外商直接投资的技术溢出效应研究——基于39个行业的实证研究

本文利用我国39个行业的最新数据研究了FDI的技术溢出效应,得出了与以往研究不同的结论:第一,国内投资是影响经济增长的主要因素。中国市场化改革的结果,使得国内投资成为影响我国经济增长的第一位的最重要的因素。第二,FDI的技术溢出效应为负。说明在很多行业中,FDI并没有带来正的技术溢出,外资主要是利用了中国的市场规模,廉价的劳动力资源,或者通过竞争效应挤垮了内资企业。第三、劳动力对我国经济增长的影响并不显著。     

高邮凹陷南断阶沉积成岩对储层产能控制评价

影响低渗透储层产能的因素众多而复杂,因此,正确分析和评价这些因素对于低渗透储层开发有重要的指导 意义。排除工程因素影响,从地质因素考虑,重点分析和评价沉积与成岩作用对产能的影响,并利用恒速压汞和核磁 共振特殊实验数据对其机理进行剖析。研究表明,高邮凹陷南断阶储层产能主要受后期成岩作用控制,局部小范围 内,成岩环境相同的受沉积作用控制,究其机理,南断阶储层主要受压实、胶结、溶蚀等成岩作用形成不同的微观孔隙 结构,导致南断阶储层产能显著的差异性。     

Generalized additive modelling of sample extremes

Summary.  We describe smooth non-stationary generalized additive modelling for sample extremes, in which spline smoothers are incorporated into models for exceedances over high thresholds. Fitting is by maximum penalized likelihood estimation, with uncertainty assessed by using differences of deviances and bootstrap simulation. The approach is illustrated by using data on extreme winter temperatures in the Swiss Alps, analysis of which shows strong influence of the north Atlantic oscillation. Benefits of the new approach are flexible and appropriate modelling of extremes, more realistic assessment of estimation uncertainty and the accommodation of complex dependence patterns.     

论《庄子》"小大之辩"的审美意义

庄子笔下塑造了一系列"极大"与"极小"的事物."大自为大,以小衬大"带来了壮美的审美效果;"小中有大,大处有小"彰显了庄子宏阔的宇宙意识;<庄子>中的"小大之辩"具有超乎寻常的美学意义.     

Mixed models for data from thorough QT studies: part 1. assessment of marginal QT prolongation

We investigate mixed models for repeated measures data from cross-over studies in general, but in particular for data from thorough QT studies. We extend both the conventional random effects model and the saturated covariance model for univariate cross-over data to repeated measures cross-over (RMC) data; the resulting models we call the RMC model and Saturated model, respectively. Furthermore, we consider a random effects model for repeated measures cross-over data previously proposed in the literature. We assess the standard errors of point estimates and the coverage properties of confidence intervals for treatment contrasts under the various models. Our findings suggest: (i) Point estimates of treatment contrasts from all models considered are similar; (ii) Confidence intervals for treatment contrasts under the random effects model previously proposed in the literature do not have adequate coverage properties; the model therefore cannot be recommended for analysis of marginal QT prolongation; (iii) The RMC model and the Saturated model have similar precision and coverage properties; both models are suitable for assessment of marginal QT prolongation; and (iv) The Akaike Information Criterion (AIC) is not a reliable criterion for selecting a covariance model for RMC data in the following sense: the model with the smallest AIC is not necessarily associated with the highest precision for the treatment contrasts, even if the model with the smallest AIC value is also the most parsimonious model.     

赛前400m跑训练的探讨

本文依据训练学理论结合学生的生理特点,根据多年的训练实践,使运动员能在赛前达到超量恢复,处于最佳的赛前竞技状态。     

the Block–Block Bootstrap: Improved Asymptotic Refinements

The asymptotic refinements attributable to the block bootstrap for time series are not as large as those of the nonparametric iid bootstrap or the parametric bootstrap. One reason is that the independence between the blocks in the block bootstrap sample does not mimic the dependence structure of the original sample. This is the join‐point problem. In this paper, we propose a method of solving this problem. The idea is not to alter the block bootstrap. Instead, we alter the original sample statistics to which the block bootstrap is applied. We introduce block statistics that possess join‐point features that are similar to those of the block bootstrap versions of these statistics. We refer to the application of the block bootstrap to block statistics as the block–block bootstrap. The asymptotic refinements of the block–block bootstrap are shown to be greater than those obtained with the block bootstrap and close to those obtained with the nonparametric iid bootstrap and parametric bootstrap.     

论西方哲学中身体意识的觉醒及其推进

身体问题在20世纪西方哲学尤其是欧陆后现代哲学领域成为一个不容回避的焦点课题。而从柏拉图—奥古斯丁—笛卡尔路线之虚假的、邪恶的、无知的身体到现象学传统的功能性、形式化、基源性身体,再到后现代理论的物质性、生产性和欲望化的身体,身体意识的觉醒及其推进经历了一个由隐而显、由虚而实,从形式到内容、从边缘到中心的漫长过程。对这一过程的考察,不仅显示出身体问题在当代的崛起与凸显并非是孤立的、断裂的、一蹴而就的,而且展现了它所蕴含的巨大的可能性意义以及更为重要的理论界限。