Results 31 to 40 of about 749,626 (175)
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Developing multifunctional luminescent materials with tunable spectra is crucial for plant lighting and information–security applications. To address the critical requirement of plant photosynthesis for blue and red spectral components, a novel lead‐free double perovskite Cs2NaGdCl6: Sb3+, Pr3+ phosphor was designed and synthesized via a ...
Huangyao Chen +7 more
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Gaoya dianqi, 2009 笔者建立了压敏电阻的仿真模型以及组合波耦合网络的MATLAB仿真电路,研究了电容耦合和压敏电阻耦合方式对组合波短路电流波形参数的影响规律。耦合电容的加入使组合波短路电流的波前时间和半峰值时间减小,回路虚拟阻抗增加,且随着耦合网络的耦合电容容量的增加,短路电流波的波前时间和半峰值时间增加,虚拟阻抗减小;压敏电阻耦合对组合波短路电流的影响规律和电容耦合相同,对于同一规格压敏电阻,随着电容上充电电压的增加,短路电流波的波前时间和半峰值时间增加,虚拟阻抗减小。在电容上充电电压相同情况下,随着压敏电阻通过直流1 ...
姚学玲, 陈景亮, 孙伟
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Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters
Functional Ecology, Volume 40, Issue 5, Page 1443-1460, May 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Jellyfish blooms are increasing globally in frequency and intensity, introducing complex ecological interactions, yet the mechanisms by which they alter ecosystem structure remain poorly characterized due to a lack of sustained field observations.
Pengpeng Wang +4 more
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Dianci bileiqi, 2018 针对双绞线耦合雷电电磁脉冲的问题,利用试验和理论相结合的方法,建立了双绞线接收雷电电磁脉冲的试验模型,得到了双绞线耦合雷电电磁脉冲电压及频谱特征,试验结果得出:1)双绞线间接入100Ω匹配电阻的情况:双绞线的耦合电压随着冲击电流的增大而增大,可是增加线缆高度对双绞线的耦合电压并没有太大影响。2)双绞线对地接入负载电阻的情况:在相同高度下,双绞线的耦合电压与负载电阻值呈正相关关系;在电阻不变的情况下,高度越高,耦合电压值越大。3)耦合电压的频谱特性:频率主要集中在8 k Hz和2.3 ...
李祥超 +4 more
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Policy Studies Journal, Volume 54, Issue 2, May 2026.ABSTRACT Why did Australia go from the White Australia Policy, which excluded non‐whites, to institutionalizing multiculturalism policy in the 1970s? This question defies traditional political ideologies of the major political parties, which had long supported the White Australia Policy. This article is a rare empirical demonstration of the Five‐Thread
Julius C. S. Mok
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Piezocatalytic technology utilizes mechanical strain or stress‐induced piezoelectric phenomena to produce robust internal electric fields, markedly improving the separation efficiency of e−‐h+ pairs. This method has emerged as a focal point in catalysis by removing reliance on conventional light or electrical energy via its mechanical‐to ...
Yue Zhou +5 more
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Guangtongxin yanjiu, 2005 研究了熔锥型宽带耦合器的偏振相关损耗（PDL）,发现构成宽带耦合器的两熔融光纤结构上的不对称是导致其PDL不能为0的根本原因。通过对宽带耦合器结构的优化设计,报道了目前PDL最低的宽带耦合器:1310nm窗口PDL≤0.05dB;1550nm窗口PDL≤0.07dB。
苏善行, 王涛, 周卫华
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Engineering the semiconductor/dielectric interface is crucial for advancing two‐dimensional (2D) nanoelectronics, where device performance is predominantly governed by interfacial defects and dielectric coupling. Optoelectronic doping based on carrier trapping at the h‐BN/SiO2 interface has enabled non‐volatile and reversible carrier ...
Zhe Zhang +6 more
wiley +1 more source
Dianci bileiqi, 2017 为了避免二线制变送器遭受雷电浪涌的破坏,对其端口进行浪涌抗扰度试验。试验电路分为直接耦合以及阻抗耦合两种,观察变送器在组合波的不同浪涌等级冲击下的抗扰度水平。试验表明,变送器在直接耦合的状态下抗浪涌能力很低,幅值为50 V的组合波已致其损坏。而变送器在阻抗耦合的条件下,抗扰度大幅提高,10 kV的组合波对变送器也不造成损害。多种退耦电阻以及两种型号的TVS管组成的浪涌保护器在组合波冲击下,当退耦电阻阻值为2.1Ω时,TVS管的残压较小且浪涌保护器的前级泄放了大部分电流。
卢慧慧 +4 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Developing oxygen evolution reaction (OER) catalysts that combine high performance with cost‐effectiveness is a critical challenge for advancing the commercialization of anion exchange membrane water electrolysis (AEMWE). Practical application is often hindered by issues such as poor batch reproducibility and low‐cost efficiency.
Chuang Zhang +9 more
wiley +1 more source