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热蒸发工艺中碳源微观结构对SiC晶须生长的影响 被引量:1
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作者 朱辉 李轩科 +4 位作者 董志军 丛野 袁观明 崔正威 李艳军 《化工新型材料》 CAS CSCD 北大核心 2018年第4期197-200,共4页
通过高温热蒸发硅粉工艺,以鳞片石墨、膨胀鳞片石墨、纳米炭黑和微米炭黑为碳源制备SiC晶须,研究了碳源结构对SiC晶须生长的影响。采用X射线衍射、扫描电镜和透射电镜等手段对不同碳源和制得样品的微观形貌和结构进行表征。结果表明:Si... 通过高温热蒸发硅粉工艺,以鳞片石墨、膨胀鳞片石墨、纳米炭黑和微米炭黑为碳源制备SiC晶须,研究了碳源结构对SiC晶须生长的影响。采用X射线衍射、扫描电镜和透射电镜等手段对不同碳源和制得样品的微观形貌和结构进行表征。结果表明:SiC晶须更容易在膨胀鳞片石墨和纳米炭黑表面生长,碳源具有乱层堆垛石墨结构和合适的晶粒尺寸是SiC晶须生长的决定性因素。 展开更多
关键词 SIC晶须 碳源结构 乱层堆垛石墨 晶粒尺寸
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碳排放量、碳源结构与中国经济的“充分-平衡”发展 被引量:10
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作者 刘梦 胡汉辉 《山西财经大学学报》 CSSCI 北大核心 2020年第4期1-15,共15页
通过测度2000—2015年中国30个省份的碳排放量、碳源结构及经济的"充分-平衡"发展水平,实证分析了碳排放对中国经济发展的作用。结果表明,碳排放量对中国经济的充分和平衡发展具有正向促进作用。基于碳源结构Dagum分解指数的... 通过测度2000—2015年中国30个省份的碳排放量、碳源结构及经济的"充分-平衡"发展水平,实证分析了碳排放对中国经济发展的作用。结果表明,碳排放量对中国经济的充分和平衡发展具有正向促进作用。基于碳源结构Dagum分解指数的分析结果表明,各省份的产业组内差异对经济"充分-平衡"发展指数具有显著的负向作用,而组间差异和超变密度对"充分-平衡"发展指数具有显著的正向作用,这意味着平衡产业内的碳源结构、扩大碳源结构的产业间差异和超变密度差异,有利于经济的充分和平衡发展,而提升绿色全要素生产率,是实现碳排放对经济发展作用转型的核心动力。 展开更多
关键词 碳排放量 碳源结构 绿色全要素生产率 充分-平衡发展 交叉验证
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昆明市低碳设施农业发展研究
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作者 王俊春 袁媛 +7 位作者 董晓波 钱敏 姜娇 董云峰 彭子芸 陈艺齐 陈蕊 李艳 《云南农业科技》 2019年第3期27-30,共4页
当前人类的发展,由于前期的过度开发和污染,气候的变化给人类各方面的活动带来了很大的负面影响。文章以昆明市农业碳排放为研究对象,研究了昆明市低碳设施农业的发展状况,并根据分析结果对后续低碳设施农业的发展提出了一定的建议。
关键词 农业生产 碳排放 碳源结构
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如何让绿水青山成为金山银山——基于碳排放对高质量发展作用的经验证据 被引量:15
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作者 刘梦 胡汉辉 《云南财经大学学报》 CSSCI 北大核心 2020年第4期19-35,共17页
"绿水青山就是金山银山"的科学论断,反映了高质量发展的重要特征。通过构建和测度2001—2015年中国30个省份的碳排放量、碳源结构与经济的充分、平衡的绿色发展指标,实证探究了碳排放对高质量发展的作用情况。结果表明,碳排... "绿水青山就是金山银山"的科学论断,反映了高质量发展的重要特征。通过构建和测度2001—2015年中国30个省份的碳排放量、碳源结构与经济的充分、平衡的绿色发展指标,实证探究了碳排放对高质量发展的作用情况。结果表明,碳排放量有助于经济的充分发展,对经济平衡发展的作用不显著,而对经济的绿色发展表现显著的负向作用;碳排放增速和碳源结构差异不利于经济的充分发展和绿色发展,但却有助于推进经济平衡;基于对碳源结构Dagum分解的组间差异和超变密度,由对充分增长的不显著作用转变为对经济平衡发展的正向促进作用和对经济绿色发展的负向抑制作用,而组内差异始终表现负向作用。因此,有步骤地降低碳排放,优化碳源结构,推进技术创新,实现向经济绿色发展的平稳过渡,是"绿水青山"真正转变为"金山银山"的必由之路。 展开更多
关键词 绿水青山就是金山银山 高质量发展 碳排放量 碳源结构 绿色全要素生产率
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西部大开发战略对西部地区碳排放影响效应研究 被引量:3
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作者 谢烛光 周茜 《生态经济》 北大核心 2021年第1期21-26,76,共7页
西部大开发战略在促进西部地区经济增长的同时,也影响了西部地区的碳排放量。为衡量西部大开发战略对碳排放的影响效应,文章收集了我国30个省份1997—2017年的省际面板数据,以Eviews10构建DID模型进行研究分析。发现西部大开发战略在西... 西部大开发战略在促进西部地区经济增长的同时,也影响了西部地区的碳排放量。为衡量西部大开发战略对碳排放的影响效应,文章收集了我国30个省份1997—2017年的省际面板数据,以Eviews10构建DID模型进行研究分析。发现西部大开发战略在西部地区碳排放绝对量增长的背景下,并未增加西部地区的碳排放量,反而促进了西部地区后发优势的发挥,具有生态友好性;进一步研究发现,西部大开发战略使西部地区碳源结构进一步向煤炭碳源倾斜。西部大开发战略在新时期应促进西部地区技术经济的发展,合理利用西部资源的同时开发新能源,保持生态友好性,促进西部地区经济—生态双赢模式的发展。 展开更多
关键词 西部大开发战略 双重差分 碳排放 碳源结构
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Safety and effective developing nuclear power to realize green and low-carbon development 被引量:3
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作者 YE Qi-Zhen 《Advances in Climate Change Research》 SCIE CSCD 2016年第1期10-16,共7页
