Results 61 to 70 of about 32,112 (136)
Dianci bileiqi, 2022 近年来我国复合绝缘子由于芯棒发热导致异常温升的故障时有发生,给电网安全运行带来隐患。为了研究芯棒发热的热传导特性,以及复合绝缘子内外温度的关系,笔者通过理论推导,建立了芯棒发热的热传导模型,并开展仿真与实验研究。结果表明,当复合绝缘子芯棒发热时,硅橡胶护套中径向温度成对数分布,芯棒表面温度与护套表面温度为一次函数关系,并且复合绝缘子内外温差与复合传热系数成正比,与护套导热系数和环境温度成反比,而环境湿度对复合绝缘子芯棒发热的热传导没有明显影响。仿真与实验结果相吻合,验证了热传导模型的准确性。
曾磊磊 +10 more
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Review of Policy Research, Volume 43, Issue 6, November 2026.ABSTRACT The EU policy framework for nature restoration has undergone a significant change with the adoption of the Nature Restoration Regulation. Since 2022, the EU has developed a new comprehensive and continent‐wide legislation to restore degraded ecosystems and halt biodiversity loss, which came into force in August 2024 and is an integral part of ...
Ronit Justo‐Hanani
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Review of Policy Research, Volume 43, Issue 6, November 2026.ABSTRACT Nature conservation conflicts increasingly extend beyond ecological objectives to disputes over decision‐making legitimacy, institutional authority, and competing understandings of landscape and expertise. This article examines the conflict over the proposed designation of Křivoklátsko as a national park in the Czech Republic between 2021 and ...
Filip Simon
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Zhongshan Daxue xuebao. Yixue kexue ban, 1992 1980～1990年,作者收治原发性肝癌660例,手术切除124例(18.8％)。术后肝内复发者32例(肝内复发率25.8％),2 年以内复发者占93.8％。93.7％合并肝硬化,15.5％并发门脉高压症。复发肝癌中4例(3.2％,4/124)行再切除,术后生存平均26.8月;22例行B超引导肝癌复发灶无水酒精注射术,术后8例死亡,平均生存8.5月;10例行肝动脉栓塞化疗或肝动脉结扎及插管化疗,术后生存平均16.8月,对照组仅4.5月。复发癌再次外科治疗以再切除术为首选(术后生存26.8～42.6月 ...
doaj
人乳头状瘤病毒感染与鼻内翻性乳头状瘤发病、复发及恶变关系的研究
Zhongguo shiyan zhenduanxue, 2019 目的探究人乳头状瘤病毒(HPV)与鼻内翻性乳头状瘤(SNIP)发病、复发及恶变间的关系。方法收集2004.09-2017.09于首都医科大学附属北京同仁医院入院接受手术治疗患者的石蜡标本(156例),按术后病理诊断分为正常黏膜组织组(简称正常组,共33例)及SNIP组(123例),随访截至2017.11.30(平均随访时间62.15月),按随访结果分为治愈组(至随访结束暂未见复发或恶变,57例)、复发组(至随访结束出现一次及以上复发但暂未出现恶变,30例)、恶变组(至随访结束已出现明确恶变、原位癌变或中-
王阳, 吴迪, 娄鸿飞, 王成硕
doaj
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT The deformation behavior of NiTiNb shape memory alloys is governed by microstructural heterogeneity, specifically the interconnected topology of the β‐Nb phase. The regulatory role of the eutectic structure in load partitioning and the evolution of deformation mechanisms, particularly in high‐Nb systems, has not been clearly understood.
Qingda Zhang +11 more
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Zhongshan Daxue xuebao. Yixue kexue ban, 2016 摘 要: 【目的】 探讨阵发性房颤患者P波时限对射频消融术后复发的预测意义?【方法】 171例行环肺静脉隔离术的阵发性房颤患者,描记术前及术后心电图,测量Ⅱ?Ⅲ?aVF?V1导联P波时限,计算P波时限变化值? 【结果】 Ⅱ?Ⅲ?Ⅵ导联术后P波时限均小于术前(P < 0.001)?依据随访情况,患者分为复发组32例及未复发组139例?复发组较未复发组在Ⅱ?Ⅲ?Ⅵ导联具有更小的P波时限变化值(P < 0.01),两组术前?术后P波时限及其他临床指标无统计学差异;多因素分析显示更小的Ⅱ导联P波时限变化值(P <
胡晓亮
doaj
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Surface‐enhanced Raman scattering (SERS) has emerged as a highly sensitive and specific technique for tumor imaging, owing to its narrow spectral features, resistance to photobleaching, and capability for multiplexed detection. However, its clinical translation remains limited by poor tissue penetration and the absence of intrinsic anatomical ...
Xinyu Miao +7 more
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Systematic studies on the fatigue deformation and damage mechanisms of nickel‐based single‐crystal superalloys (Ni‐SXs) under combined thermal and mechanical conditions remain limited, particularly regarding the influence of strain amplitude on the relative contributions of fatigue and oxidation damage.
Liyin Zhang +7 more
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Developing rapid, precise gas sensors for Listeria monocytogenes (LM) biomarker detection faces challenges due to suboptimal gas‐solid interactions. Herein, we report the rational synthesis of amino‐functionalized mesoporous SiO2 hollow nano‐doughnuts (MS‐2‐NH2‐2) via modification with (3‐aminopropyl) trimethoxysilane (AAPTMS), which enables ...
Xingyu Wang +7 more
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