2021年面临的不确定性

在步入新年之际,有一点是显而易见的:新冠病毒不会消失。尽管我们已经从2020年春天的首轮封锁造成的经济低谷中取得了实质性复苏,但全球GDP和就业所遭遇的损失足以使之成为过去百年来第二或第三糟糕的经济衰退,即使刚刚问世的新冠肺炎疫苗也无法改变这一事实。     

用于高频的新颖开关电容积分器

本文研究了用于开关电容(SC)滤波器的离散积分器,所推荐的积分器是由无耗离散积分器(LDI)和双线性离散积分器的最佳线性结合而成,因此,称之为组合离散积分器(CDI)。由于这个积分器使正常转折频率增加一倍,并使高频离散积分器误差减少到最低限度,所以它对高频应用是理想的。文中给出了组合离散积分器的几种SC实现,并且还给出了以组合离散积分器为基础,模拟一般一阶和二阶的模拟滤波器单元的SC电路。     

Projecting the future size and health status of the U.S. elderly population

"A projection model based on a multivariate continuous state, stochastic process is presented. The model allows multiple time-varying covariates to be used so parameters can be estimated from time series information on health changes and mortality, and their interaction. Health changes are simulated by altering parameters controlling the age trajectory and diffusion of risk factor means, variances, and covariances....By increasing the information used in projections it may be possible to better (a) anticipate the state of health at extreme ages, (b) forecast changes in health at specific ages over time, (c) stimulate the effects of specific interventions, and (d) determine the sensitivity of outcomes to a range of interventions."     

Yes, the market can curb health costs

Memo to Clinton's transition team: forget those tough expenditure ceilings you're considering. Look instead at what managed competition is already accomplishing.     

A vision for excellence

One hospital integrates employee relations, customer service and commitment to quality into one successful, award-winning program. Employees at AMI Palmetto General are motivated to constantly consider the hospital's goals and strive for excellence.     

艾滋病与经济

本文系为世界卫生组织宏观经济和卫生委员会第一工作组撰写,文章原名为Aids & Economics,原载于http://www.iaen.org/files.cgi/7055_bloom_economics.pdf(2001年11月)。翻译此文,是基于世界范围内的艾滋病流行,给各国经济和社会发展都造成了严重影响。中国在经济实现快速增长的同时,也面临着所获成果有被艾滋病吞噬的危险。本文作者利用20世纪80年代及90年代初的调查数据,从宏观及微观的角度就HIV/AIDS对柬埔寨、越南及非洲一些国家的经济所造成的影响进行了回顾,分析了二者之间错综复杂的关系;同时以泰国为例探讨了预防艾滋病病毒感染所可能带来的经济收益,呼吁各国增加对艾滋病防治工作的投入。译者切望通过本文能够引起更多人对艾滋病防治问题的关注,增加对公共卫生领域的财政和人力投入。