Gaoya dianqi, 2018 超、特高压避雷器电位分布的改善通常采用综合均压措施,即在高压端加均压环,同时在避雷器元件上并联均压电容柱。虽然均压电容柱能有效改善避雷器电压分布,但也带来了性能难以检验及参数选择不当会使避雷器运行可靠性下降等诸多不安全因素。通常均压柱中电容器电容比避雷器电阻片电容小很多,电容柱自身的电位分布比电阻片柱更不均匀,局部电容器的荷电率很高,会导致其加速老化,直至毁坏。文中采用有限元法建立1 000kV交流系统无间隙金属氧化物避雷器挂网运行时的三维仿真模型,在给定的均压环配置基础上 ...
张金凤 +5 more
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[Effectiveness of posterior single-level osteotomy with 360° release and correction in treatment of osteoporotic vertebral compression fractures with moderate to severe kyphosis]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiQing P +5 more
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[Current status and future directions of stability reconstruction following spinal tumor resection]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZhou J, Dong J.
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《电瓷避雷器》“金属氧化物避雷器性能研究新动向和新成果”专题征稿启事
Dianci bileiqi, 2017 金属氧化物避雷器（以下简称MOA）自二十世纪八十年代问世以来,经过科研人员近四十年对电阻片配方、工艺和结构的改进优化研究和运行经验的积累,尤其是在我国交、直流特高压工程快速发展的推动下,MOA制造技术和综合性能有了长足发展,主要表现在更加优异的非线性、超低压比和高密度通流能力。结合新材料和新技术的应用,避雷器已实现了多类别、多品种,可适应于多种极端场合的应用。结构上涉及无间隙MOA、超规模多柱并联MOA、带串/并联间隙MOA、可控MOA、可触摸式MOA等;安装方式上有座式、悬挂式、横卧式等 ...
doaj
[Rehabilitation guidelines and specifications for traumatic spinal cord injury (2025 edition)]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiProfessional Committee Of Spine And Spinal Cord Injury Rehabilitation China Association Of Rehabilitation Of Disabled Persons +3 more
europepmc +1 more source
[Determination of caffeine and taurine in electronic cigarette oil by high performance liquid chromatography- tandem mass spectrometry]. [PDF]
Se PuSun X +4 more
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[Research progress on the pretreatment and analysis of prohibited components of glucocorticoids in cosmetics]. [PDF]
Se PuLiu L, Xiao XH, Fang JH, Li GK.
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基于CT的影像组学列线图对布鲁氏菌性脊柱炎和脊柱结核的鉴别价值
Zhongguo shiyan zhenduanxue目的基于CT的影像组学列线图鉴别布鲁氏菌性脊柱炎（BS）和脊柱结核（TBS）。方法回顾性分析2018年1月至2023年3月94例布鲁氏菌性脊柱炎及脊柱结核患者的临床资料及CT图像，按照7∶3随机分为训练集和测试集。基于训练集数据，对临床及常规CT征象进行组间差异性分析，并采用多因素logistic回归构建临床模型。基于CT图像提取影像组学特征，并筛选出最优特征计算影像组学评分（Radscore）。联合Radscore、临床特征构建联合模型并绘制列线图。采用受试者工作特征曲线下面积（AUC）、特异性 ...
奇丽霞 +7 more
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[Establishment and application of a knowledge-directed pseudo-targeted analytical method for diabetic retinopathy]. [PDF]
Se PuHou YQ +8 more
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[Preparation of a chiral porous organic cage-bonded silica high performance liquid chromatography stationary phase and its application to the resolution of chiral compounds]. [PDF]
Se PuWu JL +5 more
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