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北京大气重污染过程PM_(10)中水溶性盐的研究 被引量:27
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作者 张凯 王跃思 +3 位作者 温天雪 胡波 刘广仁 Meslmani Yousef 《中国环境科学》 EI CAS CSCD 北大核心 2006年第4期385-389,共5页
利用大气颗粒物快速捕集及化学成分在线分析系统,观测了2004年秋季北京出现的一次长时间严重污染天气过程中PM10的水溶性无机盐浓度的变化.结果表明,PM10中总水溶性无机盐浓度在这次重污染过程中升高了4.7倍.硝酸盐、硫酸盐、铵盐的浓... 利用大气颗粒物快速捕集及化学成分在线分析系统,观测了2004年秋季北京出现的一次长时间严重污染天气过程中PM10的水溶性无机盐浓度的变化.结果表明,PM10中总水溶性无机盐浓度在这次重污染过程中升高了4.7倍.硝酸盐、硫酸盐、铵盐的浓度分别升高7.9,4.1,5.4倍,这3种无机盐的日变化在污染期和非污染期有明显差异.污染期SO2、NOx向SO42-、NO3-转化率明显高于非污染期. 展开更多
关键词 重污染 PM10 硝酸盐 硫酸盐 铵盐
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青藏公路边坡防护试验研究(英文) 被引量:3
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作者 陈济丁 何子文 +1 位作者 房海 李齐军 《冰川冻土》 CSCD 北大核心 2004年第S1期291-295,共5页
The results brought out in the trials of slope protection along Qinghai-Tibet Highway are presented in this paper. The trials were carried out simultaneously at 5 sites in Qinghai-Tibet Plateau from 2000 to 2002. Alti... The results brought out in the trials of slope protection along Qinghai-Tibet Highway are presented in this paper. The trials were carried out simultaneously at 5 sites in Qinghai-Tibet Plateau from 2000 to 2002. Altitudes at the experimental sites range between (4 240) m and (5 040) m. 4 sites are in permafrost area, and 1 site is in seasonally frozen ground. According to the trials of slope protection, vegetation is preferred to protect slopes along Qinghai-Tibet Highway. Road-GoodR, a chemical stabilizer, is proved as a good material for slope protection, and soil engineering system, combined with vegetative component and grade stabilization structures is proved as the best slope protection measure in these areas. The results showed that high-altitude areas at an altitude lower than (5 040) m, annual average temperatures higher than (-5.6) ℃ and annual rainfall more than 262\^2 mm, slopes can be protected using vegetative components.\;Trials for plant species selection proved that cold resistant grasses, Elymus nutans and Elymus sibiricus can be used for vegetation recovery along Qinghai-Tibet Highway. The results demonstrated that high-altitude areas at an altitude lower than (5 040) m, annual average temperatures higher than (-5.6) ℃ and annual rainfall more than 262\^2 mm, could be replanted. Hydroseeding proved to be a good planting technique, and mulch materials benefited vegetation recovery in such area.\;The experiment also proved that planting could improve slope stability, protect the ecological environment, and improve the roadside landscape. 展开更多
关键词 Qinghai-Tibet HIGHWAY SLOPE PROTECTION PERMAFROST VEGETATION PROTECTION engineering PROTECTION combi
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Energy Management System Implementation Guidelines for Iron and Steel Industry
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作者 蔡震纲 桂其林 张娣 《China Standardization》 2014年第2期40-44,共5页
The iron and steel industry generally features the characteristics of large volume of energy consumption, multiple sorts of energy medium, complex secondary conversion, more recyclable extra energy, and the energy man... The iron and steel industry generally features the characteristics of large volume of energy consumption, multiple sorts of energy medium, complex secondary conversion, more recyclable extra energy, and the energy management of the field may involve the entire personnel, process and system, covering all links from designing, purchasing, energy storage, processing and conversion, distribution, energy use and extra energy recycling. The implementation guidelines summarizes the energy management experience and results and provide a systematic approach for the implementation of GB/T 23331-2012 and GB/T 29456-2012, sharing svstematic instructions and suggestions for the implementing paths and methods of creating, implementing, maintaining and improving the energy management system (EnMS) at the enterprise level. 展开更多
关键词 iron and steel industry energy management implementation guidance
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