Results 31 to 40 of about 803,141 (171)
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Sodium metal batteries hold significant promise for large‐scale energy storage due to the high theoretical capacity and abundant sodium sources, yet sodium‐metal anodes are hindered by dendrite propagation, unstable solid electrolyte interphase, and poor cycling efficiency arising from uneven Na deposition and volume changes.
Nan Xing +7 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2009 目的通过监测高血压合并冠心病老年患者24 h动态血压,分析相关参数变化的临床意义,为临床治疗提供诊断依据。方法将试验对象分为三组:高血压合并冠心病组,86例;单纯性高血压组,127例;正常对照组,83例。应用无创动态血压监测系统记录动态血压及相关参数,并作对照分析。结果高血压合并冠心病组收缩压和舒张压比单纯性高血压患者高 ...
周智, 吴燕华, 周航
doaj
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Magnesium (Mg)‐based composites are regarded as promising lightweight materials with significant potential for structural applications. The structure–property relationships of bionic Mg‐based composites remain unclear. Herein, three honeycomb‐like Mg‐Fe composites are fabricated to uncover the underlying strengthening mechanisms.
Fan Zhang +5 more
wiley +1 more source
Gaoya dianqi, 1971 近年来,为了适应电力系统向超高压及特高压方向发展,地下变电站的发展,以及高压电器简化结构,提高技术经济指标和运行可靠性的要求,各国十分重视高压试验研究。其研究内容多偏重于以下几个方面:超高压电力系统中内过电压的研究;在操作过电压作用下绝缘特性的研究;1000仟伏以上交流高压输电及相应的高压电器绝缘结构的技术探索;在操作过电压作用下避雷器放电特性的研究;高压电力系统及共电器设备绝缘配合的研究 ...
史文科
doaj
紫苏籽油的抗衰老作用及机制探究 Anti-aging effect and mechanisms of perilla seed oil
Zhongguo youzhi旨在为紫苏籽油的开发利用提供理论依据，以D-半乳糖（500 mg/kg）在小鼠颈背部皮下连续注射4周建立小鼠衰老模型后，将小鼠随机分为模型对照组（生理盐水）、阳性对照组（维生素C 200 mg/kg）和紫苏籽油高（5 mL/kg）、中（2.5 mL/kg）、低（1.25 mL/kg）剂量组，连续灌胃4周，记录小鼠体质量及行为变化，通过转棒法和金属网法检测小鼠的协调运动能力，测定小鼠主要脏器（脑、胸腺、脾脏）指数以及小鼠血清和脑组织匀浆中谷胱甘肽过氧化物酶（GSH-Px）活力和丙二醛（MDA）含量 ...
王荣1,2,3，王娜娜1,2,3，杨宽1,2,3，刘自群1，秦蓓1,2,3 WANG Rong1,2,3，WANG Nana1,2,3， YANG Kuan1,2,3， LIU Ziqun1，QIN Bei1,2,3
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Giga‐casting, a near‐net‐shape manufacturing process widely used in sectors such as new energy vehicles and aerospace, demands aluminum alloys with high integration, efficiency, and comprehensive performance. However, traditional die‐cast alloys still face two core bottlenecks: the strength–ductility trade‐off and high‐temperature ...
Zhanwei Su +3 more
wiley +1 more source
, 2014 本发明公开一种高压自动泄压系统，该系统包括：压力变送器；通过压力变送器与压力容器相连的压力显示仪表；接收压力显示仪表的反馈信号的取反电路；能对取反电路的输出进行强控制的开光电路；接收取反电路信号的驱动电路；输入端接驱动电路，导通后能对压力容器泄压的电（气）动阀门。本发明通过压力容器内的压力变化来控制阀门的开关，起到一旦压力容器超过设定压力，就自动泄压的作用。并且可以用到其他需要高压自动泄压的装置。还具有结构紧凑小巧，费用低廉，安全可靠 ...
唐书凯 +8 more
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Gaoya dianqi, 2011 1000kV电压互感器是实现特高压电网电能计量及电网保护的关键设备,中国特高压工程所采用的1000kV电压互感器均为自主研制,如用于敞开式变电站的柱式电容式电压互感器,用于GIS站的罐式电容式电压互感器、罐式电磁式电压互感器和电子式电压互感器等。为提高特高压电压互感器技术水平,总结研究经验,笔者介绍了适用于特高压敞开式变电站和特高压全封闭气体绝缘变电站（GIS）的1000kV电压互感器类型及原理,描述了中国特高压工程中1000kV电压互感器样机研制进展 ...
李璿, 王晓琪, 余春雨, 吴士普
doaj
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Arsenic presents a critical duality as both a hazardous environmental pollutant and an indispensable material for advanced semiconductor technologies. This study proposes an integrated reductive vacuum sublimation strategy, assisted by carbon and lead additives, to purify crude arsenic containing high oxygen (7.4%) and antimony (1326 mg kg−1).
Hongrui Xiang +6 more
wiley +1 more source
, 1996 越宽。由于采用高电压输出损耗小,所以高电压和超高电压输电线路发展很快,西方发达国家的高压输电线路电压已超过800kV,我国目前的高压输电线路电压也已超过500kV。为保证高压线路安全运行 ...
曹树祥
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