新型双船起重拆除平台试验研究   总被引：1，自引：1，他引：0  

李巍  胡智焕  李欣  孙浩  WANG Andy  田新亮  张卫东 《海洋工程》2020,38(1):30-41

拆除大型海上结构物是一项非常复杂且充满挑战的工程。现提出一种新型海上平台拆除方案,该方案利用三条半潜船来代替具有重型起重装置的单一船舶,通过两艘相同的半潜船将平台上层建筑托起,随后运至第三艘半潜船上完成平台拆除。在风浪流作用下,半潜船和平台的所处方位和运动姿态一直处于动态变化中,这对船舶调节压载的稳定性以及双船运动的同步性提出了要求。为了确保该方案的高效性和安全性,设计了一套完整的模型试验装置,包括船舶模型、平台拆卸辅助设备、六自由度运动采集与分析系统、控制系统、无线通讯系统以及测量系统。开展了相应的水池试验,试验结果验证了双船起重拆除平台方案中双船协同运输这一关键环节的可行性和安全性。  相似文献   

世界能源贸易网络的演化特征与能源竞合关系   总被引：3，自引：1，他引：3  

何则  杨宇  刘毅  金凤君 《地理科学进展》2019,38(10):1621-1632

详尽地探讨全球能源贸易网络的演化特征及国际贸易的竞合关系,可为中国能源贸易政策的制定提供科学支撑。论文运用复杂网络方法,从整体格局出发研究了世界能源贸易网络的演化特征,并重点从供给与需求两方面分析了贸易集团演化与供需大国的能源竞合关系。研究结果表明：20世纪90年代以来,世界能源贸易关系不断趋于复杂化。近年来,能源贸易主体数量基本保持稳定,当前占世界总数近80%的国家/地区均参与能源贸易;世界能源贸易网络同时具有小世界特性与无标度特性;世界能源的进出口格局已发生重塑,能源的出口重心逐渐由东亚、中东、澳洲和欧洲转向了东欧、中东、北美、澳洲和西非等地区,进口重心由东亚、西欧和澳洲向北美、东亚和西欧转移;世界能源贸易网络存在四大集团,分别是以美国为首的贸易集团、欧洲-俄罗斯等国家贸易集团、东亚-东南亚贸易集团和澳大利亚-印度-非洲贸易集团等。地理距离、制度差异、历史文化及政治关系等是贸易集团演化的重要原因;贸易集团内,核心国家间的贸易依赖存在着非对称性,能源需求国进口来源的多元化现象更为突出,东亚、东南亚市场是供给国共同争夺的对象。  相似文献   

Governmentality and the climate-development nexus: The case of the EU Global Climate Change Alliance     

《Global Environmental Change》2019

This article uses a governmentality perspective to uncover the power effects of the external climate change adaptation assistance provided by the European Union (EU) through its flagship initiative in this regard: the Global Climate Change Alliance. By drawing upon a body of literature that conceptualizes the established international architecture in this regard as rooted in power relations, this article opens up our current perspective of the EU as an international climate actor. An analysis of policy documents and targeted semi-structured interviews reveals that the EU discursively emphasizes the responsibility of partner countries to manage risk and become ‘resilient’ to climate impacts, while downplaying the transformative potential of adaptation for development. We see this dynamic further reflected in GCCA policy techniques, which promote the production of quantified and depoliticized knowledge on adaptation. This in its turn further guides the allocation of GCCA support and is instrumentalized in order to establish a stable identity for the organization and reproduce the EU as a climate leader in this regard.  相似文献   

世博效应对长三角一体化制度合作影响研究     

张岩 《世界地理研究》2012,(2):105-111

长江三角洲地区是我国区域合作开始较早的地区,2010年上海世博会的举办,更加速了长三角地区一体化的进程。本文在回顾上海世博会之前长三角区域合作基本历程的基础上,总结上海世博会筹办与举办期间的长三角制度合作新进展,分析世博效应对长三角一体化制度合作的影响,提出借助世博效应进一步加强长三角一体化制度合作的发展路径与对策。  相似文献   

Expert System for Statistical Prediction of Mineral Deposits on Middle and Large Scales     

Zhao Pengda Hu Guangdao Li XinzhongFaculty of Mineral Resources  China University of Geosciences  Wuhan 《中国地质大学学报(英文版)》1995,(2)

The expert system for statistical prediction of mineral deposits on middle and large scales takes the system of scientific exploration theories, criteria and methods proposed by Professor Zhao Pengda as the field expert knowledge. At present the developed system focuses on two aspects: synthetic exploration and quantitative exploration. Among the three basic theories for the prediction of deposits, it highlights the applications of seeking anomaly theory. This system is characteristic in the determination of geological background, the study of geological anomalies and the delineation of geological background, the study of geological anomalies and the delineation of mineralization anomalies. The system combines closely the knowledge base, method base and database ,integrates the input and output information of multi-sources and multi-variables, data , graphs and imagine processing system and inquiring system as a whole . So the system can meet in general all kinds of demands in statistical prediction of m  相似文献   

