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土木工程在2019年底全球爆发新型冠状病毒肺炎(COVID-19)疫情后将背负起城市综合韧性防灾抗疫建设的重大使命.该文提出了融合中国城市疫情防控的需求和城市地下空间的防灾抗疫韧性性能优势的综合发展方案,指出在城市地下空间进行疫情应急防控具有的安全稳定、与应急医疗条件相适应、可作为低能耗地下应急物资储藏仓库、可作为政府... 相似文献
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进度控制是核电项目总承包"三大控制"中的关键,进度数据库系统的引入有利于提高核电工程进度管理的水平。本文从该数据库系统的意义、设计原则、技术方案、开发过程进行了阐述与研究,并应用于中国核电工程有限公司EPC总承包项目,总结了经验并提出了未来发展的目标。 相似文献
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Qiu Tong 《Frontiers of Physics》2015,10(5):106102
The realization of rapid and unidirectional single-file water-molecule flow in nanochannels has posed a challenge to date. Here, we report unprecedentedly rapid unidirectional single-file water-molecule flow under a translational terahertz electric field, which is obtained by developing a Debye doublerelaxation theory. In addition, we demonstrate that all the single-file molecules undergo both stable translation and rotation, behaving like high-speed train wheels moving along a railway track. Independent molecular dynamics simulations help to confirm these theoretical results. The mechanism involves the resonant relaxation dynamics of H and O atoms. Further, an experimental demonstration is suggested and discussed. This work has implications for the design of high-efficiency nanochannels or smaller nanomachines in the field of nanotechnology, and the findings also aid in the understanding and control of water flow across biological nanochannels in biology-related research. 相似文献
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