asymptotic MSE is \(2^{10/3}3^{-2} \fallingdotseq 1.12\) times that of the optimal off-line TAVC estimator.     

考古学与未来:工业文明的忧虑

在从考古学角度对玛雅、复活节岛和良渚文明崩溃回顾的基础上,文章从"报酬递减"和"最省力"原理介绍了古代文明崩溃的机制,然后对现代工业文明的发展趋势表示了忧虑.文章认为,今天的地球只不过是一个放大了的玛雅低地和复活节岛.历史教训告诉我们,环境恶化总是文明崩溃的一个前提.面对当代工业文明所面临的人口激增、环境恶化和资源枯竭的严峻形势,我们应该提倡"知足最好"而非"越多越好",避免重蹈古代文明崩溃的覆辙.     

On Bartlett correction of empirical likelihood for regularly spaced spatial data

Bartlett correction constitutes one of the attractive features of empirical likelihood because it enables the construction of confidence regions for parameters with improved coverage probabilities. We study the Bartlett correction of spatial frequency domain empirical likelihood (SFDEL) based on general spectral estimating functions for regularly spaced spatial data. This general formulation can be applied to testing and estimation problems in spatial analysis, for example testing covariance isotropy, testing covariance separability as well as estimating the parameters of spatial covariance models. We show that the SFDEL is Bartlett correctable. In particular, the improvement in coverage accuracies of the Bartlett‐corrected confidence regions depends on the underlying spatial structures. The Canadian Journal of Statistics 47: 455–472; 2019 © 2019 Statistical Society of Canada