Ethiopia and the Eastern Nile Basin   总被引：1，自引：0，他引：1  

Yacob Arsano  Imeru Tamrat 《Aquatic Sciences - Research Across Boundaries》2005,67(1):15-27

  相似文献   

Boundaries and transborder relations,or the hole in the prison wall: On the necessity of superfluous limits and boundaries     

Walter Leimgruber 《GeoJournal》2005,64(3):239-248

Boundaries can be seen as barriers or as places of contact. It has been suggested that we are “prisoners of borders”, of all kinds of borders (political, religious, social, cultural, linguistic etc.). While this statement appears to be somewhat exaggerated, it holds some truth. Boundaries are elements in spatial organization, and they influence daily life in many ways (not only for people living right along them). The paper addresses the question if we must call ourselves “prisoners” or if we simply have to live with all kinds of borders. Departing from theoretical observations, the paper discusses the various aspects boundaries assume in the European context before looking at a few concrete Swiss examples. They reveal that even regions at a certain distance of the state border will feel its effects (the case of Zurich airport), but the most important benefit can been drawn by people living in the border area itself (through price differences between the two countries, as exemplified by the Swiss-Italian border). There may be asymmetry on state borders, but this asymmetry can also swing around: the advantages often lie on both sides. The paper concludes by pointing to the persistence of the boundary concept. They are a necessity for the organization of space and society, but they are not absolute. There are always holes in these prison walls, and the examples where boundaries were impermeable are probably rare.  相似文献   

俄罗斯和中亚五国资源开发现状与潜力分析     

吉力力·阿不都外力  杨兆萍 《干旱区地理》2006,29(4):588-597

俄罗斯和中亚五国地域辽阔,土地、森林、水、能源等自然资源丰富,尤其是有色金属矿藏,种类配套齐全,在世界都占有重要地位。俄罗斯和中亚五国与中国在地缘、历史和文化等多方面有着悠久的历史,具有资源开发、经贸合作和科技交流的国际背景和有利条件。俄罗斯和中亚五国十分重视资源开发和原料出口,向主要经济合作伙伴推销资源产品,并很快引起许多国家,尤其是经济发展较快国家的重视。在未来的几年中,中国与俄罗斯和中亚五国在土地、电力、建材、机械、畜牧业、信息、交通等领域都有着广阔的合作空间。可以说,中国与俄罗斯和中亚五国及其辐射地区市场潜力巨大,待开发的领域空白点较多,特别是里海、西伯利亚的石油和天然气,是21世纪全球最具能源开发前景的地区,而能源勘探与开采领域则是我们未来需要重点发展合作的领域。但是,中亚国家的原料型经济倾向,参与世界经济一体化程度不足,生产和社会基础薄弱,这些问题都阻碍着中亚国家的可持续发展。特别是中亚国家的加工工业和轻工业相对落后,大部分日用消费品依靠进口。这是我国在中亚区域经济合作中充分发挥市场优势、加工业优势的有利条件。所以,资源和经济技术的互补性,对发展中国与中亚五国和俄罗斯双边的区域经济合作都将起到积极作用。展望21世纪的俄罗斯、中亚五国与中国的经贸合作关系,根据俄罗斯和中亚各国资源状况实地调查和统计资料等,对区域资源开发现状与潜力进行了分析,对共同面对的问题,合作的基础和条件及合作前景,都进行了探讨。  相似文献   

哈萨克斯坦地震地下流体监测的现状   总被引：2，自引：0，他引：2  

高小其  魏若平  鲁娜 《国际地震动态》2006,(3):19-23

首先回顾了在过去的近40年中,哈萨克斯坦地震地下流体观测经历了“初期建设、系统清理、政策调整和优化提高”4个阶段,逐步形成了目前与中国地震局北京地区地震地下流体监测网相当的规模;其次,简述了哈方流体监测台网的分布情况,并就其观测项目、使用仪器及台站布设密度等现状问题和中国新疆地震局进行了对比分析。  相似文献   

图们江多国经济合作开发区形成条件初探   总被引：2，自引：0，他引：2  

陈长春  杨友孝 《地理研究》1997,16(3):89-94

文中以东北亚区域合作为背景,以区域极化发展理论为指导,对图们江多国合作开发区形成条件进行分析和讨论,提出了该跨国新型开发区赖以产生和发展的外部动因与内在潜力,以对国内外积极参与图们江地区的合作开发提供参考依据。  相似文献