大气自动监测系统监测数据"有效性"讨论

根据统计推导出有效日均值允许缺测时数与允许误差和全日时均值均方差的理论关系式,应用于北京大气自动监测系统冬季二氧化硫小时浓度监测资料,计算出９５％置信度下随机缺测允许最大时数为６ｈ,与目前国家环保局要求７５％数据捕获率相一致。     

国控重点污染源监督监测数据QA/QC量化评估体系探讨

阐述了建立国控重点污染源监督监测数据质量QA/QC量化评估体系的重要性和迫切性,从国控污染源QA/QC量化评估体系建设的基本思路、量化评估指标的组成、量化评估指标的权重及QL阈值等方面,对国控重点污染源监督监测数据质量QA/QC量化评价体系的建立进行探讨。     

生态环境监测机构数据质量技术判断常见方法探讨

环境监测数据是客观评价环境质量状况、反映污染治理成效、实施环境管理与决策的基本依据。为了进一步加强环境监测过程管理,有效提高环境监测数据质量,以列举法对影响生态环境监测机构数据质量的样品采集、运输、交接和实验室分析等监测活动的各环节进行了技术分析,梳理总结了数据质量技术判断的常见方法,旨在为环境管理部门开展监督管理提供经验借鉴。同时,就进一步提高生态环境监测机构的监测数据质量提出了建议。     

实验室监测数据的合理性检验

通过比较总含盐量与溶解性总固体的关系、阴阳离子的平衡关系、总硬度与钙镁离子的关系及三氧之间的关系,进而检验实验监测数据的合理性和可靠性。     

连云港市首次污染源普查数据处理及二次开发应用的研究

通过开展连云港市污染源普查工作,全面掌握了各类污染源情况,包括工业源、生活源、农业源及集中式污染治理设施等,采集到大量的污染源普查数据。在实践中,我们采用先进的信息管理技术对污染源普查数据进行处理后利用G IS技术中具有支持空间数据的获取、管理、处理、分析、建模和显示及解决复杂的管理问题的功能开发连云港市污染源电子地图。这些污染源普查数据的二次开发应用,对新时期环保工作、编制环保规划、优化经济结构、制定环境政策、加强环境监管、实施污染源动态管理、建设环境友好型社会、维护群众环境权益等工作起到了十分重要的意义。     

静电除尘器自振特性研究

采用有限元方法对已竣工的某252m~2静电除尘器的动力特性进行了分析,并结合脉动实验的实测结果,提出了一种较为合适的计算简图。     

Water scarcity and rioting: Disaggregated evidence from Sub-Saharan Africa

It is often purported that unusually dry weather conditions provoke small-scale social conflict—riots—by intensifying the competition for water. The present paper explores this hypothesis, using data from Sub-Saharan Africa. We rely on monthly data at the cell level (0.5×0.5 degrees), an approach that is tailored to the short-lived and local nature of the phenomenon. Using a drought index to proxy for weather shocks, we find that a one-standard-deviation fall in the index (signaling drier conditions) raises the likelihood of riots in a given cell and month by 8.3%. We further observe that the effect of unusually dry weather conditions is substantially larger in cells with a lower availability of water resources (such as rivers and lakes), a finding that supports the significance of the competition-for-water mechanism.     

Response of soil fauna to simulated nitrogen deposition： A nursery experiment in subtropical China

We studied the responses of soil fauna to a simulated nitrogen deposition in nursery experimental plots in Subtropical China. Dissolved NH4NO3 was applied to the soil by spraying twice per month for 16 months, starting January 2003 with treatments of 0, 5, 10, 15 and 30 gN/(m2·a). Soil fauna was sampled after 6, 9, 13 and 16 months of treatment in three soil depths (0-5 cm, 5-10 cm, 10-15 cm). Soil available N increased in correspondence with the increasing N treatment, whereas soil pH decreased. Bacterial and fungal densities were elevated by the N treatment. Soil fauna increased in the lower nitrogen treatments but decreased in the higher N treatments, which might indicate that there was a threshold around 10 gN/(m2·a) for the stimulating effects of N addition. The N effects were dependent on the soil depth and sampling time. The data also suggested that the effects of the different N treatments were related to the level of N saturation, especially the concentration of NO3- in the soil.     

合肥台测震CTS-1系统处理软件

主要介绍了地震数据断记报警软件及其相关地震数据分类处理软件,此软件一方面保证了地震监测数据的连续性,另一方面使科研人员查询地震事件波形,迅速快捷,并可对典型地震事件和震相特征进行查看,提高对一些特殊地震震相的识别,从而也提高了地震的分析水平.     

沈阳市突发性环境污染事故应急地理信息系统

本文简要介绍了突发性环境污染事故地理信息系统的空间数据显示方法 ,并探讨了在 VB集成环境下 ,用Map Basic语言、SQL语言及 DAO来实现 Map Info电子地图上的空间数据处理技术。