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Small Islands Create Big Disputes
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作者 Ni Yanshuo 《ChinAfrica》 2012年第11期16-17,共2页
The Japanese Government's move to "purchase" the disputed Diaoyu Islands fuels tensions between China and Japan
关键词 small islands Create Big Disputes
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Research on sustainable development of small islands in China─taking 12 island counties for examples
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作者 ZHANG Yao-guang(Liaoning Normal University, Dalian 116029, China) 《Journal of Geographical Sciences》 SCIE CSCD 1999年第1期51-58,共8页
Islands serve as the basis for marine exploitation,and the sustainable development of islands and that of marine exploitation are closely inter-connected. This article inquires into problems on the sustainable develop... Islands serve as the basis for marine exploitation,and the sustainable development of islands and that of marine exploitation are closely inter-connected. This article inquires into problems on the sustainable development of small islands by taking 12 island counties in China for examples. 展开更多
关键词 small coastal islands marine exploitation sustainable development
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Development Trend of Small Island District in Tropical Monsoon Region (Case Study: Ly Son and Phu Quy Island Districts, Vietnam)
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作者 Hang Anh Nguyen Thi Thanh Hang Phan 《Journal of Geoscience and Environment Protection》 2020年第4期105-124,共20页
Ly Son (Quang Ngai province) and Phu Quy (Binh Thuan province) are two island districts in Vietnam that have similar natural characteristics;both are facing the issues of sustainable economic development. This researc... Ly Son (Quang Ngai province) and Phu Quy (Binh Thuan province) are two island districts in Vietnam that have similar natural characteristics;both are facing the issues of sustainable economic development. This research applied Man-Kendall model to estimate the trend of some socio-economic elements in these two island districts that have been collected during the period of 2002-2018. In general, socio-economic factors showed a tendency to increase recently. Ly Son island district has faster growth rate than that of Phu Quy because Phu Quy is farther from the mainland, more difficult to access and this island district does not own distinct local products. However, with the current development speed, Ly Son is facing several consequences such as insufficient water sources to meet the water demand and security instability due to the increasing number of visitors to the island. This research also proposed that, in order to sustainably develop the two island districts, there should be a specific structure for economic development orientation among sectors based on phased schedule. More importantly, tourism development planning should take capacity into consideration. Fishing practices should pay attention to methods and fishing equipment. Infrastructure investment for environmental protection as well as advocacy program to minimize the use of plastic bags should be done on a regular basis. 展开更多
关键词 Sustainable Development small island DISTRICTS and TROPICAL MONSOON Region
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Charting the Course for Sustainable Small Island Tourist Development
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作者 Teresa L. McKee 《Journal of Environmental Protection》 2013年第3期258-260,共3页
