Results 21 to 30 of about 304 (158)
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT The development of high‐performance electromagnetic protection materials integrating broadband absorption and effective shielding capabilities is hindered by challenges in simultaneously optimizing multiple electromagnetic properties through conventional material designs.
Changlong Du +9 more
wiley +1 more source
Dianci bileiqi, 2021 当风力发电机的机舱受到雷击时,机舱内会产生雷电电磁脉冲(LEMP),继而影响电子设备运行,甚至严重破坏电子设备。为了研究机舱内的LEMP,首先建立了非金属机舱的全尺寸模型。采用传输线矩阵法对机舱内雷电电磁环境进行了模拟分析。然后研究了在机舱上应用金属屏蔽网的防护措施,包括屏蔽网的网格尺寸和材质对防护效果的影响。结果表明,金属屏蔽网可以有效地降低机舱内的LEMP。屏蔽效果很大程度上取决于屏蔽网材料的导电性和网格尺寸。
周歧斌 +3 more
doaj
Research for Automatic Gain Control System of Infrared Remote Receiver [PDF]
, 2016 红外遥控接收头是红外遥控技术的核心器件，起到接收红外遥控信号，并进行光电转换，滤波和解调的作用。对噪声干扰的抑制能力，和对不同类红外遥控协议的兼容能力是红外遥控接收头最主要的性能，而二者在一定程度上是对立的，因此研制出具有优秀噪声抑制能力和较好红外遥控协议兼容能力的红外遥控接收头是行业内共同的课题。 本文首先简单介绍了红外遥控接收头的结构和工作原理，分析其主要的抗干扰机制，突出自动增益控制电路的核心作用。然后通过对常见光干扰源的测试分析，将各类干扰噪声和遥控编码就数据间隔等四项基本参数进行汇总对比 ...
段果
core
Weak current phenomenon in stressed coal and its prospective applications in early warning for coal and rock dynamic disasters [PDF]
In this study, some loading experiments were conducted on coal specimens using the established weak current testing system to investigate the effects of weak currents in coals.
Dexing LI +3 more
core +1 more source
MXene‐Based Electromagnetic Attenuation Materials in Microwave and Terahertz Bands
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT MXenes exhibit considerable potential for developing high‐performance electromagnetic (EM) shielding and absorption materials operating across microwave and terahertz frequencies, due to their tunable surface chemistry and exceptional charge carrier transport properties.
Guozheng Zhang +9 more
wiley +1 more source
Verification experiment of the direction of the displacement currents by core solenoid [PDF]
, 2013 在实验上直接地验证位移电流的幅值和方向是人们长期以来的奋斗目标。近年来随着测量技术的发展使这种可能性逐步地成为现实。一些学者已经在实验上直接地测量了位移电流的幅值。但目前仅限于位移电流幅值的测量，从未测量过位移电流的方向。本课题组于2010年首先提出在实验中直接测量位移电流的方向的设想，随后提出了几个实验方案并开展了相关的实验研究。 本文采用两种实验方案验证位移电流的方向。分别采用Fammeter传感器（方案一）和单个微晶磁芯传感器（方案二）直接测量在钛酸钡电容器中产生的位移电流方向。在以往的研究中 ...
朱金攀
core
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Considering the multiple challenges faced by stealth coatings in complex service environments, the development of multifunctional integrated microwave absorbing materials (MAMs) that combine efficient electromagnetic (EM) attenuation with environmental tolerance has become an urgent need. In this work, coral‐like CoNi@Void@C microparticle (MP)
Jiale Wu +8 more
wiley +1 more source
Dianci bileiqi, 2017 针对雷电波通过传输线在不同孔缝屏蔽腔内对电子设备造成损坏等问题,通过对孔缝屏蔽腔体屏蔽效能的理论分析,并采用（impulse current generated system,ICGS）雷电冲击平台模拟8/20μs波形的雷电流,对不同孔径的屏蔽腔体进行试验分析。试验表明:金属屏蔽腔体对1.75 GHz雷电电磁信号的屏蔽效能与2.5 GHz的雷电电磁波相比,其屏蔽效果更好;当屏蔽腔体表面的孔缝直径为30 mm时,腔体对雷电电磁波的屏蔽效果最好,范围为16.5 dB18 dB ...
李月英, 苏丽敏, 周文
doaj
A Research on Competition Strategy of Chomerics Company [PDF]
, 2016 本文介绍的Chomerics公司是一家专做电磁屏蔽材料和导热材料的美国公司，公司产品广泛应用于电信、数据通讯、手机、IT、网络设备、通用电子装置、航空航天、国防军工、汽车以及医疗设备等领域，目前在全球市场保持前三的地位，但是最近5年以来公司的业绩徘徊不前，公司业绩增长速度落后于所在市场的需求增长速度，某些重要市场面临重大挑战。 本文以竞争战略分析的步骤，对Chomerics公司的竞争战略进行了系统的分析和研究。笔者梳理了竞争战略的相关理论，运用PEST分析剖析Chomerics公司所处宏观环境 ...
袁方
core
Carbon Material Films for Flexible and Efficient Electromagnetic Interference Shielding: A Review
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT With the rapid development of technology such as the Internet and electronic devices, electromagnetic radiation pollution has become an increasingly prominent issue, which negatively impacts both human health and the normal operation of equipment.
Yu‐Xin Chen +10 more
wiley +1 more source