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低碳铝工业:新时代的要求 总被引:1,自引:0,他引:1
向低碳经济转型是中国的必由之路。中国铝工业是二氧化碳排放的大户,2008年约占全球总排放量的三分之一,这就成为世人关注的焦点。中国铝工业必须应对低碳时代的挑战,勇于承担低碳经济的责任。 相似文献
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温室气体和钢铁工业减排措施 总被引:5,自引:0,他引:5
由温室气体引起的全球气候变化已成为国际社会关注的焦点。2005年2月16日正式生效的《京都议定书》虽暂时对中国无直接的压力,但中国的温室气体排放总量仅次于美国,居世界第2位,居发展中国家的首位,这使中国在相关国际谈判中面临很大压力。2001年中国人均二氧化碳排放量为2.43 t,低于世界人均水平(3.88 t),但温室气体排放呈急剧增长趋势。中国钢铁行业的二氧化碳排放量约占发展中国家钢铁工业总排放量的30%,在国内工业二氧化碳排放量在工业二氧化碳排放中仅次于电力、建材(水泥),居第3位。介绍了相关的国际动态和对我国钢铁行业温室气体排放现状分析和减排措施的研究工作。 相似文献
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一、概况随着世界经济不断发展,工业生产能力增长,污染物的排放量也随之迅猛增长,工业污染对人类生活的危害也随之加重,气体污染物是主要污染物之一。工业炉窑排烟中 相似文献
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显微维氏硬度测量不确定度评定 总被引:1,自引:0,他引:1
对显微维氏硬度测量不确定度进行评定,建立了不确定度计算的数学模型,确定了影响实验结果的各项因素,计算出了各因素的标准不确定度,得出结果的扩展不确定度,并给出最终测量结果的表达式。 相似文献
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G Steinbach 《Canadian Metallurgical Quarterly》1997,110(7-8):247-250
Totally negative results of epidemiological investigation of random samples do not prove the absence of the infection as the pathogen may be restricted to only a few animals in the herd for a long time. The statement "absence of infection" is critical for such situations. The question is raised, whether the statement "absence of infection" should be generally avoided. Classification of herds and flocks according to the prevalence of the pathogen would be more valid for the implementation of control measures. 相似文献
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Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies. 相似文献
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鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美". 相似文献
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针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。 相似文献
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2008年中国电解金属锰发展态势浅析 总被引:1,自引:0,他引:1
对中国电解金属锰发展的市场态势、价格行情以及原材料供应情况作了初步分析,提出我国电解金属锰行业挑战与机遇并存,只要抓住机遇、迎接挑战、夯实基础、科技创新,电解金属锰行业前景将会更加光明。 相似文献
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Abrahamson David; Schludermann Shirin; Schludermann Eduard 《Canadian Metallurgical Quarterly》1973,41(2):320
Employed 120 male and 113 female undergraduates in a replication of H. L. Mirels's (see record 1970-10386-001) study which found 2 factors in analyzing responses to 23 items on Rotter's Internal-External Control Scale. The same polar dimensions of "luck" as the arbiter of life events as opposed to personal control were found as well as a 2nd dimension of degree of control over political and social institutions. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献