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排序方式: 共有157条查询结果,搜索用时 15 毫秒
81.
Graeme Hoyle 《Resources, Conservation and Recycling》1995,15(3-4)
The purpose of this paper is to review, and draw attention to, issues raised by the recycling of wrought aluminium from motor cars, even though the time horizon for significant arisings of such aluminium scrap is in the order of 20 years from now. Recycling of specific grades of wrought aluminium will be viable only when a means of positively identifying different types of scrap is available. A solution must be reliable, rapid, and low-cost; probably used in conjunction with a vehicle shredder. Such a system of identification will eliminate the need for costly hand-dismantling and segregation. Simple segregation of cast and wrought alloy will, however, be essential when wrought aluminium from car bodies dominates the scrap arisings. Such segregation will produce two high-value scrap products. The first of which will be similar to the A380 casting alloy specification, maintaining the current supply of this scrap, and the second will be a composite of wrought alloys. These issues are relevant to the aluminium scrap industry, which will have to accommodate future changes in the composition of the scrap it receives, and the motor industry, which may adopt in-house recycling of wrought alloy in order to offset the high purchase cost of aluminium. 相似文献
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在用车燃油消耗及排放污染全部发生在道路交通过程中,尤其集中在城市道路交通。介绍了昆明市城市交通管理工作中采取的节能减排措施。 相似文献
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Achim Lohmeyer Wolfgang Baechlin Matthias Ketzel 《Environmental monitoring and assessment》2000,65(1-2):381-387
The draft of the German guideline to calculate automobile exhaust dispersion is explained. It contains a two-stage-system: For first quick estimates the guideline contains the simple models MLuS and STREET. In case these models are not applicable or their results shows concentration levels close to the air quality standards, the more complex models PROKAS_V and MISKAM are recommended. PROKAS_V is a Gaussian plume model, MISKAM is a 3-dimensional microscale non hydrostatic flow model for built-up areas with an Eulerian dispersion model. The guideline comprises cases in rural areas without or with few adjacent buildings as well as urban areas with buildings near the roads. The contribution gives information about the models, typical results and some of the problems showing up presently. 相似文献
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浅谈加油加气站的防雷防静电安全检测 总被引:1,自引:1,他引:0
本文根据相关技术标准和多年来对加油加气站的防雷防静电安全检测经验,总结归纳了加油加气站防雷防静电安全检测技术要点,针对检测准备工作、检测程序、检测项目、检测要求及方法、检测数据的整理及有关注意事项等分别进行了阐述。 相似文献
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