Results 51 to 60 of about 3,600 (102)

[Exploration of the "Hainan Model" in the construction of specialized wound repair discipline]. [PDF]

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

特高压直流换流站多柱并联避雷器组局部故障机理研究

Dianci bileiqi
特高压直流换流站内的避雷器为了满足能量吸收需求，通常采用多柱并联的结构。但是多柱并联避雷器由于电流及吸收能量不均匀的问题容易发生局部故障，导致系统闭锁。为了明确故障机理，本研究分析了直流换流站内容易发生局部故障的金属回线转换开关（MRTB）避雷器以及中性母线金属回线（EM）避雷器的运行工况及结构特点，研究了不平衡故障的发生过程、故障现象以及解体检查结果，从氧化锌压敏电阻微观结构到避雷器组并联特性总结了局部故障发生的原因、机理，并提出了对应的故障应对措施。
刘志远, 何家欣, 李江涛, 赵欣洋, 陆洪建   +4 more
doaj  

[Exposures to volatile organic compounds are positively correlated with risks of metabolic dysfunction-associated steatotic liver disease]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Li K, Zeng W, Zhang Y, Zhu X, Guo B.
europepmc   +1 more source

基于自生成小波变换的配电电缆高阻故障精确定位方法

Gaoya dianqi
高阻故障是配电电缆常见故障形式之一，其准确定位对提升电网运行可靠性具有重要意义。针对传统小波变换中母小波需预设、难以与实际故障信号特征自适应匹配的问题，文中提出一种基于自生成小波变换的高阻故障定位方法。首先利用ATP-EMTP建立电缆分布参数模型，分析高阻故障击穿的波传播特性。其次，以故障波形初始段自适应生成母小波，并进行连续小波变换提取特征频率，实现故障精确定位。仿真结果表明，所提方法平均定位误差仅为0.168%，在鲁棒性、计算效率及采样频率适应性方面均优于传统过零点检测、傅里叶变换 ...
严有祥, 吴桐, 李振嘉, 陈静怡, 林智雄   +4 more
doaj  

[Best evidence summary for management of sleep disorders in children with attention deficit hyperactivity disorder]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Lin YT, Luo LH, Peng TQ, Tan CW, Lei H.
europepmc   +1 more source

[Trends in burden of pelvic fractures from 1990 to 2023 and long short-term memory-based insights into future projections]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Fan W, Yin Y, Tian C, Zhou J, Xie T, Shi L, Liu G, Rui Y.   +7 more
europepmc   +1 more source

[Construction of the evaluation index system for nursing quality management in outpatient dental clinics based on the structure-process-outcome model]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Wei J, Liu F, Yang C, Wang J, Ma Y, Yang J, Xie J, Xu L.   +7 more
europepmc   +1 more source

[Interpretation of the "International consensus on early rehabilitation and nutritional management for infants at high risk of neurological impairment"]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Wang J, Qiu HY, He XM, Liu Y, Xu KS, Rehabilitation Group of Pediatrician Branch of Chinese Medical Doctor Association.   +5 more
europepmc   +1 more source

可分离连接器引发的典型故障分析

Gaoya dianqi
文中针对屏蔽型可分离连接器引发的典型故障，从产品结构和故障实物照片对故障原因进行综合分析并提出引发故障的原因。通过对屏蔽型可分离连接器环氧树脂与嵌件在不同的配合状态下进行建模和电场仿真分析，说明故障分析的合理性，并根据相关标准进行在此类绝缘故障条件下与正常条件下的局放对比测试实验，进一步证明了故障分析的正确性。结合故障特点提出避免此类绝缘故障发生的指导性意见。
王东方, 马永强, 王景, 邰晨凡, 牛勃   +4 more
doaj  

[Research progress on toxic shock syndrome due to group A <i>Streptococcus</i> infection in children]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Wang HY, Zhou W, Huang LS.
europepmc   +1 more source