This article, Charting the Course for Sustainable Small Island Tourist Development, addresses sustainability criteria for small island tourist development drawing on the history of development in the last decade in th... This article, Charting the Course for Sustainable Small Island Tourist Development, addresses sustainability criteria for small island tourist development drawing on the history of development in the last decade in the Bocas del Toro archipelago of the Republic of Panama in the Caribbean Sea near the border of Costa Rica. Tax deferments for the development of vacation and resort properties spurred a boom in this island locale since the late 1980’s. Tourist Law 8 of the Panamanian constitution is referenced. Sustainability criteria of water supply and availability are suggested and outer island projects are discussed. Lessons are outlined and recommendations are made for permit qualifications that promote sustainable small island tourist development. 展开更多
关键词 SUSTAINABLE small island TOURIST DEVELOPMENT
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Toward sustainable waste management in small islands developing states: integrated waste-to-energy solutions in Maldives context
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作者 Yao Wang Alejandro Ruiz-Acevedo +3 位作者 Eemaan Rameez Vijaya Raghavan Abid Hussain Xunchang Fei 《Frontiers of Environmental Science & Engineering》 SCIE EI CSCD 2024年第2期133-148,共16页
Effective waste management is a major challenge for Small Island Developing States (SIDS) like Maldives due to limited land availability. Maldives exemplifies these issues as one of the most geographically dispersed c... Effective waste management is a major challenge for Small Island Developing States (SIDS) like Maldives due to limited land availability. Maldives exemplifies these issues as one of the most geographically dispersed countries, with a population unevenly distributed across numerous islands varying greatly in size and population density. This study provides an in-depth analysis of the unique waste management practices across different regions of Maldives in relation to its natural and socioeconomic context. Data shows Maldives has one of the highest population density and per capita waste generation among SIDS, despite its small land area and medium GDP per capita. Large disparities exist between the densely populated capital Male’ with only 5.8 km2 area generating 63% of waste and the ~194 scattered outer islands with ad hoc waste management practices. Given Male’s dense population and high calorific waste, incineration could generate up to ~30 GW/a energy and even increase Maldives’ renewable energy supply by 200%. In contrast, decentralized anaerobic digestion presents an optimal solution for outer islands to reduce waste volume while providing over 40%–100% energy supply for daily cooking in local families. This timely study delivers valuable insights into designing context-specific waste-to-energy systems and integrated waste policies tailored to Maldives’ distinct regions. The framework presented can also guide other SIDS facing similar challenges as Maldives in establishing sustainable, ecologically sound waste management strategies. 展开更多
关键词 Anaerobic digestion Waste incineration Waste management MALDIVES small island Developing States WASTE-TO-ENERGY
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A Framework for Disaster Vulnerability in a Small Island in the Southwest Pacific: A Case Study of Emae Island, Vanuatu 被引量:1
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作者 Guy Jackson Karen McNamara Bradd Witt 《International Journal of Disaster Risk Science》 SCIE CSCD 2017年第4期358-373,共16页
