分类： 环境科学技术及资源科学技术 >> 环境科学技术基础学科 提交时间： 2020-03-01
摘要： Carbon sequestration, including geological, oceanic, and terrestrial ecosystem sequestrations, plays an important role in mitigating global warming. However, the applications of geological and oceanic sequestrations are limited owing to high costs and technique complexity. In this study, a new sequestration technique,biochar concrete, was developed. Nine different percentages (0%-30%) of biochar were used to replace cement in concrete production, and the performance and carbon sequestration of the resulting concrete were investigated. The results show that the compressive strength of the biochar concrete increased with increasing biochar amounts of 0%-5%. The strength of the biochar concrete meets the national standard for replaced cement amounts of 5%-30%. Further, the durability of the biochar concrete increased with increasing biochar amounts of 0%-25%. The porosity and water absorption of the biochar concrete exhibited a slight increase, whereas the slump experienced a slight decrease with increasing biochar amount. If biochar concrete is applied to new buildings and in the renovation of existing buildings in China, the biochar made from organic wastes that will quickly decompose and discharge 1,060,000,000 tons CO2, will be permanently sequestrated in concrete, which is equivalent to 1.5% of a standard forest area. Moreover, biochar applied to concrete can also decrease the consumption of cement; hence, saving energy and reducing the discharge of CO2 in cement production.
分类： 心理学 >> 心理学其他学科 提交时间： 2020-03-01
摘要： 借助跨通道情绪启动范式考察声乐与器乐情绪加工的电生理差异。启动刺激是声乐和器乐曲(小提琴演奏)，目标刺激是与音乐情绪一致或不一致的面孔表情图片。结果显示，与一致条件相比，与面孔情绪不一致的器乐曲诱发了N400，而与面孔情绪不一致的声乐曲诱发了LPC。这些结果表明，声乐与器乐情绪加工的电生理反应存在差异。
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