从赵均刻本编目体例探窥《玉台新咏》古本之遗

本文对《玉台新咏》赵均刻本的编目实况进行细致考察,发现其卷首目录的编辑体例包括[作者名＋诗题或诗类名＋总篇数]和[作者名＋总篇数]两种格式,前者属于中古时期习用的体例,具有相当明显的时代性;其正文编目体例包括“题附辞后”和“题置辞前”两种格式,其中“题附辞后”的编目格式以及双重编目格式并存一书的现象至唐以后已属罕见。较之五云溪馆本和冯班抄本,赵均刻本更多的保留了徐陵旧本原始痕迹,当为目前最可靠的覆宋本。     

军队在"罗马化"过程中的作用

罗马军队是传播罗马文明的重要载体,对推动行省和边界地区的罗马化起到了直接或间接的作用。在此过程中,军队需求成为刺激行省地区经济发展和繁荣的一个重要因素,也是行省和蛮族士兵罗马化的一个重要媒介。在城市化运动中,罗马军队发挥了重要作用。     

现代信息查询领域知识体系探讨

在现代网络环境下,传统的文献检索范围已迅速拓展到现代信息查询领域,作为大学信息教育的课程——《文献检索与利用》,其知识体系面临淘汰陈旧知识、更新内容、体系结构优化重组的课题。本文针对这一目标,对现代信息查询领域知识体系作了初步的探讨。     

Improving variance function estimation in semiparametric longitudinal data analysis

We propose an efficient and robust method for variance function estimation in semiparametric longitudinal data analysis. The method utilizes a local log‐linear approximation for the variance function and adopts a generalized estimating equation approach to account for within subject correlations. We show theoretically and empirically that our method outperforms estimators using working independence that ignores the correlations. The Canadian Journal of Statistics 39: 656–670; 2011. © 2011 Statistical Society of Canada     

Threshold Estimation for Stochastic Processes with Small Noise

Consider a process satisfying a stochastic differential equation with unknown drift parameter, and suppose that discrete observations are given. It is known that a simple least squares estimator (LSE) can be consistent but numerically unstable in the sense of large standard deviations under finite samples when the noise process has jumps. We propose a filter to cut large shocks from data and construct the same LSE from data selected by the filter. The proposed estimator can be asymptotically equivalent to the usual LSE, whose asymptotic distribution strongly depends on the noise process. However, in numerical study, it looked asymptotically normal in an example where filter was chosen suitably, and the noise was a Lévy process. We will try to justify this phenomenon mathematically, under certain restricted assumptions.     

YAG:RE3+(RE=Eu,Tb)的制备及发光特性研究

利用柠檬酸-凝胶方法,以Y2O3,Eu2O3,Tb4O7和Al(NO3)3·9H2O作为初始原料,柠檬酸作为配位剂,成功制备出了Y3Al5O12:Eu3+(Tb3+)发光材料,其烧结温度为1?000℃,时间4?h.通过X射线衍射测试,表征Y3Al5O12为单相;计算其晶胞参数,发现晶胞体积v随着pH值的增大而增大.对Y3Al5O12:Eu3+(Tb3+)系列样品在紫外光谱区域和真空紫外光谱区域的发光性能进行了研究,结果表明:在真空紫外光谱区域激发下,Eu3+(Tb3+)的猝灭浓度比在紫外光谱区域激发下的低.     

精神分裂分析：解析资本主义的新视角——读《反俄狄浦斯：资本主义与精神分裂症》

在《反俄狄浦斯：资本主义与精神分裂症》中，法国当代哲学家吉莱斯·德勒兹与利克斯·瓜塔里认为，弗洛伊德的俄狄浦斯情结是人们心中的欲望源泉，又是资本主义统治的基础。因此，为了使人们能够挣脱资本主义，欲望本能需转向为欲望机器。通过精神分裂分析，他们提出了精神分裂症患者才是“去俄狄浦斯化”的革命代理人，这与马克思分析资本主义造就自己掘墓人的思想如出一辙。     

First‐order bias correction for fractionally integrated time series

Most of the long memory estimators for stationary fractionally integrated time series models are known to experience non‐negligible bias in small and finite samples. Simple moment estimators are also vulnerable to such bias, but can easily be corrected. In this article, the authors propose bias reduction methods for a lag‐one sample autocorrelation‐based moment estimator. In order to reduce the bias of the moment estimator, the authors explicitly obtain the exact bias of lag‐one sample autocorrelation up to the order n⁻¹. An example where the exact first‐order bias can be noticeably more accurate than its asymptotic counterpart, even for large samples, is presented. The authors show via a simulation study that the proposed methods are promising and effective in reducing the bias of the moment estimator with minimal variance inflation. The proposed methods are applied to the northern hemisphere data. The Canadian Journal of Statistics 37: 476–493; 2009 © 2009 Statistical Society of Canada