This paper analyzes the role of nuclear power of China's energy structure and industry system. Comparing with other renewable energy the nuclear power chain has very low greenhouse gas emission, so it will play mo... This paper analyzes the role of nuclear power of China's energy structure and industry system. Comparing with other renewable energy the nuclear power chain has very low greenhouse gas emission, so it will play more important role in China's low-carbon economy. The paper also discussed the necessity of nuclear power development to achieve emission reduction, energy structure adjustment, nuclear power safety,environmental protection, enhancement of nuclear power technology, nuclear waste treatment, and disposal, as well as nuclear power plant decommissioning. Based on the safety record and situation of the existing power plants in China, the current status of the development of world nuclear power technology, and the features of the independently designed advanced power plants in China, this paper aims to demonstrate the safety of nuclear power. A nuclear power plant will not cause harm either to the environment and nor to the public according to the real data of radioactivity release, which are obtained from an operational nuclear plant. The development of nuclear power technology can enhance the safety of nuclear power. Further, this paper discusses issues related to the nuclear fuel cycle, the treatment, and disposal strategies of nuclear waste, and the decommissioning of a nuclear power plant, all of which are issues of public concern. 展开更多
关键词 Nuclear power and nuclear energy Role of nuclear power Scale development Nuclear safety Radioactivity release Nuclear fuel cycle
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Comparison of China's Carbon Emission Scenarios in 2050 被引量:3
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作者 Huimin Li Ye Qi 《Advances in Climate Change Research》 SCIE 2011年第4期193-202,共10页
Several representative studies on China's carbon emission scenarios in 2050 are compared in scenario settings, methodologies, macro parameters, energy consumption and structure, carbon emissions, and carbon emission ... Several representative studies on China's carbon emission scenarios in 2050 are compared in scenario settings, methodologies, macro parameters, energy consumption and structure, carbon emissions, and carbon emission intensity. Under the baseline scenario of the present policy framework, the future energy structure will be optimized and carbon emission intensity will decrease continually. China's carbon emissions up to 2050 show a significant increase reaching between 11.9 Gt and 16.2 Gt CO2 in 2050. By strengthening a low carbon policy, the optimization of energy structure and the decline in carbon emission intensity will become more obvious within the comparative scenarios, which show a significant decrease in carbon emission until 2050 reaching only between 4.3 Gt and 9.5 Gt CO2 bv then. 展开更多
关键词 carbon emission climate change emission scenario
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非光合CO_2同化微生物菌群的选育/优化及其群落结构分析 被引量:13
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作者 胡佳俊 王磊 +5 位作者 李艳丽 付小花 乐毅全 徐殿胜 陆兵 于建国 《环境科学》 EI CAS CSCD 北大核心 2009年第8期2438-2444,共7页
