Almost Sure Convergence of Weighted Sums for Negatively Associated Random Variables

In this article, let {X₁, …, X_n} be a sequence of negatively associated random variables and {a_ni, 1 ? i ? n, n ? 1} be a triangular array of constants. Several almost sure convergence theorems for the weighted sums ∑ⁿ_{i = 1}a_niX_i are established.     

基于区间灰数与离散灰数双重异构序列的预测建模方法研究

系统变化的复杂性导致了系统行为数据的不确定性与异构性,面向多源信息的数据集结导致了表征系统变化规律的灰色异构时序数据的产生。对面向区间灰数与离散灰数的双重异构数据序列预测建模方法展开研究,通过对区间灰数均匀分割处理,得到与离散灰数灰元数量相等的次级区间灰数,进而实现了灰色异构数据的"同质化"转换;在此基础上构建了面向异构数据序列的灰色预测模型,并应用该模型实现了大桥沉降量的有效模拟与准确预测。研究成果对拓展灰色预测模型应用范围具有积极意义。     

Statistical estimation of quadratic Rényi entropy for a stationary m-dependent sequence

The Rényi entropy is a generalisation of the Shannon entropy and is widely used in mathematical statistics and applied sciences for quantifying the uncertainty in a probability distribution. We consider estimation of the quadratic Rényi entropy and related functionals for the marginal distribution of a stationary m-dependent sequence. The U-statistic estimators under study are based on the number of ε-close vector observations in the corresponding sample. A variety of asymptotic properties for these estimators are obtained (e.g. consistency, asymptotic normality, and Poisson convergence). The results can be used in diverse statistical and computer science problems whenever the conventional independence assumption is too strong (e.g. ε-keys in time series databases and distribution identification problems for dependent samples).     

人民币资本项目开放的理论探讨

随着合格境外机构投资者制度(QFII)的推出,我国正在逐步放松对资本项目的管制,加大资本项目开放的力度。但在开放过程中,有三个问题显得尤为重要:一是如何认识在存在着较多风险的情况下,我国加快资本项目开放的必然性;二是如何选择开放次序,从而使开放过程风险可控有序地推进;三是如何分析和防范开放过程中的各类风险,以保证宏观经济的稳定。本文就这些问题进行了探讨。     

清代世爵世职承袭制度的几个问题

清代的世职承袭自天聪以降,一直存在着世袭罔替和按次承袭两种选择方式,清初决定两种方式选择的主要依据是天聪五年的功臣袭职例,这也一定程度导致了清初按次承袭的混乱,顺治年间虽有统一规定,但承袭方式不同的特色仍得以延续.承袭人的择取不似承袭方式混乱,却也经过了前后细微的变化.     

Performance Effects Related to the Sequence of Integration of Healthcare Technologies

There is a natural order to most events in life: Everything from learning to read to DNA sequences in molecular biology follows some predetermined, structured methodology that has been refined to yield improved results. Likewise, it would seem that firms could benefit by adopting and implementing technologies in some logical way so as to increase their overall performance. In this study of 555 hospitals, we investigate the order in which medical technologies are transformed into information technologies through a process of converting them from stand‐alone technologies to interoperable, integrated information systems and whether certain configurations of sequences of integration yield additional value. We find that sequence does matter and that hospitals that integrated foundational technologies first—which in this case are known to be more complex—tend to perform better. Theoretical and practical implications of this finding and others are discussed.     

谈水书的古文字笔画元素

文章通过对水族文字中的多点现象、三角符号、弧形笔画与圆形符号等古文字的笔画元素,与古汉字类似的笔画进行比较研究,阐明水族文字是古代文字的遗存,既与古代汉字观念有某些联系,又有其独特的造字视角。     

《朗读者》:凿向多元叙述的利斧——小说叙事艺术探微

德国作家本哈德·施林克的《朗读者》,以精致、独到的小说艺术赢得一致好评。其在文本叙事方面的主要特征是:镶嵌并置的多重故事叙事,时间颠倒的时序倒置,隐喻与深层结构下的宗教话语言说;这些策略的运用,将小说的叙述艺术以多元的方式呈现了出来。     

基于移动平均模型对上海未来空气质量的定量评估

对2010年上海世博会相关重大事件活动效应进行估算有着十分重大的现实意义,其中部分问题的提出及解决方案对现实中的环境保护起着指导作用.以时间序列预测法的移动平均模型为依据,在对其进行改造的基础上,用通行的Excel程序包进行统计分析,实现了对世博会环境效应的定量评估.     

及物性过程的一致性和序列性——超越词汇层的衔接现象

传统的衔接分析往往基于词汇层,如词的指称、替代等,是从微观角度出发的分析,达不到反映整个语篇的结构关系。从系统功能语言学来看,任何语篇的过程类型都是有章可循的,并且是构建语篇的框架。本文通过对语篇实例进行及物性过程分析,发现语篇衔接也反映在小句及物性过程类型上,并可归纳为两种主要的衔接方式:及物性过程一致式、及物性过程序列式。对及物性过程进行的衔接分析超越了词汇层,是一种宏观的分析方法,它有助于读者把握全篇信息的分布走向,并对写作过程中的谋篇布局起到积极的指导作用。