Results 31 to 40 of about 13,996 (117)
Automating the analysis of public saliency and attitudes toward biodiversity from digital media
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract Measuring public attitudes toward wildlife provides crucial insights into human relationships with nature and helps monitor progress toward Global Biodiversity Framework targets. Yet, conducting such assessments at a global scale presents challenges.
Noah Giebink +8 more
wiley +1 more source
European Policy Analysis, Volume 12, Issue 2, Spring 2026.ABSTRACT This paper explores the integration of gender mainstreaming in urban food policies (UFPs) through three Spanish case studies: Barcelona, Valencia, and Zaragoza. While UFPs are pivotal for addressing sustainability in urban food systems, attention to gender disparities within them remains insufficient.
Chiara Bergonzini, Francesca Donati
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Aqueous zinc‐ion batteries (AZIBs) hold great promise for safe and sustainable energy storage, but their commercialization is impeded by severe Zn dendrite growth and interfacial instability. To address these challenges, we propose a defect engineering strategy employing ultrafine ZnAl2O4 (ZAO) nanoparticles (∼5 nm) with oxygen vacancy defects
Yilun Ren +9 more
wiley +1 more source
Gaoya dianqi, 2018 为了更好地研究直流电压下油纸绝缘系统针板电极局部放电的电荷分布特性,文中基于流体动力学扩散—漂移方程和双极电荷传输方程搭建仿真模型用以模拟空间电荷的分布,研究了电荷产生的和流注发展的过程与放电特性,得到了局部放电过程中电荷,电场和电势的发展趋势。研究表明:油纸绝缘针板电极的局放过程分为流注击穿油隙与电荷在纸板上积累两个阶段,油隙的击穿过程中,流注头部的电场强度与净电荷密度会不断增加,形成自持放电;当流注到达绝缘纸板表面并在纸面积累电荷,将形成屏蔽层,导致流注的电场分布与电荷分布减弱,逐渐形成零电场区域 ...
姚竣严 +4 more
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Zhejiang Daxue xuebao. Lixue ban, 2002 介绍了大庆油田应用胶态分散凝胶深度调剖技术的凝胶成胶机理、影响成胶的因素、凝胶在多孔介质中的渗流特征及现场试验效果.室内岩芯模拟研究及现场典型井试验表明,流动凝胶在多孔介质中可流动,在单井注入15000～20000 m3流动凝胶体系过程中,注入压力逐渐升高,可以实现深度调剖,更好地提高聚合物驱采收率.
XIEChao-yang(谢朝阳) +5 more
doaj +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The Schottky barrier height (SBH), which serves as a pivotal determinant of charge carrier injection efficiency in electronic devices, critically governs electrical behavior at metal/semiconductor interfaces. However, pronounced metal‐induced gap states at metal contact interfaces induce Fermi‐level pinning, which constrains the ...
Xiaofei Liu +10 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 1982 体外循环应用于心内直视手术已有20多年的历史。但目前通用的体外循环机是以恒流血液注入动脉,不符合正常的循环生理。因此,要提高心脏手术的水平,需寻找一种更接近生理的灌注技术。根据人类心脏产生的血流灌注是一种搏动性灌注的原理,我们把我院研制的助搏器应用于体外循环手术,目的是使血流变为搏动性 ...
林志华
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Zhongshan Daxue xuebao. Yixue kexue ban, 2006 【目的】探讨体外循环中低流量肺动脉灌注对肺功能影响的作用机理。【方法】体质量18-22kg的杂种犬10只，随机分为对照组（n=5）和肺灌注组（n=5）。常规建立体外循环。肺灌注组用氧合血30mL／（kg·min）灌注肺动脉。分别于转流前，停体外循环即刻，转流后1h，转流后2h采集数据，计算氧合指数、肺动态顺应性。检测肺静脉血丙二醛（MDA）、超氧化物歧化酶（SOD）、细胞间黏附分子1（ICAM-1）和P选择素。【结果】转流后肺灌注组犬的肺动态顺应性和氧合指数明显高于对照组（P〈0．05 ...
周成斌 +5 more
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Shiyou jixie, 2014 针对长庆低渗透油藏精细分层注水特点，常规分注技术存在实时监控难以及测调过程复杂等问题，提出了数字式分层注水技术。该技术应用配水器集成孔板流量计、一体化可调水嘴、电机、验封短节、井下电源、通信模块及控制芯片等部件，实现了配水器的自动验封、自动调节、数据实时录取与存储和无线通信的功能，极大地提高了注水过程的自动化水平。通过分析油管的沿程流阻、水嘴和流量计的阻力损失，建立了数字式分层注水井注水的流动特性分析力学模型。利用该模型可以计算得出井下各层的注水压力及水嘴开度关系，进而优化注水参数，提高分层注水效果。
杨玲智 +3 more
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Gaoya dianqi强电场作用下变压器油中流注会在特定阈值电压处获得阶跃式发展，并诱发变压器实际运行中大间距油隙的绝缘失效。然而目前常用的“4类模式”分类方法仅能够反映流注放电发生突变时平均发展速度的改变程度，无法对具有不同理化特性的变压器油中流注突变规律与机理做出有效区分。文中以变压器中常见的气制石蜡基油和天然酯为研究对象，在标准雷电冲击电压下对25 mm针—板电极结构中的流注放电形态和伴生光电信号进行了测量。在考虑流注放电平均发展速度这一传统参数的基础上，引入放电分形维数和光电信号幅值两类特征分量 ...
彭志燕 +4 more
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