The societal costs of disasters around the world are continuing to increase and Pacific Island countries are considered some of the most vulnerable. This is primarily due to a combination of high hazard exposure coupl... The societal costs of disasters around the world are continuing to increase and Pacific Island countries are considered some of the most vulnerable. This is primarily due to a combination of high hazard exposure coupled with a range of social, economic, physical, and political vulnerabilities. This article contributes to the growing body of work that aims to understand the causal factors of disaster vulnerability, but with a specific focus on small island developing states. The article first develops a framework for understanding disaster vulnerability, drawing on extensive literature and the well-established Methods for the Improvement of Vulnerability in Europe(MOVE)framework, and second, applies this adapted framework using empirically-derived data from fieldwork on Emae Island, Vanuatu to provide a working understanding of the causal elements of disaster vulnerability. Drawn from a significant body of scholarship at the time, the MOVE framework was primarily developed as a heuristic tool in which disaster vulnerability is considered to be a function of exposure, susceptibility(socially, economically, physically, culturally, environmentally, institutionally), and a lack of resilience. We posit that this adapted framework for small islands should also include historical susceptibility,and we prefer livelihood resilience(as capabilities, social capital, knowledge, participation, and human rights) over lack of resilience. We maintain that understanding disaster vulnerability holistically, which is inclusive of both strengths and drawbacks, is crucial to ensure that limited resources can target the causal factors that produce vulnerability and help safeguard and improve livelihoods in both the short and long term. 展开更多
关键词 Disaster risk reduction Disaster vulnerability Livelihood resilience small islands VANUATU
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Capacities in Facing Natural Hazards: A Small Island Perspective
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作者 Mercy M.F.Rampengan Agni Klintuni Boedhihartono +2 位作者 Lisa Law J.C.Gaillard Jeffrey Sayer 《International Journal of Disaster Risk Science》 SCIE CSCD 2014年第4期247-264,共18页
Isolated communities on small islands are often characterized as vulnerable and marginalized. We studied the recent history of Laingpatehi, a village on Ruang Island off the north coast of Sulawesi, Indonesia to show ... Isolated communities on small islands are often characterized as vulnerable and marginalized. We studied the recent history of Laingpatehi, a village on Ruang Island off the north coast of Sulawesi, Indonesia to show that the marginalization-vulnerability nexus can be offset by capacity and social cohesion to enable sustainable livelihoods. The island has been impacted by volcanic eruptions,earthquakes, and competition for marine resources from mainland-based fishermen. The community has shown a remarkable ability to cope and prosper in the face of a series of external hazards. We used a sustainable livelihoods approach to identify the assets that enabled the villagers to cope. Strong social cohesion was central to the ability to organize the community and confront hazards. A diversified livelihood strategy drawing on the small island environment and its coastal and marine resources, income generating activities in a distant satellite village, and significant remittances from employment in other parts of Indonesia underpinned people’s capacities to face hazards.Government assistance played a supporting role. The case of Laingpatehi demonstrates how remoteness, rather than being a source of vulnerability, can provide access to existing resources and facilitate innovation. Disaster risk reduction strategies should focus more on reinforcing these existing capacities to deal with hazards and less on physical protection and postdisaster responses. 展开更多
