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1.
宋祥文 《福建地质》2001,20(2):57-69
这次会议是进入新世纪我局第一次工作会议,是一次总结过去,谋划未来的重要会议,开好这次会议对我局在新世纪实现新发展有着十分重要的意义.会议的主要内容是认真学习温家宝副总理的重要讲话精神,总结回顾"九五"地矿工作改革发展的基本情况,讨论修改我局"十五"改革发展纲要、"十五"前三年经济责任制考核办法和精神文明建设考核办法,安排部署2001年工作.下面我代表局党组作工作报告.  相似文献   
2.
The MW6.6 Arketao earthquake occurred on November 25, 2016 in Muji Basin of the Kongur extensional system in the eastern Pamir. The region is the Pamir tectonic knot, one of the two structural knots where the India plate collides with the Eurasian plate. This region is one of the most active areas in mainland China. The seismogenic structure of the earthquake is preliminarily determined as the Muji dextral-slip fault which locates in the north of Kongur extensional system. Based on field surveys of seismic geological hazard, and combined with the characteristics of high altitude area and the focal mechanism solution, this paper summarizes the associated distribution and development characteristics of sandy soil liquefaction, ground fissures, collapse, and landslide. There are 2 macroscopic epicenters of the earthquake, that is, Weirima village and Bulake village. There are a lot of geological hazards distributed in the macroscopic epicenters. Sand liquefaction is mainly distributed in the south of Kalaarte River, and area of sand liquefaction is 1 000m2. The liquefaction material gushed along the mouth of springs and ground fissures, because of the frozen soil below the surface. More than 60% of soil liquefactions are formed in the mouth of springs. According to the trenching, these liquefactions occurred in 1.8 meters underground in the gray green silty clay and silty sand layers. The ground fissures are mainly caused by brittle failure, and the deformation of upper frozen soil layer is caused by the deformation of lower soil layer. The ground fissures at Weirima village are distributed in a chessboard-like pattern in the flood plain of Kalaarte River. In the Bulake village, the main movement features of the ground fissure are tension and sinistral slip, and the directions of ground fissures are 90°~135°. The collapse and landslide are one of the important geological disasters in the disaster area. The rolling stones falling in landslide blocked the roads and smashed the wire rods, and the biggest rolling stone is 4 meters in length. We only found a small landslide in the earthquake area, but there are a large number of unstable slopes and potential landslides in the surroundings. The ground fissures associated with sand liquefaction are an important cause of serious damage to the buildings.  相似文献   
3.
利用改进的自动经验基线校正方法SMBLOC,对2016年8月24日意大利佩鲁贾MW 6.2级地震震中周围约60 km内的近场强震记录进行基线校正并尝试给出同震位移场,与GPS观测结果进行对比分析,分别独立和联合两种资料反演震源滑动模型,并根据震源模型进一步给出全空间预测位移场分布.研究结果表明:(1)两种不同的资料给出的水平位移场幅值均为cm级,且均表明断层的错动以正断为主.(2)两种同震位移场分别独立和联合反演所得的震源静态滑动范围基本一致,最大滑动均发生在震中东北侧,强震模型表现出明显的双事件特征,较大滑动分布在震中东北侧和东南侧,GPS模型在震中东南侧的滑动相对较小,其双事件特征不明显.两种模型的最大滑动量分别为0.96 m和0.86 m,较为一致,反演的矩震级均在MW 6.3左右.(3)根据震源滑动模型计算所得的佩鲁贾地震全空间预测的水平同震位移场中最大位移分布区域与震后报告中受灾严重的地区基本一致.表明在一定的条件下,利用SMBLOC方法解算震级较小的MW 6.0左右地震强震记录的同震位移场,并反演震源滑动模型具有一定的可行性,且其同震位移场和滑动模型可为震后灾害快速评估、救援力量分配、余震趋势判定等快速应急响应工作提供参考依据.  相似文献   
4.
Many Chinese people leave big cities for family reunions during the Chinese New Year(CNY), which is the most important public holiday in China. However, how modern mass human migration during the CNY holiday affects the urban heat island(UHI) is still unknown. Here, the authors investigate the role of modern human migration for the UHI effects during the CNY holiday for the period of 1992–2006 in Harbin City, Northeast China. The results show that during the CNY week, the UHI effects expressed as daily mean, maximum, and minimum temperature differences between urban and rural stations averaged over the period of 1992–2006 are 0.65°C(43%), 0.31°C(48%), and 1.14°C(71%) lower than during the background period(four weeks before and four weeks after the CNY week), respectively. Our findings identify previously unknown impacts of modern mass human migration on the UHI effects based on a case study in Harbin City.  相似文献   
5.
