Results 31 to 40 of about 8,021 (169)
Effect of Different Methods of Analgesia on Analgesic after Total Knee Arthroplasty [PDF]
, 2016 目的比较不同镇痛方法（局部镇痛、硬膜外镇痛、静脉镇痛、髂筋膜间隙阻滞复合静脉镇痛）对全膝关节置换术（TKA）术后镇痛的效果影响。 方法择期单侧TKA患者80例，随机分为四组：局部镇痛组（L组）、静脉镇痛组（I组）、硬膜外镇痛组（E组）、髂筋膜间隙阻滞复合静脉镇痛组（F＋I组），术中均采用腰硬联合麻醉。记录术前、术毕1、8、24、48h静息VAS评分和术前、术毕8、24、48h运动VAS评分；记录患者术后其它镇痛药物（凯酚、丁丙诺菲皮贴）的额外使用次数；记录术前、术后8、24h的IL-6和皮质醇水平 ...
郑星星
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Atomic‐scale understanding of interstitial‐strengthened high‐entropy alloys
Rare Metals, Volume 44, Issue 9, Page 6002-6014, September 2025.Graphic abstract Abstract Interstitial alloying has emerged as a powerful strategy to tune microstructure and microproperties of high‐entropy alloys (HEAs) due to the strong interaction of interstitials with constituent elements and crystal defects, which enables the development of advanced alloys with superior mechanical and functional properties. The
Qiang Yu, Shi Qiu, Zeng‐Bao Jiao
wiley +1 more source
Gaoya dianqi, 2021 文中将两个球—球气隙串联,模拟双断口断路器模型,串联的两个气隙承受标准雷电冲击电压（1.2/50μs）,空气间隙击穿照片由相机拍摄。实验结果中的击穿现象可分为3种类型,将只有上球隙或下球隙被击穿定义为击穿类型Ⅰ;串联双球隙的非同期击穿定义为击穿类型Ⅱ;串联双球隙的同期击穿定义为击穿类型Ⅲ。进一步研究发现,3种击穿类型的成因与上下间隙的电场强度分布有关,上间隙最大场强与下间隙最大场强之比在6.9～1.52和0.8～0.2之间表现为击穿类型Ⅰ和击穿类型Ⅱ,在1.5～1.52和0.7～0 ...
李秀广 +7 more
doaj
A Preliminary Study of Probe preparation for Localized Surface Plasmon Resonance Scanning Microscope [PDF]
, 2015 田中群院士提出了一种纳米间隙耦合增强局域表面等离激元共振（LSPR）扫描显微技术，其核心是利用修饰在探针上的贵金属纳米粒子与贵金属纳米膜耦合体系LSPR性质的距离敏感性，发展一种精确定位的方法；同时利用耦合体系LSPR性质的环境敏感性，为纳米尺度范围的表界面，如电化学体系中的双电层界面的研究提供一种全新的研究平台。 本文主要对纳米间隙耦合增强LSPR显微镜探针的制备做了初步的探索：合成高介电敏感性的纳米粒子；选择合适的光纤将其拉锥，并进行遮光处理；在光纤末端修饰高介电敏感性的纳米粒子制备成光纤探针 ...
何茜
core
Ultrasound in Obstetrics &Gynecology, Volume 65, Issue 6, Page 749-760, June 2025.ABSTRACT Objective Placental dysfunction can result in small‐for‐gestational age (SGA) or fetal growth restriction (FGR). The aim of this prospective cohort study was to assess the association of the cerebroplacental ratio (CPR) and other more conventional fetoplacental Doppler indices, circulating placental growth factor (PlGF) levels and soluble fms ...
J. Hong +6 more
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Gaoya dianqi, 2012 绝缘子并联间隙属于新的疏导型防雷措施,能够有效的保护绝缘子串,提高重合闸的成功率。目前,国内对并联间隙的研究主要集中在电弧的运动特性和间隙电极的形状之上,忽略了对并联间隙自身特性的研究,以及并联间隙上的电弧和绝缘子之间的关系等问题。笔者通过大量的试验研究并联间隙对绝缘子的保护特性,认为要想发挥并联间隙良好的保护特性,并联间隙两个电极之间的距离应该不大于绝缘子串结构高度的90%,而且应该和绝缘子之间有足够的距离。
顾铁利 +5 more
doaj
Comparasion study on the effects of mangrove wetland sediments on the sequestration of typical sulfonamides from the estuarine water [PDF]
, 2015 作为陆地污染物进入海洋的屏障，红树林已然成为众多典型污染物汇聚的场所之一。近年来，海产养殖业的大肆兴起更是加重了抗生素在红树林区的直接污染。锁定态是控制土壤抗生素归宿的主要因素，具有环境存在时间长，危害大等特点，可通过再释放重回到环境中，对环境造成长期危害。对典型磺胺类在红树林群落沉积物中锁定能力的研究对于探索抗生素在红树林区的环境行为和红树林湿地抗生素污染控制及修复功能评估具有现实意义。本文选取了12种水产、禽畜及人用较为频繁的典型磺胺类药物，分别为磺胺甲噻二唑(sulfamethizole,SMT)、
张宇
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Wildlife Letters, Volume 2, Issue 4, Page 192-203, December 2024.Knowledge of the reproductive success of organisms in urban habitat fragments is needed to conserve biodiversity in our urbanizing world. We found that differences in nest success among birds in urban forest patches is explained by factors on three distinct spatial scales even across a limited urban development gradient.
Ohad J. Paris, Colin E. Studds
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, 1997 休眠卵是轮虫在恶劣生态条件下形成的滞育结构。本研究用光学显微镜和扫描电子显微镜对东湖14种轮虫休眠卵形态进行了观察，其中关于尾突臂尾轮虫（Brachionuscaudatus，Barrois＆Daday）、方形臂尾轮虫（Bquadridentatus，hermann）、中型晶囊轮虫（Asplanchnaintermedia，Hudson）、顶生三肢轮虫（Filiniaterminalis，Plate）的休眠卵的形态特征尚未见过报道。这些休眠卵一般卵壳较厚，颜色较深，壳表面有纹饰。不同种轮虫的休眠卵形态、
林里,周洁,黄祥飞
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IET Collaborative Intelligent Manufacturing, Volume 6, Issue 4, December 2024.Domain‐adaptation‐based named entity recognition with information enrichment is proposed for developing an equipment fault knowledge graph. A question answering application of the equipment fault knowledge graph is proposed. Abstract Numerous files, such as records and logs, are generated in the process of equipment diagnosis and maintenance (D&M ...
Dengrui Xiong +3 more
wiley +1 more source