关键词 Human and social resources Indonesia Livelihood diversity Natural hazards Remote marginal communities small islands
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Heterogeneous sea-level rises along coastal zones and small islands 被引量:1
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作者 Guoshuai Li Xin Li +5 位作者 Tandong Yao Tao Che Hong Yang Mingguo Ma Haipeng Zhao Xiaoduo Pan 《Science Bulletin》 SCIE EI CAS CSCD 2019年第11期748-755,共8页
Coastal zones and many small islands are highly susceptible to sea-level rise(SLR). Coastal zones have a large exposed population and integrated high-value assets, and islands provide diverse ecosystem services to mil... Coastal zones and many small islands are highly susceptible to sea-level rise(SLR). Coastal zones have a large exposed population and integrated high-value assets, and islands provide diverse ecosystem services to millions of people worldwide. The coastal zones and small islands affected by SLR are likely to suffer from submergence, flooding and erosion in the future. However, very few studies have addressed the heterogeneity in SLR changes and the potential risk to coastal zones and small islands. Here we used the mean sea level(MSL) derived from satellite altimetry data to analyse the trends and accelerations of SLRs along global coastal zones and small islands. We found that except for the Antarctic coastal zone, the annual MSL within 50 km of the coasts presented an increasing trend of 3.09 ± 0.13 mm a^-1 but a decreasing acceleration of -0.02 ± 0.02 mm a^-2 from 1993 to 2017. The highest coastal MSL trend of3.85 ± 0.60 mm a^-1 appeared in Oceania, and the lowest trend of 2.32 ± 0.37 mm a^-1 occured in North America. Africa, North America and South America showed acceleration trends, and Eurasia, Australia and Oceania had deceleration trends. Further, MSLs around global small islands reflected an increasing trend with a rate of 3.01 ± 0.16 mm a^-1 but a negative acceleration of -0.02 ± 0.02 mm a^-2. Regional heterogeneity in the trends and accelerations of MSLs along the coasts and small islands suggests that stakeholders should take discriminating precautions to cope with future disadvantageous impacts of the SLR. 展开更多
关键词 SEA-LEVEL RISE COASTAL ZONES small islandS HETEROGENEITY
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Early Palaeozoic Evolution of the Zhen' an- Xichuan Block and the Small Qinling Multi-Island Ocean Basin 被引量:1
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作者 Yin Hongfu Huang DinghuaChina U niversity of Geosciences, W uhan, Hubei 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 1996年第1期1-15,共15页
Based on studies of palaeogeography, palaeobiogeography, palaeomagnetism, geochemistry and volcanism, this paper proposes that the Zhen'an-Xichuan area was a small Early Palaeozoic block rifted away from South Qin... Based on studies of palaeogeography, palaeobiogeography, palaeomagnetism, geochemistry and volcanism, this paper proposes that the Zhen'an-Xichuan area was a small Early Palaeozoic block rifted away from South Qinling and suturing onto North Qinling earlier than the other parts of South Qinling. In the Early Palaeozoic Qinling was a small archipelagic ocean basin with 5 rows of islands including the Zhen'an-Xichuan block. The drifting of the Yangtze and North China plates and the islands between them in the same direction at different speeds caused their suturing process to be different from the classic plate collision, which is the major feature of the suturing of the multi-island Tethys ocean basin. This also explains the problem that the Caledonian collision did not result in orogeny in eastern Qinling. 展开更多
