电除尘器检修管理信息系统的开发

介绍了电除尘器的应用情况及运行维护中主要检修内容。将需要除尘的电厂作为使用对象开发一个电除尘器检修管理信息系统,主要任务有前端应用程序的开发和数据库的设计与数据的准确录入,选用Visual Basic 6.0和Microsoft Access 2003相结合开发一个可视化的管理系统。该系统能为使用电除尘器的电厂提供基本的检修管理服务,从而保证电除尘器的安全、稳定运行。     

环境监测站如何切实开展仪器设备的期间核查

为保持检测设备使用过程中校准状态的可信度，设备在二次检定之间需进行期间核查。本文从环境监测站的实际工作出发，论述了实验室开展仪器设备期间核查的方法。     

长江南京段近岸沉积物和土壤中重金属分布特征分析

通过测定沉积物和土壤中Cd、Pb、Cr、Zn、Cu、Ni 6种重金属元素的平均含量,计算其富集因子,分析长江南京段近岸沉积物和土壤中重金属的空间分布特征,结果表明,几种重金属在沉积物中的富集次序为:CdPbCr1NiCuZn,在土壤中为:CdZnCu1CrPbNi,除Zn和Cu外,其他几种金属在沉积物中的富集程度高于土壤,同时Cd的含量超过土壤环境质量三级标准。以Cd和Pb为例分析了重金属含量与沉积物粒级之间的关系,回归分析显示,Cd、Pb的含量与颗粒物的粒级呈显著的相关性,与细颗粒物的含量有密切关系,细颗粒携带的重金属,在长江水力分选作用下到达下游,成为沉积物中重金属的主要来源。     

装备使用风险管理模型研究

在军事行动中,使用了大量复杂的装备系统,存在相当多的风险因素。如果对其中的风险因素管理不善,风险转化为事故,将造成极大的损失,严重影响部队的战斗力。装备使用风险管理是针对这一问题提出的概念。装备使用风险管理是在提高绩效和最大化作战能力时,用来识别、评估和控制风险的一个逻辑化的决策过程。本文通过分析装备使用风险管理的系统模型——"人-装备-环境-管理-任务"之间的关系及相互作用,并且详细的说明了装备使用风险管理的过程,危险识别、风险评估、分析风险控制、风险控制决策、实施风险控制、监督与评审等六个步骤的过程模型,探讨了风险管理的实施,并且认为风险管理过程的目标就是达到5M模型的最优化。为部队实施风险管理提供参考。     

环保设备买卖合同的法律风险防范——以卖方为视角

结合有关案例,探讨了作为卖方的环保企业在签订环保设备买卖合同时,涉及协商谈判、内容签订、合同履行等应注意的法律风险问题,以及防范和应对风险的措施。     

Influencing Factors of the Levels of Intensive Use of Typical Industrial Land

The article establishes an evaluation index system of the intensive land use from the perspective of enterprises. It is based on the questionnaire survey and evaluates the levels of the intensive use of the land in the electrical machinery and equipment manufacturing industry in Changzhou, Nantong, and Yancheng of Jiangsu Province. The evaluation result shows that there is obvious difference in the levels of the intensive use of the land in this industry in the three cities. The present article makes a detailed analysis on the causes of the difference. The analysis shows difference in results of the socio-economic and urban development stage, industrial features, population density, and technological progress. Finally, it proposes some suggestions to improve the efficiency of the industrial land use.     

基于资源约束的装备可持续发展策略研究

随着军队现代化的高速发展,严峻的资源短缺问题日益凸显,严重制约了装备的持续发展。为缓解制约装备可持续发展的资源"瓶颈",必须改变传统的粗放式发展模式,将可持续发展理念贯穿到装备全寿命周期,走资源节约型、环境友好型装备发展道路。结合我军装备建设实际情况,以实现装备可持续发展为前提,从装备科研领域、采购管理、使用管理、维修保障及退役报废5个领域入手,确定当前我军装备发展需要的新目标、新要求,借鉴国内外先进的管理理念和技术,找出适合我军特色的装备可持续发展途径,为下一步装备建设提供参考。     

Temporal trends (1990-2000) in the concentration of cadmium, lead and mercury in mosses across Europe

The European heavy metals in mosses survey provides data on the concentration of 10 heavy metals in naturally growing mosses. The survey has been repeated at five-yearly intervals and in this paper we report on the temporal trends in the concentration of cadmium, lead and mercury between 1990 and 2000. Metal- and country-specific temporal trends were observed. In general, the concentration of lead and cadmium in mosses decreased between 1990 and 2000; the decline was higher for lead than cadmium. For mercury not enough data were available to establish temporal trends between 1990 and 1995, but between 1995 and 2000 the mercury concentration in mosses did not change across Europe. The observed temporal trends for the concentrations in mosses were similar to the trends reported for the modelled total deposition of cadmium, lead and mercury in Europe.     

Effects of phytoextraction on heavy metal concentrations and pH of pore-water of biosolids determined using an in situ sampling technique

Heavy metal concentrations and pH of pore-water in contaminated substrates are important factors in controlling metal uptake by plants. We investigated the effects of phytoextraction on these properties in the solution phase of biosolids and diluted biosolids in a 12-month phytoextraction column experiment. Phytoextraction using Salix and Populus spp. temporarily decreased pore-water pH of the substrates over the experimental period followed by a return to initial pH conditions. Salix × reichardtii and Populus balsamifera effectively extracted Ni, Zn and Cd and actively mobilized these metals from the solid to the solution phase. S. × reichardtii had the stronger effect on mobilization of metals due to its larger root system. Phytoextraction did not affect Cu in the solution phase of the biosolids. Heavy metals were leached down to lower depths of the columns during the phytoextraction process.     

Date palm (Phoenix dactylifera L.) leaves as biomonitors of atmospheric metal pollution in arid and semi-arid environments

The leaves of date palms were evaluated as a possible biomonitor of heavy metal contamination in Ma’an city, Jordan. Concentrations of (Fe), (Pb), (Zn), (Cu), (Ni), and (Cr) were determined in washed and unwashed leaves and soil samples collected from different sites with different degrees of metal contamination (urban, suburban, industrial, highway and rural sites); separate leaves were taken from outside the city to be used as a control sample. Samples collected from industrial sites were found to have high concentrations of all metals except those of Cu, Ni and Pb, which were found at high levels in the highway site samples which is associated with the road traffic. The difference between unwashed and washed samples showed that metal pollutants exist as contaminants, particularly Pb, Zn and Ni, which varied in concentration, depending on the source of the metal.