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Yutao Wang Lars Hansson Nan Sha Yanqiang Ding Renqing Wang Jian Liu 《Stochastic Environmental Research and Risk Assessment (SERRA)》2013,27(5):1231-1238
Road transportation has attracted extensive attention throughout the world because of its high energy demands and numerous externalities. Sustainable road transportation has thus become a great challenge for politicians and decision-makers all over the world. There have been a series of studies indicating that appropriate pricing of fuel can be both effective and efficient for reducing overconsumption of transport fuel. However, relatively little research has been done on fuel price approaches in developing country contexts. For a country like China, where road traffic today is growing more than in other countries, there is a strategic interest to do more economic analyses of fair and efficient pricing of fuel. In this study, we present a strategic assessment of fuel pricing in energy conservation and CO2 reduction from road transportation in China, both in a retrospective and a prospective perspective. First of all, the correlation between fuel price and road transport gasoline demand, based upon data from 1995 to 2007, was examined with an econometric model. Secondly, on basis of the elasticity model, the potential reductions with respect to fuel demand and Green House Gas (GHG) emissions as a consequence of a strategic fuel tax implementation in China were examined up to 2030. The results indicate that such strategic fuel taxation can play a considerable role in steering the growth of road transport gasoline demand, and thus also Chinese GHG emissions. 相似文献
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介绍了由核工业北京地质研究院自主研制的一型可用于铀矿勘查和开采领域的CS404小口径超声成像测井探管,其直径Φ40 mm、换能器工作频率为1.2 MHz、方位精度±1°、单圈成像扫描点数为180点、测井速度2 m/min时纵向分辨率为6.67 mm。在探管研制实现的基础上,进行了该型探管与QL40探管在室内模型和相山铀矿田CUSD1科学钻孔的对比测量试验,结果表明:CS404小口径超声成像测井探管声幅成像与时差成像对比明显、成像效果清晰,系统实现性能指标及成像结果均达到国外先进进口设备水平,能够为铀矿勘查和开采中的裂隙、破碎带识别以及产状提取提供一种全新的技术手段。 相似文献
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对Savage走滑位移公式加以改进,使其在反映走滑断层特征的基础上包含断层的倾角信息,体现断层倾角对地表位移的影响。当断层不是直立时,结论如下:1)震间形变曲线的中心不在断层出露地表处,而在断层闭锁与滑动分界线在地表的投影处|2)断层倾角δ、断层闭锁深度d之间存在几何关系:tanδ=d/doffset|3)由于同震沿断层面破裂,其位置与震间形变曲线中心不一致,导致同震时上下盘位移不对称。此改进同样适用于倾滑断层。 相似文献
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本文对龙门山断裂带南段GPS位移时间序列进行了欧拉基准转换、最小二乘配置插值和滤波分析等数据后处理,并利用块体刚性一弹塑性运动一应变模型计算了龙门山南段各区域应变参数时间序列。结合各站点位移时间序列、速度场及各区域应变参数序列,分析发现2008年汶川M 8.0地震对龙门山南段的影响由西北至东南由大变小,引起最大变形速度达背景速度6倍,增强了隐伏断层对两侧地表影响的差异,使南段的地震危险性由北至南增加。根据龙门山南段的历史地震及构造背景,对各区域地震危险性进行了比较,发现东南侧危险性最大,历史应变的积累及汶川地震的加速影响导致了芦山地震的提前发生和破裂断层的左旋错动。汶川地震对较远的鲜水河断裂南段也有持续两年的应力微释放影响,但其远不及川滇块体的应力压缩作用。 相似文献
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In this paper, we analyze the crustal movements, strain field changes and large scale dynamic characteristics of horizontal deformation before the Wenchuan earthquake (M_S=8.0) using GPS data obtained from the Crustal Movement Observation Network of China. The following issues are discussed. First, the strain fields of the Longmenshan fault zone located at the epicenter show slow accumulation, because of the tectonic dynamics process subjected to the eastward movement of the Bayan Har block. Second, the different movements between the Longmenshan fault and South China block are smaller than the errors of GPS observation. Third, the high value of compressive strain (2004~2007) is located at the epicenter, which shows that the local squeezing action is stronger than before. Fourth, the data from GPS reference stations in the Chinese Mainland show that crustal shortening is faster than before in the north-eastern direction, which is part of the background of the local tectonic dynamics increase in the Longmenshan fault zone. 相似文献
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����GPS�����о���ɽ-���������˶�״̬ 总被引:1,自引:0,他引:1
???????????1999??2007???GPS?????????????????????????????????????????????β??λ????????????????????У?1999??2001???????????????????м??????????????????????????????????????????1.0 mm/a???????????????1.35 mm/a;2004??2007??????????????????????0.04??1.59 mm/a???????????????????????2001??2004??????????????????????????????3?????ξ?????????????????????????????0.7??1.55 mm/a?????????????????????????????1.0 mm/a?? 相似文献
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张渤带洞体应变参数解算及结果分析 总被引:3,自引:1,他引:2
采用张渤带2002年以来的洞体应变观测资料,首先利用Venedikov调和分析方法计算带内各个台站洞体应变测项的潮汐因子和相位滞后,并以潮汐因子的稳定性对观测资料进行了质量评价.其后,以怀来台伸缩仪为例讨论了3分量和2分量观测解算平面应变参数的模型及其适用性,结果表明二者的相关系数在0.9以上.在此基础上,选取张渤带上资料较稳定的16个洞体应变台站资料进行了应变参数时间序列计算,并对华北M5.0地震前应变参数同步变化现象进行了总结.最后对比了洞体应变与GPS应变的差异,并分析了可能的原因. 相似文献