Results 11 to 20 of about 7,373 (127)

MXene‐Based Electromagnetic Attenuation Materials in Microwave and Terahertz Bands

Rare Metals, EarlyView.
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, Sitong Li, Libo Chang, Zelin Zhao, Tianze Zhang, Si Chen, Xuehang Wang, Zhe Wu, Tianpeng Ding, Xu Xiao   +9 more
wiley   +1 more source

Composite‐Field Annealing Enables Superior High‐Temperature Noise Stability in Fluxgate Sensors With Co‐Rich Amorphous Microwires

Rare Metals, EarlyView.
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, Zhen Cui, Lizi Pan, Xingjie Jia, Mengran Su, Chunyang Mu, Aina He, Yaqiang Dong, Qikui Man, Baogen Shen, Jiawei Li   +10 more
wiley   +1 more source

Development of Ba(Zn1/3Nb2/3)O3 and ZnNb2O6 Microwave Dielectric Ceramics for Wireless Technologies [PDF]

, 2005
摘要微波介质陶瓷是在微波频段（300MHz～3000GHz）使用的电子陶瓷，它主要应用于微波谐振器和滤波器。要求具有较高的电容率εr，高品质因子Q和可调节的谐振频率温度系数τf。本论文采用传统的固相法合成了Ba(Zn1/3Nb2/3)O3和ZnNb2O6陶瓷，研究了工艺因素、不同晶位取代对材料结构与介电性能的影响，并对介电极化和损耗机理进行了初步的探讨。本论文第三章优化Ba(Zn1/3Nb2/3)O3陶瓷的预烧、烧结条件，得到最佳工艺条件：预烧条件1200℃×4h和烧结条件1400℃×4h，其介电性能为：
罗军
core  

Bifunctional Competitive Structure of Biomass Carbon‐Derived Metacomposites for Tunable ε′‐Near‐Zero and ε′‐Negative Responses

Rare Metals, EarlyView.
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, Yunpeng Qu, Qixuan Zeng, Xiaosi Qi, Yao Liu   +4 more
wiley   +1 more source

Distribution, scale, and drivers of mass mortality events in Europe's freshwater bivalves

Conservation Biology, EarlyView.
Abstract Mass mortality events (MMEs) are decimating populations and compromising key ecosystem functions around the globe. One taxon particularly vulnerable to MMEs is freshwater bivalve mollusks. This group has important ecosystem engineering capacities and includes highly threatened and highly invasive taxa.
Daniel A. Cossey, Maria Urbańska, Ronaldo Sousa, Juergen Geist, Anna Maria Labecka, Şebnem Atasaral, Maciej Bonk, Liliya Bylyna, Frank P. L. Collas, Daniel Daill, Andreas H. Dobler, Noé Ferreira‐Rodríguez, Dariusz Halabowski, Martina I. Ilarri, Jasna Lajtner, Jon H. Mageroy, Evelyn A. Moorkens, Javier Morales, William H. Morgan, Grégory Motte, Keiko Nakamura, Paz Ondina, Martin Österling, Małgorzata Ożgo, Momir Paunović, Vincent Prié, Maja Raković, Larysa Shevchuk, Spase Shumka, Mikhail O. Son, Jouni Taskinen, Frankie Thielen, Henn Timm, Jelena Tomović, Dariusz Ulikowski, Gorazd Urbanič, Simone Varandas, Agnieszka Izolda Wasilewska, Niklas Wengström, David C. Aldridge   +39 more
wiley   +1 more source

Profiling EFL Students’ Motivation and Anxiety in Collaborative Learning: Associations With Teachers’ Support, Self‐Regulated Learning, and Achievement

International Journal of Applied Linguistics, EarlyView.
ABSTRACT Previous research has established the relationships between motivation, anxiety, teachers’ support, and self‐regulated learning (SRL) in English‐as‐a‐foreign‐language (EFL) learning. Most of the studies, however, have taken a variable‐centered approach in addressing the variable correlations, while learners’ characteristics and variable links ...
Yuhong Jiao, Barry Bai, Jing Li
wiley   +1 more source

Genomic responses to increased temperature and pollinator selection in Brassica rapa L.

New Phytologist, EarlyView.
Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
wiley   +1 more source

Emotional and attitudinal responses to social media depictions of human–wildlife interactions at wildlife tourist attractions

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

GIS局部放电特高频检测灵敏度的检验方案细化研究

Gaoya dianqi, 2014
为了检验局部放电特高频检测装置的灵敏度,笔者对目前广泛应用的CIGRE方案进行了实验研究。通过对脉冲源发射的特高频信号时域和频域特征分析,检验了脉冲源与实际放电源的等效性。试验发现脉冲源激发的特高频信号峰峰值随输出电压升高呈线性增长,与悬浮金属体作为放电标准源激发的特高频信号峰峰值与放电量的关系曲线类似。笔者结合对GIS中局部放电激发和传播特性的研究,提出了细化CIGRE关于特高频检测系统灵敏度检验草案的建议。
丁登伟, 高文胜, 刘卫东
doaj  

Template Engineering of Magnetic Nanoparticles Decorated on Porous Carbon for High‐Performance Multiband Electromagnetic Wave Absorption

Rare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Although magnetic carbon materials possess significant potential in the field of electromagnetic wave absorption (EWA) due to the synergistic effect of multiple attenuation mechanisms, the currently reported magnetic carbon EWA materials face some challenges, such as high cost, low yield, and easy agglomeration of the magnetic component ...
Bo Jiang, Chen Zhang, Wang Yang, Shao‐Xiong Du, Shuang Liu, Jun‐Yan Dong, Bo Long, Pan Yan, Rui Mao, Yong‐Feng Li   +9 more
wiley   +1 more source