Results 11 to 20 of about 987,908 (148)
, 2011 高铁安不安全?从国际的发展来看,日本从1964年开始运营,已经拥有46年安全运营历史;法国1981年开始运营,拥有29年安全运营历史;德国1991年开始运营,已有19年运营历史,其中于1998年6月3日在德国慕尼黑到汉堡的高铁线上造成101死亡、88人受伤的特大安全事故 ...
魏宇杰
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, 2004 2004年4月1日，韩国高速铁路KTX(Korea Train eXpress)在京釜线(汉城釜山)、湖南线(汉城-木浦)同时开通。这标志着韩国正式跨入高速铁路时代，继日本、法国、德国和两班牙之后，成为建设时速300km高速铁路的第5个国家。这个被称为“陆地交通的革命和自檀君以来最大的国策事业”的工程，于1992年6月破土动工 ...
金哲学
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, 2011 本月底，京沪高铁就将开通。随着新一代高速动车组的投入使用，京沪之间的千里之遥将瞬息可至。在速度、安全、通讯等方面，将有哪些看点？下面来简单谈一谈。 速度：上海到北京4小时48分钟。 按列车的运行时速为300公里，上海到北京只需4小时48分钟。在去年12月3日，在京沪高铁枣庄至蚌埠先导段上，新一代高速动车组飙出486.1公里时速，再次刷新世界铁路运营史上的最高纪录。 安全：遭遇危险时旅客可拉停车拉手 ...
中国科学院老科协工程力学分会
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT With the depletion of energy resources and the vigorous development of renewable energy technologies, the demand for efficient energy storage technologies has become increasingly urgent. Dielectric ceramics feature ultrafast charge–discharge speed, but low energy density and inferior efficiency hinder device miniaturization.
Junxuan Liu +14 more
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Sodium‐ion batteries (SIBs) offer a promising, cost‐effective alternative for large‐scale energy storage due to the abundance of sodium. However, their practical deployment is challenged by sluggish interfacial kinetics and unstable interphase formation, which severely limit performance across wide temperature ranges. Here, we demonstrate that
Mingxing Zhang +10 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Vanadium‐bearing solid wastes (VBSWs) have emerged as a key research priority in resource recovery and environmental remediation because of their high resource value, large generation volume, and complex phase composition. However, practical utilization of these wastes still faces major challenges, including heavy environmental burdens, ill ...
Bowen Duan +7 more
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Gongye shui chuli, 2007 为研究高铁酸钾与紫外-可见光/二氧化钛(UV-vis/TiO2)光催化的协同氧化效应，以氨氮为目标物，研究了高铁酸钾、UV-vis/TiO2光催化以及高铁酸钾与UV-vis/TiO2光催化联用对水中氨氮的去除效果。结果表明，在高铁酸钾与UV-vis/TiO2光催化联用的条件下，在pH=8.0，温度为室温，反应时间为30min，氨氮质量浓度50mg/L，高铁酸钾、TiO2投加质量浓度分别为20、200mg/L时，水中氨氮的去除率为97.5%，比单独的高铁酸钾或UV-vis/TiO2最大去除率分别提高了22.
郗丽娟 +6 more
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Gaoya dianqi, 2022 随着我国高速铁路的广泛延伸，直流接地极与高速铁路相接近的情况时有发生。直流接地极入地电流可能会对高速铁路综合接地系统造成影响。为了评估直流接地极对高速铁路综合接地系统的影响情况，文中建立了高速铁路综合接地系统的直流电流分布的分析模型，获得了高速铁路沿线轴向直流电流分布和单位长度泄漏电流密度分布，说明了直流接地极对高速铁路综合接地系统的电腐蚀影响机理，并分析了土壤电阻率、直流接地极距离等因素对电腐蚀程度的影响。研究结果表明，直流接地极对高速铁路综合接地系统有一定的电腐蚀影响 ...
宋伟 +4 more
doaj
Enhanced Oxygen Reduction Reaction Performance of Fe‐N4 Single‐Atom Catalysts Through Fe3C Coupling
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Understanding the electronic factors contributing to the high oxygen reduction reaction (ORR) activity of Fe‐N4 sites remains a significant challenge due to the localized Fe 3d orbitals and their sensitivity to the coordination environment.
Shichang Cai +19 more
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Electrically Switchable Altermagnetism in Monolayer MoCl3
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Altermagnets intertwine spin‐split bands with vanishing net magnetization, offering great potential for high‐density, stray‐field‐free spintronic devices. However, their development is hindered by both material scarcity and difficulties in external control due to their intrinsic symmetry protection.
Zhengming Zhang, Zhenyu Fan, Dunhui Wang
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