通过从海水及其沉积物中分离、筛选,并结合电子供体和无机碳源结构的优化以期获得不用光照与供氢的高效固碳微生物菌群;通过16S rDNA序列分析、比对等手段研究非光合固碳微生物菌群的结构,以期为优化群落配置,进一步提升固碳效率提供理... 通过从海水及其沉积物中分离、筛选,并结合电子供体和无机碳源结构的优化以期获得不用光照与供氢的高效固碳微生物菌群;通过16S rDNA序列分析、比对等手段研究非光合固碳微生物菌群的结构,以期为优化群落配置,进一步提升固碳效率提供理论依据.结果显示,通过分离和长期驯化可从海洋中得到在普通好氧、厌氧条件下具有固碳能力的非光合微生物菌群.添加硫代硫酸钠、硫化钠和氢气作为电子供体可有效提升菌群的固碳效率,在以硫代硫酸钠为电子供体的好氧、厌氧条件下,该菌群的CO2同化效率分别可达10.44 mg/L和12.56 mg/L.该固碳菌群对混合无机碳源的同化效率显著高于单一碳源,在以CO2、碳酸氢钠及碳酸钠为混合碳源情况下,菌群好氧、厌氧固碳效率(以CO2计)分别可达110 mg.(L.d)-1,和72mg.(L.d)-1,接近氢氧化细菌的水平.微生物群落结构分析结果表明,添加不同电子供体后,固碳微生物菌群的优势种发生了显著变化,在发现的16个优势菌种中,11个是不可培养微生物,即其只能以共生方式存在.菌群混合培养时的固碳效率可能是多种菌共同作用的结果,因此优化固碳微生物菌群的结构和配比将有利于其固碳效率的进一步提升. 展开更多
关键词 非光合微生物 CO2同化 电子供体 无机碳源结构 微生物群落结构
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China's Energy Strategy Adjustment under Energy Conservation and Carbon Emission Constraints 被引量:11
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作者 Lin Boqiang Yao Xin Liu Xiying 《Social Sciences in China》 2010年第2期91-110,共20页
The periodic character of economic development and energy demand, the basic national policy of saving energy and reducing emissions, and the constraints of curbing global warming and reducing greenhouse gas emissions ... The periodic character of economic development and energy demand, the basic national policy of saving energy and reducing emissions, and the constraints of curbing global warming and reducing greenhouse gas emissions all necessitate corresponding adjustments to China's energy strategy, and especially its energy structure strategy. The previous energy strategy focused primarily on energy reserves and production, i.e., focused on energy supply in order to meet energy demand. In response to global climate change, the readjustment of China's energy strategy has become imperative: on the one hand, the government needs to engage in serious management of both energy supply and energy demand to meet China's energy demand; on the other, it needs to reduce CO: emissions and make this a constraint on meeting energy demand. In our study, through establishing an optimal model, we get the optimal energy structure allowing for energy conservation and emission constraints; then we proceed, by means of a computable general equilibrium (CGE) model, to estimate the impact of rising energy costs as a result of changes in energy structure on the macro-economy. Our research results show that the government's plan for renewable energy has a positive impact on reducing CO2 emissions. However, rising energy costs as a result of changes in the energy structure under carbon emission constraints negatively affects macro-economic performance. As many important Chinese industries depend heavily on coal and thermoelectricity, the room for CO2 emission reductions is limited at the present stage. Instead, the government should pay attention to realizing CO2 emission reductions in other fields of economic life. 展开更多
关键词 energy demand emissions of carbon dioxide energy structure MACRO-ECONOMY
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City-level emission peak and drivers in China 被引量:39
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作者 Yuli Shan Yuru Guan +7 位作者 Ye Hang Heran Zheng Yanxian Li Dabo Guan Jiashuo Li Ya Zhou Li Li Klaus Hubacek 《Science Bulletin》 SCIE EI CAS CSCD 2022年第18期1910-1920,M0004,共12页
