Results 81 to 90 of about 46,361 (266)
Gaoya dianqi, 1959 目前电器工业中有逐漸以生产兩柱式戶外隔离开关来代替三柱式戶外隔离开关的趋势,西欧国家已紛纷生产南柱式隔离开关;捷克、波蘭等东欧人民民主国家也已生产兩柱式的隔离开关,苏联近年也正在逐步以兩柱式代替三柱式的,我国电力部門对这种新型的隔离开关也非常注意。本文就个人所見对兩柱式和三柱式隔离开关以及V型隔离开关作一分析此較。
章福民
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中西医结合护理Objective To investigate the effect of standardized acupoint massage on abdominal distension in patients after lumbar spine surgery. Methods A total of 56 patients who received lumbar spine surgery were divided into control group and observation group ...
WEI Xiuduo (魏修朵) +1 more
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New Phytologist, Volume 249, Issue 5, Page 2355-2371, March 2026.Summary Following changes in light flux, photosynthesis (A) typically adjusts more quickly than stomatal conductance (gs), which is dependent on changes in stomatal aperture. Faster stomatal responses are proposed to reduce water loss and enhance growth in dynamic light environments. Stomatal opening and closing parameters were determined in a range of
Robert A. Brench +4 more
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New Phytologist, Volume 249, Issue 5, Page 2547-2558, March 2026.Summary Estimating fungal geographic ranges and niche potential is limited by the ephemeral nature of fruiting bodies. While environmental DNA offers broader insights, species‐level identification remains difficult due to uncertain sequence clustering thresholds, low interspecific variation in barcoding regions, and limited taxonomic resolution.
Chance R. Noffsinger +7 more
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Jianzhu Gangjiegou Jinzhan为了研究大高宽比矩形钢管混凝土柱的压弯性能，对大高宽比钢管混凝土短柱进行偏压试验并结合有限元模拟补充了4组试件进行对比，包括不同偏心率、高宽比、钢管壁厚度、截面尺寸情况下柱性能的对比分析。最后参考常用的4本国内外规范进行柱承载力计算，对比并判断现有规范是否适用。结果表明：试件破坏模式均为长边鼓曲，当荷载小于极限承载力的80%时，横截面高度上的应变分布服从平截面假定；随着偏心率增大，柱延性提升，在偏心率超过0.205后，柱延性开始下降；随着壁厚增加，柱延性提升，在壁厚达到8 mm后，柱延性开始下降 ...
陈安英 +4 more
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Shiyou jixie, 2014 为了研究深斜井注水管柱的受力情况，在前人研究的基础上建立了适合于深斜井注水管柱下放的力学模型，综合考虑管柱自重、摩阻力及液压力的作用，计算了直径段、弯曲段和稳斜段管柱的摩阻力和轴向力，同时计算了各井段井口的大钩载荷；提出了管柱顺利下放的判定依据，分析了管柱下放的影响因素，并结合实例验证了计算方法的正确性。分析结果表明，弯曲段下放的管柱摩阻力随着井斜角和摩擦因数的增大而增大，管柱下放到稳斜段时摩阻力随着摩擦因数、井斜角、管柱规格的增大而增大；弯曲段管柱的钩载与下放深度呈非线性关系 ...
张宏伟 +6 more
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Revisiting the relationship between stomatal size and speed across species – a meta‐analysis
New Phytologist, Volume 249, Issue 5, Page 2338-2354, March 2026.Summary The rate of stomatal opening and closure in response to changes in light affects leaf photosynthesis and water use. However, it is unclear how strongly stomatal size (SS) and density (SD) influence stomatal conductance (gs) kinetics, and whether variation arises from methodological differences, guard cell type or degree of amphistomaty.
Nik Woning +31 more
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Dianci bileiqi, 2019 高压支柱瓷绝缘子是发电厂和变电站常用电气设备之一,其质量直接影响着电网安全运行。支柱瓷绝缘子主要对刀闸支柱和硬管母线起机械支撑和绝缘作用,弯曲破坏负荷和扭转破坏负荷是支柱绝缘子重要的性能指标。以35 k V支柱瓷绝缘子为样品,对绝缘子样品进行弯曲破坏验、扭转破坏试验和冻融循环试验以及瓷柱的微观结构分析。试验结果表明:支柱瓷绝缘子扭转破坏负荷和弯曲破坏负荷试验后,发生断裂的瓷柱断面位置和形状有明显的不同;冻融循环试验后支柱瓷绝缘子的扭转破坏负荷未见明显变化,而弯曲破坏负荷明显降低;通过XRD图谱发现 ...
高博 +5 more
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Transcriptomic prey‐capture responses in convergently evolved carnivorous pitcher plants
New Phytologist, Volume 249, Issue 5, Page 2559-2573, March 2026.Summary The Australian pitcher plant Cephalotus and the Asian pitcher plant Nepenthes exhibit striking morphological and functional similarities, serving as compelling examples of convergent evolution. Although trapping pitchers in both lineages represent some of the most elaborate leaf structures in angiosperms, it remains unknown whether their ...
Takanori Wakatake, Kenji Fukushima
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