关键词 Eastern Qinling multi-island small ocean basin Caledonian movement Zhen'an-Xichuan block
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Repairing small wounds around ankle by medial planta island flaps pedicled with anterior tibial artery perforator in front of inner malleolus
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作者 魏在荣 《外科研究与新技术》 2011年第4期268-268,共1页
Objective To discuss the application of medial planta island flaps pedicled with anterior tibial artery perforator in front of inner malleolus for repairing small wounds around ankle Methods From Jan. 2005 to Jun. 200... Objective To discuss the application of medial planta island flaps pedicled with anterior tibial artery perforator in front of inner malleolus for repairing small wounds around ankle Methods From Jan. 2005 to Jun. 2009,10 cases with small wounds around ankle 展开更多
关键词 Repairing small wounds around ankle by medial planta island flaps pedicled with anterior tibial artery perforator in front of inner malleolus
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构网型与跟网型逆变器并联系统精确频域建模及简化稳定判据
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作者 尚佳宇 虞家骏 +3 位作者 刘增 王施珂 李嘉瑞 刘进军 《电力系统自动化》 北大核心 2025年第2期53-63,共11页
构网型逆变器与跟网型逆变器并联系统被广泛应用于可再生能源分布式接入的孤岛交流微网中。构网型逆变器功率-频率下垂控制的功率环和跟网型逆变器的锁相环均会产生基波频率小信号动态,进而并联的功率环以及锁相环之间将存在较强的基波... 构网型逆变器与跟网型逆变器并联系统被广泛应用于可再生能源分布式接入的孤岛交流微网中。构网型逆变器功率-频率下垂控制的功率环和跟网型逆变器的锁相环均会产生基波频率小信号动态,进而并联的功率环以及锁相环之间将存在较强的基波频率相互作用,严重影响系统稳定性。针对上述问题,首先,基于端口阻抗和频率-电流端口频域特性,文中构建了构网型与跟网型逆变器单机及其并联系统的精确小信号频域模型,其中包含了主电路动态、电压电流内环动态、功率环和锁相环频率动态及其互相作用动态。进而,基于该频域模型分析了频率动态的特性及其影响,并在典型工况条件下利用盖尔圆定理推导出了基于该并联系统回率矩阵主对角元的简化稳定判据。最后,仿真和实验验证了所提频域模型和简化稳定判据的准确性和有效性。 展开更多
关键词 构网型逆变器 跟网型逆变器 孤岛微网 并联系统 小信号稳定性 阻抗模型 频率动态 稳定判据
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华阳一矿小煤柱孤岛工作面回采巷道围岩支护优化研究
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作者 任超鹏 《陕西煤炭》 2025年第2期105-108,共4页
巷道围岩体的控制工作一直以来是煤炭企业要解决的关键技术性难题,小煤柱孤岛工作面回采巷道受工程扰动影响较大,伴随着巷道围岩的局部应力集中、裂隙发育明显、煤柱承载性较差等问题,使得巷道围岩的整体形变量较大。针对上述情况,以华... 巷道围岩体的控制工作一直以来是煤炭企业要解决的关键技术性难题,小煤柱孤岛工作面回采巷道受工程扰动影响较大,伴随着巷道围岩的局部应力集中、裂隙发育明显、煤柱承载性较差等问题,使得巷道围岩的整体形变量较大。针对上述情况,以华阳一矿12062工作面下巷为研究对象,根据巷道围岩钻孔窥视的整体裂隙发育情况,采用锚索补强支护+架棚(π型钢+单体支柱)支护的联合支护形式来控制巷道围岩的整体变形,同时给出具体的支护方案。回采巷道现场实际应用效果表明,12062工作面下巷巷帮及顶底板最大形变量分别为460 mm和378 mm,巷道围岩的实际形变量完全可以适应井下的安全生产需求,围岩支护优化效果明显。 展开更多
关键词 孤岛工作面 小煤柱 围岩支护 支护效果
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Movement Patterns of the Eastern Chipmunk (<i>Tamias striatus</i>) in Four Fragmented Landscapes of Prince Edward Island, Canada
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作者 Sheldon B. Opps Leslie A. Cudmore Marina Silva-Opps 《Open Journal of Ecology》 2020年第10期688-715,共28页
The analysis of animal movement patterns can provide important information on animals’ responses to habitat features. In this study, the movement paths of eastern chipmunks (<em>Tamias striatus</em>) were... The analysis of animal movement patterns can provide important information on animals’ responses to habitat features. In this study, the movement paths of eastern chipmunks (<em>Tamias striatus</em>) were examined in four landscapes, with different levels of habitat fragmentation, using either fluorescent powdering or spool-and-line tracking. Descriptions of the tree and ground vegetation communities were performed in