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1.
    
We used hydrologic models to explore the potential linkages between oil‐field brine reinjection and increases in earthquake frequency (up to Md 3.26) in southeastern New Mexico and to assess different injection management scenarios aimed at reducing the risk of triggered seismicity. Our analysis focuses on saline water reinjection into the basal Ellenburger Group beneath the Dagger Draw Oil field, Permian Basin. Increased seismic frequency (>Md 2) began in 2001, 5 years after peak injection, at an average depth of 11 km within the basement 15 km to the west of the reinjection wells. We considered several scenarios including assigning an effective or bulk permeability value to the crystalline basement, including a conductive fault zone surrounded by tighter crystalline basement rocks, and allowing permeability to decay with depth. We initially adopted a 7 m (0.07 MPa) head increase as the threshold for triggered seismicity. Only two scenarios produced excess heads of 7m five years after peak injection. In the first, a hydraulic diffusivity of 0.1 m2 s?1 was assigned to the crystalline basement. In the second, a hydraulic diffusivity of 0.3 m2 s?1 was assigned to a conductive fault zone. If we had considered a wider range of threshold excess heads to be between 1 and 60 m, then the range of acceptable hydraulic diffusivities would have increased (between 0.1–0.01 m2 s?1 and 1–0.1 m2 s?1 for the bulk and fault zone scenarios, respectively). A permeability–depth decay model would have also satisfied the 5‐year time lag criterion. We also tested several injection management scenarios including redistributing injection volumes between various wells and lowering the total volume of injected fluids. Scenarios that reduced computed excess heads by over 50% within the crystalline basement resulted from reducing the total volume of reinjected fluids by a factor of 2 or more.  相似文献   
2.
This article draws on French and British archival sources to rethink the history of Britain's 1918--1920 occupation of the Caucasus. The extant historiography casts London as eager to reinvigorate the region's oil exports in order to buoy its own supplies, but this article suggests that various elements within and close to the British administration sought to obstruct oil exports. Preventing Caucasus oil from reaching global markets seems to have helped parts of the British administration reach their aims during negotiations with the French government and Royal Dutch Shell. It also improved the viability of the Anglo-Persian Oil Company by denying valuable oil supplies to rival firms. Acknowledging the British oil interests that steered state policies during this period allows a richer story to unfold, one that demonstrates how imperial power in the wake of the Great War could be brought to serve the aims of, and even adopt the methods of, transnational oil companies operating in an emerging global fuel market.  相似文献   
3.
The article focuses on spatializing struggles in relation to Niger's new oil infrastructure and shows how it turned public and political. Two different but interconnected perspectives are employed: first, a historical perspective illuminates how economic theories of growth, visions of industrialization, desires for energy autonomy, political projects for constitutional change and infrastructural developments in neighbouring countries were, from the very beginning, entangled in Niger's oil assemblage. These entanglements made the petro-infrastructure political even before it had materialized. Second, by focusing ethnographically on the spatial dispersion of the petro-infrastructure over different administrative regions in Niger, the article examines territorializing processes in which temporally and spatially separated histories of marginalization were stitched together to reconfigure collective identities. These dynamics go beyond existing explanations of resource curse theories, showing how oil acts as a catalyst that accelerates pre-existing dynamics, slowly transforming the socio-political configuration in which it operates in the process.  相似文献   
4.
古代文物丝织品霉斑清除的研究   总被引:2,自引:1,他引:2  
为了解决故宫博物院库房藏品中部分古代丝织品出现生霉的问题,从对库藏纺织品的病害现状调研入手,了解生霉文物本身的质地、染料成分、以及霉斑形成的环境状况,利用改进的改良型超声清洗方法和弱酸化水溶液,对多件霉变石青色丝织品进行了清洗处理,获得了满意的效果,此法可以在今后的工作中加以推广。  相似文献   
5.
油画颜料层裂纹是一种常见的病害类型,严重的裂纹会影响作品的视觉效果。裂纹修复所采取的措施应以缓解病害,延续寿命为目标,避免不当修复对其文物价值的改变。本研究通过红外光谱和便携式X荧光能谱分析,初步确定了裂纹产生的原因与材料技法和机械作用力有关,长期的温湿度波动则是最终形成老化裂纹的重要因素。对两类常见的裂纹加固方法比较后得出结论,色蜡改变了原画的光泽度和肌理层,动物胶调碳酸钙更适宜作为裂纹的填补材料。观察修复后的油画保存状况,发现经过修复的颜料层仍存在继续劣化的风险,必须维持保存环境的相对稳定,方可延长修复周期。  相似文献   
6.
本工作从应用的激光类型、激光对主要画材的影响以及清洗表面沉积物、处理老化光油、去除复绘和清洗画背等主要应用场景等层面,系统呈现了激光清洗架上绘画的研究现状,为实际应用中激光类型等工艺参数的选择提供了全面的参考,给出了典型的工作逻辑与流程,同时也指出了现有研究中的空白和不足。  相似文献   
7.
为抢救性修复保护我国著名旅法爱国女画家潘玉良众多的油画,选用欧洲的传统工艺和技法,采用与气候湿润的意大利、荷兰、日本等国家基本相似的材料,用整体托裱法等技法,并运用现代数码及电脑图片技术,对108幅油画进行修复。从列举的4个例子:《弹曼陀铃老人》、《新枝》、《南京夫子庙》、《黑白女人体》修复结果说明,修复后恢复了其原貌,效果良好,对类似工作具有示范意义。  相似文献   
8.
油画对于中国来说是一个外来的画种,经过美术史家多年的努力,它东传的时间和途径已然大致明确。但研究中还是有很多缺环。近些年来对清朝宫廷绘画实物及相关资料的发现,为欧洲油画东传的过程提供了更多的信息。本文通过对流传至今的清宫油画作品进行梳理,提出一些想法,或可补充关于"西画东渐"的叙述。  相似文献   
9.
    