The surface ruptures produced by the 2016 MW7.8 Karkoura earthquake, New Zealand are distributed in a belt with~170km long and~35km wide, trending generally in the NE-SW direction. There are at least 12 faults on which meter-scale displacements are identified and they were formed across two distinct seismotectonic provinces with fundamental different characteristics(Hamling et al., 2017; Litchfield et al., 2017). Although the trending directions of the seismic surface ruptures vary greatly at different locations, the ruptured faults can be generally divided into two groups with the NE to NEE direction and the NNW to N direction, respectively. The faults in the NNW-near NS direction are nearly parallel with 40~50km apart and featured by reverse movement with the maximum displacement of 5~6m. The faults in the NE-NNE direction, with the maximum of 25~30km apart are not continuous and featured by the dextral strike slip with the largest displacement of 10~12m. Even if some faults along the NE-NEE direction are end to end connected, their strikes differ by about 30°. The combination styles of the strike-slip fault surface ruptures along the NE-NEE direction can be merged into 3 categories, including en-echelon, bifurcation and parallel patterns. The scales of the fault surface ruptures with the same structural style could be obviously different in different areas, which results in significant changes in the widths of deformation zone, from tens of meters to hundreds of meters. En-echelon distributed surface rupture(section)can appear as a combination belt of meter-scale to dozens of meter-scale shear fracture with bulge and compressional shear fractures, and also can be characterized by the combination of the left-step en-echelon tensile shear fractures with a length of more than one hundred meters. The step-overs between surface rupture sections are clearly different in sizes, which can be dozens of meters, hundreds of meters to several kilometers. The spacing between parallel surface ruptures can be several meters, dozens of meters to several kilometers. Besides, as one of the prominent characteristics, the seismic surface ruptures caused by the Karkoura earthquake broke through the known distribution pattern of active faults. The surface ruptures can occur either on the previously thought inactive or unmapped faults, or break through the distribution range of previously realized active faults in the striking or lateral direction. The basic features about the distribution and widths of the surface ruptures induced by the 2016 MW7.8 Karkoura earthquake, New Zealand presented in this paper might be helpful for understanding some seismic problems such as complex corresponding relationship between the active faults and the deep seismogenic structure, and the necessary measurements for engineering crossing active faults.  相似文献   
6.
火山活动与天文周期   总被引:3,自引:0,他引:3  
  相似文献   
7.
多目标的地质大调查 ——21世纪勘查地球化学的战略选择   总被引:12,自引:0,他引:12  
奚小环 《物探与化探》2007,31(4):283-288
21世纪勘查地球化学面临发展问题.2001~2005年勘查地球化学以国家其基础性公益性地质工作为主导,以经济社会发展需求为动力,以资源与环境并重为方针,实施多目标的地质大调查,取得一系列重要成果,标志勘查地球化学进入全面发展阶段.这是勘查地球化学的战略选择.在现代科学技术取得最新成就起点上,构建理论体系、方法体系和质量体系,在各项工作中采取科学态度和积极有效措施,推动勘查地球化学不断达到新的高度.  相似文献   
8.
本文着重介绍了成都市的地震监测工作状况。在“九五”、“十五”期间,成都市加大了对地震监测基础设施建设的投入,先后建成了成都市数字遥测地震台网(含一期工程、二期工程)和成都市数字电磁波观测台网,改造了成都市地震监测中心。根据成都市现有地震监(观)测能力,“十一五”期间,将继续加强成都市的地震监(观)测工作,从防震减灾的角度提升成都市的综合竞争力。  相似文献   
9.
极地气象与全球变化   总被引:1,自引:0,他引:1  
目前,全球变化加快,极地地区变化尤为突出,这对区域或全球的社会、经济和生态系统都将产生显著的影响。最明显的证据是极区的冰川和冰雪范围持续减少,永久冻土在消融和消失,北冰洋海冰范围和厚度减小。极地环境的变化跟地球其它区域的变化息息相关,如臭氧洞的形成与来自低纬度的污染物积聚有关。极地地区的科学研究非常重要,不断地给我们提出新的科学挑战。极地冰盖下和大面积海冰下存在着大量的未知领域,许多极地研究的前沿问题实际上存在于传统学科的交叉领域。因此,世界气象组织(WMO)和国际科联(ICSU)共同发起并于2007年3月1日启动实施2007-2008年国际极地年(IPY),旨在为极地气象学、海洋学、冰川和水文学等领域的科学研究和观测做出贡献,有助于发展更精确的海一冰一大气环流模式,进一步提高对天气预报和气候变化的预测和预估水平。  相似文献   
10.
旅游节庆品牌认知是衡量游客认识和理解节庆品牌内涵及价值的标准,城市旅游节庆的主题也体现了城市意象的相关元素。在分析台北市地理区位、社会文化和城市功能等属性后,明确了台北具有"生态、创意、旅游"三大城市意象。以台北101跨年晚会为例,研究旅游节庆品牌认知对游客支持意愿的影响,分析旅游节庆对推广城市意象的作用。研究结果表明:品牌知名度、品牌联想、感知质量、感知价值、品牌信任、品牌忠诚度是影响游客支持意愿的六大驱动因素;节庆品牌认知对支持意愿的影响存在年龄、学历和居住地三方面的群体差异性;基于城市意象特征塑造旅游节庆品牌有利于推广城市意象,并延长节庆品牌的生命周期。  相似文献   
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