the vicinity of the trail to obtain information on habitat use and habitat selection. Several key movement variables were calculated, including the total path length, net distance, fractal dimension, and radius of gyration. Despite statistically significant differences in some of the movement metrics between the four landscapes, the overall movement patterns were generically the same for all of chipmunk paths examined in this study. The data were compared to trends expected based on random or correlated random walks, as well as Lévy-walk models. The mean squared net displacement did not support the correlated random walk predictions, except at smaller spatial scales, but overall demonstrated Lévy-like super diffusive behaviour. Lévy-like patterns were also confirmed from the move-length distributions that demonstrated truncated-tail power-law behaviour. Although this would suggest invariance of the movement patterns at all spatial scales studied, fractal analysis revealed at least two transitions in movement patterns at scales of around 2 and 5 m. The transition point at 2 m was negatively correlated with the density of small trees, while the transition at ~5 m was positively correlated with the spatial distribution of large trees. As the habitat-preference data showed that small trees are among the least preferred habitat component, while large trees were among the most preferred habitat, chipmunks are likely to alter their movement behaviour to avoid small trees, and attracted towards large trees possibly to avoid predators. Overall, we determined three principal domains of movement: at smaller spatio-temporal scales, foraging activities dominate and the movement is highly correlated but also random;at intermediate spatial scales, chipmunks may be moving to avoid predators, using different environmental cues, and the movement is more directed (but still influenced by vegetation patterns at intermediate scales);at larger spatio-temporal scales, the movement is dominated by long-range/long-term memory and homing to burrows and other key habitat features, such as food caches, drives more directed movement. The fact that scale-dependent movement mechanisms could give rise to LW patterns is consistent with recent studies. 展开更多
关键词 Fluorescent Powder Spool-and-Line Fractal Radius of Gyration Lévy Walk Correlated Random Walk small Mammals Prince Edward island
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我国海岛小流域防洪“四预”模型研究
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作者 商华岭 蒋俏芬 +3 位作者 李波 瞿思敏 李梦霖 韩志康 《水利信息化》 2024年第6期29-34,共6页
我国海岛众多,具有独特的气候和下垫面条件,在小流域防洪方面和内陆地区有较为明显的差异。为提升海岛小流域防洪能力,基于数字孪生技术,通过构建数据底板,整合数据资源,完成数字化场景搭建,构建水文水动力耦合模型,模拟洪水演进过程,... 我国海岛众多,具有独特的气候和下垫面条件,在小流域防洪方面和内陆地区有较为明显的差异。为提升海岛小流域防洪能力,基于数字孪生技术,通过构建数据底板,整合数据资源,完成数字化场景搭建,构建水文水动力耦合模型,模拟洪水演进过程,开展防洪“四预”系统建设。以岱山岛典型小流域枫树流域为研究区域,模拟不同频率下暴雨洪水情景,初步实现小流域预报、预警、预演、预案等成果,成果表明:研究区域当下的防洪体系难以抵御30年一遇以上的洪水,应加强水旱灾害防御体系建设。研究成果能够较好地预测、模拟海岛小流域洪水过程,为海岛防洪“四预”体系建设提供技术支撑。 展开更多
关键词 防洪“四预” 海岛小流域 数据底板 水文水动力模型
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大国对小岛屿国家气候援助的实践及影响:以“澳图条约”为视角
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作者 李明杰 张海文 《太平洋学报》 CSSCI 北大核心 2024年第4期60-73,共14页
气候变化已经成为小岛屿国家最关切的议题之一,但多数小岛屿国家受限于其发展程度,只能依赖他国援助和支持以应对气候变化产生的影响。近年以来,这种需求正在变得愈发迫切。在2023年11月签订的“澳—图睦邻联盟条约(Australia-Tuvalu Fa... 气候变化已经成为小岛屿国家最关切的议题之一,但多数小岛屿国家受限于其发展程度,只能依赖他国援助和支持以应对气候变化产生的影响。近年以来,这种需求正在变得愈发迫切。在2023年11月签订的“澳—图睦邻联盟条约(Australia-Tuvalu Falepili Union Treaty)”(以下简称“澳图条约”)中,图瓦卢以包括允许澳大利亚介入其外交和安全事务在内的高昂代价,换取澳大利亚的气候援助承诺。气候变化对小岛屿国家国际法人格和海洋权利的潜在影响,是理解双方合意缔结该条约真实动因的重要切入点。更为值得关注的是,“澳图条约”反映着部分大国以气候援助为支点,愈发深入地介入小岛屿国家内外事务的实践趋向。倘若类似“气候合作”由个例演变成固定的范式,大国将不断扩张在小岛屿国家的势力范围,其他小岛屿国家也将不得不为自身的生存而寻找大国的庇护,小岛屿国家为对抗大国控制而建立的区域组织也将被瓦解,进而彻底改变目前太平洋地区的地缘政治格局。大国与小岛屿国家应对气候变化的博弈,将对我国与小岛屿国家的深度合作产生潜在影响。有鉴于此,中国应从尊重国家主权和独立自主的基本立场出发,坚决抵制以气候合作为名干涉小岛屿国家内外事务的做法,并积极为小岛屿国家提供针对性的气候变化应对方案,推动前瞻性的“气候外交”布局。 展开更多
