ArcGIS在重点污染源监控系统中的应用

结合辽宁省污染源监测特点,将GIS技术应用于重点污染源在线监测管理系统中。污染源在线监测管理系统的结构设计采用B/S结构,使用ArcGIS提供的MAPServers将地图应用直接运行在Web浏览器中,并对系统结构、数据流程、系统功能、基础数据库等作了阐述。所开发的系统具有实时数据监测、地图显示发布、查询统计分析、超标故障报警、专题图制作等功能。     

区域水污染源在线监测监控系统的建立及其运维保障

建立区域水污染源在线监测监控系统在实施区域水污染源总量控制中具有重要作用,区域监控中心与各污染源在线监测站点组成了系统的基本构架,对系统进行有效维护,建立良好的运维保障体系,是建设区域水污染源在线监测监控系统并保障其正常运行的基本保证。     

城镇污水处理厂进、出水COD浓度变化规律分析

通过对某城镇污水处理厂进出水COD浓度进行手工与在线仪器24小时的对比监测,利用该厂在线监测数据,分析了城镇污水处理厂进出水COD浓度的日、周变化规律以及进水浓度与降水量的变化关系,明确了样品的代表性,为COD总量减排和环境管理提供了技术参考。     

SERES2000与HACH AMTAX SC氨氮在线测试仪的性能比较

文章通过对已投入运行的SERES2000与HACHAMTAXSC2种型号氨氮在线测试仪的基本性能、维护量、试剂用量等情况进行比较,得出对2台仪器的综合评价。     

石化企业检维修单位在线作业过程的危害识别与风险评价

运用工作危害分析方法对在线检维修作业活动进行危害识别与风险评价,对重大风险提出有效的控制措施,以杜绝和减少事故的发生.     

流动注射在线富集原子吸收法测定痕量铅镉

在含铅、镉的试液中加入pH=5.72乙酸-乙酸钠缓冲溶液3.20 mL,泵的转速恒为5 mL/min,用自制的强酸性阳离子交换树脂柱对试液中的铅、镉在线富集150 s,1.50 mol/L HNO3溶液洗脱20 s,火焰原子吸收法测定铅、镉的含量。该方法的线性范围分别是0~80.0μg/L、0~40.0μg/L,检出限分别为3.0μg/L、1.0μg/L,富集倍数分别为40倍、35倍。用该方法测定地表水中铅、镉的含量,结果满意。     

Characterising the performance of a tapered scrubber for controlling particulate emission

The performance of a modified tapered scrubber using water is presented in this article. The column is fabricated with internals so as to improve the performance of a simple tapered bubble scrubber. Experimentation indicates that the system developed can obtain almost 100% particulate (fly ash) removal efficiency under certain hydrodynamical conditions and the removal efficiency has been found to be higher than the existing similar systems. An empirical correlation is put forward for the prediction of removal efficiency as a function of relevant variables of the system. Experimental results agree very well with the correlation.     

准组织化:“互联网+线上应急救援”的实践路径和现实困境*—以河南郑州“7·20”特大暴雨灾害事件为例

为响应我国应急管理现代化和信息化建设需要,采用参与式观察、网络民族志和深度访谈方法,从准组织化集体行动视角切入,对河南郑州“7·20”特大暴雨灾害事件中救援模式相对成熟的“互联网+线上应急救援”实践路径和现实困境进行探讨。研究结果表明:线上应急救援实践路径涵盖聚合、运转、高效、离散4个阶段,且以持续不断的行动流呈现,具有准组织化集体行动特征;同时,线上救援形式面临“合法性”不确定、救援质量不稳定、风险评估主观性和政府正式沟通渠道有限性等现实困境,研究结果可为我国应急管理信息化建设提供参考。     

On-line controlling system for nitrogen and phosphorus removal of municipal wastewater in a sequencing batch reactor (SBR)

The objectives of this study were to establish an on-line controlling system for nitrogen and phosphorus removal synchronously of municipal wastewater in a sequencing batch reactor (SBR). The SBR for municipal wastewater treatment was operated in sequences: filling, anaerobic, oxic, anoxic, oxic, settling and discharge. The reactor was equipped with on-line monitoring sensors for dissolved oxygen (DO), oxidation-reduction potential (ORP) and pH. The variation of DO, ORP and pH is relevant to each phase of biological process for nitrogen and phosphorus removal in this SBR. The characteristic points of DO, ORP and pH can be used to judge and control the stages of process that include: phosphate release by the turning points of ORP and pH; nitrification by the ammonia valley of pH and ammonia elbows of DO and ORP; denitrification by the nitrate knee of ORP and nitrate apex of pH; phosphate uptake by the turning point of pH; and residual organic carbon oxidation by the carbon elbows of DO and ORP. The controlling system can operate automatically for nitrogen and phosphorus efficiently removal. __________ Translated from Water & Wastewater Engineering, 2006, 26(5): 728–733 [译自: 给水排水]     

光电测量技术在狭小空间电场测量中的应用

电磁场测量的精确度是电磁兼容测试重要的指标。传统的电场测量,使用了金属结构的天线以及金属电缆,这些都不可避免给测量系统引入干扰,造成被测场的扰动。这一点对于小空间内电磁环境测量尤为显著,因此,需要引进对被测场扰动小的光电测量技术。论述了光电测量技术和测量设备在电磁兼容领域的发展,并阐述了在狭小空间内开展光电测量遇到的难题。