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浙江良渚古城墙铺底垫石的特征与石源分析 被引量:6
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作者 吕青 董传万 +6 位作者 许红根 王宁远 刘斌 马晓雄 顾红艳 周超 吴维维 《华夏考古》 CSSCI 北大核心 2015年第2期79-88,共10页
良渚文化是一支分布在太湖流域的古文化,距今5300—4300年。近年在良渚遗址群内发现了规模宏大的良渚古城,在古城墙底部普遍铺垫石块为地基。本文用地质调查和考古学的方法,对良渚古城墙铺底垫石进行块度、形状等测量和石料岩性鉴定... 良渚文化是一支分布在太湖流域的古文化,距今5300—4300年。近年在良渚遗址群内发现了规模宏大的良渚古城,在古城墙底部普遍铺垫石块为地基。本文用地质调查和考古学的方法,对良渚古城墙铺底垫石进行块度、形状等测量和石料岩性鉴定,并考察古城周边山体露头及冲沟滚石的岩性特征,判断铺底垫石的来源与产地。研究表明,铺底垫石普遍为次棱角状、次圆状,指示它们绝大部分经过短距离的搬运,采自古城周边山坡脚和山涧冲沟。铺底垫石共有11种岩石类型,与古城周边山体出露的岩石基本相同,说明它们来自瓶窑镇及其周边的丘陵山体。铺底垫石的性质与来源确认,对了解良渚古人利用自然资源的能力,活动范围,及当时的社会生产与组织结构等深层次研究有重要意义。 展开更多
关键词 良渚古城墙 铺底垫石 岩性特征 石源分析 余杭瓶窑 浙江
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Estimate of China's energy carbon emissions peak and analysis on electric power carbon emissions 被引量:6
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作者 WANG Zhi-Xuan ZHANG Jing-Jie +2 位作者 PAN Li YANG Fan SHI Li-Na 《Advances in Climate Change Research》 SCIE 2014年第4期181-188,共8页
China's energy carbon emissions are projected to peak in 2030 with approximately 110% of its 2020 level under the following conditions: 1) China's gross primary energy consumption is 5 Gtce in 2020 and 6 Gtce in 2... China's energy carbon emissions are projected to peak in 2030 with approximately 110% of its 2020 level under the following conditions: 1) China's gross primary energy consumption is 5 Gtce in 2020 and 6 Gtce in 2030; 2) coal's share of the energy consumption is 61% in 2020 and 55% in 2030; 3) non-fossil energy's share increases from 15% in 2020 to 20% in 2030; 4) through 2030, China's GDP grows at an average annual rate of 6%; 5) the annual energy consumption elasticity coefficient is 0.30 in average; and 6) the annual growth rate of energy consumption steadily reduces to within 1%. China's electricity generating capacity would be 1,990 GW, with 8,600 TW h of power generation output in 2020. Of that output 66% would be from coal, 5% from gas, and 29% from non-fossil energy. By 2030, electricity generating capacity would reach 3,170 GW with 11,900 TW h of power generation output. Of that output, 56% would be from coal, 6% from gas, and 37% from non-fossil energy. From 2020 to 2030, CO2 emissions from electric power would relatively fall by 0.2 Gt due to lower coal consumption, and rela- tively fall by nearly 0.3 Gt with the installation of more coal-fired cogeneration units. During 2020--2030, the portion of carbon emissions from electric power in China's energy consumption is projected to increase by 3.4 percentage points. Although the carbon emissions from electric power would keep increasing to 118% of the 2020 level in 2030, the electric power industry would continue to play a decisive role in achieving the goal of increase in non-fossil energy use. This study proposes countermeasures and recommendations to control carbon emissions peak, including energy system optimization, green-coal-fired electricity generation, and demand side management. 展开更多
关键词 Energy consumption Growth rate Carbon emissions peak Electric power development
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