关键词 小岛屿国家 气候合作 海平面上升 全球海洋治理 海洋命运共同体
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考虑构网型和跟网型变流器的孤岛微电网小信号稳定性分析 被引量:1
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作者 张心怡 杨波 《综合智慧能源》 CAS 2024年第2期12-18,共7页
由电力电子设备主导的孤岛微电网面临系统惯量小、无频率支持而导致的稳定性问题,恒功率负荷的渗透也加剧了系统的失稳风险。研究了由构网型变流器和跟网型变流器为主导的,计及恒功率负荷的孤岛微电网稳定性。首先,建立了孤岛微电网系... 由电力电子设备主导的孤岛微电网面临系统惯量小、无频率支持而导致的稳定性问题,恒功率负荷的渗透也加剧了系统的失稳风险。研究了由构网型变流器和跟网型变流器为主导的,计及恒功率负荷的孤岛微电网稳定性。首先,建立了孤岛微电网系统的全阶小信号模型,通过特征值分析法研究了构网型变流器控制中下垂系数对稳定性的影响并得到了下垂系数的数值上界;其次,通过参与因子法揭示了系统参数和控制参数对小信号稳定性的影响;最后,在Matlab Simulink中建立了该孤岛微电网的开关模型,仿真验证了小信号分析结果的准确性。 展开更多
关键词 构网型变流器 跟网型变流器 孤岛微电网 恒功率负荷 小信号稳定性 下垂系数 新型电力系统
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基于GIS和RS的中小城市热岛特征分析——以漯河市为例
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作者 江清霞 《科学技术创新》 2024年第15期1-4,共4页
随着现代化生活水平的提高,中小城市产业结构的调整以及人们衣食住行翻天覆地的变化,中小城市的城市热岛问题日益突出,为了引起对中小城市热岛效应的重视撰写本文。本文以中小城市漯河市为例,融合GIS、RS和气象数据,采用气象热岛计算方... 随着现代化生活水平的提高,中小城市产业结构的调整以及人们衣食住行翻天覆地的变化,中小城市的城市热岛问题日益突出,为了引起对中小城市热岛效应的重视撰写本文。本文以中小城市漯河市为例,融合GIS、RS和气象数据,采用气象热岛计算方法、分裂窗遥感温度反演算法、地表热岛强度指数法(UHII)和热岛比例指数(UHPI)等计算方法进行城市热岛特征分析,结果表明:6、7、8三个月随着夏季温度的升高,下垫面水体无热岛效应,林地和耕地热岛面积比例较低,说明农林草绿色植被缓解地表温度增长作用明显,其中以高覆盖度的树林缓解效果更大;中小城市热岛效应显著地问题在城市规划和政府决策时应得到足够重视。 展开更多
关键词 地理信息系统 遥感 中小城市热岛 特征分析
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某多用途小型堆核岛消防系统设计与研究
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作者 汪钰辉 张进 +2 位作者 柏慧 刘文芳 李娜娜 《工业用水与废水》 CAS 2024年第6期97-101,共5页
核岛厂房是核电厂运行的核心组成部分,其具有保护物项种类复杂、安全级别高、火灾危险性大、辐射剂量高、救援人员难以接近等特殊性,做好核岛消防系统设计对于整个核岛的安全运行至关重要。结合某多用途模块式小型压水堆工程实例,详细... 核岛厂房是核电厂运行的核心组成部分,其具有保护物项种类复杂、安全级别高、火灾危险性大、辐射剂量高、救援人员难以接近等特殊性,做好核岛消防系统设计对于整个核岛的安全运行至关重要。结合某多用途模块式小型压水堆工程实例,详细介绍了核岛消防系统的设备选型、水力计算及设计要点,并对其缓解核安全事故的应用进行了探讨,以期为其他同类工程设计提供思路与参考。 展开更多
关键词 多用途小型堆 核岛 水力计算 核岛消防系统 核安全事故
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温州沿海小型海岛植物丰富度和β多样性及其影响因子 被引量:25
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作者 王金旺 魏馨 +2 位作者 陈秋夏 李效文 杨升 《生态学报》 CAS CSCD 北大核心 2017年第2期523-540,共18页
于2012-2015年调查了温州沿海20个小型无居民海岛的植物组成,共记录到维管束植物366种,隶属于95科244属,其中草本植物226种木本植物140种。拟合了5个种-面积关系模型,采用赤池信息量AIC对模型进行选择,发现种-面积-生境类型关系模型SAH... 于2012-2015年调查了温州沿海20个小型无居民海岛的植物组成,共记录到维管束植物366种,隶属于95科244属,其中草本植物226种木本植物140种。拟合了5个种-面积关系模型,采用赤池信息量AIC对模型进行选择,发现种-面积-生境类型关系模型SAH_nR权重系数最大,为40.26%,两种断点回归种-面积关系模型BR-SAR权重系数分别仅为6.94%和0.43%,表明基于这20个海岛拟合的种-面积关系不存在小岛屿效应。岛屿植物物种丰富度主要受面积A影响,离大陆距离,I_m对丰富度无显著作用;偏相关分析表明除A外,周长/面积比PAR和岛屿生境多样性指数H_d显著影响了植物丰富度,其逐步回归方程分别为:植物总丰富度S=76.714+1.696A-0.046PAR,R^2=0.839;木本植物丰富度S_(-woody)=6.525+0.455A+24.544H_d,R^2=0.697;草本植物丰富度S_(-herbaceous)=66.899+1.285A-0.04PAR-23.434H_d,R^2=0.865。偏最小二乘回归PLS分析中岛屿空间特征参数对岛屿物种相似性指数重要性排序为:I_m(0.61)>I_i(0.56)>PAR(0.49)>A(0.20)>岸线长度Per(0.14)>生境类型H(0.072)>岛屿高程E(0.065)>岛屿形状指数SI(0.05)。由此可见,近岸的小型海岛植物丰富度并不总是由岛屿面积来决定;隔离度对岛屿植物β多样性影响较大。 展开更多
关键词 岛屿生物地理学 物种丰富度 种-面积关系 空间特征 小岛屿效应
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锆-4合金疲劳断口的分形维数分析 被引量:3
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作者 任文伟 康戈文 +2 位作者 甘春泉 李聪 邱绍宇 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2006年第1期13-16,共4页
采用基于有限元反射模型的SFS(shapefromshading)算法对锆-4合金低周疲劳断口进行三维重建,定量描述了断口表面的三维形貌。然后,根据小岛法的基本理论,研究了断口三维形貌的分维计算方法,计算了一系列平行于断口表面的分维值。结果表明... 采用基于有限元反射模型的SFS(shapefromshading)算法对锆-4合金低周疲劳断口进行三维重建,定量描述了断口表面的三维形貌。然后,根据小岛法的基本理论,研究了断口三维形貌的分维计算方法,计算了一系列平行于断口表面的分维值。结果表明:在40%~60%高度范围内,根据小岛法作出周长L(η)-面积A(η)在双对数图上呈近似直线关系,表明Zr-4合金断口具有良好的分形特征;分形维数D变化范围为1.5809~1.6450,平均值1.6031,标准差0.0237。表明在此切割高度范围内,高度对分维值影响较小。 展开更多
关键词 锆-4合金 疲劳断口 三维重建 小岛法 分形维数
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