Cellular telephones and motor-vehicle collisions: Some variations on matched-pairs analysis

We describe the analysis of some matched-pair binary data arising from a study designed to investigate whether cellular-telephone use is associated with motor-vehicle collisions. Conditional and random effects approaches to the problem are derived and compared. Driving intermittency is a potential confounder whose effect is assessed by strategic choices of the control period and by application of the bootstrap. The marked discrepancy between the conditional and random approaches merits further study.     

高能重离子碰撞的时空演化与流体力学模型

本文分析了高能核—核散射的时空演化,在流体力学模型的基础上,讨论了状态方程,夸克胶子等离子体的形成及末态粒子的分布.     

外场操控的原子与分子碰撞

对原子与分子碰撞研究的历史进行了简单的回顾,特别是对近几十年来外场下的原子与分子碰撞研究进行了综述,并对原子与分子碰撞的外场操控研究前景进行了展望.     

论诗的译语言说策略－－唐诗英译对比研究

在唐诗英译的对比分析基础上,讨论了文学翻译活动中的言意矛盾,以及在意向言的转化过程中与译语言说策略相关的三方面问题(1)体现原语文化规范的语言结构和制约言语活动的话语形态;(2)原语文本中意向性关联物的有限性;(3)原语文本结构的非连续性或空缺.     

高能核-核碰撞末态产生粒子的赝快度分布

利用Glauber模型，讨论了重离子碰撞中的核子-核子碰撞数，并以此为基础，考虑了碰撞中核子的能量损失效应，给出了核-核碰撞末态多重数的赝快度分布随碰撞参数的变化方程．并用其分析了BRAHMS合作组在√SNN=200GeV的Au＋Au碰撞中的实验测量，所得结果与实验相符合。     

Extended stirling family of discrete probability distributions

In this paper. introduced is a family of discrete probability distributions. whose probability function includes explieitly the Striling-Carlitz polynomial of the first or the second kind. The new family extends the stirling family of distributions. Sibuya (1988) includes the conditional distributions of the orginal ones and enlarges the application area.     

Measures of Societal Risk and Their Potential Use in Civil Aviation

This article seeks to clarify the conceptual foundations of measures of societal risk, to investigate how such measures may be used validly in commonly encountered policy contexts, and to explore the application of these measures in the field of civil aviation. The article begins by examining standard measures of societal and individual risk (SR and IR), with attention given to ethical as well as analytical considerations. A comprehensive technical analysis of SR is provided, encompassing scalar risk measures, barrier functions, and a utility‐based formulation, and clarifications are offered with respect to the treatment of SR in recent publications. The policy context for SR measures is shown to be critically important, and an extension to a hierarchical setting is developed. The prospects for applying SR to civil aviation are then considered, and some technical and conceptual issues are identified. SR appears to be a useful analytical tool in this context, provided that careful attention is given to these issues.     

高能Au+Au碰撞末态多重数赝快度分布研究

利用Glauber模型,计算出核核碰撞中的参与者数、旁观者数及二元核子核子碰撞数.考虑到能量损失和旁观者效应对末态带电粒子赝快度分布的影响,通过对核子核子碰撞快度分布的逐次叠加得到核核碰撞末态带电粒子的赝快度分布.并用其讨论了PHOBOS合作组在高能Au+Au碰撞所做的实验测量.理论与实验结果符合得很好.