Results 31 to 40 of about 966,152 (186)

基于PyQt5的面波频散曲线成像平台的设计与实现

open access: yesDizhen xuebao
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

Deep Learning–Driven Surface‐Enhanced Raman Scattering–Lateral Flow Immunoassay With Au Nanostars for High‐Accuracy Respiratory Virus Detection

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT The high accuracy in surface‐enhanced Raman scattering‐lateral flow immunoassays (SERS–LFIAs) is critical for reliable point‐of‐care testing (POCT) in clinical diagnostics. Conventional approaches are often affected by sampling variability and uneven distribution of immunoprobes, leading to unreliable signal fluctuations.
Shuai Zhao   +9 more
wiley   +1 more source

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

open access: yesRare 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

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研究

open access: yesGaoya dianqi, 2018
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  

The Hour that Never Comes and the Time that Remains

open access: yesJournal of Analytical Psychology, Volume 71, Issue 1, Page 123-143, February 2026.
Abstract This essay proposes a symbolic and clinical investigation of psychic temporality through two archetypal experiences of time: the hour that never comes and the time that remains. Drawing on analytical psychology, trauma theory and aesthetic philosophy, text explores how certain forms of suffering resist chronological resolution and persist as ...
Daniel Françoli Yago
wiley   +1 more source

基于小波变换与EEMD的绝缘子泄漏电流去噪方法研究

open access: yesDianci bileiqi, 2019
采用总体经验模态分解和小波阀值去噪相结合的方法对泄漏电流进行去噪处理。对泄漏电流信号首先进行总体经验模态分解,再对高频IMF分量按照4种阀值小波去噪方法(固定阀值法、启发式阈值法、自适应阈值法和极大极小阀值法)进行去噪,最后进行重构。以泄漏电流的3个特征量(有效值、3次谐波与基次谐波之比、波形)对去噪效果进行分析,综合比较得到采用总体经验模态分解与启发式阈值小波相结合的去噪方法的去噪效果最佳,采用该方法对实际污秽绝缘子泄漏电流进行去噪处理,去噪效果良好。
赵世华   +4 more
doaj  

Evolutionary and environmental determinants of heat tolerance and acclimation capacity in herpetofauna

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
Abstract Exploring heat tolerance and acclimation capacity can provide an effective approach to evaluating species’ sensitivity to extremely high temperatures due to climate warming. Despite some work on amphibian and reptile thermophysiological adaptation, related questions remain. We reviewed the literature to provide a synthesis of worldwide data on
Zijian Sun   +8 more
wiley   +1 more source

海面微波散射与风生波短波谱

open access: yes, 2000
从海面微波散射的物理机制出发,在短波平衡范围条件下,讨论了风生波短波谱形式,通过对不同波段的微波散射数据分析,建立起能适应相当宽微波波段(0.428-34.4GHz)的海面微波散射模型。文中对若干波段的微波散射系数进行了试算,并与实测资料进行了比较 ...
马丽娟, 徐丰, 贾复
core  

GIL设备超声波局放信号异常的诊断与分析

open access: yesGaoya dianqi, 2017
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  

Evolution of research on global amphibian declines

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
Abstract In the late 1980s, the scientific community became aware of severe, enigmatic amphibian population declines. These declines triggered a wave of research focused on quantifying their extent and identifying key drivers. We used text‐analysis techniques, including topic modeling and geoparsing, to examine the evolution of research focused on ...
Jordann Crawford‐Ash   +6 more
wiley   +1 more source

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