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281.
该文以时间先后为顺序,系统总结了1972年人类环境会议以来,联合国为推进全球可持续发展所采取的重要行动,对取得的进展和存在的差距进行了评述。认为,人类环境会议特别是环发大会以来,联合国为实现全球经济社会可持续发展付出了巨大的努力,在许多领域推动形成了重要的共识和多边国际公约,促进了可持续发展伙伴关系的形成与发展,加快了许多国家和地区的可持续发展行动。但是,从目前来看,所取得的进展远低于需要达到的水平,突出地体现在千年发展目标进展缓慢、环发领域谈判举步维艰、国际履约明显不足、可持续发展伙伴关系的效果并不理想等。基于这一现实,本文认为"里约+20"大会应努力在如下四个方面取得进展:一是重振里约精神,加快已有政治承诺的落实;二是在坚持里约原则的前提下,围绕气候变化等重大全球性挑战做出新的政治承诺;三是在坚持里约原则的前提下,勾画出人类绿色发展的未来蓝图;四是促进以南南合作为重点的国家合作。  相似文献   
282.
The present paper reviews the UN important efforts to promote global sustainable development in the chronological order since UN Conference on Human Environment in 1972, and analyzes the progress and gap. The results show that the UN system has made great efforts for global sustainable development since the UN Conference on Human Environment, especially since UN Conference on Environment and Development, promoted the formation of important consensus and multilateral international conventions on many fields, boosted the development of partnership in the field of sustainable development, and accelerated actions for sustainable development of many countries and regions. However, at present, the progress made is still far below the level required, prominently reflected in the slow progress toward the millen- nium development goals, the difficulties in negotiations in the field of environment and development, insufficient fulfillment of international agreements and conventions, and undesirable effects of partnership in the field of sustainable development. Based on these, the paper puts forward four suggestions for UN Conference on Sustainable Development in 2012(Rio+20):(1) to revitalize the "spirit of Rio" and accelerate the implementation of existing politi- cal commitments; (2) to make new political commitments focusing on climate change and other major global challenges under the Rio principles; (3) to lay out a blueprint of green economy under the Rio principles; and (4) to promote South-South cooperation as the focus of international cooperation.  相似文献   
283.
结构损伤诊断与系统时域辨识研究综述   总被引:1,自引:1,他引:0  
对结构时域辨识理论及其应用进行系统研究和综述。研究表明:环境激励的非平稳与不确定性、响应信息的不完备性、反问题的不适定性以及测试噪声等是影响系统时域辨识理论在结构损伤诊断中应用的关键因素。以影响因素为主线,系统阐述结构时域辨识理论、方法的发展和研究现状,并对其优、缺点进行比较。分析指出,基于系统识别的结构损伤诊断技术适合于从整体层次上把握结构的健康状况,只有将其与局部损伤检测方法结合才有可能对大型复杂结构的健康状况作出正确的评估。展望结构时域辨识技术的发展趋势认为:随机子空间法等先进的系统辨识方法、EMD非平稳信号处理技术以及神经网络智能算法将成为未来研究和发展的主流。  相似文献   
284.
2007年林业安全生产工作综述   总被引:1,自引:1,他引:0  
从安全管理、安全生产宣传教育与培训、林业标准化等方面全面阐述了2007年林业安全生产工作,并提出了今后林业安全生产工作要点。  相似文献   
285.
This article critically reviews environmental assessment (EA) practices in Sri Lanka, with a particular focus on ecology. An overview is provided of the domestic and international influences which have shaped the administrative process which is currently a two-tiered scheme. An Initial Environmental Examination (IEE) provides a preliminary screening tool, prior to the requirement for a full Environmental Impact Assessment (EIA). A comprehensive survey of Sri Lankan national archives showed that 463 EAs were completed in the period 1981–2005, with the bulk of these in the more populated Western and North Western Provinces. Two-thirds were IEE surveys, while the remaining third advanced to full EIA. A representative sample of 130 EAs (both IEEs and full EIAs) spanning a broad range of project types, scales, and environmental settings was selected to evaluate the quality of the ecological investigations within the published environmental impact statements (EISs). These were assigned into five classes of “explanatory power”, on the basis of their scientific content in relation to survey, analysis, and reporting of ecological interests. Within most EISs, the ecological impact assessment (EcIA) was restricted to the lowest two categories of ecological assessment, i.e., tokenistic presentation of reconnaissance-level species lists without further analysis of the development implications for individual organisms or communities. None of the assessments reviewed provided statistically rigorous analysis, which would be required if ecological impact studies are to include quantitative and testable predictions of impact, which could then be followed up by appropriate post-impact monitoring programs. Attention to key local issues such as biodiversity or ecosystem services, which also have strong social dimensions in the developing world, was also notably underrepresented. It was thus concluded that despite the existence of a sound legislative framework in Sri Lanka, the analysis contained within EISs generally fails to convey meaningful information to the relevant stakeholders and decision makers involved in protecting ecological interests and promoting sustainable development. The introduction of strategic environmental assessment (SEA) is considered an important tool to strengthen the institutional capacity of Sri Lankan government to implement current regulations and, in particular, to combat the cumulative effects of incremental development.  相似文献   
286.
