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1.
能源供应安全是国家社会经济可持续发展的基础,直接关系着国家的稳定和谐。近年来,随着能源供需矛盾的日益严重,区域能源安全研究逐渐成为学术界的热点问题之一。本文运用系统动力学理论构建中国能源安全的系统动力学模型,通过对产业经济、资源、人口、环境子系统参数的调控,预测能源生产量、能源消耗量、能源供需缺口与能源战略储备等变量的动态变化,模拟得到三种我国能源安全系统的发展模式。研究结果表明:保持调控参数不变,我国现有能源安全系统的稳定性将难以持续;通过参数的调整,模拟得到方案1与方案2下的能源安全系统发展模式。相比方案current,从长远上看,因国家战略储备的增加,方案1下的能源安全系统稳定性较好;从短期角度看,方案2中的能源生产量持续增加,保证了能源安全系统的稳定性,但从长远上看,国家战略储备的减少将会威胁我国能源安全系统的稳定性。根据所得结果,提出建立国家能源统计管理账户、强化能源战略储备以及加快新能源与再生能源使用等措施以保证我国能源安全系统的稳定、健康发展。 相似文献
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能源是经济发展的基础和人类社会进步最重要的战略资源之一,然而,能源的地域分布不均衡性和稀缺不可再生性,赋予了其浓厚的地缘政治色彩,以致于能源战略冲突频频发生.中国在快速的和平发展进程中,能源需求和消耗与经济发展紧密相连,怎样在诸多国家能源战略和冲突中采取合理有效的外交手段,以保证中国的能源安全和国家利益是现今中国外交需要探讨的问题. 相似文献
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理解能源安全必须综合考虑其客观性、主观性和主体间性。世界主要能源消费国迫切希望建立一种在非常态下能够自给自足的可持续能源系统,太阳能光伏凭借其得天独厚的优势成为各国能源安全战略首选。以德日美为代表的光伏大国将战略政策重点指向技术创新和市场推广,而将能耗高、污染重的生产制造环节隐秘地转移到以中国为主的发展中国家。在清洁能源需求日益增长而供给严重不足所引发的主要能源矛盾面前,中国应将光伏清洁利用上升为国家安全战略,并实施一系列有利于撬动国内光伏需求、保障光伏技术创新、加强市场监管、建设能源银行和开展战略环评的政策措施。 相似文献
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[目的/意义]研究《能源宪章条约》主要内容、组织结构、运行机制及功能,可为构建上合组织下的能源安全体系和"一带一路"能源投资贸易提供借鉴。[方法/过程]首先,基于国内外文献和能源行业实践,提出了能源安全范式的演变,深入分析了我国能源安全面临的诸多严峻挑战。其次,以《能源宪章条约》的历史演变、主要内容为依据,重点分析其作为欧洲能源安全战略的重要工具所发挥的作用和面临的问题。最后,结合能源宪章在中亚的扩展及其对我国能源安全的影响和我国在该地区的能源投资现状,以典型能源投资案例说明了《能源宪章条约》的"双刃剑"作用。[结果/结论]研究表明,《能源宪章条约》客观上对我国海外能源合作造成了一定的挤压和竞争,但加入国际能源组织,参与国际能源市场的运作是维护国家能源安全的最佳选择。因此,通过多边磋商,待宪章条约完善其内容和机制之际,采取再加入的方式可以更好地维护国家的能源安全。此外,宪章条约在多维度能源安全目标、能源市场竞争机制、能源安全的地区合作体系、能源跨境运输机制以及能源安全与气候变化等领域为我国提供了成熟的范本,具有重要的启示。 相似文献
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本文分析了我国能源紧缺的严峻形势和煤炭产业在国民经济发展和能源安全战略的重要地位,特别指出实施煤炭资源的国际化延伸战略和国家实行煤炭资源战略储备和保护性开采是煤炭资源两大重要国家战略。论证了其与国家能源安全的重要战略意义,这是实现科学的发展观和涉及国民经济与社会发展可持续性的重大前瞻性问题;提出在国际上特别是煤炭资源赋存丰富的发展中国家投建煤矿、延伸能源供应链,确保我国能源供应的多样化、多渠道;在战术和战略层面上,提出我国现阶段优质煤炭资源实行保护性开采和储备的可行性与紧迫性,为真正解决我国煤炭产业国际化和国家能源与经济安全的长远大计所面临的实际问题提供决策依据。 相似文献
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为了维护国家能源安全,自上个世纪90年代以来,我国按照互惠互利、共同发展的原则与非洲国家开展能源合作,目前非洲已成为我国石油进口的第二大重要来源。但中非能源合作还面临着非洲国家经济单一化,基础设施不完善,社会不稳定等问题和挑战。为此,我国需要加大对非洲能源基础设施援助,强化对国内行为体的协调,确立建设性调解原则,加强与欧美石油公司的合作。 相似文献
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随着经济发展对能源需求的不断扩大,使能源类企业受到国家的广泛关注,而能源类上市公司是这一行业的龙头企业,因此,能源类上市公司竞争力的提升对整体行业的国际竞争力和国家的能源安全都具有着重要的作用。本文通过国内外能源企业发展的对比分析,较全面地探讨了能源类上市公司的竞争力提升战略,提出多元化投资、资产重组,纵向一体化等运营战略。 相似文献
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能源是经济发展的基础和人类社会进步最重要的战略资源之一，然而，能源的地域分布不均衡性和稀缺不可再生性，赋予了其浓厚的地缘政治色彩，以致于能源战略冲突频频发生。中国在快速的和平发展进程中，能源需求和消耗与经济发展紧密相连，怎样在诸多国家能源战略和冲突中采取合理有效的外交手段，以保证中国的能源安全和国家利益是现今中国外交需要探讨的问题。 相似文献
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能源安全是国家安全与稳定发展的基石,能源高质量发展是国家经济长期增长的基本保障。文章分析俄乌冲突、美国能源统治和我国能源消费增长刚性需求等复杂国内外形势影响,以及我国能源转型发展的不确定性,总结其对我国能源发展和能源安全的战略要求;立足我国能源结构和资源禀赋,建立以化石能源为基础的自主可控、安全可靠的综合能源保障体系,发展多渠道能源开发和能源储备,制定支撑能源转型低碳发展的战略思路和技术路线;提出建立现代能源与矿业治理体系平台及拓扑图和构成:5G能源专网、能源与矿业大数据人工智能处理平台、区块链能源与矿业产业协作监管平台、省级和国家级监管中心,推进建立能源产业全方位安全观与现代能源矿业治理体系,为我国能源高质量发展和能源安全提供保障。 相似文献
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A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献