Results 121 to 130 of about 4,920 (167)

计及电缆绝缘不均匀老化的接地电流相位角特性研究

Gaoya dianqi
交联聚乙烯（XLPE）电力电缆广泛应用于配电网和输电网，但它们在持续的电应力下遭受长期的老化退化，电缆老化容易造成绝缘击穿事故。为了提升电缆绝缘老化状态的在线评估技术，基于PSCAD建立了计及电缆绝缘不均匀老化的三芯管型电缆接地电流相位角计算模型，通过快速傅里叶变换FFT变化得到单相不均匀老化、双相不均匀老化、三相均匀老化3类情况的接电线电流相位角特性。结果表明：相比于钢铠接地线电流，屏蔽线电流相角对于老化特性的反应更为灵敏；对于单相老化，介电常数由2增加为5，屏蔽线电流相位角从-51.01°递增为 ...
刘刚, 王秀茹, 邱冬, 王德, 鲍诗杰, 张东东   +5 more
doaj  

[Trends in burden of osteoporosis in China from 1990 to 2023 and analysis of epidemiological factors]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Wu Y, Lai Z, Yan H, Zhou B, Chen W, Zeng Z.   +5 more
europepmc   +1 more source

[Analysis of disease burden and changing trends of traumatic brain injury in China, 1990-2023]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Han Y, Sun K, Pan W, Luo X.
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

[Disease burden trends of site-specific osteoarthritis in China from 1990 to 2023 and the attribution to high body mass index]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Xiong Q, Hu L, Hu Y, Liu Q, Li J, Yang C, Fu W.   +6 more
europepmc   +1 more source

[Advances on efficacy and mechanisms of acid fibroblast growth factor for promoting injured tissue repair]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhu F, Jiang Z, Qian X, Xu Y, Cheng H, Zhang J.   +5 more
europepmc   +1 more source

[Influencing factors of cognitive function decline in elderly patients with type 2 diabetes mellitus]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Zeng H, Tang G, Liu Q, He Y, Zhou H, Yan P.   +5 more
europepmc   +1 more source

[Epidemiological characteristics of adult inpatients with diabetes-related chronic non-healing wounds in Hainan province]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Yao JL, Li JX, Ming XC, Gu YT, Jiang T, Yang J, Bian YY, Zheng LY, Wang R, Zeng YF, Cheng SW.   +10 more
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

[The Association Between Depressive Symptoms and Multimorbidity Among Middle-Aged and Older Adults in Rural China: Sequential Mediation Effects of Pain and Activities of Daily Living]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Li C, Lai H, Pan J.
europepmc   +1 more source