We reviewed literature reporting both total and methylmercury from biota from Acadia National Park, Maine, USA. Our review of existing data indicates that 1) mercury contamination is widespread throughout the Park’s various aquatic ecosystems; 2) mercury pollution likely represents a moderate to high risk to biota inhabiting the Park; and 3) biota at all trophic levels possess elevated concentrations of both total and methylmercury. Watershed fire history and the resulting post-fire forest succession patterns are an important landscape attribute governing mercury cycling at Acadia National Park. Therefore, park service personnel should consider these factors when planning and implementing Hg biomonitoring efforts. Additional baseline funding from the National Park Service for Hg research and biomonitoring will likely be required in order to further evaluate the spatial and temporal patterns of mercury contamination in the park’s biota. An erratum to this article can be found at  相似文献   
287.
Agricultural land use is transforming rapidly in Southeast Asia, often supported by development policies aiming primarily at economic growth. However, the socioeconomic outcomes of these changes for smallholder farmers remain unclear. Here, we systematically review cases of agricultural land use change in Southeast Asia to assess their socioeconomic outcomes and potential trade-off and synergies in these outcomes. Of the 126 reviewed cases, we find mostly positive outcomes for income (SDG 1, 100 cases) and employment (SDG 8, 11 cases), while outcomes on health (SDG 3, 9 cases) were mixed, and outcomes for food security (SDG 2, 44 cases), gender equality (SDG 5, 13 cases), and economic equality (SDG 10, 14 cases) were mostly negative. Studies describing multiple outcomes show indications of synergies between income and food security, and between income and employment, but also potential trade-offs between income and economic equality. In addition, we find that economic land concessions result in multiple negative outcomes more often than other types of land governance regimes. The results provide evidence that economic gains from agricultural land use change often come at a cost of other dimensions of sustainable development.Supplementary InformationThe online version contains supplementary material available at 10.1007/s13280-022-01712-4.  相似文献   
288.
有毒物质低剂量刺激作用的研究进展   总被引:10,自引:0,他引:10  
有毒物质低剂量刺激作用(hormesis)是一个有争议的毒理学问题.本文综述了hormesis的研究进展、关键学术问题以及可能的作用机制,并对有关hormesis的机理研究与环境内分泌干扰物研究和风险评价理论及方法之间的关系进行了讨论,提出了其中存在的关键科学问题和可能的研究方向.  相似文献   
289.
70年的中国环境立法,总体上分为三个阶段,即起步阶段、发展阶段和进入生态文明新阶段。起步阶段是从1949年10月新中国成立到1978年底党的十一届三中全会召开之前,发展阶段是从1979年到2012年党的十八大召开之前,进入生态文明新阶段是从2012年11月党的十八大召开至今。历史表明,在毛泽东主席和周恩来总理等老一辈党和国家领导人的关心和有关部门的共同努力下,我国的环境立法在新中国成立后已经提到工作日程,并取得一定成绩。党的十八大以来我国的环境法制建设取得历史性进步。在充分肯定成就的基础上,通过反思,发现我国环境立法依然存在立法质量不高、立法体制机制不够合理、实施效果不理想等问题。为此,应当根据习近平生态文明思想和党的十九大、十九届四中全会精神,明确新时代环境立法的指导思想和原则,加快环境法律的立改废释工作,切实提高环境立法质量,补齐生态保护立法的短板,积极推进相关法律的生态化,加强配套环境法规和规章的制定,加快健全完善生态环境保护法律体系,实现环境治理体系与治理能力的现代化。  相似文献   
290.
《中国环境管理》自2015年编委会组建以来,坚持学术期刊的办刊定位,不断开拓出版资源,持续刊登高质量论文,办刊质量稳步提升。本文主要总结《中国环境管理》自编委会组建以来的办刊进展,分析期刊发展形势,重点阐述近几年提升办刊质量的主要做法和办刊思路,并对未来期刊发展提出思考和展望。《中国环境管理》作为一本行业性中文科技期刊,其办刊探索对于类似中文科技期刊的发展具有案例研究意义。  相似文献   
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