Results 31 to 40 of about 1,398,080 (98)
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
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Fluxgate sensors with Co‐rich amorphous microwires, widely used for their low noise in magnetic field measurements, encounter significant challenges in high‐temperature environments such as well drilling and geological exploration. Prolonged thermal aging degrades the performance of Co‐rich amorphous microwires, resulting in increased noise ...
Lining Pan +10 more
wiley +1 more source
, 2014 本实用新型提出了一种用于高速目标测量的大视场高帧频系统，包括依次连接的前端成像单元、FPGA逻辑控制电路单元、DSP信号处理电路单元以及供电电路，供电电路分别与前端成像单元、FPGA逻辑控制电路单元、DSP信号处理电路单元连接。本实用新型用于高速目标测量的大视场高帧频系统，用于高速目标捕获跟踪系统 ...
李瑛 +5 more
core
, 2015 主动再生冷却是对超燃冲压发动机进行冷却的一种十分有效的冷却方式,吸热型碳氢燃料由于具有较高的物理和化学热沉而被认为是最优潜力的燃料。本文针对发动机燃料供给系统的动态变化特性,建立了高温燃油供给管道零维模型,采用频域特性方法研究了供油系统在超临界条件的动态特性,并分析了不同结构参数时动态特性参数的变化过程。最后,基于高温燃油加热实验台进行了对比实验,实验结果验证了频域分析结果的准确性 ...
刘祥灿 +5 more
core +2 more sources
Gaoya dianqi, 2018 特高频（ultra-high frequency,UHF）检测因其可有效避免现场噪声干扰,在气体绝缘全封闭组合电器（gas insulated substation,GIS）中具有广泛应用,但工程上尚未明确针对不同频带特高频信号检测装置的标定方法。文中设计了一种GIS局部放电标定平台,由局部放电模拟脉冲信号源、同轴阻抗过渡段、同轴信号标定段、同轴阻抗匹配段、高速示波器和特高频传感器组成。其中,3通道局部放电模拟脉冲信号源,可分别输出上升沿240 ps、460 ps、1 ns的脉冲信号波形,用于模拟尖刺 ...
牛博 +5 more
doaj
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Regulating negative parameters of metacomposites is mainly limited by their unclear mechanisms, which affects their practical applications in new sensing, communication, electromagnetic (EM) protection and other fields. This work proposes a dual‐functional competitive design strategy based on the waste corncob‐derived carbon/polyaniline ...
Qiuyun Yang +4 more
wiley +1 more source
, 2013 本发明提出了一种用于高速目标测量的大视场高帧频系统，包括依次连接的前端成像单元、FPGA逻辑控制电路单元、DSP信号处理电路单元以及供电电路，供电电路分别与前端成像单元、FPGA逻辑控制电路单元、DSP信号处理电路单元连接。本发明用于高速目标测量的大视场高帧频系统及方法，用于高速目标捕获跟踪系统 ...
李瑛 +5 more
core
, 1982 高频感应等离子体技术是近十多年发展起来的一门新技术,由于它具有无电极污染,弧区大,温度均匀,能提供纯净热源,工质不受限制等特点,在化工、冶金等工业和各个科学技术领域中有着潜在的应用前景.因为过去对能够稳定并控制热等离子体流的某些方法和装置,以及对高频放电理论,等离子体动力学进行了卓有成效的研究 ...
朱清文
core +2 more sources
Gaoya dianqi, 2013 笔者对GIS局部放电与等效脉冲注入过程中的特高频信号一致性进行了试验研究。通过测量等效脉冲注入和局部放电信号的电磁波波形,发现传感器耦合到的特高频信号波形相似;在相同试验条件下,局部放电信号与等效脉冲注入产生的特高频信号衰减规律和传播范围相同。试验结果表明,局部放电与等效脉冲注入过程中产生的特高频信号一致性很好。在此基础上,通过建立等效脉冲幅值与局部放电量之间的对应关系,可用于GIS局部放电特高频在线监测装置现场校验。
李兴旺 +4 more
doaj
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Wildlife tourist attractions (WTAs) can permit interactions between humans and wildlife that are detrimental to the animals’ welfare and species conservation. Social media portraying human–wildlife interactions could affect people's perceptions of their acceptability and desirability or stimulate demand for detrimental practices.
T. P. Moorhouse, A. Elwin, N. C. D'Cruze
wiley +1 more source