A Risk-Benefit Analysis of French High Fish Consumption: A QALY Approach

The health risk and the nutritional benefit of a food are usually assessed separately. Toxicologists recommend limiting the consumption of certain fish because of methylmercury; while nutritionists recommend eating more oily fish because of omega 3. A common evaluation is imperative to provide coherent recommendations. In order to evaluate the risks along with the benefits related to fish consumption, a common metric based on the quality-adjusted life year (QALY) method has been used. The impact of a theoretical change from a medium n-3 PUFAs intake to a high intake is studied, in terms of the cardiovascular system (CHD mortality, stroke mortality and morbidity) and on fetal neuronal development (IQ loss or gain). This application can be considered as a sensitive analysis of the model used and looks at the impact of changing the dose-response relationships between cardiovascular diseases and n-3 PUFAs intakes. Results show that increasing fish consumption may have a beneficial impact on health. However, the confidence interval of the overall estimation has a negative lower bound, which means that this increase in fish consumption may have a negative impact due to MeHg contamination. Some limits of the QALY approach are identified. The first concerns determination of the dose-response relationships. The second concerns the economic origins of the approach and of individual preferences. Finally, since only one beneficial aspect and one risk element were studied, consideration should be given to how other beneficial and risk components may be integrated in the model.     

基于JIT配送的3PL运输协调调度问题建模与分析

近年来,随着第三方物流(Third Party Logistics,3PL)的日益成熟,其服务的专业性越来越高。相当数量的制造商们把产品的运输与配送外包给3PL以缩短订单处理的时间。本文研究Just-in-Time(JIT)背景下由3PL主导的供应链中3PL协调调度问题。3PL给出运输工具的出发、到达时间、可用的运载容量及相应的价格。制造商根据其生产调度和订单配送要求,有选择的使用3PL的运输资源,以最小的成本达JIT配送的目的。本文建立了该问题的数学模型,并证明了相应的计算复杂度。最后通过仿真实验验证计算复杂度。     

联图P_(1)(?)T_(n)和P_(1)(?)T_(3)的优美性

本文给出了一类图P_1(?)T_n和P_1(?)T_3,并给出了其优美性的证明.     

A note on the queue with a random set-up time under a restricted admissibility policy with a Bernoulli vacation schedule

This paper deals with the queue size distribution of an M^x/G/1 queue with a random set-up time and with a Bernoulli vacation schedule under a restricted admissibility policy. This generalizes the model studied by Madan and Choudhury [Sankhyá 66 (2004) 175–193].     

制作家畜骨架标本脱脂漂白法的改良

通过试验,对制作家畜骨架标本的脱脂漂白法进行了改良。以煮沸的2％—3％Na_2CO_3脱脂和日光曝晒增白,替代了使用有机溶剂脱脂和化学增白剂漂白,其方法简易、经济、安全、实用。经对28具家畜骨架标本和数千枚散骨标本的制作和使用,其制成的骨架标本形态美观、正确、色白、耐用。     

英汉数字“三”的文化对比及其翻译

在不同的文化中，数字不仅具有简单的计算功能，而且蕴含的文化信息能鲜明地体现该民族的思维方式、社会政治、传统习俗、社会心理，等等。文章比较了数字“三”在中西文化中的不同涵义，并对其差异形成的原因进行分析，探讨可行的翻译方法。     

1-苯基环己硅烷类液晶化合物的量子化学研究──联苯基乙烷系列

运用ＰＭ３ 和ＡＭ１ 两种ＳＣＦ－ ＭＯ 方法，通过能量梯度全优化计算，给出了５ 种１－ 苯基环己硅烷类液晶化合物的稳定几何构型、电子结构和生成热、偶极矩等基本性质，并联系有机电子结构理论进行了讨论     

H2O2与UV／TiO2协同体系光催化降解酸性品红的研究

采用高压汞灯为光源，考察了H2O2与UV／TiO2协同体系对酸性品红的降解效果。结果表明：H2O2提高了UV／TiO2光催化降解酸性品红的速率。同时，研究了影响纳米TiO2光催化降解酸性品红的主要影响因素。实验结果表明：初始PH值等于7时，光催化效率最佳；随着初始浓度的增加光催化降解效率降低；TiO2的最佳用量为0．2g/L。     

湖南省城市等级体系分析

在一个国家或者区域，因城市所处的内外条件不同会形成城市间不同的职能分工，同时也形成不同的城市规模。利用湖南各市的人口数据，讨论湖南省的城市人口规模体系及分布特征，表明湖南省城市规模呈现相对均衡的等级分布，并分析其首位度不高的形成原因。为了提高城市体系的整体实力，湖南提出了长株潭一体化和“3＋5”城市群的发展策略。     

论循环经济条件下建筑材料的开发与利用

在总结建筑材料开发与利用现状及存在的问题并深入分析其原因的基础上,遵循循环经济"减量化、再使用、再循环"的3R原则,从转变观念意识、加强科技创新、致力体制改革、严格管理等方面,提出了建筑材料开发与利用的对策。