Results 41 to 50 of about 14,445 (117)
Dianci bileiqi, 2018 在热力学模型基础上,考虑了空间电荷屏蔽作用的二次电晕起始过程,认为流注茎（电晕区与流注-先导转化区）温度达到1 500 K同时二次电晕起始即新生迎面先导起始。并且根据纹影仪对先导通道根部的观测结果,流注茎假设为类圆锥状。通过Comsol软件对地面高大建筑物尖端处上行正极性先导的始发过程进行了数值模拟研究,并分析了锥形流注茎和二次电晕起始过程对先导始发过程的影响。最终得到了锥形流注茎长度与流注茎半径的关系,证明了随着电流的注入,根部优先转化为先导;计算的建筑物尖端处在最大半径（R=0.24 mm ...
王梦寒
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Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Achieving global conservation policy goals requires the ability to set and measure progress toward science‐based targets for biodiversity. The species threat abatement and restoration (STAR) metric was developed to enable actors to set science‐based targets for species.
Louise Mair +17 more
wiley +1 more source
A more‐than‐human political ecology of Indonesian songbird trade
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Since its inception, conservation science has considered wildlife trade a problem. In focusing on conservation outcomes, conservationists almost completely ignore the welfare of traded animals and plants and the harms they endure. We developed a political ecology approach that incorporates the interconnectedness of people with animals and ...
Sicily Fiennes +9 more
wiley +1 more source
Huli yanjiu, 1997 通过对５０个一次性引流袋实际注水量与引流袋标量刻度的对照观察，发现一次性引流袋标量与实际注水量有差异。当注入３００ｍｌ以下水量时，引流袋内标量多数大于实际量，而注入３００ｍｌ以上水量时，引流袋标量明显少于实际量。提示：临床护士对于要求准确记录出入量的患者，测量引流量时一定要用量杯测量，以避免误差。
徐金美 +3 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT The rapid expansion of data‐intensive applications has highlighted the fundamental limitations of traditional CMOS‐based von Neumann architectures, particularly in terms of power efficiency, latency, and flexibility. Spin logic devices utilizing spin–orbit torque (SOT) present a promising pathway for nonvolatile, low‐power, and in‐memory ...
Ke‐Yi Wu +5 more
wiley +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Lithium‐selenium (Li‐Se) batteries have attracted considerable attention due to their high theoretical specific capacity and the intrinsically good electronic conductivity of selenium. Nevertheless, low active‐material utilization, parasitic side reactions, and sluggish reaction kinetics hinder their practical application.
Yanan Fu +8 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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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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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
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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