Results 51 to 60 of about 9,587 (155)
Rare Metals, Volume 44, Issue 6, Page 3772-3783, June 2025.Graphical abstract AbstractDeveloping effective heterostructure strategies to mitigate the shuttling effect and accelerate lithium polysulfide (LiPS) conversion remains a critical challenge in lithium–sulfur (Li–S) batteries. Here, we report the first carbon–free VO2–VS2 heterostructure material synthesized via in situ sulfurization, applied as a ...
Yao‐Lin Hou +6 more
wiley +1 more source
Dianci bileiqi, 2021 为了分析分层土壤模型下大型接地网的冲击特性参数分布规律,包括暂态地电位升、接触电压和跨步电压等,结合在陕西渭南市某地测量土壤电阻率试验的基础上,通过CDEGS软件建立了分层土壤模型下的大型接地网常规设计模型,并针对模型进行了30 kA雷电流冲击特性仿真,得到了大型接地网在雷电流入侵时的地电位升分布,并针对常规接地网的设计提出了两种不同的优化方案,以尽可能降低雷电流流入接地网时的地电位升,使地电位升分布均匀,比较得出一种优选方案,可作为大型接地网工程设计的参考建议,具有一定的工程实用价值。
王森 +6 more
doaj
Dams in intrastate ethnic conflict: A comparison of Turkey and Ethiopia
World Water Policy, Volume 10, Issue 4, Page 1044-1065, November 2024.Abstract Why do dams exacerbate ethnic conflict in Turkey but not in Ethiopia? This paper analyzes the impacts of a growing push to develop water resources through hydroelectric dams, which promise clean energy, jobs, and economic opportunities. Yet dam building also causes environmental degradation, mass relocation, the flooding of historical sites ...
Alex Bezahler
wiley +1 more source
Dianci bileiqi, 2018 为提高±800 kV哈郑直流输电线路接地系统的技术经济性,在输电线路杆塔反击耐雷性能和人身安全分析的基础上,提出了取消人工接地体而采用基础独立接地所需的接地电阻与接触、跨步电位差的控制目标,对典型杆塔基础接地体的接地电阻和电位差进行了计算,获得了接地电阻和电位差与土壤电阻率的关系,据此提出了满足接地电阻和电位差目标的土壤电阻率范围。结果表明:不需要考虑接触和跨步电位差的野外地区,在西北少雷区,可采用基础独立接地的最大土壤电阻率可达1 700Ω·m以上,在非西北少雷区,最大土壤电阻率通常在1 000Ω ...
童雪芳, 周沛洪, 范冕
doaj
Policy &Internet, Volume 16, Issue 3, Page 485-508, September 2024.Abstract During the COVID‐19 pandemic, some groups and individuals rearticulated state power through conspiracy theories. Despite their fringe status, conspiracy theory beliefs can directly animate citizen's engagements with institutions. Drawing on Barkun's ‘conventional’ and ‘stigmatised’ knowledge types, we analyse the appearance of conspiracism in ...
Ben Lyall, Patrick Marple
wiley +1 more source
基于ATP-EMTP高阻地区变电站地电位升安全限值的确定方法
Dianci bileiqi, 2019 高土壤地区通常需要通过降阻来满足工程对接地电阻及地电位升的要求,但在某些地区采取措施后仍不能达到安全要求。依托某500 kV变电站接地网设计工程,在避雷器安全性分析的基础上,研究并提出了提高变电站地电位升限值的方法。首先,通过仿真计算软件ATP-EMTP建立了500 kV变电站地电位升高引起的氧化锌避雷器反击模型,进而计算地电位升高时避雷器的能量吸收;其次使之与避雷器允许最大流通容量进行对比,得到避雷器耐受地电位升值;最后校验了二次电缆、接触电压和跨步电压的安全性能,得出了本站地电位提升可行的结论。
邵松涛 +4 more
doaj
World Water Policy, Volume 10, Issue 3, Page 971-985, August 2024.Abstract Quality water is essential to people's health and social and economic well‐being. Evaluation of the quality of the water sources provides benchmark data on quality status and insights into the development of further protective measures. A laboratory‐based cross‐sectional study design was conducted in the diarrheal hotspot area of the North ...
Tsegahun Asfaw Abebe +5 more
wiley +1 more source
Rare Metals, Volume 43, Issue 8, Page 3702-3712, August 2024.Graphical abstract AbstractThe highly reversible insertion/extraction of large‐radius K+ into electrode materials remains a tough goal, especially for conversion‐type materials. Herein, we design a current collector‐integrated electrode (N–CoSe/CoSe2–C@Cu) as an advanced anode for potassium‐ion battery (PIBs).
Zi‐Jie Mu +9 more
wiley +1 more source
Gaoya dianqi, 2019 现有基于地表电位的接地网故障诊断需要测量大量的现场数据,为在减少现场测试工作量的同时提高接地网地表电位分布计算的准确性,文中提出了基于回声状态网络的接地网地表电位计算方法。首先利用接地网地表电位计算结果对回声状态网络进行训练,然后根据接地网结构对其进行网孔划分,最后使用少量的现场测试数据输入到每个区域的回声状态网络模型来计算得到接地网的整体地表电位分布。计算结果与某接地网模型的试验结果表明,文中所提方法能得到特定网孔处的接地网地表电位分布计算模型,据此可得到较为准确的接地网地表电位分布 ...
盛青 +5 more
doaj
Dianci bileiqi, 2018 变电站接地系统是确保电气设备及人身安全的重要设施,控制电缆连接一次设备与二次设备,其安全性能影响着二次系统的稳定运行。基于不等电位的节点电压法,研究了带有双端接地电缆的地网参数计算模型,并通过matlab编写程序对电缆芯线-屏蔽层电位差进行仿真分析。研究结果表明:芯线-屏蔽层电位差受土壤电阻率影响较小,受电缆长度与地电位升影响较大;在电缆沟中并联铺设铜接地带能有效保护电缆及电气设备安全;综合二次系统绝缘耐受电压与电缆接地方式,可将地电位升提高到5 kV甚至更高。
史柳, 刘骐, 胡全义, 鲁志伟
doaj