Results 41 to 50 of about 13,859 (169)
Major and trace-element zoning in metamorphic garnets and their metamorphic process implications [PDF]
, 2003 This article introduces some of the modern techniques for analyzing compositional zonings/profiles in metamorphic garnet, emphasizing the significance of two-dimensional composition X-ray mapping for such investigations.
Chen, NS +4 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT In conventional piezoceramics, the coordinated change between the dielectric constant (εr) and the piezoelectric charge constant (d33) usually limits the piezoelectric voltage constant g33 (g33 = d33/εr), a critical figure of merit for piezoelectric sensors.
Xiaoying Feng +7 more
wiley +1 more source
Qualitative and Quantitative Analysis of Mercury Ion in the water environment Using Surface-enhanced Raman Spectroscopy [PDF]
, 2015 汞（mercury）元素是人体非必需的元素，其单质和化合物均具有很高的生物毒性，且能通过食物链进行生物转化和富集而引发各种疾病。汞离子（Hg2+）含量的检测是研究其毒理效应的前提，在环境和生命等科学研究中有非常重要的意义。 拉曼光谱通常用于分子结构的研究，非常弱的拉曼光谱信号限制了拉曼光谱的定量分析应用。表面增强拉曼光谱（Surface-enhancedRamanScattering，SERS）相比于普通的拉曼光谱具有高灵敏度被用于环境和生物分析领域，其中SERS方法对Hg2 ...
吴玉超
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Lung cancer remains the leading cause of cancer‐related deaths worldwide, yet immune checkpoint blockade (ICB) is often compromised by an immunosuppressive tumor microenvironment (TME) with acidosis, hypoxia, and poor T cell infiltration. Here, we develop a TME‐responsive nanoplatform (MgH2@Lip/PD‐L1) that couples hydrogen gas therapy with PD ...
Xuyu Gu +5 more
wiley +1 more source
Gaoya dianqi, 2012 在脉冲功率系统中,储能电容器的保护至关重要,采用保护电感是目前主要使用的方法之一。笔者对保护电感在使用中出现的炸裂问题进行了研究,结果表明,电容器短路和电感本身的结构都可能导致电感损坏,通过对电感损坏的2种原因进行分析讨论,得出了在电路中加装避雷器和改变电感引线结构2种解决方式,并对新的方案进行了试验和仿真,结果表明,新的电感运行状态良好。
彭波 +6 more
doaj
A Multifunctional Reducing Molecular Dopant for 16% Efficient Tin Perovskite Solar Cells
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Although lead‐based photovoltaics have seen remarkable progress, tin‐based perovskite solar cells (Sn‐PSCs) continue to face challenges due to their limited power conversion efficiency and insufficient operational stability. The primary cause of this performance gap is the susceptibility of Sn2+ to oxidation, which promotes rapid defect ...
Xianyong Zhou +12 more
wiley +1 more source
Gaoya dianqi, 2009 中压电子式电压互感器和电流互感器在试验和运行中暴露出了一系列的问题,笔者主要针对电子式电流互感器的饱和特性以及电子式电压互感器的温度特性进行讨论。非线性励磁特性的电流互感器通常都是由闭合铁心制成的,在大多数情况下,由于在过渡状态中铁心饱和,而使这种电流互感器变换一次电流的周期性分量产生的误差大大超过容许值。同时分析铁心带气隙的电流互感器,总结了铁心有非磁性气隙的特点。介绍了基于电阻分压原理的电子式电压互感器的原理及结构,分析了影响其温度特性的因素 ...
万雄, 张贵新, 王强, 王鹏
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The study of bidirectional DC-DC converter in the DC microgrid [PDF]
, 2016 作为新能源的有效利用方式之一的直流微电网没有无功功率的损耗，不需要跟踪频率和相位，可靠性和可控性有较大程度的提高，更适合分布式能源的接入和应用。双向DC-DC变换器承担着母线与储能之间能量双向流动的重要作用。同时，它还可以作为直流微电网之间的互联元件，具有十分重要的研究价值。 本文针对全桥拓扑结构的双向DC-DC变换器展开较为深入的研究。 首先，详细分析了在移相控制方式下，双向DC-DC变换器的在降压方向和升压方向的工作原理及零电压开关（ZVS，Zerovoltageswitching）的具体过程 ...
纪承承
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT High‐power piezoelectric ceramics which have a wide operating temperature range are essential for sensor and actuator applications in extreme conditions. However, their development is fundamentally hindered by the inherent trade‐off among key parameters (TC, d33, Qm).
Rui Yan +10 more
wiley +1 more source
Gaoya dianqi, 2013 在线监测电涌保护器漏电流,判断其失效程度,减少因雷电和电力需求增加引起的电涌造成电气设备损失。提出了一种基于互感型电流传感器的电涌保护器失效程度在线监测的方法,建立了雷电电流和电流传感器数学模型,分析了线圈匝数、负载电阻和杂散电容对电流传感器测量精度和抗冲击性影响,采用雷击和被测电流叠加后的复合信号作为激励,仿真研究了参数优化后电流传感器的时域响应特性。实验证明,在0.2～9 mA的电流测量范围内,笔者设计的互感型式电流传感器可抵抗50 kA大电流冲击,电流测量误差小于0.11 mA ...
苏成志 +3 more
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