Results 41 to 50 of about 7,111 (168)
The Technology Research and Development of Snap-in Aluminum Electrolytic Capacitor [PDF]
, 2013 铝电解电容器与其它薄膜电容器、陶瓷电容器等相比具有大容量、成本低等 优点，使其在工业设备、消费电子等产品有着广泛的应用。 焊片式铝电解电容器的结构主要是金属外壳包裹住的芯子，两个引出端分别 接盖板的正负极焊针，基本电气性能参数包括电压、容量、ESR、损耗角正切、 阻抗、漏电流等。应用在交流设备的场合还要求纹波性能。 焊片式铝电解电容器的原材料有带一定化成电压和静电容量的阳极箔、阴极 箔、电解纸、电解液、盖板、铝壳、套管和底垫等。本文从电容器的设计的三个 方面出发，一方面从结构出发研究了电容器的结构设计 ...
邱小波
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Electromagnetic environment prediction and safety risk analysis of civil communication leakage coaxial cables in subway tunnels [PDF]
This study aimed to address the limitations of traditional electromagnetic numerical calculation methods in large-scale radio frequency (RF) space fields, accurately predict the electric field intensity of wireless communication signals in subway tunnels,
ZHAO Jiqing, ZHOU Wenying
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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
Dianci bileiqi, 2019 论述了直流氧化锌压敏电阻片烧结过程中降温速率对其电气性能的影响,从直流电阻片的老化、伏安特性、温度系数、荷电率、吸潮性等方面对直流电阻片的电气性能进行了探究。实验结果表明:从高温点降到970℃,平均降温速率为27℃/h,从970℃降到870℃,平均降温速率为40℃/h,从870℃降到840℃,平均降温速率15℃/h,直流电阻片的各项电气性能参数较优。
田冰, 朱成洋, 郭向洋
doaj
The Innovation of Operations Mode for PCB Design Enterprise and Its Effects on the Industrial Competitiveness in Future [PDF]
, 2008 印制电路板（PCB）是电子元器件的主要载体，是构成所有电子产品的重要基础。近年来，我国电子产业高速发展，电子产品也正从传统的模拟电路为主转向高密度、高精度、高频率的个人消费数码产品和工业用高集成控制板，但不可否认的是，整个PCB产业链正在面临着行业竞争加剧，利润快速下降的局面。 作为电子设计制造服务的重要环节的PCB设计，同样也面对着电子产业高速发展，国内个人电子产品消费水平提高的机遇和电子设计服务业竞争加剧的挑战。PCB设计服务商除了提高自身的技术水准，引入更新 ...
连捷
core
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
Study on Tungsten Carbide Production Technology for Micro PCB Drills [PDF]
, 2017 印刷电路板（PCB）是电子通信信息化和电气自动化发展的基石，并且随着工业自动化的升级，人工智能的开发，PCB的市场将无可限量。目前PCB市场低端产品同质化严重，价格竞争激烈，高端产品追求更小的体积更快速稳定的电信号传输速度，但是加工难度大、成本高。降低PCB加工成本成为了PCB厂家的提升市场竞争力的重点之一。 PCB加工成本中30～40%是孔加工，因为PCB孔质量影响着电信号传输的稳定性，需要较高的加工要求，比如：孔位精度高，孔壁质量好。同时PCB孔加工刀具成本也较铣刀高 ...
王年
core
Plasma‐Boosted Bi2Mn4O10 Electrocatalysis Enables Real‐Time On‐Board Monitoring of CO2 in Exhaust
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Real‐time monitoring of CO2 concentration in automobile exhaust is critical for effective carbon emission reduction. However, the inherently inert nature of CO2 poses a significant challenge for achieving accurate and efficient detection in the exhaust automobile environment.
Aining Jiang +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Chemically self‐charging aqueous zinc‐ion batteries (AZIBs) have emerged as promising candidates for energy storage technologies owing to their environmental autonomy and structural simplicity. Nonetheless, the self‐charging performance is significantly compromised by the limited potential difference between cathodes and oxygen, as well as the
Yan Wang +5 more
wiley +1 more source
IEC 61643-311气体放电管新旧版本标准的比较和分析
Dianci bileiqi, 2014 国际电工委员会（简称IEC）于2013年4月发布了IEC 61643-311:2013"低压电涌保护器元件第311部分:气体放电管的性能要求和测试回路",该标准取代了IEC于2001年10月发布的原IEC 61643-311。通过对新旧版本标准的比较,对气体放电管性能要求和测试方法进行深入分析,认为新版标准扩展了气体放电管（GDT）应用领域,强化了气体放电管（GDT）技术安全性能,有利于提高开关型电涌保护器的安全性和可靠性。
赵洋, 行鸿彦, 刘非凡
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