ABSTRACT

Two distinct archaeological phenomena appeared between the middle of the second century BCE and the middle of the first century: the Hasmonean folded wheel-made lamp and the standing pit burial cave. Following an examination of their dating, distribution, and social significance we suggest that this material culture was characteristic of the Jews in Judaea during this time and that it reflects the creation of an ethnic identity. The fact that the Hasmonean folded wheel-made lamp and the standing pit burial cave were typical of Jews in Judea indicates that they were ethnic features of Jewish society. By these means the Jews emphasized their dissimilarity from the rest of the population. The archaic appearance of the lamps and the burial caves, which replicates the cultural characteristics of the Kingdom of Judah during the monarchic/first Temple period, indicates that Jewish society in the Hasmonean period sought to legitimize its existence through the use of its former culture and memory.  相似文献   
10.
There has been a lack of attention to the role of la sorcellerie (witchcraft) and the occult in geographical work on extraction, power and resistance, despite the ways in which these epistemologies inform conceptions of power, wealth and violence. In two towns along the Chad–Cameroon Oil Pipeline, epistemologies of la sorcellerie frame understandings and critiques of the invisible actors and processes that effect the pipeline's uneven distributions of violence, wealth and risk. Far from expunging the experience(s) of extraction by erasing the pipeline's visible traces on the landscape, the oil consortium's infrastructural and discursive erasures serve to situate the pipeline within a knowledge system that associates invisible actors and materials with evil, wrongdoing, suspicion and distrust. This article addresses (i) how the production of dispersed extractive landscapes reinforce epistemologies of witchcraft by alienating the people who live within them from networks of power in ways that provoke a mistrust and jealousy that is absorbed within families and communities and (ii) the socio-political significance of this epistemological structuring of the pipeline as a logic of resistance against hydrocarbon capitalism.  相似文献   
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