Results 21 to 30 of about 1,227,893 (152)

The Role of Technology Standards in Strategic Hedging

open access: yesAsian Politics &Policy, Volume 18, Issue 2, April 2026.
ABSTRACT This article argues that technology standards provide Southeast Asian states with a distinct mechanism for hedging amid intensifying US–China technological rivalry. Traditional hedging strategies emphasizing economic engagement without political alignment are increasingly constrained by the weaponization of technological interdependence ...
Darren J. Lim, Anthea Roberts
wiley   +1 more source

弹性系统振动干扰脉冲风洞测力的理论研究

open access: yes, 2013
气动力测量技术是激波风洞关键技术之一。风洞起动过程气动力冲击引起测力系统的振动,真实气动力信号受到振动信号的干扰。本文将测力系统简化为等截面悬臂梁,应用振动理论方法,通过对其自由、强迫振动特性分析得到气动力干扰量的分布规律。自由振动对单个振型气动力干扰量分布规律进行了研究,分析得到并非所有振型对气动力有干扰。进一步得到加速度惯性补偿可能存在该补偿的振型无法补偿、不需补偿的振型却进行了补偿的问题。强迫振动对振型之间气动力干扰量分布规律进行了研究,分析表明其与截面位置、载荷作用位置、载荷类型有关 ...
姜宗林, 孟宝清, 韩桂来
core   +1 more source

Two decades of changes in the global network of illegal wildlife trade

open access: yesConservation Biology, Volume 40, Issue 2, April 2026.
Abstract Understanding how illegal wildlife trade (IWT) has changed over time is fundamental for biodiversity conservation; however, knowledge of the network remains limited. We used TRAFFIC's IWT dataset, legal trade data from the CITES legal wildlife trade database as a benchmark, and network analysis to identify changes in IWT from 2000 to 2022. The
J. H. Tow   +5 more
wiley   +1 more source

Sun Bear Ecology and Conservation: Multiscale Habitat Associations in Southeast Asia 马来熊的生态与保护:东南亚地区的多尺度生境关联研究

open access: yesIntegrative Conservation, Volume 5, Issue 1, Page 125-136, March 2026.
We collated detections of the sun bear from new and previously published camera trap studies across its range. We then analysed these detections at two different spatial scales to assess the habitat associations and diel activity of this species. We found that the sun bear is tolerant to moderate habitat disturbances. ABSTRACT Degraded tropical forests,
Alexander Hendry   +5 more
wiley   +1 more source

超声速三维进气道内激波干扰的研究

open access: yes, 2017
为了为三维进气道的设计提供有用的分析数据,对高超声速和超声速来流下三维进气道内激波干扰进行了理论和数值研究。进气道模型选取"箱式"以及三面侧压进气道作为研究对象。理论分析采用了"空间降维"方法,即将进气道各个角落处的三维双楔定常激波干扰问题转换为二维非定常激波干扰问题,并利用激波动力学对其进行求解。数值验证方法利用2阶NND差分格式求解三维无粘欧拉方程,网格数量为1200多万,并采用MPI并行进行计算。该理论分析方法很好地对进气道各个角落处的激波干扰波系结构进行了判别 ...
汪运鹏, 姜宗林, 王春, 项高翔
core   +1 more source

Progress in Surface‐Enhanced Raman Scattering‐Based Volatile Organic Compounds Detection: Materials, Application, and Prospects

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT The detection of volatile organic compounds (VOCs) holds significant implications in environmental monitoring and disease diagnosis. Traditional gas detection technologies are constrained by complex operation and high cost, thereby failing to satisfy real‐time detection demands.
Yuening Wang   +11 more
wiley   +1 more source

基于阻容网络的避雷器三相耦合干扰电流向量补偿法

open access: yesDianci bileiqi, 2020
随着我国电力事业的发展,电压等级不断提高,避雷器结构更复杂,相间与相邻带电设备的耦合电容干扰也变得难以分析计算。采用补偿法的LCD-4型泄漏电流检测仪及其带移相器的改进型号在现场的应用有一定局限性。为分析计算高压避雷器的耦合电容干扰,准确诊断各种结构和配置形式下的避雷器状态,提出一种避雷器三相耦合电容电流向量补偿方案。基于阻容网络理论,采用场路仿真结合方法,清晰地分析计算避雷器三相的耦合干扰,并提取对应避雷器各相的耦合干扰向量。通过预设故障仿真,证明避雷器三相泄漏电流监测数据经过耦合干扰向量补偿后 ...
王建   +5 more
doaj  

Factors That Influenced Coping With COVID‐19 During the Pandemic in Botswana

open access: yesWorld Medical &Health Policy, Volume 18, Issue 1, March 2026.
ABSTRACT This paper forms part of the broader Global South study, Personal and Family Coping with COVID‐19 in the Global South, which examines psychosocial and behavioral responses to the COVID‐19 pandemic. In Sub‐Saharan Africa, the pandemic posed significant psychological, social, and economic challenges, with important implications for preparedness ...
Magen Mhaka‐Mutepfa   +3 more
wiley   +1 more source

变电站二次设备电磁干扰的等效电路模型分析

open access: yesGaoya dianqi, 2011
基于传输线理论,介绍了一种电磁耦合等效电路模型,可用来分析外界电磁场照射下,有导线贯通的金属机箱其内部电路上的耦合干扰电压。分析了不同长度的贯通导线和不同强度的干扰电场对受害导线的影响。结果表明:穿出屏蔽机箱的导线越长,机箱内受害导线的干扰电压越大,并且在谐振频率处干扰电压产生峰值;受害导线的干扰电压随着干扰电磁场频率和强度的增大而增大。
郑春旭   +4 more
doaj  

Carbon Material Films for Flexible and Efficient Electromagnetic Interference Shielding: A Review

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT With the rapid development of technology such as the Internet and electronic devices, electromagnetic radiation pollution has become an increasingly prominent issue, which negatively impacts both human health and the normal operation of equipment.
Yu‐Xin Chen   +10 more
wiley   +1 more source

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