Results 121 to 130 of about 33,360 (167)

考虑残余应力影响的典型钢结构对接焊缝缺陷定位研究

Jianzhu Gangjiegou Jinzhan
对接焊缝为典型的钢结构焊缝形式，其位置处的裂纹和气孔型缺陷的准确检测对于钢结构维护有着重要的意义，使用磁记忆检测技术对焊缝裂纹和气孔型缺陷进行定位时，传统的零点极值理论由于焊接残余应力的影响，难以区分残余应力、焊接裂纹和气孔型缺陷所产生的磁信号，从而在实际检测中造成缺陷定位的误判和漏判，因此，从焊接裂纹和气孔型缺陷和残余应力所在区域磁信号产生机理的不同入手，开展考虑残余应力影响下的焊接裂纹和气孔型缺陷定位检测研究。首先对焊接残余应力与裂纹和气孔型缺陷产生磁信号的机理进行分析 ...
陈悦, 潘学豪, 邓淋方
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[Clinical and genetic characteristics of 14 children with sodium taurocholate co-transporting polypeptide deficiency]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Ma RX, Luo WH, Dai YL, Li GX, Wang F, Jiang O, Zhang YH, Tian YF.   +7 more
europepmc   +1 more source

[Analysis of clinical and genetic variation in neonatal intrahepatic cholestasis caused by citrin deficiency]. [PDF]

Zhonghua Gan Zang Bing Za Zhi, 2023
Ge LL, Chen CF, Liu L, Zheng X, Zhang XM, Zhang YD, Mei SY.   +6 more
europepmc   +1 more source

Rescuing lysosomal/autophagic defects via nanoapproach: implications for lysosomal/autophagic defect-related diseases. [PDF]

J Zhejiang Univ Sci B
Huang X, Fang Y, Song J, Hao Y, Cai Y, Wei P, Zhang N.   +6 more
europepmc   +1 more source

[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

[Physical growth and dietary characteristics of children with attention deficit hyperactivity disorder: a cross-sectional study]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi, 2023
Lin S, Wu DD, Chen SJ, Yan W, Dou LH, Li XN.   +5 more
europepmc   +1 more source

[Electroencephalographic assessment of the relationship between frontal alpha asymmetry and emotion dysregulation in children with attention deficit hyperactivity disorder]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Chen L, Zhao LL, Wu XC, Li HY, Zhang WW.
europepmc   +1 more source

[Defect modification of calcium silicate and its application in oral bacteriostasis and tooth remineralization]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Hu Y, Zhang S, Zhang J, Luo H, Li Y, Zhang J, Chen X.   +6 more
europepmc   +1 more source

Physical and neuropsychological development of children with Citrin deficiency. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi, 2021
Zhang NS, Zhang ZH, Lin WX, Zhang M, Li BX.   +4 more
europepmc   +1 more source

GIS设备机械缺陷振动信号特征分析技术研究

Gaoya dianqi
机械性振动缺陷的检测是保证GIS设备安全运行的有效手段之一，尚缺乏针对GIS设备内部多种构件机械缺陷振动规律的系统性研究。文中研发了一套GIS设备振动状态高灵敏检测装置，搭建了高电压大电流GIS设备机械缺陷模拟平台，模拟出5种典型缺陷，开展了GIS设备振动信号特性试验研究。试验结果表明，在负载电流不变的情况下，电压的改变对振动信号基本没有变化；在同一电压作用下，振动信号波形保持基本不变，振动信号幅值随着负载电流增加而增加；机械缺陷情况下，振动信号主要频谱为100 Hz，并叠加了较多的高频成分 ...
蒋西平, 李永福, 龙英凯, 王旭鹏, 汪泽州   +4 more
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