关于减少常州焦化厂锅炉烟囱二氧化硫排放量的探讨

燃煤锅炉是工厂中大气污染重点污染源之一，本文从生产实践的角度，简要论述了锅炉燃煤过程中二氧化硫形成的原因，企业减少二氧化硫排放的一些具体措施，以及采取措施后取得的良好效果。     

The cell's journey: from metaphorical to literal factory

The concept of the cell has been based on metaphor since its inception, and the history of cell theory has continued to rely on metaphor and analogy. In the nineteenth century, cells were most popularly conceived either as building stones or elementary autonomous organisms from which larger organisms are composed. With advances in physiology and the rise of modern biochemistry in the early twentieth century, the chemical factory or laboratory became the dominant metaphor for this biological unit. Today in the twenty-first century, the metaphorical imagery has become a reality, with cells acting as chemical factories for the synthesis of commercially valuable bio-products. The history of the cell shows how metaphors act as conceptual tools, with particular strengths for facilitating different sorts of questions and experimental techniques.     

Stinks and bangs: the heyday of the chemistry set

When you hear the phrase 'chemistry set', what is the first image that pops into your head? Is it one of a mad scientist in a dark laboratory full of pieces of glassware bubbling over? Is it your high school or college chemistry lab? For many, the phrase evokes a time of exploration and experimentation, a time where a child could be and do anything they could imagine. Although first and foremost to be a toy providing hours of entertainment, chemistry sets also allowed children to interact intimately with science. It is these interactions that led many to go on to become famous chemists and physicists. By studying these sets - their content, the imagery surrounding them and the people that used them - we can hopefully better understand how society viewed, and continues to view, science.     

环境规制的节水效应分析——基于正式环境规制与非正式环境规制的视角

为从根本缓解水资源对工业发展的束缚,反思现有环境规制政策能否有效实现节水效应。基于脱钩测度模型和面板门槛模型,分别验证正式环境规制与工业用水以及非正式环境规制与工业用水的关系,进一步引入正式与非正式环境规制的交互项进行分析。结果表明:环境规制与工业用水量处于从“震荡波动”到“持续脱钩”的状态,工业用水量随着环境规制的变化出现平稳或者减少的趋势。正式和非正式环境规制与工业用水量之间都呈倒U型曲线关系,用水库兹涅茨曲线存在。此外,正式环境规制与非正式环境规制之间存在双向传导路径,相互促进对方对工业用水的作用效果。因此,政府需要强化对非正式环境规制的重视,增强环境规制工具的节水效应,促进工业企业的转型升级。     

浅议固定性制造费用的分析方法

现行固定性制造费用分析，无论是“两差异分析法”还是“三差异分析法”，一般只叙述方法，不谈为什么进行这样的分析，即现有固定性制造费用分析的目的不清，所用方法不能很好的满足分析的需要。本文旨在明确分析目的的基础上，指出原有分析方法的缺陷，并提出改进固定性制造费用分析的新方法。     

上海市高新技术企业区位

高新技术产业区位的研究已逐步成为城市经济理论研究中非常活跃的领域。本文借助地理信息系统(GIS)手段 ,实证研究了上海市高新技术企业 ,探讨了高新技术产业企业区位选择的特殊性。发现作为高新技术企业创新源的高校及科研院所 ,与高新技术产业之间存在着区位上的相互接近性 ;另一方面 ,由于市中心区高昂地价和过度城市化所造成的限制 ,高新技术产业的区位又具有向已有一定发展的边缘城市分散、聚集的趋势     

浅谈西藏鲁琼炸药厂综合防雷技术

鲁琼炸药厂属易然易爆场所,是一个系统的综合防雷工程,既要防直接雷击,又要防雷击电磁脉冲,在实际操作中,必须全面考虑,综合治理,整体规划,合理布局,精心施工,多重保护.利用现代防雷技术措施将雷击危害减少到最低限度.现将炸药厂综合防雷工程做法及经验进行交流,望同行共同探讨.     

Green chemistry: a tool for the sustainable development of the chemical industry

<正>Most manufactured products involve one or more chemical processes.We cannot imagine what our life will be like without the products produced by the chemical industry.However,on average,only a small proportion of the resources we take from the Earth is converted into the desired products in current chemical processes,and large amounts of wastes and hazardous materials are generated.How to supply humanity with enough food,