Results 31 to 40 of about 12,197 (133)
ABSTRACT Integrating light emission and electromagnetic wave (EMW) absorption into a single material opens up possibilities for multienvironmental applications. Herein, we propose a novel “molecular engineering‐pyrolysis conversion” strategy to construct a bifunctional system with tunable photoluminescence and efficient EMW absorption performance.
Renjie Wang +7 more
wiley +1 more source
文章提出一种将光相移键控(PSK)调制用于基于谐波生成原理的毫米波光纤无线电(ROF)下行链路系统,在生成毫米波的同时,实现了二进制相移键控(BPSK)调制,并且通过加入并行光载波抑制双边带调制(DSB-SC)支路实现了导频的产生,供毫米波下变频之用。仿真结果验证了毫米波的产生和信号的调制解调过程,证明了该下行链路系统的可行性。
朱美伟 +3 more
doaj
Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters
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
wiley +1 more source
母线采用第二类接线方式,考虑母线分布电容,建立输电线路模型。对行波线模分量进行小波变换以及模极大值处理,利用模式识别,建立隶属度函数,对故障初始行波、故障点反射波、对端母线反射波进行标定,得到1组时刻组合(t1m,t2m,t3m)。经过单端行波测距计算,获得2个测距结果x和(L-x),其中1个测距结果为伪根,给出去除该伪根的方法。理论分析和EMTP仿真验证,该文测距方法不受波速影响,并且具有很高的测距精度,较好的抗干扰性和抗过渡电阻能力。
胥杰 +5 more
doaj
Overreliance on Orthographic Similarity in L2‐Japanese Conceptual Processing by L1‐Chinese Learners
ABSTRACT Orthographic and phonological similarities between first (L1) and second (L2) languages can facilitate L2 processing. Particularly, L1‐Chinese learners of L2‐Japanese can benefit from the shared morphosyllabic Chinese characters (Japanese kanji/Chinese hanzi) because of their similar orthographies.
Xuehan Zhao, Kexin Xiong, Sachiko Kiyama
wiley +1 more source
ABSTRACT MXenes have been widely investigated as microwave absorption (MA) materials because of their unique properties. This study introduces a terminal bond manipulation strategy to enhance charge transfer and polarization in Ti3C2Tx, optimizing its MA performance.
Xiang Fang +8 more
wiley +1 more source
为了研究特高压直流输电中直流偏磁引起的谐波对换相失败的影响,利用谐波换相电压时间面积的分析方法,分析直流偏磁引起的谐波与换相失败的关系。首先,在PSCAD/EMTDC中搭建了±800 kV特高压直流输电模型,并对双极平衡的运行工况以及单极—大地运行工况下,发生故障时,谐波、励磁电流、熄弧角以及阀电流的情况进行仿真。其次,对仿真结果进行分析,发生直流偏磁引起的谐波对换相失败有一定影响。最后,利用谐波的换相时间面积进行定量的计算。结果表明,直流偏磁引起的谐波会增大换相失败的风险。
常鹏 +5 more
doaj
面波频散成像在研究地下介质波速结构方面起着重要作用,然而目前公开的面波频散成像工具大多在命令行环境下运行,使用不同种编程语言对数据进行前后处理,对于普通用户而言:① 运行环境的配置难度系数高;② 需要较强的编程能力进行数据加工以及结果展示。为解决上述问题,本文基于PyQt5开发了一款易于部署在Windows 11操作系统上的面波频散曲线成像平台(SWDIT)。SWDIT已集成多种模块,包括半波长法模块、三维面波走时反演模块、三维数据可视化模块,可对用户输入的频散曲线信息进行灵活成像 ...
Jing Hu +4 more
doaj +1 more source
ABSTRACT The development of novel oxygen electrocatalysts with cost‐effectiveness, scalability, high catalytic activity, and stability presents a significant challenge for zinc–air batteries (ZABs). The nitrogen‐rich lignin coordination network structure is synthesized through amine modification of lignin.
Ping‐Xian Feng +8 more
wiley +1 more source
运行中局部放电测试是检测GIL设备内部是否存在缺陷的最有效手段之一。文中对GIL设备运行中超声波局部放电测试发现的异常进行了分析。依据超声波局放测试、超声波/地电波/高频电流声电联合诊断测试、现场解体检查及返厂解体检查结果进行了综合分析判断,确定了局放异常产生的原因并提出运行建议。
黄和燕 +5 more
doaj

