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杂质元素特征X射线对氢气放电源打靶新谱线的影响
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作者 秦建国 王大伦 赖财锋 《强激光与粒子束》 EI CAS CSCD 北大核心 2009年第7期961-969,共9页
在氢气放电源打靶的实验中,测到了系列能量恒定不变的低能X射线新谱线,这些新谱线的能量分别为(1.70±0.10)keV,(2.25±0.07)keV,(2.56±0.08)keV,(3.25±0.10)keV和(3.62±0.11)keV,与Si,Ta,S,Cl,K和Ca等元素的特... 在氢气放电源打靶的实验中,测到了系列能量恒定不变的低能X射线新谱线,这些新谱线的能量分别为(1.70±0.10)keV,(2.25±0.07)keV,(2.56±0.08)keV,(3.25±0.10)keV和(3.62±0.11)keV,与Si,Ta,S,Cl,K和Ca等元素的特征X射线能量相近,但靶中所含的杂质或来自放电室的杂质元素可能会产生这些能量的X射线谱峰,证实新谱线是否由这些元素的特征X射线干扰所致显得尤为重要。分析了本实验系统中各种杂质的可能来源,论证了放电室端杂质对新谱线的影响,及靶材料中体杂质和面杂质对新谱线的影响;用X射线光电子能谱仪对靶做了表面分析。研究结果表明:杂质元素的特征X射线不会对氢气放电源打靶产生的新谱线有影响。这些新谱线的性质有待进一步的实验研究。 展开更多
关键词 特征X射线 氢气 新谱线 气体放电源
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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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Biogas Perspectives in Livestock Sector in Brazil and the United States: Electric, Thermal and Vehicular Energy Use
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作者 Janaina Camile Pasqual Harry Alberto Bollmann Christopher Scott 《Journal of Agricultural Science and Technology(A)》 2017年第4期258-273,共16页
The demand for energy, water and food will continuously increase, as the prediction states that 2.5 billion people will be added to the world population by 2050, representing not only an increase in the consumption bu... The demand for energy, water and food will continuously increase, as the prediction states that 2.5 billion people will be added to the world population by 2050, representing not only an increase in the consumption but also more waste production, greenhouse gas (GHG) emissions and depletion of natural resources. Taking into account that renewable sources of energy can help to overcome these challenges and diversify the energy matrix in the countries, this paper aims at analyzing the biogas potential in Brazil and the United States, especially in the livestock sector, and its benefits in the environmental, social and economic aspects. Both countries are among the top five countries globally in terms of water availability, energy consumption and food production. Until 2050, the world consumption of meat will have a significant increase: 206% of poultry meat, 56% of pork meat and 47% of beef meat, augmenting the need for sustainable management of waste and manure. This scenario can become a sustainable opportunity for biogas implementation, which provides multiple economic, environmental and social benefits for farmers, businesses and communities, including production of electrical, thermal and vehicular energy, production of high-quality biofertilizer, reduction of ground and surface water pollution and reduction of GHG emissions, and foments new income for the farmers, among others. A new concept is presented in this article to make biogas systems feasible, i.e., biogas condominiums, as small and medium-scale farms by themselves usually would not be able to afford the investments. This arrangement can bring benefits for the whole biogas supply chain that includes farmers, agroindustry, providers and local community. 展开更多
关键词 Biogas condominiums BIOMETHANE LIVESTOCK climate changes.
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