电除尘器的新技术及其展望

简要介绍并分析了电矩收尘、透镜式电除尘器、雾滴荷电等除尘理论以及电除尘器本体和供电控制方面的新技术,分析和展望了电除尘器的未来发展,可为我国电除尘器的研究开发和运行改造提供参考。     

高层建筑火灾扑救的潜在危险及预防措施

摘要近30年来,商层建筑发展十分迅速,高层建筑火灾也随之开始频繁发生,在扑救火灾过程中,消防队员常常伤亡,就高层建筑灭火过程中的潜在危险进行分析并提出相应的预防措施。     

Deepening A Precautionary European Policy

In regulatory practice, the principle of precaution is hardly linked to the ideal of sustainable development. In this article, we argue that it should be. We argue that sustainable development is the sense of an ethics of co-responsibility, while precaution is the attitude needed to realize this sense. From this perspective, we comment on some regulatory practices within the European context regarding authorization requests for deliberate releases of genetically modified crops and show some problems that are popping up there, for example, the difficulties in interpreting the meaning of harm” (and of benefit”), the symptomatic gap between regulatory rule and political practice. Finally, we suggest that, in order to respond to such problems, precaution should find an appropriate translation in the fields of both research and innovation policy, of authorization policy and of economic policy.     

A river water quality model integrated with a web-based geographic information system

Scientists often use mathematical models to assess river water quality. However, the application of the models in environmental management and risk assessment is quite limited because of the difficulty of preparing input data and interpreting model output. This paper presents a study that links ArcIMS, a Web-based Geographic Information System (GIS) software to ROUT, a national and regional scale river model which evolved from the US Environmental Protection Agency's Water Use Improvement and Impairment Model, to create a WWW-GIS-based river simulation model called GIS-ROUT. GIS-ROUT is used to predict chemical concentrations in perennially flowing rivers throughout the continental United States that receive discharges from more than 10,000 publicly owned wastewater treatment plants (WWTPs). The WWTP chemical loadings are calculated from per capita per day disposal of product ingredients and the population served by each plant. Each WWTP, containing data on treatment type and influent and effluent flows, is spatially associated with a specific receiving river segment. Based on user defined treatment-type removal rates for a particular chemical, an effluent concentration for each WWTP is calculated and used as input to the river model. Over 360,000 km of rivers are modeled, incorporating dilution and first order loss of the chemical in each river segment. The integration of spatial data, GIS, the WWW, and modeling in GIS-ROUT makes it possible to organize and analyze data spatially, and view results on interactive maps as well as tables and distribution charts. The integration allows scientists and managers in different locations to coordinate and share their estimations for environmental exposure and risk assessments.     

重视地下水资源开发利用与保护

本文着重介绍了国内外地下水开发利用状况，以及造成水质严重污染，影响人类的生存，提出合理开发利用和保护地下水资源，已成为当今世界上的重要课题，提出了和措施，一，强调地下不和地表水是自然界水循环中两个密切相关的环境，必须统一管理，协调开发，二，应用计算机技术，建立管理模型。三，注意解决地表与地下水联合规划，海水入侵，地面沉降，工农业污染，人工回灌等，四，加强对水质和生态环境的保护。     

用灰色关联度模型评价湖泊富营养化

应用灰色关联度模型对大理州主要的８ 个湖泊水库进行富营养化评价。结果表明,８ 个湖泊水库都处于中营养级、评价结果与实际情况较为吻合。文章还提出了富营养化防治对策,为湖泊保护提供了科学依据。     

毒气泄漏过程及其危险区域分析

在化学事故中 ,毒气的大量泄漏扩散不仅会造成极其严重的人员和财产损失 ,同时会产生很大的社会影响。而在各种毒气泄漏方式中 ,以灾难性破裂引发的泄漏危害最大 ,而连续泄漏则更具广泛的代表性。笔者利用已有的理论模型 ,分析了这两种泄漏类型的特点及其扩散规律 ,提出了伤害区域的划分和估算方法 ,为准确地预测毒气扩散危险区域 ,及时采取有效措施组织抢险救援活动 ,提供了一种行之有效的方法     

粒子系统算法在建筑火灾可视化研究中的应用

论述了采用粒子系统建立火灾虚拟现实系统火灾现象的可视化表现原理、算法及特殊处理方法 ,为进一步研究火灾虚拟现实系统 ,提供基础理论和技术支持 ,也是培训消防人员技能和公众火灾自救互救、应急逃生能力的科学方法     

铁路行包营运管理信息系统安全监控仿真研究

从系统平台、通讯网络、数据库和业务应用系统 4个方面 ,分析了影响铁路行包营运管理信息系统安全的主要因素。借鉴国际标准化组织 (ISO)提出的开放式系统互联参考模型 (OSI RM )和Manager Agent模式 ,设计了层次型安全监控仿真系统 ,并在UnicenterTNG软件平台上进行了实现。实验结果表明 ,该仿真系统能够较好地实现对行包营运管理信息安全以及业务流程的监视。     

絮凝－旋流分离工艺处理磷酸铵生产废水

磷酸生产废水经絮凝－旋流分离工艺处理后，再回用于生产过程，实现了磷酸生产废水的闭路循环，不仅回收了废水中的磷酸，还节约了大量工业用水。