China is playing an increasing role in global climate change mitigation,and local authorities need more city-specifc information on the emissions trends and patterns when designing low-carbon policies.This study provi... China is playing an increasing role in global climate change mitigation,and local authorities need more city-specifc information on the emissions trends and patterns when designing low-carbon policies.This study provides the most comprehensive COemission inventories of 287 Chinese cities from 2001 to2019.The emission inventories are compiled for 47 economic sectors and include energy-related emissions for 17 types of fossil fuels and process-related emissions from cement production.We further investigate the state of the emission peak in each city and reveal hidden driving forces.The results show that38 cities have proactively peaked their emissions for at least fve years and another 21 cities also have emission decline,but passively.The 38 proactively peaked cities achieved emission decline mainly by effciency improvements and structural changes in energy use,while the 21 passively emission declined cities reduced emissions at the cost of economic recession or population loss.We propose that those passively emission declined cities need to face up to the reasons that caused the emission to decline,and fully exploit the opportunities provided by industrial innovation and green investment brought by low-carbon targets to achieve economic recovery and carbon mitigation goals.Proactively peaked cities need to seek strategies to maintain the downward trend in emissions and avoid an emission rebound and thus provide successful models for cities with still growing emissions to achieve an emission peak. 展开更多
关键词 CO2 emissions Emission peak DRIVERS CITY Climate change
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Glyconanomaterials: Emerging applications in biomedical research 被引量:2
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作者 Xuan Chen Olof Ramstrom Mingdi Yan 《Nano Research》 SCIE EI CAS CSCD 2014年第10期1381-1403,共23页
Carbohydrates constitute the most abundant organic matter in nature, serving as structural components and energy sources, and mediating a wide range of cellular activities. The emergence of nanomaterials with distinct... Carbohydrates constitute the most abundant organic matter in nature, serving as structural components and energy sources, and mediating a wide range of cellular activities. The emergence of nanomaterials with distinct optical, magnetic, and electronic properties has witnessed a rapid adoption of these materials for biomedical research and applications. Nanomaterials of various shapes and sizes having large specific surface areas can be used as multivalent scaffolds to present carbohydrate ligands. The resulting glyconanomaterials effectively amplify the glycan-mediated interactions, making it possible to use these materials for sensing, imaging, diagnosis, and therapy. In this review, we summarize the synthetic strategies for the preparation of various glyconanomaterials. Examples are given where these glyconanomaterials have been used in sensing and differentiation of proteins and cells, as well as in imaging glycan-medicated cellular responses. 展开更多
关键词 glyconanomaterials carbohydrates IMAGING THERAPY
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