Results 21 to 30 of about 9,091 (116)

Optimizing the Electromagnetic Wave Absorption Performance of MXene@Sm(OH)3 Across the Ku Band Based on Asynchronous Permittivity Regulation

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT The central challenge in the development of high‐performance electromagnetic wave‐absorbing materials lies in achieving an optimal balance between impedance matching and attenuation characteristics. This is particularly critical for purely dielectric absorbers, where precise tailoring of the real (ε′) and imaginary (ε″) parts of the complex ...
Zhixiao Wang   +7 more
wiley   +1 more source

Boosting TiO2 Photocatalytic H2O2 Production via S, N‐Codoped Lignin‐Derived Carbon Dots: Quantifying the Enhancement Role

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Carbon dots (CDs) have emerged as promising modifiers for boosting the photocatalytic H2O2 production, yet their precise role remains to be quantitatively elucidated. Herein, S, N‐codoped lignin‐derived carbon dots (SN‐LCDs) and lignin‐derived carbon dots (LCDs) were synthesized and employed to modify TiO2.
Bin‐Peng Zhang   +6 more
wiley   +1 more source

Plant functional trait dissimilarity drives plant mixture effects on fine root biomass and trait variations

open access: yesNew Phytologist, Volume 249, Issue 2, Page 764-776, January 2026.
Summary Fine roots are critical for soil resource uptake, yet how declining plant diversity alters fine root biomass (RB) and traits remains unclear. We tested how plant functional trait dissimilarity in shade tolerance, drought tolerance, growth rate, and nitrogen‐fixation ability drives variation in root attributes.
Sai Peng, Yakun Zhang, Han Y. H. Chen
wiley   +1 more source

Factors influencing fine roots decomposition rates in response to nitrogen addition vary across root characteristics

open access: yesFunctional Ecology, Volume 39, Issue 12, Page 3504-3516, December 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Nitrogen (N) deposition strongly affects litter decomposition and nutrient release, thereby reshaping carbon cycling in terrestrial ecosystems. Although most studies have focused on above‐ground litter, the effects of N addition on fine root decomposition and their ...
Yuneng Wang   +5 more
wiley   +1 more source

掺杂Y2O3对ZnO-Bi2O3系压敏电阻片性能的影响

open access: yesDianci bileiqi, 2007
掺杂Y2O3可显著提高ZnO-Bi2O3系压敏电阻的电位梯度、能量吸收能力等电气性能,但会引起泄漏电流的增加。研究了不同烧成温度下,掺杂0~1.7%(摩尔分数)Y2O3对ZnO-Bi2O3压敏电阻片电气性能的影响。结果表明,在1140℃下,掺杂0.68%(摩尔分数)Y2O3,可获得具有300V/mm的电位梯度和370J/cm3能量吸收能力的高性能电阻片。此外,以FSM为主成分的“F”无机高阻层适宜于高梯度压敏电阻片的侧面绝缘,加速老化系数KCT小于1。
王玉平, 马军
doaj  

超级电容储能和卸荷电路协调控制的永磁同步风电机组低电压穿越策略

open access: yesGaoya dianqi, 2023
针对永磁同步风力发电机组的低电压穿越问题,结合超级电容储能与卸荷电路的优点,提出了一种超级电容储能和卸荷电路协调控制的低电压穿越策略。当低电压故障发生时,在机组变流器的直流侧同时投入卸荷电阻和超级电容储能系统共同吸收故障期间的不平衡功率。在故障清除后,超级电容储能系统根据网侧变流器的运行状态将故障期间吸收的能量回馈电网。仿真结果表明,所提协调控制策略能在保证机组可靠实现故障穿越的同时,降低超级电容的设计容量和成本,并提高风能的利用率。
王雨欣   +6 more
doaj  

Altered nutrient cycling functionality in seagrass meadows under a simulated future marine heatwave event

open access: yesNew Phytologist, Volume 247, Issue 6, Page 2616-2629, September 2025.
Summary Seagrasses are important contributors to environmental nutrient cycling in marine ecosystems and can improve water quality by absorbing excess nitrogen (N). However, these ecosystems are vulnerable to human‐mediated pressures, including marine heatwaves (MHWs), particularly those of longer duration. We performed an experiment simulating a 30‐d,
Alissa V. Bass   +5 more
wiley   +1 more source

高压直流电路的开断及其能量吸收装置用的氧化锌阀片

open access: yesGaoya dianqi, 1991
本文对直流电路的开断过程及系统能量吸收问题进行了分析,并对用于直流断路器吸能装置的ZnO阀片的通流能力进行了初步的试验考核。
吉嘉琴, 张节容, 张力超
doaj  

Arbuscular mycorrhizal fungus reshapes the rhizosphere microbiome of alfalfa in response to above‐ground attack by aphids and a fungal plant pathogen

open access: yesFunctional Ecology, Volume 39, Issue 8, Page 2149-2169, August 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Plants assemble beneficial rhizosphere microbiomes through a ‘cry for help’ mechanism upon pathogen or insect herbivore attack. The arbuscular mycorrhizal fungi (AMF) can influence the composition of microbial communities in the plant rhizosphere. However, their impacts
Yingde Li   +6 more
wiley   +1 more source

10kV合成套无间隙氧化锌避雷器热特性的研究 附视频

open access: yesDianci bileiqi, 1996
介绍了对10kV合成套无间隙氧化锌避雷器重复吸收较大能量的耐受能力方面的试验研究结果。实测所得这雷器的泄漏电流随着重复吸收能量的大小和次数而变化的数据结果及变化原因的剖析,对估计无间隙氧化锌避雷器用于限制电弧接地过电压的可能性,有重要的参考价值。
高玉明, 杨立波
doaj  

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