共查询到20条相似文献,搜索用时 31 毫秒
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<正>2010年2月5日,丰田公司决定在日美两大市场召回刹车系统出现问题的混合动力汽车普锐斯,预计总量为27万辆。这是丰田公司继2009年底的脚垫门和2010年1月的踏板门后,再次卷入全球范围的大规模召回。分析认为,丰田公司陷入的系列召回门,将从多方面对全球汽车工业产生深远影响,也对我国车市具有现实的警示效应。 相似文献
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秦馨菱院士是我十分钦佩的一位老师。1997年5月,我收到秦馨菱院士寄来的一封信,信中附有许多黑白照片,照片拍的是太阳穿过树叶的缝隙,投射在地上形成的许许多多的太阳小光点。如果把树叶的缝隙看成是很小的针孔,按照针孔成像的原理,圆圆的太阳在地上形成的小光点也都是圆圆的。秦馨菱院士寄来照片中地面的小光点都不是圆的, 相似文献
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Webb P 《Disasters》1993,17(1):33-47
In this article I examine the impact of drought on farm households in Ethiopia and their response to crisis conditions. I ask whether every household in a community is equally affected by drought and what households do to mitigate the effects of drought and associated food insecurity. Information on production, income and food consumption is disaggregated by agroecological zone (highland and lowland), and by socioeconomic strata (relatively wealthy versus poor). Such detailed analysis permits an improved understanding of why the poor are much more vulnerable than the wealthy to drought and associated famines and why they need to be more effectively targeted by relief and development interventions. In a world of limited public resources for crisis intervention, such understanding is crucial to the design of improved policies and projects for reaching people most at risk. 相似文献
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2008年10月6日,这一天是西藏当雄县人民难以忘怀的日子,一场没有任何预兆的里氏6.6级地震灾难降临到西藏中部大地. 16时30分,随着"轰隆"一声巨响,天旋地转、山崩地陷、大地颤抖、房屋摇晃,顷刻间,地震造成了9人死亡,14人重伤,46人轻伤,倒损房屋1931户、约6500间,有4万余人有家不能归.当雄县格达乡的羊易村普遍受灾(153户、899人),房屋倒平、水电停供、通信中断,基础设施严重损毁,水池水塘坝体的坝间开裂,坝坡渗漏,水渠开裂,地震造成直接经济损失达4.1亿余元. 相似文献
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《Environmental Hazards》2013,12(3-4):184-199
This paper examines the relationship between national disaster response authorities and the international humanitarian community through case studies in three countries where it is generally agreed that good working relations exist. It seeks to understand the common phenomena which led to those good relations. The paper takes as its premise that the international humanitarian aid community, bruised by its experience in non-functioning and predatory states, has developed an unhelpful aversion to cooperation with, and working through, local government. It posits that in a future with climate change, disasters will be more frequent and this requires a necessary shift, on the part of international agencies and local government from seeing disaster response as exceptional and interventionist to viewing it as a standard part of sovereign duty and normalcy. The study highlights a number of common features across the three case studies which shed light on why disaster response has been transformed in the study countries. 相似文献
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2007年8月15日(当地时间),位于西太平洋的南美国家秘鲁发生了7.8级强烈地震,震中位于距伊卡省上钦查市140公里处的太平洋海域,震源深度为40公里。这是数十年来南美地区发生的最强地震。强震还带来小 相似文献
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目前国内外对混凝土结构的抗火性能评估几乎都是针对独立构件开展的,很少考虑相邻构件之间的相互约束作用。实际火灾调查与明火试验表明,结构中构件的火灾行为与独立构件有着较明显的差别。本文开展了具有端部约束的碳纤维布加固混凝土梁的高温反应分析,揭示了轴向/转动约束刚度比、梁截面尺寸、跨度、荷载比、加固量、配筋率、保护层厚度和防火涂料厚度等参数对ISO834标准升温作用下约束加固梁的梁端弯矩的影响规律。在此基础上,给出了高温下约束加固梁的梁端弯矩实用计算方法。研究表明:①随着升温时间的增加,约束加固梁的梁端弯矩总体呈现先逐渐增大而后渐趋平缓的趋势;②防火保护(即使防火涂料厚度只有10mm)对高温下约束加固梁的梁端弯矩影响显著。 相似文献