冷原子荧光法测定生活垃圾堆肥产品中汞

通过试验研究,建立了用王水消解、冷原子荧光法测定生活垃圾堆肥产品中汞的方法.本方法的检出限为0.006 mg/kg (按称取0.5 g试样消解定容至50 ml计算),用于国内不同地域的堆肥样品测定,其相对标准偏差(RSD)在2.55%～10.7%之间,加标回收率介于91.0%～108.0%,可作为一种较理想的检验堆肥产品质量的方法.     

赤潮监测技术的现状与发展

赤潮监测是对赤潮进行研究和实施管理控制的重要环节,通过监测获取重要信息,为赤潮研究提供重要资料,也是赤潮预测、预报和减灾的依据。本文介绍了中国赤潮监测技术的三个发展阶段,赤潮监测技术方法及其两个发展方向。目前我国赤潮监测技术基础比较薄弱,今后利用遥感等先进技术、完善赤潮应急监测系统,将大大加强赤潮监测力度,急时跟踪赤潮发生状况。     

Monitoring the Environment: Taking a Historical Perspective

This paper introduces the five papers that follow, all of which were originally presented at a workshop titled Monitoring the Environment: Scales, Methods, and Systems in Historical Perspective. The workshop, sponsored by the Society for the History of Technology and the American Society for Environmental History, examined past efforts to develop tools, methods, and systems for measuring or monitoring some aspect of the physical environment. Four of the papers included here focus on various aspects of air quality monitoring; the fifth has to do with monitoring the earth from space. Despite differences in time period and approach, each article examines how specific tools and methods – and the motivations for developing those tools and methods – evolved. Among other things, these papers make clear that systems for monitoring various aspects of the physical environment are shaped by a variety of stakeholders and suggest that efforts to construct such systems should not be viewed as a purely technical task.     

质谱技术在环境突发性事故中的应用

介绍了质谱技术在环境突发性事故应急监测中的应用,通过分析化工仓库爆炸应急监测和水厂污染事故调查监测两个实际案例,指出质谱技术能提供准确的定性定量结果,是环境突发性事故应急监测强有力的手段和工具.     

Carrots and sticks for new technology: Abating greenhouse gas emissions in a heterogeneous and uncertain world

Many governments use technology incentives as an important component of their greenhouse gas abatement strategies. These carrots are intended to encourage the initial diffusion of new, greenhouse-gas-emissions-reducing technologies, in contrast to carbon taxes and emissions trading which provide a stick designed to reduce emissions by increasing the price of high-emitting technologies for all users. Technology incentives appear attractive, but their record in practice is mixed and economic theory suggests that in the absence of market failures, they are inefficient compared to taxes and trading. This study uses an agent-based model of technology diffusion and exploratory modeling, a new technique for decision-making under conditions of extreme uncertainty, to examine the conditions under which technology incentives should be a key building block of robust climate change policies. We find that a combined strategy of carbon taxes and technology incentives, as opposed to carbon taxes alone, is the best approach to greenhouse gas emissions reductions if the social benefits of early adoption sufficiently exceed the private benefits. Such social benefits can occur when economic actors have a wide variety of cost/performance preferences for new technologies and either new technologies have increasing returns to scale or potential adopters can reduce their uncertainty about the performance of new technologies by querying the experience of other adopters. We find that if decision-makers hold even modest expectations that such social benefits are significant or that the impacts of climate change will turn out to be serious then technology incentive programs may be a promising hedge against the threat of climate change.     

构造人工湿地技术及其应用

通过介绍构造人工湿地对特征污染物即悬浮物、有机物、氮、磷、细茵以及重金属的去除研究，阐述了污染物去除的基本特征和作用机理，并在植物的选择、设计参数、动力学研究三方面就构造湿地设计进行了探讨与分析，对未来的研究工作作了展望。     

Nitrogen transformations during pig manure composting

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浅谈气相防锈技术

简单地介绍了目前在金属防锈领域广泛应用的气相防锈技术的防锈机理和该技术的优点,重点介绍了当前所使用的气相防锈剂种类和气相防锈材料的现状,并对气相防锈塑料薄膜的优点和制作方法以及其发展趋势进行了分析,指出了国内气相防锈技术的差距和其良好的发展前景.     

圆筒件拉深极限理论及计算机辅助工艺设计

此文从实际变形条件下变形区的应力、应变分析以及传力区的实际强度入手,从理论上建立了筒形件拉深失效的判定原则,并编制出了实用的计算机工艺设计程序。     

探索多媒体和网络技术在秘书写作教学中的运用

运用多媒体和网络技术进行秘书写作教学,其教改优势体现在以下几方面:教学手段新颖,加大了教学密度;优化了讲、写、评、阅等教学环节,师生对话得到进一步加强;使考试、评价、反馈系统的操作变得方便快捷,同时也有利于提高学生使用电脑综合处理文字的能力。