基于FY-4A卫星数据反演气溶胶光学厚度及分析应用

风云四号A星（FY-4A）是我国新一代静止气象卫星,多通道扫描成像辐射计（AGRI）是风云四号静止气象卫星的主要载荷之一.为探究FY4A数据用于气溶胶光学厚度（AOD）反演的可行性,基于FY-4A/AGRI数据,利用暗像元算法对2019年2月23~26日及10月27~30日京津冀地区AOD进行反演研究,并与AERONET地基观测AOD数据进行了对比分析.结果表明,基于FY-4A数据及构建响应函数库,通过暗像元方法能较好的反演出京津冀地区气溶胶空间分布;AOD主要的高值区体现在京津冀中南部地区并向周边郊区逐渐降低,在AOD值较大时此特征较为明显;将反演值与同期AERONET地基观测数据对比验证,相关系数达到0.869,均方根误差为0.221,表明AOD反演值与观测值吻合较好,FY-4A卫星数据反演AOD具有一定可行性.     

化学强化一级处理系统BP神经网络建模研究

运用实验室得到的数据为样本，选取了CODcr和絮凝剂投加量为指标，采用三层结构的神经网络，利用Matlab的神经网络工具箱中的批处理梯度下降法对CEPT系统进行辩识。辩识结果表明：模型的预测值与实测值的平均误差在3．7％左右，具有较高的精度。同时，该模型还具有适应性强，使用方便，高效的特点，为CEPT系统的在线实时控制提供了一条有效的途径。     

移动通信基站电磁辐射污染分析及对策

移动通信基站发射天线产生的电磁波对环境造成电磁辐射污染，通过对沈阳移动通信公司部分基站产生的电磁辐射强度的测试，摸清了污染特点及规律，为今后环境管理规范化提供重要依据．     

B-P神经网络在环境空气质量预报中的应用

通过对神经网络应用实例的论证,探讨B-P神经网络应用于环境空气质量预报的可行性及其先进性.B-P神经网络对污染物浓度变化趋势的预测较线性回归统计模式更为敏感,其预测值的绝对误差也比线性回归统计模式小.显示出其逼近精度高、训练学习速度快、对基础数据时间长度要求不高的优越特性.     

流域环境规划的可视化技术

介绍了应用于流域环境规划中的图形图片方式、多媒体影像方式、地理信息可视化以及虚拟现实4种类型的可视化技术,并对流域环境规划的不同阶段、不同内容的可视化应用进行了阐述。     

重大危险源计算机监控与预警系统

探讨了重大危险源计算机监控与预警系统的组成结构和各部分实现的功能，介绍了 两例监控与预警系统，并就监控与预警系统的网络设计进行了论述。     

矿井安全CIMS技术研究

针对矿区CIMS技术的发展需要,探讨了以安全信息为主要内容的可视化系统,介绍了系统的功能、结构和技术特点.该系统具有工作可靠,使用方便的优点,能较好地实现煤矿安全信息的可视化和智能化集成管理,为矿井安全可靠运营提供保障.     

Significant developments in sustainable development law and governance: A proposal

This article develops a practical proposal for progress on sustainable development law. It examines the prospects for an international sustainable development law to provide a framework for more effective, coherent governance. Sustainable development law is briefly defined and an analytical framework is provided. Different degrees of integration between economic, social and environmental law are described. Certain principles of international law related to sustainable development are also highlighted. It is argued that these principles may serve to guide law‐makers and jurists where social, economic and environmental law and policy conflict or overlap. Continuing, underlying questions of sustainable development governance are addressed and its global frameworks analysed. The article also focuses on the 2002 World Summit on Sustainable Development, held in Johannesburg in August‐September 2002, and its specific mandate for the United Nations Commission on Sustainable Development (UNCSD) to take related legal developments into account. The article advances a proposal: that governments, economic, social and environmental intergovernmental organizations and other actors establish a ‘network of inquiry’ with members from relevant groups, including legal and academic organizations, and other expert groups, in order to follow, research, analyse and debate legal developments in a balanced way.     

基于CAN总线的分布式安全报警系统

CAN总线是一种多主站局部网络 ,支持分布式控制系统或实时控制系统的通信功能 ,具有检错功能强 ,抗干扰 ,传输速率高等优点 ,广泛应用于工业控制领域。笔者以CAN总线技术为基础 ,用单片机和个人计算机组成分布式安全报警系统 ,该系统具有开放性、全分散体系结构、安装维护简单等特点。笔者介绍了该系统的总体构成及其软件和硬件设计。试验结果表明 ,该系统实现了事故现场、住户与住宅小区三者联系的安全报警功能。系统稳定性好 ,实时性强 ,报警准确。     

Connecting the Dots: Public Engagement with Environmental Data

Air pollution and other environmental hazards are often imperceptible and need to be made publicly visible. The paper argues for the importance of visualizations in drawing public attention to imperceptible hazards and in providing the public with access to empirical data describing the risks. It also argues for critical inquiry into hazards’ selective visibility as it is produced by visualizations. The impact of visualizations and their selective visibility are considered through the example of a public art project called Particle Falls installed in 2014 in Pittsburgh, a city with a long history of both ignoring air pollution and working to ameliorate this problem. I examine the impact and selective visibility of Particle Falls by considering the underlying production of data, as well as context and support systems for this visualization, and by comparing it with other visualizations of local air quality.