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大电流冲击对电阻片老化特性和能量吸收能力影响

Dianci bileiqi, 2019
基于换流站直流极线近区发生对地短路,直流滤波器的F1避雷器出现的冲击电流特征,分析了多次大电流冲击对F1避雷器用电阻片的性能影响。以平高东芝（廊坊）避雷器有限公司用于F1避雷器的两种电阻片为对象,研究了多次大电流冲击对电阻片老化特性、2 ms能量吸收能力以及保护特性的影响。验证了电阻片性能满足扎鲁特—青州±800 kV特高压直流工程需求。结果表明:多次大电流冲击对电阻片的能量吸收能力、老化特性以及保护性能没有明显影响。
姚玉锁, 宋继军, 张彦杰, 郎小华, 李宝兵, 李石磊, 刘凯   +6 more
doaj  

交流胶浸纤维套管绝缘材料热老化特性研究

Dianci bileiqi
胶浸纤维材料具有优异的拒水特性、机械强度和绝缘性能，被应用在特高压交流套管电容芯体主绝缘材料上。为研究热老化对胶浸纤维绝缘材料的影响，本文利用扫描电镜对不同热老化状态下的胶浸纤维试样表面微观结构进行分析。其次，使用频域介电图谱技术测量老化前后胶浸纤维试样的介电特性，并采用三弛豫Havriliak-Negami模型对介质损耗因数频域曲线进行计算拟合，通过利用自适应粒子群算法辨识模型参数，分析了热老化对模型参数的影响。研究结果表明：热老化作用下材料发生热氧反应，从而改变了环氧胶浸纤维试样的颜色 ...
谢雄杰, 刘泰蔚, 胡伟, 许佐明, 兰贞波   +4 more
doaj  

老年特发性膜性肾病与微小病变型肾病的临床特点比较

Zhongguo shiyan zhenduanxue, 2018
随着人口的老龄化,我国老年肾脏病患者逐年增多。据国内外研究报道[1-3],老年原发性肾小球疾病中以特发性膜性肾病和微小病变型肾病最常见,两种疾病共占46.59%,故对于老年肾脏病患者,应高度关注特发性膜性肾病和微小病变型肾病两种疾病类型。然而老年肾脏病患者因多种原因不能行肾脏穿刺活检 ...
王璐, 许颖, 苏森森, 许钟镐
doaj  

[Clinical characteristics, efficacy and safety of antifibrotic agents in elderly patients with connective tissue disease-associated interstitial lung disease]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Lan J, Chen Z, Cheng Y, Zhao L.
europepmc   +1 more source

[The practice of building a wound repair discipline system with Chinese characteristics in countryside area: insights from the "Three Souths" experience]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Fu XB.
europepmc   +1 more source

[Development and validation of a risk prediction model for cognitive impairment in rural elderly Chinese populations: evidence from the CHARLS study]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Wang F, Li W, Shang X, Li F.
europepmc   +1 more source

[Geriatric hip fracture and enhanced recovery after surgery: current status and future perspectives]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Xie T, Tian C, Rui Y.
europepmc   +1 more source

[Research progress on lactylation modification in pathogenesis of osteoarthritis]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Wu Y, Sun K, Ding Y, Li M, Liu Y, Wu L, Peng L, Shen B.   +7 more
europepmc   +1 more source

[Association between socioeconomic status and vision impairment among Chinese elderly]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Wei Y, Jian W.
europepmc   +1 more source

[Analysis of current status and trends of disease burden of knee osteoarthritis in China, 1990-2023]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Liao J, Wu Q, Wu G, Guo B, Zhang J.
europepmc   +1 more source